Карта знаний PHP — bonsai-2:27b, run-19 · think: off

{ ⏎   "answer": "false", ⏎   "explanation": "Single-quoted and double-quoted strings differ in whether they undergo variable substitution and escape-sequence processing." ⏎ }

{"answer": "yes", "explanation": "The null coalescing operator (??) checks if the left operand is set and not null without raising a notice for undefined variables, unlike the ternary operator with isset()."}

{"answer":"ab","explanation":"The comma operator evaluates the first expression ('a'), then the second ('b'), and the last evaluated value is used for the print."}

{"answer": "no", "explanation": "In PHP, the print statement returns the string \"1\" (not the integer 1) and is a language construct that cannot be used as an expression like a function or variable."}

{"answer": "no", "explanation": "The Elvis operator returns its left operand when it is truthy, not falsy."}

{ ⏎   "answer": "yes", ⏎   "explanation": "The concatenation operator (.) has lower precedence than + and - in PHP, so a + b . c is evaluated as (a + b) . c." ⏎ }

{"answer": "yes", "explanation": "In PHP, the ** operator is right-associative, so 2 ** 3 ** 2 is evaluated as 2 ** (3 ** 2), which equals 2 ** 9 = 512, not (2 ** 3) ** 2 = 64."}

{"answer": "sum: 2", "explanation": "The string concatenation operator '.' has higher precedence than the addition operator '+', so it first concatenates the string 'sum: ' with the integer 2, and then attempts to add 3 to the resulting string 'sum: 2', which is coerced to 0, resulting in 'sum: 2' being printed."}

{ ⏎   "answer": "no", ⏎   "explanation": "Strict comparison of arrays requires them to have identical key/value pairs in the same order." ⏎ }

{ ⏎ "answer": "no", ⏎ "explanation": "0 == false is a loose comparison that returns true, not false." ⏎ }

{"answer": "no", "explanation": "In PHP 8, the loose comparison 'abc' == 0 returns false, as the comparison rules were changed so that a non-numeric string is not converted to a number when compared to a number."}

{"answer":"no","explanation":"In PHP loose comparison, null equals false and the empty string, but it is not equal to the integer 0."}

{"answer": 42, "explanation": "In PHP, casting a string to int takes the leading numeric value and ignores any trailing non-numeric characters, so (int) '42abc' evaluates to 42."}

{ ⏎   "answer": 10, ⏎   "explanation": "In PHP, the string '5' is converted to the integer 5, and the result of the addition is 10." ⏎ }

{"answer": "yes", "explanation": "In PHP, casting the boolean false to a string results in the string \"0\"."}

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

{"answer": "no", "explanation": "strrev() reverses bytes, not characters, so it will corrupt multi-byte UTF-8 characters."}

{"answer": "yes", "explanation": "The string 'Hello world' does contain the substring 'world'."}

{"answer": "no", "explanation": "str_pad() allows padding on the left, right, or both sides via the $pad_side parameter."}

{"answer": "no", "explanation": "The trim() function, by default, strips whitespace characters which include spaces, tabs, newlines, carriage returns, and null bytes."}

{ ⏎   "answer": 6, ⏎   "explanation": "The character 'é' is represented by 2 bytes in UTF-8, so 'héllo' contains 5 characters totaling 6 bytes." ⏎ }

{"answer": "def", "explanation": "The substr function with a negative start position counts from the end of the string, so starting at -3 of 'abcdef' returns the last three characters, 'def'."}

{"answer": "no", "explanation": "In PHP, strings are passed to functions by value, so ucfirst() returns a modified copy rather than modifying the original variable in place."}

{"answer": "no", "explanation": "Both heredoc and nowdoc support variable interpolation, with the main difference being that heredoc requires double quotes while nowdoc uses single quotes."}

```json ⏎ {"answer": "no", "explanation": "The sort() function reindexes the array with sequential numeric keys, thereby destroying the original key-to-value association (use ksort() or arsort() to sort by keys while preserving them)."} ⏎ ```

{ ⏎   "answer": "no", ⏎   "explanation": "In PHP, array keys are automatically cast to integers if they are numeric strings, but the key '5' itself is the string '5' before conversion, so it is not stored as the integer 5 by default." ⏎ }

{"answer": "no", "explanation": "The in_array() function uses loose comparison (==) by default, and you must set the third parameter to true to use strict comparison."}

{"answer": "yes", "explanation": "When array_filter() is called without a callback, it removes all elements that are falsy (e.g., 0, \"\", null, false)."}

{ ⏎   "answer": "no", ⏎   "explanation": "By default, array_slice() resets the array keys to sequential integers starting from 0, unless the preserve_keys parameter is explicitly set to true." ⏎ }

{"answer": "[20, 30]", "explanation": "array_slice extracts 2 elements starting from index 1 of the array [10, 20, 30, 40], returning [20, 30]."}

{"answer": 2, "explanation": "In PHP, the array addition operator (+) does not overwrite existing keys; it only adds new key-value pairs from the right-hand array."}

{"answer": "yes", "explanation": "PHP 8.1 introduced the array spread operator (which uses the same [] syntax) for merging arrays, and it supports both numeric and string keys."}

{ ⏎   "answer": "yes", ⏎   "explanation": "PHP syntax does not allow mixing named arguments with the spread operator ($args) in the same function call." ⏎ }

{ ⏎   "answer": "false", ⏎   "explanation": "By default, anonymous functions in PHP do not inherit the scope of the outer variable; you must explicitly pass them using the 'use' keyword or by relying on global variables with global()." ⏎ }

```json ⏎ {"answer": 3, "explanation": "func_num_args() returns the number of arguments actually passed to the function, which is 3 in this call."} ⏎ ```

{"answer": "false", "explanation": "The body of an arrow function must be a single expression unless a block body is used with braces and explicit return statements."}

{ ⏎   "answer": "yes", ⏎   "explanation": "Arrow functions in PHP use lexical scoping, meaning they automatically capture variables from the outer scope and maintain a reference to them rather than copying their values at the time of closure creation." ⏎ }

{ ⏎   "answer": "yes", ⏎   "explanation": "In PHP, static functions do not have a $this object, so any closure declared as static does not capture $this from its enclosing scope." ⏎ }

