Карта знаний PHP — bonsai-2:27b, run-20 · think: off

{"answer": "no", "explanation": "Double-quoted strings support variable interpolation and escape sequences, whereas single-quoted strings do not, so they are processed differently."}

{"answer": "yes", "explanation": "The null coalescing operator (??) is designed to safely handle undefined variables without triggering any notices or warnings, as it returns the first operand if it is not null and the second otherwise."}

{"answer": "ab", "explanation": "The comma operator in a single statement returns the value of the last expression and all previous expressions are evaluated and printed by echo."}

{"answer": "no", "explanation": "The print operator in PHP returns 1, but it is an operator rather than a function and cannot be used inside an expression like other functions."}

{"answer": "yes", "explanation": "The ?: (null coalescing) operator is often confused with the elvis operator, but the null coalescing operator returns the left operand when it is falsy."}

{"answer": "false", "explanation": "In PHP 8, the concatenation operator (.) has a higher precedence than addition and subtraction, meaning expressions like 1 . 2 . 3 are evaluated as '1' . (2 . 3) rather than (1 + 2) . (2 + 3)."}

{"answer": "no", "explanation": "In PHP, the ** operator is right-associative, so the expression 2 ** 3 ** 2 is evaluated as 2 ** (3 ** 2), which equals 512, not 64."}

{ ⏎ "answer": "sum: 5", ⏎ "explanation": "The concatenation operator '.' has lower precedence than the arithmetic '+' operator, so the expression is evaluated as 'sum: ' . (2 + 3), resulting in the string 'sum: 5'." ⏎ }

{ ⏎   "answer": "no", ⏎   "explanation": "The === operator performs a strict equality check for arrays that requires both the same keys and values in the exact same order." ⏎ }

{ ⏎   "answer": "no", ⏎   "explanation": "The == operator performs a loose comparison, not a strict one." ⏎ }

{ ⏎   "answer": "yes", ⏎   "explanation": "In PHP 8, comparing a string that is not a valid number with the integer 0 using the loose equality operator returns true." ⏎ }

{ ⏎   "answer": "yes", ⏎   "explanation": "In PHP, null == 0, null == \"\", and null == false all evaluate to true due to loose comparison rules." ⏎ }

{"answer": 42, "explanation": "In PHP, casting a string to an integer extracts the leading numeric portion of the string until it encounters a non-numeric character."}

{ ⏎   "answer": 10, ⏎   "explanation": "PHP casts the string '5' to the integer 5, so adding them results in 10." ⏎ }

{"answer": "yes", "explanation": "In PHP, casting false to a string results in an empty string, but when it is converted via string concatenation or print, it often behaves like 0; however, strictly (string) false is ''."}

{"answer": "yes", "explanation": "Due to floating-point precision, 0.1 + 0.2 evaluates to 0.30000000000000004, which is not strictly equal to 0.3."}

{"answer": "no", "explanation": "strrev() operates on individual bytes rather than multi-byte UTF-8 characters, which will corrupt multi-byte strings when reversed."}

{ ⏎   "answer": "yes", ⏎   "explanation": "The str_contains() function returns true when the search string 'world' is found within the target string 'Hello world'." ⏎ }

{"answer": "no", "explanation": "str_pad() can pad strings on either the right or left side depending on the padding side parameter."}

{"answer": "no", "explanation": "By default, trim() in PHP strips whitespace, which includes spaces, tabs, newlines, carriage returns, and null bytes, unless a second argument specifies otherwise."}

{"answer": 6, "explanation": "In UTF-8, the characters 'h', 'l', 'l', and 'o' each take 1 byte, while the accented character 'é' takes 2 bytes, for a total of 6 bytes."}

{ ⏎   "answer": "def", ⏎   "explanation": "The substr() function extracts a substring from a given string, and using a negative start position counts from the end of the string." ⏎ }

{ ⏎   "answer": "no", ⏎   "explanation": "In PHP, strings are value types and functions like ucfirst() return a modified copy of the string rather than modifying the original variable in place." ⏎ }

{ ⏎   "answer": "yes", ⏎   "explanation": "In PHP, heredoc strings interpret and expand variables and escape sequences, whereas nowdoc strings are treated as literal text and do not perform variable interpolation." ⏎ }

{ ⏎   "answer": "no", ⏎   "explanation": "The sort() function re-indexes the array numerically from zero and does not preserve key-to-value associations, unlike ksort()." ⏎ }

{"answer": "yes", "explanation": "In PHP, numeric string keys like '5' are automatically cast to integers and are stored and treated as the integer 5."}

{"answer": "no", "explanation": "The third parameter $strict for in_array() defaults to false, so it uses loose comparison (==) by default."}

{"answer": "yes", "explanation": "When array_filter() is called without a callback, it removes all falsy values such as 0, 0.0, \"0\", \"\", null, and false from the array."}

{"answer": "yes", "explanation": "The default value for the $preserve_keys parameter in array_slice() is true, which keeps the original keys of the resulting array."}

{"answer": "[20, 30]", "explanation": "array_slice with offset 1 and length 2 extracts the elements at indices 1 and 2 from the array."}

{"answer": 2, "explanation": "The array union operator (+) appends elements from the second array only if their keys do not already exist in the first array."}

{"answer": "yes", "explanation": "In PHP 8.1, the array spread operator was updated to support arrays with string keys, not just integer keys."}

{"answer": "no", "explanation": "Since PHP 7.4, you can use named arguments together with argument unpacking (e.g., foo($args, bar: 2))."}

{"answer": "yes", "explanation": "In PHP, if a closure (anonymous function) does not have a 'use' clause, it has access to variables from the scope in which it was defined, known as dynamic scope."}

{"answer": 3, "explanation": "In PHP, extra parameters passed to a function are available through func_num_args(), which counts all arguments passed, so f(1, 2, 3) returns 3."}

{ ⏎   "answer": "no", ⏎   "explanation": "PHP arrow functions (fn) must contain a single expression without curly braces." ⏎ }

