Service Container & Dependency Injection Session

Question 1 of 12

What is the primary role of the Symfony Service Container?

Managing the lifecycle of objects (services) and their dependencies Handling HTTP requests and responses Defining routes for the application Interacting with databases

Question 2 of 12

Which of the following describes Dependency Injection (DI)?

A technique for managing database connections. A design pattern where dependencies are provided to an object instead of the object creating them. A method for optimizing code execution speed. A design pattern where objects create their own dependencies.

Question 3 of 12

What is a 'service' in the context of the Symfony Service Container?

A web service endpoint. A reusable PHP object managed by the container. A database query. A configuration file.

Question 4 of 12

Which Symfony component is responsible for managing services?

HttpFoundation

Security

Routing

DependencyInjection

Question 5 of 12

What is the purpose of the

services.yaml

file in a Symfony project?

To store user authentication credentials. To configure the database connection. To define routes for the application. To define and configure services within the Service Container.

Question 6 of 12

What does the

autowire

option in

services.yaml

do?

Automatically creates database tables. Automatically handles security authentication. Automatically injects dependencies into a service based on type hints. Automatically generates forms.

Question 7 of 12

What is the difference between constructor injection and setter injection?

Constructor injection is done via the class constructor, while setter injection is done via setter methods. There is no difference; they are interchangeable. Constructor injection is only used for scalar values. Setter injection is more performant than constructor injection.

Question 8 of 12

What is a compiler pass in the Symfony Service Container?

A way to compile PHP code into machine code. A process for optimizing database queries. A tool for automatically generating documentation. A mechanism to modify the service container configuration after it has been loaded.

Question 9 of 12

How can you access a service from within a controller in Symfony?

Using the

get()

method of the controller's

container

property (e.g.,

$this->container->get('my_service')

). By directly instantiating the service class. By using global variables. Services cannot be accessed from controllers.

Question 10 of 12

What is the purpose of service decoration in Symfony?

To change the visual appearance of a web page. To modify or enhance the behavior of an existing service without directly modifying its class. To optimize image loading. To encrypt sensitive data.