{ ⏎   "answer": 5, ⏎   "explanation": "The closure captures the value of $x at the time of its creation, not by reference." ⏎ }

```json ⏎ {"answer": "yes", "explanation": "In PHP weak typing mode, strings that represent integers are implicitly converted to integers when passed to int parameters."} ⏎ ```

```json ⏎ { ⏎   "answer": "yes", ⏎   "explanation": "Constructor property promotion is a PHP 8.0 feature that allows properties to be declared and assigned in the constructor parameters using visibility keywords." ⏎ } ⏎ ```

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

{ ⏎   "answer": "yes", ⏎   "explanation": "The final keyword prevents a method from being overridden by subclasses in PHP." ⏎ }

{ ⏎ "answer": "no", ⏎ "explanation": "Private properties in the parent class are not accessible from the child class and can only be accessed within the scope in which they are defined." ⏎ }

{"answer": "", "explanation": "Anonymous classes are assigned a generated name consisting of the class name followed by a NUL byte, so the portion before the NUL byte is an empty string."}

```json ⏎ { ⏎   "answer": "yes", ⏎   "explanation": "Private methods are not inherited, so a child class is free to declare a same-named method with any visibility without conflicting with the parent's private method." ⏎ } ⏎ ```

{"answer": "no", "explanation": "The __get() magic method is called only when you attempt to access a property that is not declared, inaccessible (private/protected), or has no value."}

{"answer": "Error", "explanation": "Reassigning a readonly property in PHP 8.1+ throws a readonly property modification exception, which is a subclass of Error."}

{"answer": "yes", "explanation": "PHP interfaces can declare constants, which must be public, immutable, and initialized with a literal value."}

{ ⏎   "answer": "instanceof", ⏎   "explanation": "In PHP, the 'instanceof' operator checks if an object is an instance of a particular class or implements a specific interface." ⏎ }

{"answer": "no", "explanation": "Interfaces can only declare abstract methods and constants, as they cannot contain method implementations or static methods."}

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

{ ⏎   "answer": "yes", ⏎   "explanation": "PHP 8.1 introduced default implementations for methods in interfaces using the `abstract` keyword for methods without a body." ⏎ }

{"answer": "yes", "explanation": "Abstract methods in PHP can have public, protected, or private visibility."}

{"answer": 3, "explanation": "The static method cases() on an enum returns all its defined cases, and there are exactly three cases (A, B, and C)."}

{ ⏎ "answer": "yes", ⏎ "explanation": "PHP traits support the declaration of class constants, which can be accessed from the using class." ⏎ }

{"answer": "yes", "explanation": "In PHP, both Exception and Error classes inherit from the Throwable interface, making it their common ancestor."}

{"answer": "yes", "explanation": "In PHP, the TypeError class extends the built-in Exception class, so any code catching Exception will automatically catch TypeError as well."}

{"answer": "yes", "explanation": "The @ operator in PHP suppresses most runtime notices, warnings, and deprecations, effectively acting as a simple error suppression mechanism, though it is discouraged in modern development."}

{ ⏎   "answer": "DivisionByZeroError", ⏎   "explanation": "In PHP 7.0+, the intdiv function with a zero divisor throws a DivisionByZeroError." ⏎ }

{"answer": "no", "explanation": "The finally block executes regardless of whether the exception is caught or the try block completes normally."}

{"answer": "yes", "explanation": "An exception thrown in a finally block propagates out of the try-finally construct and masks any prior exception, effectively altering the outcome of the try block."}

{"answer": "yes", "explanation": "In PHP, any object instance is cast to boolean true, so (bool) new Exception('x') evaluates to true."}

{ ⏎   "answer": "yes", ⏎   "explanation": "Functions registered via register_shutdown_function() run when the script exits normally, including when exit() is called, unless the script is terminated abruptly by a fatal error or an exit code set in a way that prevents them from running." ⏎ }

{ ⏎   "answer": "no", ⏎   "explanation": "The `use` statement is a compile-time alias that does not trigger autoloaders or load class files; it is typically executed during compilation or runtime before any instantiation occurs." ⏎ }

{"answer": "function", "explanation": "In PHP's namespace import syntax, you use the 'use' statement followed by the 'function' keyword to import a function, whereas 'const' is used for importing constants or classes."}

{"answer":"src/Controller/Api/UserController.php","explanation":"PSR-4 autoloading converts backslashes in the namespace to directory separators, mapping App\\Controller\\Api\\UserController to src/Controller/Api/UserController.php."}

{"answer": "yes", "explanation": "Including vendor/autoload.php registers autoloader adapters (such as classmap and PSR-4) via spl_autoload_register()."}

{"answer": "no", "explanation": "__NAMESPACE__ is a magic constant that resolves to the name of the namespace it is defined in, not a magic constant that contains it by name in the way stated."}

{"answer": "no", "explanation": "An unqualified class name in `new` is resolved using the current namespace, and only if not found in that namespace does it fall back to the global root."}

{ ⏎ "answer": "yes", ⏎ "explanation": "PSR-4 requires the namespace subdirectory structure to mirror the class hierarchy, so App\\Model\\User maps to src/Model/User.php." ⏎ }

{"answer":"yes","explanation":"In PHP, use statements can be placed inside a function, class, or namespace, and in a function the import is scoped to that function body."}

{"answer": "no", "explanation": "Arrays in PHP are copied on assignment, so this statement is true."}

{"answer": 2, "explanation": "In PHP, assigning one array to another creates a copy (copy-on-write), so modifying $b with $b[] = 3 does not affect $a, which still contains two elements."}

{"answer": "yes", "explanation": "Variables defined in the global scope are not visible inside a function unless accessed via the global keyword, the $GLOBALS array, or passed explicitly as parameters."}

{ ⏎   "answer": "yes", ⏎   "explanation": "unset() on a global array element removes the variable from the global scope, not just for that function." ⏎ }

{"answer": "6", "explanation": "The function inc modifies $n by reference, incrementing it from 5 to 6."}

{"answer": "false", "explanation": "A foreach loop over an array by value operates on a copy of the array, so changes made to the array inside the loop do not affect the original array."}

{ ⏎   "answer": "no", ⏎   "explanation": "Static properties are shared among all instances of a class, so changes in one instance are visible in all others." ⏎ }

{ ⏎   "answer": "false", ⏎   "explanation": "PHP arrays do not allow boolean keys; only integers and strings can be used as array keys." ⏎ }

{"answer": "yes", "explanation": "Since PHP 7.2, generators support a 'yield from' style return value via the 'return' statement inside the generator function, which is accessible via the 'getReturn()' method on the Generator object."}

{"answer": "yes", "explanation": "In PHP, a fully consumed generator can be rewound and traversed again by calling the rewind() method on it."}

{"answer": "yes", "explanation": "The yield from construct in PHP is used to delegate traversal to another generator or iterable, effectively flattening a generator of generators."}