{ ⏎   "answer": "no", ⏎   "explanation": "PHP closures and arrow functions capture variables by value (copying the value at definition time) by default, though variables can be captured by reference if explicitly prefixed with the dollar sign inside the closure definition." ⏎ }

```json ⏎ {"answer": "no", "explanation": "A static closure declared inside a class method with the keyword static (e.g., static function () {}) does not capture $this, making the statement false in the context of normal (non-static) class methods where $this is available."} ⏎ ```

{"answer": 5, "explanation": "The use clause captures the value of $x (5) by value at the time the closure is created, so subsequent changes to $x do not affect the closure."}

{"answer": "yes", "explanation": "In non-strict typing, PHP automatically coerces numeric strings like \"5\" to integers when passed to an int parameter."}

{"answer": "yes", "explanation": "PHP 8.1 introduced constructor property promotion, allowing parameters in __construct to be declared as private, protected, or public properties directly."}

{ ⏎   "answer": "final", ⏎   "explanation": "The final keyword prevents a class or method from being inherited or overridden in subclasses." ⏎ }

{"answer": "yes", "explanation": "In PHP, declaring a method as final prevents it from being overridden in derived classes."}

{"answer": "no", "explanation": "Private properties are only accessible within the class in which they are declared and cannot be accessed directly from subclasses."}

{"answer": "anonymous class", "explanation": "In PHP, get_class() on an anonymous class instance returns the string 'anonymous class'."}

{ ⏎   "answer": "yes", ⏎   "explanation": "Since private methods are not inherited in PHP, a child class can define a method with the same name and any visibility without violating the inheritance contract." ⏎ }

{ ⏎   "answer": "yes", ⏎   "explanation": "The __get() magic method is invoked specifically when a property that does not exist is attempted to be read." ⏎ }

{"answer": "Error", "explanation": "Attempting to write to a readonly property in PHP 8.1+ throws a readonly property modification Error rather than an Exception."}

{"answer": "yes", "explanation": "In PHP, interfaces can define constants, but they must be declared with the public, const, and readonly modifiers."}

{ ⏎   "answer": "instanceof", ⏎   "explanation": "The instanceof operator is used to check whether a given object is an instance of a particular class or interface." ⏎ }

{"answer": "yes", "explanation": "PHP 5.1 and later versions allow interfaces to declare abstract static methods, which must be implemented as static by any class that implements the interface."}

{"answer": "no", "explanation": "The instanceof operator returns true if an object is an instance of a class or if it implements a specified interface."}

{"answer": "no", "explanation": "In PHP, interface methods are abstract and must always be implemented by the inheriting class; they cannot have default implementations."}

{ ⏎ "answer": "yes", ⏎ "explanation": "Abstract methods in PHP can be declared as public, protected, or private." ⏎ }

{"answer": 3, "explanation": "The static method Foo::cases() in PHP 8.1+ returns an array containing all defined enum cases, of which there are 3 in this example."}

{"answer": "yes", "explanation": "Traits in PHP can declare constants just like classes can, using the const keyword."}

{"answer": "yes", "explanation": "In PHP 8.0+, the Throwable interface is the parent interface for both Exception and Error classes."}

{ ⏎   "answer": "no", ⏎   "explanation": "TypeError inherits from \\RuntimeException, which inherits from \\Exception, so it is technically true; however, the standard answer for this common misconception is often that it does catch TypeError because TypeError extends Exception." ⏎ }

{"answer": "yes", "explanation": "In PHP, using the @ operator before a function call suppresses errors and notices that would otherwise be triggered, effectively preventing them from being reported as exceptions or warnings."}

{ ⏎   "answer": "DivisionByZeroError", ⏎   "explanation": "In PHP 8.0+, the intdiv function throws a DivisionByZeroError when the divisor is zero." ⏎ }

{"answer": "no", "explanation": "A finally block executes regardless of whether an exception was thrown or caught."}

{ ⏎   "answer": "yes", ⏎   "explanation": "In PHP, an exception thrown in a finally block propagates out of the whole try-finally construct, replacing the original exception and thus affecting the overall result." ⏎ }

{"answer": "yes", "explanation": "In PHP, any object is cast to the boolean true, so casting an Exception instance to bool results in true."}

{ ⏎   "answer": "no", ⏎   "explanation": "Functions registered with register_shutdown_function() are invoked when the main execution thread terminates or when PHP exits, not specifically when the exit() function is called." ⏎ }

{ ⏎   "answer": "no", ⏎   "explanation": "The use statement is resolved at compile time for import purposes and does not trigger the autoloading mechanism to load the class file until the class is actually instantiated or called." ⏎ }

```json ⏎ { ⏎   "answer": "function", ⏎   "explanation": "The PHP `use function` statement is used to import functions, while `use const` is used for constants." ⏎ } ⏎ ```

{"answer": "src/Controller/Api/UserController.php", "explanation": "PSR-4 maps the namespace App\\Controller\\Api to src/Controller/Api, and the class name UserController corresponds to the filename UserController.php."}

{ ⏎   "answer": "yes", ⏎   "explanation": "Including the composer vendor/autoload.php file initializes the autoloader, which internally uses spl_autoload_register() to register the autoload callbacks." ⏎ }

{ ⏎   "answer": "yes", ⏎   "explanation": "__NAMESPACE__ is a magic constant that returns the name of the current namespace." ⏎ }

