Symfony is a powerful PHP framework renowned for its versatility and robustness. Established in 2005, it follows the MVC architecture, offering reusable components and tools for web development. With a strong community, Symfony excels in creating everything from small apps to complex enterprise systems, making it a top choice for PHP developers.
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Practice Test
151. Which Symfony component is responsible for handling HTTP requests and responses and executing middleware?
A. Routing
B. Form Component
C. HTTP Kernel
D. Twig
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Answer: HTTP Kernel
152. What is an event in Symfony's event-driven architecture?
A. A person who receives email notifications
B. An occurrence or a change of state within an application that can be observed and reacted to
C. A type of middleware
D. A caching strategy
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Answer: An occurrence or a change of state within an application that can be observed and reacted to
153. Which Symfony component allows developers to dispatch and listen for events within an application?
A. Doctrine
B. Event Dispatcher
C. Security
D. Validator
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Answer: Event Dispatcher
154. In Symfony, what is a subscriber in the context of event handling?
A. A person who subscribes to a newsletter
B. A listener that is registered to listen to specific events and can be reused across different parts of an application
C. A user who logs in to the application
D. A type of middleware
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Answer: A listener that is registered to listen to specific events and can be reused across different parts of an application
155. How can you register an event listener in Symfony?
A. By editing the .env file
B. By adding a listener class to the listeners section of the config.yaml file
C. By using the @EventListener annotation in the controller
D. By adding an entry to the services.yaml file and tagging it as an event listener
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Answer: By adding an entry to the services.yaml file and tagging it as an event listener
156. In Symfony, when is the kernel.controller event typically dispatched?
A. Before handling a request
B. After handling a request
C. During form submission
D. Only when an error occurs
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Answer: Before handling a request
157. Which of the following statements is true about Symfony middleware?
A. Middleware is specific to handling routing in Symfony applications.
B. Middleware is always executed before event listeners.
C. Middleware is executed in a specific order defined by the application configuration.
D. Middleware is primarily used for form handling.
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Answer: Middleware is executed in a specific order defined by the application configuration.
158. What is the Symfony Profiler Toolbar used for?
A. To create HTML templates
B. To manage database migrations
C. To provide insights into the performance and behavior of requests, including executed events and middleware
D. To define API routes
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Answer: To provide insights into the performance and behavior of requests, including executed events and middleware
159. Which command is used to list all registered event listeners and subscribers in a Symfony application?
A. php artisan event:list
B. php bin/console debug:event-dispatcher
C. symfony event:register
D. composer show event-listeners
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Answer: php bin/console debug:event-dispatcher
160. In Symfony, what is the primary purpose of error handling?
A. To create HTML templates
B. To gracefully handle and report errors that occur during the execution of an application
C. To define API routes
D. To manage database migrations
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Answer: To gracefully handle and report errors that occur during the execution of an application