```json ⏎ {"answer": "Generator", "explanation": "In PHP, calling a generator function returns a Generator object, so get_class(g()) returns 'Generator'."} ⏎ ```

{"answer": 3, "explanation": "The generator yields three elements (1, 2, and 3) which are all included in the resulting array."}

{ ⏎ "answer": "yes", ⏎ "explanation": "The SplStack class in PHP implements a LIFO (Last-In, First-Out) stack, not a FIFO queue." ⏎ }

{"answer": "yes", "explanation": "ArrayIterator is a built-in PHP class that provides a standard way to iterate over arrays using the Iterator interface."}

{ ⏎   "answer": "no", ⏎   "explanation": "ArrayObject is traversable and can be used with the foreach statement." ⏎ }

{"answer": "yes", "explanation": "Yes, password_hash() automatically generates and stores a unique salt with the password hash, so there is no need to pass a separate salt argument."}

{"answer": "no", "explanation": "PASSWORD_DEFAULT in PHP uses the bcrypt algorithm (or a better alternative if available), not md5."}

{ ⏎   "answer": "true", ⏎   "explanation": "The password_verify function compares the given password to the hash and returns true if the password matches the hash." ⏎ }

{"answer": "no", "explanation": "strip_tags() is used for removing HTML tags from a string and is unrelated to preventing SQL injection."}

{"answer": "yes", "explanation": "session_regenerate_id() generates a new session ID and invalidates the old one, which is the standard method for protecting against session fixation attacks."}

{ ⏎   "answer": "php_sapi_name", ⏎   "explanation": "The php_sapi_name() function returns the name of the current SAPI (Server API) module, such as \"cli\", \"apache2handler\", etc." ⏎ }

{"answer": "yes", "explanation": "session_destroy() removes the session data from the server's storage, but it does not automatically delete the session cookie from the user's browser."}

{ ⏎   "answer": "no", ⏎   "explanation": "The $_SESSION array is not automatically populated; you must call session_start() to initialize the session." ⏎ }

{"answer": "PHP 8.4", "explanation": "array_find() was introduced in PHP 8.4."}

{ ⏎   "answer": "no", ⏎   "explanation": "Property hooks (get/set in property declarations) landed in PHP 8.3, not PHP 8.4." ⏎ }

{"answer": "yes", "explanation": "Asymmetric visibility (e.g. public private(set) string $name) was introduced in PHP 8.4."}

{ ⏎   "answer": "8.0", ⏎   "explanation": "The #[\\NoDiscard] attribute was introduced in PHP 8.0 to indicate that the return value of a function should not be discarded." ⏎ }

{"answer": "8.1", "explanation": "The pipe operator (|>) for pipelines was introduced in PHP 8.1."}

{"answer": "8.4", "explanation": "Clone-with was introduced in PHP 8.4."}

{ ⏎   "answer": "8.3", ⏎   "explanation": "array_first() and array_last() were introduced in PHP 8.3." ⏎ }

{"answer": "8.4", "explanation": "RFC Partial Function Application v2 (RFC 3033) was accepted for PHP 8.4."}

{"answer":"8.1","explanation":"The clamp() function was introduced in PHP 8.1."}

{ ⏎   "answer": "no", ⏎   "explanation": "RFC Context Managers v2 was not adopted in PHP as of November 7, 2026." ⏎ }

{ ⏎   "answer": "yes", ⏎   "explanation": "The proposal for RFC Bound-Erased Generic Types was indeed declined during the PHP 8.4.0 planning phase in 2026." ⏎ }

{ ⏎   "answer": "no", ⏎   "explanation": "As of PHP 8.3 and the roadmap through PHP 9.0 (late 2026), there is no accepted or scheduled RFC to make ZTS (Zend Thread Safety) the default threading model for PHP; ZTS remains an optional build variant." ⏎ }

{"answer": "yes", "explanation": "PHP 8.5 does not include support for generics or parameterized types, which remain an unresolved feature request."}

{ ⏎   "answer": "yes", ⏎   "explanation": "As of 2026-11-07, PHP 8.5 is the latest stable release, with PHP 8.6 scheduled for general availability on 2026-11-19." ⏎ }

{"answer": "yes", "explanation": "PHP 6 was officially canceled, so PHP 7.0 became the next major version after PHP 5.x."}

{ ⏎   "answer": "yes", ⏎   "explanation": "The RFC for adding the #[\\Deprecated] attribute was adopted for PHP 8.0." ⏎ }

{"answer": "yes", "explanation": "The dependency rule in clean and onion architecture mandates that dependencies point inward, meaning inner layers have no knowledge of outer layers."}

{ ⏎   "answer": "yes", ⏎   "explanation": "Domain entities in DDD are pure PHP classes that should not depend on frameworks or ORMs like Symfony or Doctrine." ⏎ }

{"answer": "yes", "explanation": "In layered architecture, the presentation layer (controllers and views/templates) is the business-logic layer that invokes use cases, which then call domain services and repositories."}

{ ⏎   "answer": "Use case", ⏎   "explanation": "In the Onion architecture, the core business rules and use cases sit at the very center, with the interface, data access, and presentation layers arranged around it." ⏎ }

{ ⏎   "answer": "yes", ⏎   "explanation": "Static analysis tools like deptrac can automatically enforce architectural boundaries by detecting forbidden dependencies between layers." ⏎ }

{"answer": "no", "explanation": "Use cases should generally avoid direct dependencies on HTTP or ORM objects to maintain loose coupling and ease of testing."}

{"answer": "repository", "explanation": "In the Domain-Driven Design and Entity-Relationship patterns, a repository is the interface used to encapsulate data access and storage details, exposing a collection of entities to the domain layer."}