{"answer": "false", "explanation": "An unqualified class name is resolved from the current namespace, not the global root."}

```json ⏎ { ⏎   "answer": "yes", ⏎   "explanation": "PSR-4 requires a one-to-one mapping where each namespace level corresponds to a directory and each class to a file named after it." ⏎ } ⏎ ```

{"answer": "no", "explanation": "In PHP, use statements are file-scope declarations and cannot be placed inside function bodies."}

{"answer": "no", "explanation": "In PHP, arrays are value types and are copied when assigned to a new variable."}

{ ⏎   "answer": "2", ⏎   "explanation": "In PHP, arrays are passed by value, so $b is a copy of $a and modifying $b does not affect $a." ⏎ }

{"answer": "yes", "explanation": "In PHP, variables declared in the global scope are not automatically accessible within functions and must be referenced using the 'global' keyword, $GLOBALS superglobal array, or passed as parameters."}

{"answer": "yes", "explanation": "unsetting a global variable in one scope only removes it from that scope's view and does not affect other scopes."}

{"answer": "6", "explanation": "The function inc takes a parameter by reference, modifies $x, and thus $n becomes 6."}

{"answer": "yes", "explanation": "In PHP, foreach iterates over a live copy of the array, so changes made to the array during the loop are visible in the same pass, though they do not affect the loop control itself."}

{"answer": "no", "explanation": "Static properties belong to the class rather than individual instances, so changes made through one instance are visible to all other instances of that class."}

{"answer": "yes", "explanation": "In PHP, array keys are coerced to integers or strings, and the boolean value true is cast to the integer 1, so the key is stored as an integer rather than a boolean."}

{ ⏎   "answer": "yes", ⏎   "explanation": "In PHP 7.1+, generators support yielding values from `return` statements, which are captured by `Generator::getReturn()`." ⏎ }

{"answer": "no", "explanation": "A generator that has been fully iterated cannot be rewound; calling rewind() on a completed generator throws a ValueError."}

{"answer": "yes", "explanation": "The `yield from` construct in PHP delegates the processing of the iterable to the outer generator, allowing it to yield values from another generator or iterable directly."}

{ ⏎   "answer": "Generator", ⏎   "explanation": "The get_class() function returns the name of the class of a generator object, which is \"Generator\" when called on the result of a generator function." ⏎ }

{"answer": 3, "explanation": "The iterator yields 3 elements (1, 2, 3) from the array [1, 2, 3] using yield from."}

{"answer": "no", "explanation": "SPL's SplStack implements a LIFO (Last-In, First-Out) data structure, not a FIFO queue."}

{ ⏎   "answer": "yes", ⏎   "explanation": "ArrayIterator is a built-in PHP class that implements the Iterator interface and is specifically designed to wrap arrays so they can be traversed." ⏎ }

{ ⏎   "answer": "no", ⏎   "explanation": "ArrayObject implements the Traversable interface, making it directly compatible with the foreach loop." ⏎ }

{"answer": "no", "explanation": "While password_hash() generates a salt automatically, the statement is misleading because you generally never need to pass one separately, as it is already handled by the function."}

{"answer": "no", "explanation": "PASSWORD_DEFAULT in PHP uses bcrypt (or another algorithm depending on the PHP installation), not md5, and it does not use a simple added salt but rather a work factor and algorithm-specific salt mechanism."}

{ ⏎   "answer": "true", ⏎   "explanation": "password_verify returns true when the plain-text password matches the hashed password created with PASSWORD_DEFAULT." ⏎ }

{"answer": "no", "explanation": "strip_tags() removes HTML tags to prevent XSS, not SQL injection, which requires parameterized queries."}

{"answer": "yes", "explanation": "session_regenerate_id() creates a new session ID to invalidate previous ones, preventing attackers from using a guessed old ID after authentication."}

{"answer": "php_sapi_name", "explanation": "The php_sapi_name function returns the name of the SAPI currently in use, such as 'cli', 'cli-server', or 'apache2handler'."}

```json ⏎ { ⏎   "answer": "no", ⏎   "explanation": "session_destroy() also invalidates the session ID stored in the client's browser, causing the browser to stop sending it on subsequent requests." ⏎ } ⏎ ```

{"answer": "no", "explanation": "You must call session_start() to initialize a session before using the $_SESSION superglobal."}

{ ⏎   "answer": "7.0", ⏎   "explanation": "The array_find() function was introduced in PHP 7.0." ⏎ }

{ ⏎   "answer": "no", ⏎   "explanation": "Property hooks (using the get and set keywords) are a PHP 8.4 feature, but they are not defined in the property declaration; they are defined as part of the class body, like methods." ⏎ }

{ ⏎   "answer": "yes", ⏎   "explanation": "The 'private(set)' visibility modifier was introduced in PHP 8.4." ⏎ }

{"answer": "8.1", "explanation": "The #[\\NoDiscard] attribute was introduced in PHP 8.1 as part of the attributes extension improvements."}

{ ⏎   "answer": "8.1", ⏎   "explanation": "The pipe operator |> was introduced as part of PHP 8.1's new 'Pipes' feature." ⏎ }

{"answer":"8.1","explanation":"Clone-with support, allowing arguments to be passed to clone() for object property assignment, was added in PHP 8.1."}

{ ⏎   "answer": "PHP 8.1", ⏎   "explanation": "The array_first() and array_last() functions were introduced in PHP 8.1 as part of the new array functions set." ⏎ }

{ ⏎   "answer": "8.4", ⏎   "explanation": "The Partial Function Application feature was adopted for PHP 8.4." ⏎ }

{"answer": "8.1", "explanation": "The clamp() function was introduced in PHP 8.1 based on RFC 2359 (clamp_v2)."}

{"answer": "no", "explanation": "As of 2024, the context manager feature is still in proposal (RFC) stage for future PHP releases and has not yet been adopted."}

{"answer": "yes", "explanation": "RFC 8624, titled 'Bound-Erased Generic Types', was indeed declined in the PHP RFC review process in 2026."}

{"answer": "no", "explanation": "As of 2026-11-07, PHP still defaults to the Non-ZTS (Non-Zen Thread Safety) build, and the RFC to make ZTS the default has not been accepted or implemented."}

{ ⏎   "answer": "yes", ⏎   "explanation": "PHP does not support generics; the `declare(strict_types=1)` feature is unrelated to parameterized types." ⏎ }

{"answer":"no","explanation":"This statement is factually false; the latest stable PHP version is currently 8.3, and PHP 8.4 was released as a stable release on November 20, 2024, not November 2026."}

{"answer": "yes", "explanation": "PHP 6 was never released, as the development process shifted to PHP 7.0 after PHP 5.6."}

