Home › Quizzes › Angular Services and Dependency Injection

Angular Services and Dependency Injection

This quiz covers fundamental concepts related to Angular Services and Dependency Injection. Test your understanding of service creation, dependency injection, and their application in Angular.

15 Questions Published
Play Quiz Practise this topic out loud

Questions

Question 1 Multiple Choice (Single Answer)

What is the primary purpose of services in Angular?

  1. To provide reusable functionality across components
  2. To handle data manipulation and storage
  3. To manage user interactions and events
  4. To define application routing and navigation
Question 2 Multiple Choice (Single Answer)

Which design pattern is implemented by Angular's Dependency Injection (DI) mechanism?

  1. Singleton
  2. Factory
  3. Decorator
  4. Observer
Question 3 Multiple Choice (Single Answer)

What is the providedIn property used for in Angular services?

  1. To specify the scope of the service (root or component)
  2. To define the dependencies required by the service
  3. To provide metadata about the service for DI
  4. To configure the lifecycle hooks of the service
Question 4 Multiple Choice (Single Answer)

Which Angular decorator is used to mark a class as a service?

  1. @Injectable()
  2. @Component()
  3. @NgModule()
  4. @Directive()
Question 5 Multiple Choice (Single Answer)

What is the purpose of the @Inject() decorator in Angular?

  1. To specify the dependencies required by a service
  2. To define the scope of a service (root or component)
  3. To provide metadata about a service for DI
  4. To configure the lifecycle hooks of a service
Question 6 Multiple Choice (Single Answer)

Which lifecycle hook method is called when an Angular service is destroyed?

  1. ngOnInit()
  2. ngOnDestroy()
  3. ngOnChanges()
  4. ngAfterViewInit()
Question 7 Multiple Choice (Single Answer)

What is the purpose of the providers array in Angular modules?

  1. To define the services available within the module
  2. To specify the components and directives used in the module
  3. To configure the routing for the module
  4. To provide metadata about the module for DI
Question 8 Multiple Choice (Single Answer)

Which Angular service is responsible for making HTTP requests?

  1. HttpClient
  2. HttpService
  3. HttpRequest
  4. HttpResponse
Question 9 Multiple Choice (Single Answer)

What is the difference between a singleton service and a transient service in Angular?

  1. Singleton services are instantiated once and reused throughout the application, while transient services are created each time they are injected.
  2. Singleton services are created each time they are injected, while transient services are instantiated once and reused throughout the application.
  3. Singleton services are only available within the component they are defined in, while transient services can be injected into multiple components.
  4. Singleton services can be injected into multiple components, while transient services are only available within the component they are defined in.
Question 10 Multiple Choice (Single Answer)

Which Angular service is used for managing state and data across components?

  1. StateService
  2. StoreService
  3. ReduxService
  4. NgRx Store
Question 11 Multiple Choice (Single Answer)

What is the purpose of the @Optional() decorator in Angular?

  1. To specify that a dependency is optional and can be omitted if not provided
  2. To mark a service as optional and allow it to be injected without a provider
  3. To define the scope of a service (root or component)
  4. To provide metadata about a service for DI
Question 12 Multiple Choice (Single Answer)

What is the providedIn property used for in Angular services?

  1. To specify the scope of the service (root or component)
  2. To define the dependencies required by the service
  3. To provide metadata about the service for DI
  4. To configure the lifecycle hooks of the service
Question 13 Multiple Choice (Single Answer)

What is the purpose of the @SkipSelf() decorator in Angular?

  1. To skip the current component and search for the dependency in the parent component
  2. To skip the current component and search for the dependency in the child components
  3. To skip the current component and search for the dependency in the sibling components
  4. To skip the current component and search for the dependency in the root component
Question 14 Multiple Choice (Single Answer)

Which Angular service is used for managing user authentication and authorization?

  1. AuthService
  2. UserService
  3. SecurityService
  4. JwtService
Question 15 Multiple Choice (Single Answer)

What is the purpose of the @Host() decorator in Angular?

  1. To access the host element of a directive
  2. To access the host component of a directive
  3. To access the host view of a directive
  4. To access the host template of a directive
← Back to Quizzes