{"answer": "yes", "explanation": "In clean architecture, the domain and use cases are independent of infrastructure details, so database swaps only affect the outer boundary layers."}

{ ⏎   "answer": "no", ⏎   "explanation": "In DDD, an aggregate is a cluster of domain objects with a single identity and consistency boundary, which is a domain concept distinct from a physical database table." ⏎ }

{ ⏎   "answer": "yes", ⏎   "explanation": "In Domain-Driven Design, a Value Object is defined by its attributes (value) rather than a unique identity, and it is typically immutable to ensure its state remains consistent throughout its lifecycle." ⏎ }

{"answer": "Aggregate root", "explanation": "In Domain-Driven Design, the aggregate root is the single external entry point for an aggregate through which all modifications are made."}

{"answer": "yes", "explanation": "In DDD, repositories manage aggregates and are typically declared for the root entity, not individual entities within the aggregate."}

{ ⏎   "answer": "yes", ⏎   "explanation": "Ubiquitous language is a concept from Domain-Driven Design that emphasizes the need for a shared language between the development team and domain experts." ⏎ }

{"answer": "The boundary of a language model's training data or domain, often referred to as the model's 'knowledge cutoff' or 'validity domain', within which its predictions are consistent and outside of which the same inputs may yield different or invalid outputs depending on the model.", "explanation": "The question describes the limit of a model's learned knowledge or intended application area, which is often defined by its training data or specific domain of use."}

{ ⏎   "answer": "no", ⏎   "explanation": "DDD recommends Rich Domain Models (anemic models are considered bad practice) where behavior and logic reside within the domain entities themselves rather than in separate services." ⏎ }

{"answer": "yes", "explanation": "In Domain-Driven Design, a bounded context ensures that the meaning of a domain concept is unambiguous within its scope, meaning the same term can refer to different models or classes in different contexts."}

{ ⏎   "answer": "yes", ⏎   "explanation": "Symfony's Dependency Injection container instantiates services lazily (by default), meaning they are not created until they are first requested or resolved." ⏎ }

{ ⏎   "answer": "route:list", ⏎   "explanation": "The built-in Symfony console command route:list displays all the registered routes." ⏎ }

{"answer": "no", "explanation": "Symfony's autowiring system automatically detects and wires services based on their type and constructor arguments without requiring manual declaration for most standard services."}

{ ⏎   "answer": "yes", ⏎   "explanation": "The Twig engine compiles templates into PHP templates, which are then compiled into classes and cached in a directory to improve performance." ⏎ }

{ ⏎   "answer": "yes", ⏎   "explanation": "The Symfony development container is cached and rebuilt only when the environment changes, not on every request." ⏎ }

{"answer": "SYMFONY_ENV", "explanation": "The active Symfony environment is selected by the SYMFONY_ENV environment variable."}

{"answer": "no", "explanation": "Symfony routing requires controller actions to be public methods to be invoked by the framework."}

{ ⏎   "answer": "false", ⏎   "explanation": "In PHP's PSR-12 (and common event architecture), 'subscribers' and 'listeners' are often used interchangeably for the same component type, and there is no inherent priority given to one over the other by the interface." ⏎ }

{"answer": "yes", "explanation": "The legacy Guard system was removed in Symfony 5.0 in favor of the new Security component using AuthenticatorInterface."}

{"answer": "IsGranted", "explanation": "Symfony uses the IsGranted attribute to check permissions and returns a 403 error if the required role or permission is missing."}

{ ⏎   "answer": "yes", ⏎   "explanation": "The Symfony Access Checker uses voters to determine permission checks, and the isGranted method accepts a role and an object as arguments." ⏎ }

{"answer": "no", "explanation": "While PHP attributes are the recommended and supported method for validation constraints, Doctrine annotations are not entirely unsupported in modern Symfony; they are simply deprecated and will be removed in future versions, meaning they are not strictly 'no longer supported' yet."}

{"answer": "yes", "explanation": "Symfony's forms automatically generate and validate CSRF tokens on submission by default for security purposes."}

{"answer": "yes", "explanation": "Symfony enforces server-side form validation as the final security check, ensuring data integrity and validation even after client-side HTML5 checks pass."}

{"answer": "php bin/console make:form", "explanation": "This command generates a FormType class in a Symfony project."}

{"answer": "no", "explanation": "Symfony stores passwords using salted hashing algorithms, not plain text."}

{ ⏎   "answer": "yes", ⏎   "explanation": "In Symfony 4 and later, it is a standard convention to place bundle configuration in separate PHP files under config/packages, such as doctrine.yaml or webapp.yaml." ⏎ }

{"answer": "no", "explanation": "In the described setup, it is the real secrets (.env.local) that are non-committed, not the dev defaults file."}

{"answer": "bin/console debug:container", "explanation": "This command displays all registered services and their aliases in the Symfony service container."}

{ ⏎   "answer": "no", ⏎   "explanation": "The Symfony container is immutable and frozen after construction, so you cannot change parameters at runtime using setParameter()." ⏎ }

{"answer": "yes", "explanation": "By default, Symfony services are public and can be directly fetched from the container unless explicitly marked as private."}

{ ⏎   "answer": "no", ⏎   "explanation": "Bundles do not require a configuration file to function, as they can use default settings and be configured through services or parameters if needed." ⏎ }

{"answer": "yes", "explanation": "Symfony's config system supports environment variable interpolation using the %env(VAR)% syntax in configuration files like services.yaml."}

{ ⏎   "answer": "APP_DEBUG", ⏎   "explanation": "The APP_DEBUG environment variable controls whether Symfony runs in debug mode, which activates the debug toolbar and profiler features." ⏎ }

{"answer": "no", "explanation": "A single message in Symfony Messenger can be handled by multiple handlers, which are executed in a specific order."}

{"answer": "no", "explanation": "The synchronous transport does not queue the message; it executes it immediately within the current process."}

{"answer": "bin/console messenger:consume", "explanation": "This Symfony console command starts a worker process that consumes and processes messages from the Messenger queue."}

{ ⏎   "answer": "yes", ⏎   "explanation": "In Symfony's Messenger component, retry strategies are configured at the transport level, specifically within the transport's DSN configuration." ⏎ }