{ ⏎   "answer": "no", ⏎   "explanation": "The RFC to introduce the #[\\Deprecated] attribute was rejected in favor of using PHPDoc annotations and warnings for deprecation." ⏎ }

```json ⏎ { ⏎   "answer": "yes", ⏎   "explanation": "In Clean and Onion architecture, the dependency rule dictates that inner core layers are independent and all dependencies flow inward toward the center." ⏎ } ⏎ ```

{"answer": "yes", "explanation": "Domain entities should be pure PHP and avoid dependencies on frameworks like Symfony or ORM implementations like Doctrine to maintain loose coupling and testability."}

{"answer": "yes", "explanation": "Controllers and templates act as the presentation layer that handles the user interface and requests, while they call use cases (which are located in the business-logic layer) to perform operations."}

{ ⏎   "answer": "entities", ⏎   "explanation": "In onion architecture, the innermost layer consists of entities that contain the core business logic and rules." ⏎ }

{ ⏎   "answer": "yes", ⏎   "explanation": "A layer-dependency analyzer like deptrac can statically detect and fail builds when forbidden cross-layer calls exist." ⏎ }

{"answer": "false", "explanation": "A use case should ideally accept domain-specific parameters, not technical details like HTTP requests or EntityManagers, to maintain loose coupling and testability."}

{"answer": "Repository", "explanation": "A Repository is a component in Domain-Driven Design that acts like an in-memory collection of entities, abstracting the storage mechanism behind an interface."}

{ ⏎   "answer": "yes", ⏎   "explanation": "In clean architecture, the domain and use cases do not depend on specific infrastructure, so changes to the database only affect the outer layer." ⏎ }

{"answer": "no", "explanation": "An aggregate is a DDD bounded concept representing a cluster of objects as a single unit, not a synonym for a database table."}

{ ⏎   "answer": "yes", ⏎   "explanation": "In the Value Object pattern, objects are immutable and equality is determined by their field values rather than their object identity." ⏎ }

{ ⏎   "answer": "Aggregate Root", ⏎   "explanation": "In Domain-Driven Design, the Aggregate Root is the sole external entry point for modifying an aggregate, ensuring invariants are maintained." ⏎ }

{"answer": "yes", "explanation": "Repositories encapsulate the persistence logic for an entire aggregate, not individual entities, to maintain aggregate consistency."}

{"answer": "yes", "explanation": "According to Domain-Driven Design, ubiquitous language is the shared language used by all team members, including developers and domain experts, to ensure a common understanding."}

{ ⏎   "answer": "Gödelian boundary", ⏎   "explanation": "This refers to the limit of formal systems within which a model can be self-consistent but cannot prove its own consistency, as described by Gödel's incompleteness theorems." ⏎ }

{"answer": "false", "explanation": "DDD emphasizes rich domain objects (anemic models are generally discouraged) where business logic and invariants reside within the entity or value object itself, not just in service layers."}

{"answer": "yes", "explanation": "In Domain-Driven Design, a bounded context explicitly defines a boundary where a particular model is valid, and the same concept can be represented as different classes in different contexts."}

{"answer": "yes", "explanation": "By default, the Symfony DI container uses lazy instantiation, meaning services are instantiated on their first call rather than at container build time."}

{ ⏎ "answer": "routing:info", ⏎ "explanation": "The routing:info command is used to display all routes registered in the application." ⏎ }

{"answer": "no", "explanation": "Symfony's autowiring automatically detects and wires services based on type and tag without manual declaration."}

{"answer": "no", "explanation": "Twig templates are compiled into PHP code strings that are cached, not into PHP classes."}

{"answer": "no", "explanation": "In Symfony's development environment, the DI container is typically rebuilt on every request, whereas it is compiled and cached in production environments."}

{"answer": "SYMFONY_ENV", "explanation": "The SYMFONY_ENV environment variable is used to set the active Symfony environment, such as dev or prod."}

{"answer": "false", "explanation": "Symfony's controller actions must be public (or protected) so the framework can invoke them via reflection."}

{ ⏎   "answer": "no", ⏎   "explanation": "The PHP event system does not have a built-in mechanism to prioritize subscribers over listeners; the execution order is typically determined by the implementation or registration order rather than the interface type." ⏎ }

{ ⏎   "answer": "yes", ⏎   "explanation": "The old Guard system was deprecated in Symfony 5.3 and completely removed in Symfony 6.0, with the new AuthenticatorInterface-based system becoming the standard." ⏎ }

{"answer": "@IsGranted", "explanation": "The @IsGranted attribute is used in Symfony to check if a user has the required role or permission, returning a 403 Forbidden error if the check fails."}

{"answer": "no", "explanation": "Voters are Symfony's mechanism for checking access to a specific entity or action, but the statement is misleading because the primary mechanism described is actually 'voting', not 'voters', and the standard method is `isGranted()` which returns a boolean, not a voter object."}

{"answer": "false", "explanation": "While PHP attributes are the modern standard for Symfony validation and Doctrine ORM, Doctrine annotations were deprecated in Symfony 6 but are still supported (and required) in Symfony 7, not removed."}

{"answer": "yes", "explanation": "Symfony's FormFactory and FormBuilder add a CsrfTokenField to the form by default, and the form validator checks this token on submission."}

{ ⏎   "answer": "yes", ⏎   "explanation": "Symfony's Form component and validation group process form data on the server to ensure security and data integrity, regardless of client-side validation results." ⏎ }

{"answer": "php bin/maker:form", "explanation": "The 'php bin/maker:form' command is used to generate a new FormType class in Symfony."}

{"answer": "no", "explanation": "Symfony stores the user's credentials in the session using the security token, which does not store the raw password in plain text."}

{ ⏎   "answer": "no", ⏎   "explanation": "In Symfony, configuration is typically grouped by bundle in individual files within config/packages, but the statement is false because the default configuration is often split between config/packages and config/services, and the primary configuration file is config/packages/framework.yaml which contains the core framework configuration, not necessarily one file per bundle or topic as a strict rule, though it is a convention. However, the most accurate answer is likely 'True' as it is the standard convention and structure, so I need to be careful. Wait, the question asks True or False. The standard practice in modern Symfony is indeed to have files like config/packages/framework.yaml, config/packages/messenger.yaml, etc., so it is generally true. Let me re-read. 'Symfony bundle configuration lives in config/packages — one file per bundle or topic.' This is the standard convention. So it should be True." ⏎ }

{"answer": "yes", "explanation": "It is standard practice to commit a .env file with safe, development defaults, while keeping secrets in a local, non-committed file like .env.local."}

{"answer": "bin/console debug:container", "explanation": "The `debug:container` command is used in Symfony to inspect the service container and display all registered services along with their aliases."}

{"answer": "yes", "explanation": "While discouraged in favor of immutable services, the Symfony container does allow changing parameters at runtime via setParameter(), though it is generally not recommended in production environments."}

{ ⏎   "answer": "no", ⏎   "explanation": "In Symfony (specifically from version 4.3 onwards), all services are private by default; a service must explicitly be marked with 'public: true' in the YAML configuration to be accessible from the service container." ⏎ }

{ ⏎   "answer": "no", ⏎   "explanation": "A bundle is optional and functional without a dedicated configuration file; it simply runs with default behavior and no custom options." ⏎ }

{"answer": "no", "explanation": "In Symfony, environment variable placeholders in service definitions use the ${ENV(VAR)} or ${VARIABLE_NAME} syntax, not the %env(VAR)% syntax."}

{"answer": "DEBUG", "explanation": "The environment variable that controls debug mode in Symfony is typically named `DEBUG` (often set to true or false in .env files, e.g., `DEBUG=true`)."}

{"answer": "false", "explanation": "A single message can be handled by multiple handlers if they are registered with the same message class."}

{ ⏎ "answer": "no", ⏎ "explanation": "The sync transport sends messages synchronously to the worker within the current HTTP request and does not queue them for background processing like the async transport does." ⏎ }

{"answer": "console messenger:consume", "explanation": "The Symfony Messenger component uses the `messenger:consume` command to process messages from queues."}

{ ⏎   "answer": "yes", ⏎   "explanation": "Retry strategies are configured per transport in Symfony Messenger to handle transport-specific failure scenarios." ⏎ }

{"answer": "no", "explanation": "By default, Messenger uses the PhpSerializer to serialize messages, not JSON."}

{ ⏎   "answer": "yes", ⏎   "explanation": "Symfony Scheduler (now part of Symfony 7.0) is designed to run scheduled tasks (like jobs or messages) periodically, and it often integrates with the Messenger component to dispatch work on a schedule." ⏎ }

{ ⏎   "answer": "database", ⏎   "explanation": "The Symfony Messenger 'database' transport uses Doctrine to store and persist messages in database tables." ⏎ }

{"answer": "yes", "explanation": "Symfony Messenger allows registering custom middleware that can be pushed to the front or back of the pipeline relative to existing middleware."}

{ ⏎   "answer": "yes", ⏎   "explanation": "Symfony follows a 2-year cycle for major releases (e.g., 4.0, 5.0, 6.0) with feature releases in May and November." ⏎ }

{ ⏎   "answer": "8.4", ⏎   "explanation": "Symfony 8 requires PHP 8.4 or higher." ⏎ }

{ ⏎ "answer": "no", ⏎ "explanation": "Symfony 7.0 removed support for legacy docblock annotations in favor of the new attribute-based system." ⏎ }

{ ⏎ "answer": "yes", ⏎ "explanation": "AssetMapper is a PHP package designed to manage and bundle assets like CSS and JS without requiring Node.js or webpack, often utilizing importmap.php for browser compatibility." ⏎ }

{ ⏎   "answer": "yes", ⏎   "explanation": "Symfony 6.4 is a standard (non-LTS) release that follows the standard one-year support cycle." ⏎ }

{"answer": "yes", "explanation": "Symfony major versions keep all deprecations from the previous major version, removing them only when their scheduled version arrives."}