{"answer": "yes", "explanation": "In Symfony Messenger, if no serializer is configured or specified, the default behavior is to serialize messages to JSON."}

{"answer": "yes", "explanation": "Symfony Scheduler is designed to dispatch scheduled jobs through Symfony Messenger, making the statement true."}

{"answer": "database", "explanation": "The 'database' transport in the Symfony Messenger component uses Doctrine DBAL to store messages in database tables."}

{"answer": "yes", "explanation": "Symfony Messenger's middleware system allows developers to add custom handlers that can be inserted at any position in the pipeline."}

{ ⏎ "answer": "no", ⏎ "explanation": "The statement is false because Symfony releases follow a different cycle: major versions occur annually (e.g., 5.0 in November 2021, 6.0 in November 2022), while minor releases occur every six months." ⏎ }

{"answer": "8.1", "explanation": "Symfony 8 requires a minimum PHP version of 8.1."}

{ ⏎   "answer": "yes", ⏎   "explanation": "Symfony 7.0 supports using docblock annotations for features like routing and validation, although attributes are recommended for new code." ⏎ }

{ ⏎   "answer": "no", ⏎   "explanation": "AssetMapper is a Symfony component for managing static assets that relies on a separate build process (like Node.js/Webpack) to generate the mapping file, rather than handling everything dynamically through a single importmap.php file." ⏎ }

{"answer": "yes", "explanation": "Symfony 6.4 is a minor release within the 6.x branch and does not have the extended support period (LTS) that even-numbered releases like 6.0 or 6.2 would receive."}

{ ⏎   "answer": "no", ⏎   "explanation": "Symfony removes deprecations introduced in the previous major version when it releases the next major version." ⏎ }

{"answer": "yes", "explanation": "Symfony provides an official Upgrade guide for each major version release to document the changes and deprecations."}

```json ⏎ { ⏎   "answer": "AssetMapper", ⏎   "explanation": "Symfony provides a dedicated AssetMapper component that handles assets and importmap without requiring Node.js or Webpack." ⏎ } ⏎ ```

{"answer": "no", "explanation": "As of 2026-11-07, Symfony 8.2 has not been released; Symfony follows a biannual minor release cycle where 8.2 would not exist until at least May 2027 or later, depending on the release schedule."}

{"answer": "yes", "explanation": "Symfony releases a minor version every six months, with 8.2 scheduled for November 2026."}

{ ⏎   "answer": "8.2", ⏎   "explanation": "Symfony typically releases a new minor version (incrementing the patch) after each major version, so 8.2 follows 8.1." ⏎ }

{ ⏎ "answer": "no", ⏎ "explanation": "Symfony 8 is not a major release requiring applications to be rewritten, as Symfony adheres to the 6-month cycle and deprecations to ensure backward compatibility for major versions." ⏎ }

{ ⏎   "answer": "no", ⏎   "explanation": "While PHP major versions generally maintain backward compatibility, there are specific breaking changes, deprecated functions, and changes to behavior in PHP 8.2 that may require code updates or adjustments." ⏎ }

{"answer": 8.1, "explanation": "Symfony 8.1 is the minor release immediately preceding the major Symfony 9.0 release in the Symfony major versioning scheme."}

{"answer": "yes", "explanation": "Symfony 8.2 requires PHP 8.5 as its minimum PHP version requirement, meaning PHP must be upgraded when upgrading Symfony."}

{"answer": "yes", "explanation": "Symfony aims to introduce deprecations early, typically in 8.x, with the promise that they will remain until 9.0."}

{"answer": "false", "explanation": "Twig does not allow direct access to arbitrary PHP code or functions for security reasons, as it uses a templating engine with a sandboxed set of features."}

{"answer": "yes", "explanation": "Twig has auto-escaping enabled by default in its standard configuration."}

{ ⏎   "answer": "yes", ⏎   "explanation": "The |e (or |escape) filter escapes a variable or string using HTML escaping to prevent security issues such as cross-site scripting (XSS)." ⏎ }

```json ⏎ { ⏎   "answer": "intl_numberformat", ⏎   "explanation": "The twig/intl-extra package provides the intl_numberformat filter to format numbers according to a specified locale." ⏎ } ⏎ ```

{"answer": "yes", "explanation": "In Twig templates, the |raw filter (or the {{ ...|raw }} syntax) is used to output a variable without HTML auto-escaping, which can be dangerous if the data is not trusted."}

{"answer": "yes", "explanation": "In Twig, double braces {{ }} are used to render expressions, while curly braces with percent signs {% %} are used to execute template tags like loops and conditionals."}

{"answer": "no", "explanation": "Twig templates can declare and assign variables using the {% set %} tag."}

{ ⏎ "answer": "dump", ⏎ "explanation": "The dump function in Twig outputs the debug structure of a variable." ⏎ }

{"answer": "yes", "explanation": "Bootstrap is a front-end library providing CSS/JS UI components rather than a single-page application (SPA) framework."}

{ ⏎   "answer": "container-fluid", ⏎   "explanation": "The 'container-fluid' class provides a responsive full-width container that expands to the width of the parent, while classes like 'container' provide a fixed max width per breakpoint." ⏎ }

{"answer": "yes", "explanation": "In older versions of Bootstrap (up to v3), the grid was indeed based on CSS floats and used a 12-column structure, not 16 columns, but the question states 16 columns which is incorrect for Bootstrap's standard grid; however, if this is a trick question about a non-standard claim, the statement is false. Let me correct: Bootstrap grid is built on CSS floats in earlier versions but splits into 12 columns, not 16, so the statement is false."}

{ ⏎   "answer": "yes", ⏎   "explanation": "Bootstrap 5 defines the named breakpoints sm, md, lg, xl, and xxl for its responsive grid classes." ⏎ }

```json ⏎ {"answer": "yes", "explanation": "In Bootstrap, utility classes like .mt-3 and .px-2 derive their padding and margin values directly from the $spacing map, which is a multiple of the root $spacer variable."} ⏎ ```

{"answer":"data-bs-toggle", "explanation":"In Bootstrap 5, the data-bs-toggle attribute is the standard data attribute used to initialize and enable interactive components like dropdowns and modals on elements."}

{ ⏎   "answer": "yes", ⏎   "explanation": "Bootstrap 5 removed its dependency on jQuery and provides its own vanilla JavaScript for component functionality." ⏎ }

{"answer": "yes", "explanation": "In Bootstrap 5, dark mode is enabled by adding the `.dark` class to the root element (like `body` or `html`)."}

{ ⏎   "answer": "no", ⏎   "explanation": "Doctrine ORM does not automatically create database tables at runtime; instead, developers must explicitly run a schema management or migration tool to create or alter tables." ⏎ }

```json ⏎ {"answer": "persist", "explanation": "The persist() method marks a new object as managed without executing SQL until flush()." ⏎ } ⏎ ```

{ ⏎   "answer": "yes", ⏎   "explanation": "In Doctrine ORM, the merge() method returns a managed instance of the passed entity, which is the equivalent of creating a new managed entity or re-attaching a detached one." ⏎ }

{"answer": "yes", "explanation": "Data Query Language (DQL) queries target domain models and entities rather than the underlying database schema."}

{"answer": "null", "explanation": "In typical PHP database patterns, if no record is found, the result is null or an empty value, depending on the specific implementation, but null is the standard return."}

{ ⏎ "answer": "no", ⏎ "explanation": "DoctrineBundle does not automatically call flush() at the end of every request; it requires explicit flushing or the use of the Symfony 5.3+ auto-flush feature via configuration." ⏎ }

{"answer": "no", "explanation": "In Doctrine ORM, a managed entity must first be associated with a persistent entity (e.g., via a relation) before it becomes 'managed' and its changes are tracked by the Unit of Work; merely calling flush() after modifying a property on an unmanaged or newly instantiated entity will not commit the change because it was never registered with the EntityManager."}

{"answer": "no", "explanation": "The remove() method in Doctrine's ORM (Doctrine\\ORM\\EntityManagerInterface) deletes entities from the EntityManager's Unit of Work but does not immediately execute the SQL DELETE statement; the actual DELETE query is generated and executed only when the flush() method is called."}

{"answer": "no", "explanation": "PostgreSQL's MVCC allows concurrent reads and writes, so readers and writers do not block each other."}

{ ⏎   "answer": "EXPLAIN", ⏎   "explanation": "The EXPLAIN command displays the execution plan of a SQL statement without actually executing the data operation." ⏎ }

{"answer": "false", "explanation": "While related, SERIAL is a syntactic sugar that creates a specific sequence and default constraint, whereas GENERATED ... AS IDENTITY is a newer SQL standard clause for column identity that works differently with ALTER TABLE and other databases."}

{ ⏎   "answer": "no", ⏎   "explanation": "By default, PostgreSQL treats NULL values as distinct from each other, allowing multiple rows to contain NULL in a column with a UNIQUE constraint." ⏎ }

{"answer": "string_agg", "explanation": "The string_agg() function is used to concatenate strings with an optional separator in PostgreSQL."}

{ ⏎   "answer": "yes", ⏎   "explanation": "In PostgreSQL, a VACUUM command without the FULL option does not return free space to the operating system; it merely makes it available for reuse within the table." ⏎ }

{"answer": "PARTITION BY", "explanation": "The PARTITION BY clause divides the result set into partitions, over which each window function is computed independently."}

{"answer": "no", "explanation": "READ COMMITTED does not protect against non-repeatable reads; it only ensures that data read within a single statement is from a consistent snapshot at the start of that statement, so a subsequent re-read in the same transaction can see different values if another transaction committed changes in the meantime."}

{"answer": "yes", "explanation": "PostgreSQL operates in autocommit mode by default, meaning each individual SQL statement is automatically committed as its own transaction unless a user explicitly starts a multi-statement transaction using BEGIN/COMMIT."}

{"answer": "COMMIT", "explanation": "COMMIT is the SQL command used to permanently save all changes made within a transaction to the database."}

{ ⏎   "answer": "yes", ⏎   "explanation": "Indexes improve the performance of UPDATE and DELETE operations when they involve searching for rows based on an indexed column by allowing the database to locate the target rows quickly without scanning the entire table." ⏎ }

{"answer": "yes", "explanation": "SAVEPOINT in PostgreSQL creates a named checkpoint within a transaction that can be used to roll back specific operations without discarding the entire transaction."}

{ ⏎   "answer": "no", ⏎   "explanation": "In PostgreSQL, EXPLAIN ANALYZE actually executes the query to gather real statistics about execution time, so it does execute the query." ⏎ }

```json ⏎ { ⏎   "answer": "pgvector", ⏎   "explanation": "pgvector is the PostgreSQL extension that provides vector data types, distance operators, and index types (like HNSW and IVFFLAT) for vector search and embedding similarity matching." ⏎ } ⏎ ```

{"answer": "yes", "explanation": "Partial indexes, or filtered indexes, only index rows that meet the specified WHERE condition, reducing size and potentially improving query performance."}

{"answer": "yes", "explanation": "The SERIALIZABLE isolation level in PostgreSQL is implemented by preventing write conflicts through row locks taken when a transaction reads data, which is a form of Serializable Snapshot Isolation (SSI)."}

{"answer": "yes", "explanation": "HTTP status 201 indicates that the request has successfully created a new resource."}

{"answer": 204, "explanation": "Status 204 No Content indicates a successful request where the server is intentionally not sending a response body."}

{ ⏎   "answer": "yes", ⏎   "explanation": "The DELETE method is defined as idempotent in the HTTP specification, meaning multiple identical requests have the same effect as a single request, and no additional effect from repeated calls." ⏎ }

{"answer": "no", "explanation": "The Access-Control-Allow-Origin header is sent by the server, not the client, to indicate which origins are permitted to make cross-origin requests."}

{"answer": "yes", "explanation": "HTTP status 429 is specifically defined for indicating that a client is making too many requests within a given time frame, typically due to rate limiting."}

{"answer": "no", "explanation": "5xx codes indicate a server-side error, while 4xx codes indicate a client error."}

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

{ ⏎   "answer": "no", ⏎   "explanation": "RFC 5789 explicitly states that clients should use PATCH for non-idempotent operations, implying that unlike PUT, it does not require idempotency." ⏎ }

{ ⏎   "answer": "no", ⏎   "explanation": "Plain equality comparison can be vulnerable to timing attacks, so a timing-safe comparison function like hash_equals() should be used instead." ⏎ }

{"answer": "yes", "explanation": "CSRF protection typically involves the server issuing a token tied to the user's session and verifying it on the server-side for state-changing requests."}

{ ⏎   "answer": "Content-Security-Policy", ⏎   "explanation": "The Content-Security-Policy header is used to specify the set of resources allowed to be loaded by the page." ⏎ }

{ ⏎   "answer": "no", ⏎   "explanation": "OAuth 2.0 is an authorization framework, not an authentication protocol; it grants access to resources rather than identifying who the user is." ⏎ }

{"answer": "no", "explanation": "Input validation on the server prevents data tampering and other attacks, but XSS specifically requires output encoding or sanitization when data is rendered in a browser to be prevented effectively."}

{"answer": "code", "explanation": "In the OAuth 2.0 authorization code flow, the 'code' parameter is appended to the redirect URI after user authorization and is exchanged at the token endpoint for the access token."}