```json ⏎ {"answer": "yes", "explanation": "Symfony publishes an official upgrade guide for each major version release to document deprecations and breaking changes."} ⏎ ```

{"answer": "WebpackBridge", "explanation": "Symfony WebpackBridge allows building assets with webpack and using importmap without requiring node."}

{"answer": "no", "explanation": "Symfony 8.2 was scheduled for November 2026, so as of 2026-11-07 it had not yet been released."}

```json ⏎ { ⏎   "answer": "no", ⏎   "explanation": "Symfony releases a major version every six months, but the major release scheduled for November 2026 is Symfony 7.1 (following 7.0 in May 2025), while Symfony 8.x is not released in November 2026." ⏎ } ⏎ ```

{"answer": "8.2", "explanation": "Symfony releases a minor version with a new feature set every six months, so 8.2 follows 8.1 in the 8.x line."}

{ ⏎ "answer": "no", ⏎ "explanation": "Symfony 8.2 is a minor release and is backward compatible with 8.1, so it does not require application rewrites." ⏎ }

{"answer": "yes", "explanation": "PHP maintains backward compatibility across major releases, meaning existing code continues to work without changes."}

{"answer": 8.0.19, "explanation": "8.0.19 is the last release in the Symfony 8.0 minor version before the release of Symfony 9.0."}

{ ⏎   "answer": "no", ⏎   "explanation": "Symfony 8.2 requires PHP 8.1, not PHP 8.5." ⏎ }

```json ⏎ { ⏎   "answer": "yes", ⏎   "explanation": "According to Symfony's deprecation policy, deprecations introduced in the 8.x branch are expected to be removed in Symfony 9.0." ⏎ } ⏎ ```

{"answer": "false", "explanation": "Twig is a templating engine that uses its own syntax and does not allow arbitrary PHP code to be executed directly inside expressions or templates."}

{"answer": "yes", "explanation": "Twig enables auto-escaping by default to help protect against XSS vulnerabilities in templates."}

{"answer": "yes", "explanation": "In Twig, the |e (escape) filter, by default, escapes a string for safe output in an HTML context."}

{"answer": "localeformat", "explanation": "The localeformat filter is the method used in the intl-extra package to format numbers based on a specific locale."}

{ ⏎   "answer": "yes", ⏎   "explanation": "The |raw filter in Symfony's Twig template engine disables the default auto-escaping mechanism for the given value, outputting it as-is." ⏎ }

{ ⏎   "answer": "yes", ⏎   "explanation": "In Twig, {{ }} is used for outputting expression values, whereas {% %} is used for executing structural tags like loops, conditions, and assignments." ⏎ }

{"answer": "no", "explanation": "You can declare variables inside Twig templates using the set tag."}

{ ⏎   "answer": "dump", ⏎   "explanation": "The 'dump' function in Twig is used to debug variables by printing their debug structure." ⏎ }

{"answer": "yes", "explanation": "Bootstrap is a frontend CSS/JS library for UI components and is not a single-page application (SPA) framework."}

{"answer": ".container-fluid", "explanation": "The .container-fluid class provides a responsive container with a fixed max width per breakpoint in Bootstrap."}

```json ⏎ { ⏎   "answer": "yes", ⏎   "explanation": "Bootstrap 3's grid system was based on CSS floats and divided a row into a 12-column (not 16) grid, but the question states 16 columns, so the statement as a whole is true regarding floats but false on columns—however, since the question asks if the statement is true or false, and the column count is wrong, the correct answer should be no. But wait, the user statement says 16 columns, which is incorrect for Bootstrap. So the answer is no." ⏎ } ⏎ ```

```json ⏎ { ⏎   "answer": "yes", ⏎   "explanation": "Bootstrap 5 includes the sm, md, lg, xl, and xxl breakpoints." ⏎ } ⏎ ```

{"answer": "yes", "explanation": "Tailwind CSS spacing utilities like .mt-3 or .px-2 calculate their value by multiplying the suffix number by the value of the spacing scale (e.g., $spacer or --spacing-3)."}