```json ⏎ { ⏎   "answer": "yes", ⏎   "explanation": "This statement accurately describes the purpose and typical lifespan of a refresh token in OAuth 2.0." ⏎ } ⏎ ```

{"answer": "no", "explanation": "Salt values are typically stored in plaintext alongside the password hash in the database to allow for verification during login."}

{"answer": "no", "explanation": "PHPUnit requires test methods to be within a class that extends PHPUnit\\TestCase to be properly integrated with the framework."}

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

{ ⏎   "answer": "no", ⏎   "explanation": "Data providers in PHP can be used to supply multiple sets of arguments for a single test to run against, not just exactly one." ⏎ }

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

{ ⏎   "answer": "no", ⏎   "explanation": "The statement is reversed: a stub returns predefined data without verifying calls, while a mock verifies expected method calls." ⏎ }

{"answer": "yes", "explanation": "PHPUnit 10 introduced data provider attributes as the recommended approach, deprecating the legacy @dataProvider annotation."}

{ ⏎   "answer": "yes", ⏎   "explanation": "PHPUnit enforces that test cases must be independent, meaning a test should not depend on the state or result of another test to ensure reliability." ⏎ }

{"answer": "--randomly-order", "explanation": "The --randomly-order option in PHPUnit's command line ensures that tests are executed in a random sequence."}

{"answer": "3-4", "explanation": "intdiv(7, 2) returns 3 and intdiv(-7, 2) returns -4, which are concatenated into the string \"3-4\"."}

{ ⏎ "answer": -9, ⏎ "explanation": "In PHP, the exponentiation operator ** has higher precedence than the unary minus operator, so -3 ** 2 is evaluated as -(3 ** 2), which equals -9." ⏎ }

{"answer":"true","explanation":"In PHP, both '1e1' and '10' are cast to the numeric 10 during the loose comparison, so they are equal."}

{"answer": "other", "explanation": "In PHP, switch uses loose comparison (==), so the string 'a' does not match the integer 0, and it falls through to the default case."}

```json ⏎ { ⏎   "answer": "1bc", ⏎   "explanation": "strtr with an associative array replaces matching substrings, and when multiple patterns match, the longer pattern 'ab' is replaced first with '2', leaving 'c', but since 'a' is replaced first with '1' giving '1bc', the output is '1bc'." ⏎ } ⏎ ```

{ ⏎   "answer": "hello", ⏎   "explanation": "substr() returns the substring from the specified position, and since the start index is beyond the string length, it returns the whole string." ⏎ }

{"answer": "k,n,m", "explanation": "The + operator merges arrays keeping left values, so keys are k, n, m."}

```json ⏎ {"answer": "xzy", "explanation": "The array is sorted by its third element using usort and the spaceship operator, then the second element of each sorted sub-array is extracted and concatenated."} ⏎ ```

{"answer": 4, "explanation": "The spread operator expands the named arguments array into the function call, mapping 'a' => 5 and 'b' => 1, so f(5, 1) returns 5 - 1 = 4."}

{ ⏎   "answer": "Error", ⏎   "explanation": "The code will result in a PHP error because `$f = $p->g(...)` uses an undefined variable or incorrect syntax for variable assignment in this context." ⏎ }

```json ⏎ {"answer": "B", "explanation": "The late static binding with static::class inside class A, when called on an instance of the child class B, returns the name of the actual class B."} ⏎ ```

{"answer": "no", "explanation": "PHP 8.5 does not yet support property accessors (get/set); this syntax is only planned for PHP 9.0, so the code throws a parse error."}

{"answer": "BA", "explanation": "The 'insteadof' alias makes TB::f override TA::f as f, and 'as g' aliases TA::f as g, so f() returns B and g() returns A."}

{"answer": 1, "explanation": "Static properties in a trait are not separate per class but are shared, so setting CX::$n also affects CY::$n."}

{"answer": "no", "explanation": "The code outputs an error because a finally block cannot return, so it triggers a fatal exception rather than displaying the return value."}

{ ⏎   "answer": "second", ⏎   "explanation": "The inner finally block throws a LogicException, which propagates out of the try block and is caught by the outer catch block." ⏎ }

{"answer":"Error","explanation":"\\Baz::class fails with a fatal error because no class named Baz is defined in the global namespace, while App\\Foo::class resolves to N\\Baz::class."}

{ ⏎   "answer": "yesno", ⏎   "explanation": "class_exists('Foo') returns false because the class is in namespace Ns, while class_exists(__NAMESPACE__.'\\'. $c) returns true, so the concatenation produces 'yes' followed by 'no'." ⏎ }

{"answer": "99,2,3", "explanation": "The foreach loop makes $v a reference to each element, and after the loop it remains a reference to the last element, so assigning $v = 99 changes $a[2] to 99."}

{"answer": 3, "explanation": "The static variable $n is shared between all instances of A and its subclasses, so after three calls to inc() it increments from 0 to 1, 2, and then 3."}

{"answer": "11", "explanation": "The generator yields 1, and when send(10) is called, $x becomes 10, so the return value is 10+1=11."}

```json ⏎ { ⏎   "answer": "1,ok", ⏎   "explanation": "yield from returns the return value of the inner generator ('ok'), and since it's the only value yielded after 1 and 2, the output is 1,ok." ⏎ } ⏎ ```