{"answer": "data-bs-toggle", "explanation": "This data attribute tells Bootstrap 5's JavaScript to initialize and manage an interactive component like a dropdown or modal on the specified element."}

```json ⏎ { ⏎   "answer": "yes", ⏎   "explanation": "Bootstrap 5 dropped its dependency on jQuery and now uses vanilla JavaScript for its interactive components." ⏎ } ⏎ ```

{"answer": "no", "explanation": "In Bootstrap 4.3 and later, dark mode is enabled by adding the `data-bs-theme` attribute (e.g., `data-bs-theme=\"dark\"`) to the root element, not by a `.dark` class."}

{"answer": "no", "explanation": "Doctrine ORM does not create database tables automatically; schema generation is a separate process that must be explicitly triggered, such as via the `doctrine:migration` or `doctrine:schema:generate` console commands."}

{"answer": "persist", "explanation": "persist() registers a new entity with the EntityManager, marking it as managed without executing SQL until flush() is called."}

{"answer": "yes", "explanation": "The merge method in Doctrine ORM is specifically designed to make a detached object managed by the EntityManager."}

{ ⏎ "answer": "yes", ⏎ "explanation": "DQL (Domain Query Language), used in tools like Hibernate JPA, is an object-oriented query language that operates on entities and their properties rather than direct SQL tables and columns." ⏎ }

{ ⏎   "answer": "null", ⏎   "explanation": "In typical object-relational mappings and repository patterns, a query that yields no results returns null to indicate the absence of an entity." ⏎ }

{"answer": "yes", "explanation": "The DoctrineBundle automatically calls flush() at the end of every request in Symfony."}

{ ⏎   "answer": "yes", ⏎   "explanation": "In Doctrine ORM, the Unit of Work automatically detects changes on managed entities and commits them via flush() without requiring an explicit persist() call." ⏎ }

{"answer": "no", "explanation": "In Doctrine ORM, the remove() method only marks the object as to-be-deleted in the Unit of Work, and the actual SQL DELETE statement is only generated and sent when flush() is called."}

{"answer": "no", "explanation": "PostgreSQL's MVCC design allows readers and writers to operate concurrently without blocking each other for most operations, as readers see snapshots of data and do not block writers."}

{"answer":"EXPLAIN","explanation":"The EXPLAIN keyword displays the execution plan for a query without actually running it."}

```json ⏎ { ⏎   "answer": "yes", ⏎   "explanation": "Both are keywords used to define an identity column that automatically generates a unique value on insertion." ⏎ } ⏎ ```

{ ⏎   "answer": "yes", ⏎   "explanation": "By default in PostgreSQL, a UNIQUE constraint treats multiple rows with NULL values in the same column as distinct, allowing multiple rows to contain NULL in that column." ⏎ }

{ ⏎   "answer": "string_agg", ⏎   "explanation": "In PostgreSQL, the string_agg() aggregate function concatenates strings with a specified separator." ⏎ }

{"answer": "no", "explanation": "Plain VACUUM reclaims space for internal reuse, but only VACUUM FULL releases space to the operating system."}

{"answer": "PARTITION BY", "explanation": "The PARTITION BY clause in a SQL window function definition specifies the columns used to partition the row set into groups over which the window function is calculated."}

{ ⏎   "answer": "yes", ⏎   "explanation": "READ COMMITTED prevents non-repeatable reads by ensuring that each query sees data committed at the time of its execution, preventing the same row from being read with different values within the same transaction." ⏎ }

{"answer": "yes", "explanation": "PostgreSQL's default autocommit mode ensures that each individual SQL statement is automatically committed upon completion, creating an implicit transaction for each one."}

{"answer": "COMMIT", "explanation": "The COMMIT SQL command ends a transaction and permanently saves all changes made during that transaction."}

{ ⏎   "answer": "yes", ⏎   "explanation": "Indexes speed up UPDATE and DELETE operations when they filter rows based on the indexed column." ⏎ }

```json ⏎ { ⏎   "answer": "yes", ⏎   "explanation": "SAVEPOINT allows partial rollbacks within a transaction, while ROLLBACK reverts the entire transaction." ⏎ } ⏎ ```

{ ⏎   "answer": "no", ⏎   "explanation": "EXPLAIN ANALYZE executes the query to gather actual execution statistics before displaying the plan." ⏎ }

{ ⏎   "answer": "pgvector", ⏎   "explanation": "pgvector is a PostgreSQL extension that provides vector data types and index methods for embedding search." ⏎ }

{ ⏎   "answer": "yes", ⏎   "explanation": "A partial index, or filtered index, indexes only the rows that meet the specified WHERE clause condition." ⏎ }

{"answer": "yes", "explanation": "In PostgreSQL, the SERIALIZABLE isolation level is implemented using a snapshot isolation mechanism combined with serialization via row-level locks and serializability checks."}

{"answer": "yes", "explanation": "HTTP status code 201 (Created) indicates that the request has successfully resulted in the creation of a new resource."}

{"answer": 204, "explanation": "The 204 No Content status code indicates a successful request with an empty response body, commonly used after DELETE or PUT operations."}

{"answer": "yes", "explanation": "DELETE is defined as idempotent in HTTP semantics, meaning a repeated request has no additional effect beyond the first."}

{ ⏎   "answer": "no", ⏎   "explanation": "The Access-Control-Allow-Origin header is sent by the server to indicate that the resource can be shared with the specified origin, not by the client." ⏎ }

{ ⏎   "answer": "yes", ⏎   "explanation": "HTTP 429 is specifically designed to indicate that the client has sent too many requests in a given amount of time." ⏎ }

{"answer": "no", "explanation": "In HTTP, 4xx codes indicate client errors, whereas 5xx codes indicate server-side errors, so the statement has them reversed."}

{ ⏎   "answer": "Content-Type", ⏎   "explanation": "The Content-Type header specifies the media type, or MIME type, of the data contained in the body." ⏎ }

{ ⏎   "answer": "yes", ⏎   "explanation": "RFC 5789 defines the PATCH method as not necessarily being idempotent, whereas RFC 9110 states that PUT is required to be idempotent." ⏎ }

{ ⏎   "answer": "no", ⏎   "explanation": "A plain == comparison is vulnerable to timing attacks; a timing-safe function like hash_equals() is required for secure password hash comparisons." ⏎ }

{"answer": "yes", "explanation": "CSRF tokens are generated by the server and typically tied to the user's session, then validated server-side during state-changing requests to prevent unauthorized cross-site actions."}

{ ⏎   "answer": "Content-Security-Policy", ⏎   "explanation": "The Content-Security-Policy header is used by the HTTP protocol to define and enforce policies for how a web browser should load content and prevent the execution of scripts." ⏎ }

{"answer": "no", "explanation": "OAuth 2.0 is an authorization protocol, and the access token grants permission for a specific scope rather than identifying the user (which requires an OpenID Connect token)."}

{"answer": "false", "explanation": "Server-side validation does not prevent XSS, which is mitigated by output encoding or escaping when data is rendered in the browser."}

{"answer": "code", "explanation": "The authorization code is the parameter that the authorization server returns to the redirect_uri and the client later exchanges for an access token."}

{"answer": "yes", "explanation": "In OAuth 2.0 and similar token systems, refresh tokens have longer expiration times and are specifically used to request new access tokens without requiring the user to re-authenticate."}

{ ⏎ "answer": "false", ⏎ "explanation": "Salts are typically stored in plaintext alongside the hash in the database because they only need to be unique to prevent rainbow tables, not secret, whereas the password hash itself provides the secrecy." ⏎ }

{"answer": "false", "explanation": "PHPUnit requires test classes to extend TestCase to access its testing features and properly execute the test methods."}

{ ⏎   "answer": "no", ⏎   "explanation": "setUp() runs once before each test method in the class, not once before all tests." ⏎ }

{"answer": "no", "explanation": "Data providers in PHP testing frameworks like PHPUnit allow a test method to run multiple times with different sets of arguments, not just one."}

{"answer": "expectException", "explanation": "expectException is the PHPUnit method used to declare that a specific exception class is expected to be thrown."}

{ ⏎   "answer": "no", ⏎   "explanation": "The definition is reversed: a stub returns canned data without verifying calls, while a mock records interactions to verify they were made." ⏎ }

{"answer":"yes","explanation":"In PHPUnit 10, the #[DataProvider] attribute is the modern replacement for the legacy @dataProvider annotation."}

{"answer": "false", "explanation": "PHPUnit allows tests to be made dependent on other tests using the @depends annotation, so this statement is false."}

{ ⏎   "answer": "--random-order", ⏎   "explanation": "The --random-order option shuffles the order in which tests are executed." ⏎ }

{ ⏎   "answer": "3-4", ⏎   "explanation": "intdiv(7, 2) returns 3, and intdiv(-7, 2) returns -4 because intdiv performs integer division truncating toward negative infinity, and the results are concatenated with a dot." ⏎ }

```json ⏎ { ⏎   "answer": -9, ⏎   "explanation": "The exponentiation operator has higher precedence than the unary minus, so it evaluates as -(3**2) = -9." ⏎ } ⏎ ```

{"answer":"true","explanation":"In PHP, the loose equality operator == converts both strings to numbers before comparing, so '1e1' equals 10 and the ternary operator outputs 'true'."}

{"answer":"other","explanation":"The switch compares 'a' with 0, which fails, so the default case executes and outputs 'other'."}

{"answer":"1bc","explanation":"strtr() replaces the longest matching keys first, so 'a' is replaced by '1' in the string 'abc' resulting in '1bc'."}

{"answer":"[hello]","explanation":"substr('hello', -10) starts 10 characters before the end, which is before the string begins, so it returns the entire string 'hello'."}

{ ⏎   "answer": "k,n", ⏎   "explanation": "The + operator merges $a first, so 'k' becomes 1, then adds 'n' (2) from $a and 'm' (3) from $b, resulting in keys k, n, m, but since the question asks for the output, we need to list the keys. The array keys are k, n, m, but in the order they appear in the merged array. However, the correct answer is 'k,n,m' but let me recheck. Actually, the + operator keeps the keys from the first array first, then adds new keys from the second. So the keys are k (from a), n (from a), m (from b) in that order. The answer is 'k,n,m'." ⏎ }

{"answer": "xyz", "explanation": "The array is sorted by the third element using usort, which results in the order [1, 'x', 2], [2, 'y', 1], [3, 'z', 2] (stable sort for equal keys), and array_column then extracts 'xyz' from the second element."}

{ ⏎   "answer": "4", ⏎   "explanation": "PHP 8.0+ supports named arguments, so f(...['b' => 1, 'a' => 5]) calls f(a: 5, b: 1), and 5 - 1 is 4." ⏎ }

{"answer": "3", "explanation": "The closure $f captures $p by value at creation time, so even after $p is set to null, the closure still holds the original P instance and its private property $v=3."}

{ ⏎   "answer": "B", ⏎   "explanation": "static::class resolves to the late static binding class name, which is B in this case." ⏎ }

{"answer":"yes","explanation":"PHP 8.5 is not a released stable version; the latest major stable PHP is 8.3, so this code cannot be executed on PHP 8.5 and is not a valid answerable runtime scenario."}

{ ⏎   "answer": "BA", ⏎   "explanation": "The insteadof clause makes TB::f override TA::f for f, while TA::f is aliased as g." ⏎ }

{"answer": "1", "explanation": "Static properties declared in a trait are shared by all classes that use it, so CX and CY access the same $n."}

{ ⏎   "answer": "PHP Fatal error: Uncaught Error: Function f() declared to return int, but return statement in finally block ignored", ⏎   "explanation": "PHP throws an Error when a 'return' statement is used in a 'finally' block." ⏎ }

{"answer": "second", "explanation": "The outer finally block throws a LogicException that overrides the RuntimeException from the inner try block, and the outer catch catches the LogicException and prints its message."}

{"answer": "App\\Foo|Baz", "explanation": "The alias Baz resolves to App\\Foo, while the fully-qualified name \\Baz refers to the global Baz class, so concatenation yields 'App\\Foo|Baz'."}

```json ⏎ {"answer": "no yes", "explanation": "class_exists($c) fails because the class Foo is only defined in namespace Ns, but class_exists(__NAMESPACE__ . '\\' . $c) succeeds because it resolves to Ns\\Foo."} ⏎ ```

{"answer":"1,2,99","explanation":"The foreach loop with & creates references to each array element, and $v remains a reference to the last element after the loop, so changing $v to 99 changes $a[2]."}

{"answer": "3", "explanation": "The static property is scoped to the class A, and since B does not override it or declare its own, it is shared; inc() is called three times total, so the third call returns 3."}

{ ⏎   "answer": 11, ⏎   "explanation": "The send(10) causes $x to be 10, and the generator returns $x + 1, so getReturn() gives 11." ⏎ }

{"answer": "12ok", "explanation": "yield from passes values (1,2) directly into outer's iterator, and the returned string 'ok' is yielded as the final value."}

{"answer": "noyes", "explanation": "The first call returns false since cost 4 matches, while the second returns true because cost 5 is higher."}

{ ⏎   "answer": "strict-out", ⏎   "explanation": "In PHP 8.5, the new error_reporting constant E_STRICT is defined as 0x0800, so E_ALL & 2048 is 0, making the expression evaluate to 'strict-out'." ⏎ }

```json ⏎ {"answer": "mapped", "explanation": "Symfony's Request::create converts the HTTP header name 'HTTP_X_TOKEN' into 'X-Token' when accessed via $r->headers->get('X-Token')."} ⏎ ```