{ ⏎ "answer": "yesno", ⏎ "explanation": "The first call returns false because cost 4 matches, and the second returns true because cost 5 is higher, so the output is 'yesno'." ⏎ }

{"answer": "strict-in", "explanation": "E_ALL includes the E_ERROR flag (2), which is set, so (E_ALL & 2048) is non-zero, making the ternary evaluate to 'strict-in'."}

```json ⏎ {"answer": "mapped", "explanation": "Symfony's Request headers automatically convert underscored headers to hyphenated ones when getting by name, so get('X-Token') retrieves the HTTP_X_TOKEN value."} ⏎ ```

{"answer": "BCA", "explanation": "Listeners are invoked in order of priority, where a lower number means higher priority, so the listeners run in the order 5, 10, and default."}

{"answer": "same", "explanation": "Doctrine ORM's EntityManager maintains an identity map within a unit of work, so two find() calls with the same identifier return the same object instance."}

{"answer": 0, "explanation": "remove() cancels the persist, so flush() does not insert the row."}

```json ⏎ { ⏎   "answer": 1, ⏎   "explanation": "COUNT(column) counts non-null values in that column, so counting x (which has one NULL) returns 1." ⏎ } ⏎ ```

{ ⏎   "answer": "10,20,30", ⏎   "explanation": "The window function sums the x values in cumulative order by id, producing 10, 20, and 30, which string_agg then concatenates with commas." ⏎ }

{ ⏎   "answer": "M1M2", ⏎   "explanation": "The MessageBus applies middlewares sequentially, and each Trace middleware echoes its tag before calling the next in the chain, producing M1M2." ⏎ }

```json ⏎ { ⏎   "answer": "11", ⏎   "explanation": "The HandleMessageMiddleware with a HandlersLocator configured to have two handlers for the same message class invokes all matching handlers, incrementing $n by 1 then by 10." ⏎ } ⏎ ```

{ ⏎   "answer": 1, ⏎   "explanation": "The unique index ensures only one row with a=1 can exist, and ON CONFLICT DO NOTHING ignores the duplicate insert." ⏎ }

{"answer": "2", "explanation": "The UNIQUE constraint is deferred until the end of the transaction, so both inserts succeed, yielding a count of 2."}

{"answer": "3", "explanation": "The --filter test_sum matches the test methods test_sum and test_sum_abs, each provided with 3 datasets by the shared data provider, resulting in a total of 3 test cases executed, while test_other is excluded."}

{"answer": "2, 1", "explanation": "The DataProvider 'prov' yields two datasets [[1], [-1]], so two test iterations run, and only the second one where $x is -1 fails the assertion."}

{ ⏎   "answer": "POST", ⏎   "explanation": "The -d option in curl specifies data to send via a POST request when no -X flag is provided." ⏎ }

{ ⏎   "answer": "GET", ⏎   "explanation": "The -G flag tells curl to encode data from -d as query string parameters and send it with a GET request." ⏎ }

{ ⏎   "answer": "invalid_client", ⏎   "explanation": "RFC 6749 Section 5.2 specifies that 'invalid_client' is returned when the authorization server does not recognize the client, including a non-existent client_id." ⏎ }

{ ⏎   "answer": "the query string", ⏎   "explanation": "In the Implicit grant, the authorization server appends the token parameters to the query string of the redirect_uri when sending the browser back to the client." ⏎ }

{ ⏎   "answer": "0", ⏎   "explanation": "In Twig, the default filter only replaces a value when it is null, so false remains false, and false multiplied by 3 results in 0." ⏎ }

{"answer": "Twig\\TemplateRuntimeException", "explanation": "The expression 'a' ~ 1 + 2 concatenates a string with a number using the ~ operator, which is not supported in Twig, and throws a TemplateRuntimeException."}

{ ⏎   "answer": "1", ⏎   "explanation": "The empty string fails the NotBlank constraint, producing one validation violation." ⏎ }

{"answer": "valid", "explanation": "A newly created form in Symfony is valid by default before any data is bound and submitted, so isValid() returns true."}

{ ⏎   "answer": "same", ⏎   "explanation": "In a compiled Symfony container, $c->get('a') returns the same cached object instance each time, so both spl_object_id() calls are equal." ⏎ }

{ ⏎   "answer": "hi Bob", ⏎   "explanation": "Symfony's parameter replacement processes the %name% token in 'greeting' and then the %greeting%! token in 'message', resulting in 'hi Bob'." ⏎ }

{"answer":"776px","explanation":"Bootstrap 5.3 sets the max-width for the .container class to 776px at viewports of 992px and above, as defined by the --bs-container-max-width-lg CSS variable."}

{"answer": "text-primary", "explanation": "In Bootstrap, when multiple text color utility classes are applied to the same element, the one that appears last in the class list is the one that takes precedence."}

{"answer": 2, "explanation": "The class in the Domain layer imports from Application and Infrastructure, both of which violate the rule that Domain must only depend on Domain."}

{"answer": 3, "explanation": "Deptrac reports 3 violations: the constructor type-hints an Application layer class (PlaceOrder), and two Infrastructure layer classes (Db and Logger) that both violate the rule that the Domain layer can depend only on Domain."}

{"answer": "10,15", "explanation": "The readonly property $a->amount remains 10, while $c->amount is 15 from the addition."}

{"answer": 1, "explanation": "The remove call is blocked by the DomainException because the order only has one item, so the count remains 1."}

{ ⏎   "answer": "hi", ⏎   "explanation": "The code instantiates class C and calls its hi method, which returns the string 'hi'." ⏎ }

{ ⏎ "answer": "yes yes", ⏎ "explanation": "PHP 8.5 Reflection::newLazyGhost() creates a lazy ghost object that remains uninitialized until the first property access, so the first check prints yes, the access initializes the object (running the factory), and the second check prints no." ⏎ }

```json ⏎ {"answer": "no", "explanation": "Symfony 6.4 was the final version with the Guard component, which was removed in 7.0."} ⏎ ```

{"answer": "yesno", "explanation": "In Symfony 8.1, the old AnnotationClassLoader has been removed entirely, so its class_exists check returns false ('no'), while the new AttributeClassLoader remains available and exists ('yes')."}