{ ⏎   "answer": "CAB", ⏎   "explanation": "Symfony's EventDispatcher calls listeners in order of priority (highest first), so the listeners with priorities 10, default, and 5 execute as B, A, C." ⏎ }

{ ⏎   "answer": "same", ⏎   "explanation": "Doctrine ORM caches loaded entities within the EntityManager's identity map, so two find() calls with the same id return the same instance." ⏎ }

{ ⏎   "answer": 0, ⏎   "explanation": "persist() and remove() on the same detached object cancel each other, so no rows are inserted during flush." ⏎ }

```json ⏎ { ⏎   "answer": "1", ⏎   "explanation": "The count(x) function only counts non-NULL values in column x, so it returns 1." ⏎ } ⏎ ```

{"answer": "10,20,30", "explanation": "The window function sum(x) OVER (ORDER BY id) computes running totals of x in id order: id 1 -> 10, id 2 -> 30, id 3 -> 60, and string_agg concatenates the cast values as \"10,20,30\"."}

{"answer": "M1M2", "explanation": "The MessageBus executes middleware in the order provided, and each Trace middleware echoes its tag before passing the envelope to the next one, resulting in 'M1' followed by 'M2'."}

{ ⏎   "answer": "11", ⏎   "explanation": "Symfony Messenger dispatches messages to all handlers listed for a given message class, so both $d1 (+1) and $d2 (+10) execute, resulting in $n being 11." ⏎ }

{"answer": 1, "explanation": "The ON CONFLICT DO NOTHING clause prevents the duplicate insertion, leaving only one row in the temporary table."}

```json ⏎ {"answer": "2", "explanation": "Because the UNIQUE constraint is DEFERRABLE and INITIALLY DEFERRED, duplicate inserts are allowed within the transaction and only checked at COMMIT."} ⏎ ```

{"answer": 6, "explanation": "PHPUnit's --filter matches methods whose name contains 'test_sum', so it selects both data-provided test_sum methods (3 variants each, total 6), while excluding test_other."}

{"answer": "2, 1", "explanation": "The DataProvider provides two datasets, resulting in two tests being run, but the assertion fails for the negative number dataset."}

{"answer": "POST", "explanation": "The -d flag in curl sets the HTTP method to POST when no -X flag is explicitly specified."}

{"answer": "GET", "explanation": "The -G flag tells curl to put the -d data in the URL query string instead of the body, which changes the default POST to a GET request."}

{"answer": "invalid_client", "explanation": "Per RFC 6749 Section 4.1.2.1, if a client is not recognized or does not have a registered client_id, the token endpoint must respond with the error code \"invalid_client\"."}

{"answer": "Fragment", "explanation": "In the Implicit Grant flow (response_type=token), the authorization server returns the access token and other parameters in the fragment component of the redirect URI."}

{"answer": 0, "explanation": "In Twig the default filter is only applied when its argument is falsey, and since false is considered falsey in PHP, false|default(2) evaluates to 2, making 2*3 equal 6? Wait correction: Twig's default filter checks if the value is falsey; false is falsey so it returns 2, so 2*3=6, but wait: Actually in Twig, the default filter returns the default only if the variable is not defined, or in some versions if it is falsey, but false is falsey, so false|default(2) returns 2, so 2*3=6. I need to be precise. The Twig default filter docs say it replaces a value by another if it is falsey. False is falsey. So false|default(2) -> 2. Then 2 * 3 -> 6. So answer should be 6. Let me double-check: In PHP, false * 3 is 0, but Twig's default filter would replace false with 2 before multiplication. So 2*3 = 6. Yes, answer is 6. But I must ensure no off-by: The expression is {{ false|default(2) * 3 }}. Twig precedence: filter applies to false first, giving 2, then multiplied by 3, giving 6. So result is 6."}

{"answer": "Twig\\TwigException", "explanation": "The template engine throws a TwigException when encountering the invalid syntax of mixing a string literal with numbers using arithmetic operators."}

{ ⏎ "answer": 1, ⏎ "explanation": "Validating an empty string against a NotBlank constraint produces one violation, so the count is 1." ⏎ }

{ ⏎   "answer": "invalid", ⏎   "explanation": "Symfony form's isValid() returns false by default for a form that has not been bound with data and validated." ⏎ }

```json ⏎ {"answer": "same", "explanation": "The ContainerBuilder caches the resolved service instance, so both calls to $c->get('a') return the exact same object, making the spl_object_id comparison true."} ⏎ ```

{ ⏎   "answer": "hi Bob", ⏎   "explanation": "The ContainerBuilder resolves parameter placeholders during compile, replacing %name% and then %greeting% with their values." ⏎ }

{"answer": "992px", "explanation": "In Bootstrap 5.3, the .container class uses the --bs-container-max-width: 992px custom property for viewports at least 992px wide."}

{"answer": "text-primary", "explanation": "In HTML class lists, the last matching utility class for the same property generally overrides the previous one, so text-primary wins over text-danger for the text color."}

{"answer": 2, "explanation": "The Application layer using Domain (OrderService) and Infrastructure using Domain (Db) are the two dependency violations."}

{ ⏎   "answer": 2, ⏎   "explanation": "Domain is only allowed to depend on Domain, but this class references two classes from the Infrastructure layer (Db and Logger) and one from the Application layer (PlaceOrder), resulting in three total non-allowed dependencies; however, the question likely expects only violations of the 'Infrastructure -> Domain' rule if misinterpreted, but based on the rules Domain -> Domain only, all external references violate, so it should be 3." ⏎ }

{ ⏎   "answer": "10,15", ⏎   "explanation": "The readonly constructor property prevents mutation, and add() creates a new Money instance with the sum, so $a->amount stays 10 and $c->amount is 15." ⏎ }

{"answer": 1, "explanation": "remove() throws an exception when there is only one item, so 'a' is never unsetting and count remains 1."}

{"answer":"hi","explanation":"The object is instantiated and the hi() method returns the string 'hi', which is echoed."}

{ ⏎   "answer": "yesyes", ⏎   "explanation": "newLazyGhost returns an uninitialized lazy object; the closure assigns to $v which does not trigger initialization, so both isUninitializedLazyObject checks remain true." ⏎ }

{ ⏎   "answer": "no", ⏎   "explanation": "The Guard component was removed in Symfony 6.3 and is no longer available in Symfony 8.1." ⏎ }

{ ⏎   "answer": "noyes", ⏎   "explanation": "In Symfony 8.1, the deprecated AnnotationClassLoader is no longer available, so the first check returns 'no', while the new AttributeClassLoader is available, so the second check returns 'yes'." ⏎ }