Angular Quiz Test Online (30 random Questions) 2026

This quick 30-minute challenge consists of 30 random multiple-choice questions designed to test your knowledge across various Angular topics, including the introduction to Angular, TypeScript basics, project structure and fundamentals, components and communication, services and dependency injection, routing and navigation, forms in Angular, HTTP and API integration, state management with RxJS and NgRx, as well as authentication and security practices. Whether you’re just starting or looking to deepen your expertise, this quiz will enhance your understanding of Angular’s framework and best practices.

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30 Minutes Angular Quiz Test Online

Welcome to the Angular Quiz! This quick 30-minute challenge consists of 30 random multiple-choice questions designed to test your knowledge across various Angular topics, including the introduction to Angular, TypeScript basics, project structure and fundamentals, components and communication, services and dependency injection, routing and navigation, forms in Angular, HTTP and API integration, state management with RxJS and NgRx, as well as authentication and security practices. Whether you're just starting or looking to deepen your expertise, this quiz will enhance your understanding of Angular's framework and best practices.

1 / 30

1. What is the main benefit of OnPush change detection strategy?

A) It runs change detection continuously

B) It improves performance by reducing unnecessary checks

C) It disables change detection

D) It allows direct DOM manipulation

2 / 30

2. What is the purpose of TypeScript's namespace?

A) To create a module-like structure for code organization

B) To define functions

C) To handle exceptions

D) To declare variables

3 / 30

3. Which core concept of NgRx holds the entire application state?

A) Actions

B) Store

C) Reducers

D) Effects

4 / 30

4. Which of the following is NOT a valid way to share data between Angular components?

A) Using @Input()

B) Using local storage

C) Using @Output()

D) Using a shared service

5 / 30

5. Which component acts as the root component in an Angular project?

A) app.component.ts

B) index.html

C) app.module.ts

D) main.ts

6 / 30

6. Which decorator is used to define an Angular component?

A) Injectable

B) Directive

C) Component

D) Service

7 / 30

7. What is the purpose of RouterModule in Angular?

A) To store application data

B) To communicate with backend servers

C) To manage component styles

D) To handle application routing

8 / 30

8. Which command updates Angular dependencies?

A) ng update

B) npm install

C) ng refresh

D) ng upgrade

9 / 30

9. Which module is required to make HTTP requests in Angular?

A) FormsModule

B) HttpClientModule

C) CommonModule

D) HttpModule

10 / 30

10. What is the default HTTP request method used by httpClient if not specified?

A) DELETE

B) POST

C) GET

D) PUT

11 / 30

11. How can you retrieve route parameters in a component?

A) Using HttpClient

B) Using RouterModule

C) Using ActivatedRoute service

D) Using RouteService

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12. What is Dependency Injection (DI) in Angular?

A) A tool for debugging Angular applications

B) A method to directly access the database

C) A design pattern to manage dependencies in a class

D) A function that manages component state

13 / 30

13. What decorator is used to create an Angular service?

A) @Directive

B) @Component

C) @Service

D) @Injectable

14 / 30

14. How do you compile a TypeScript file?

A) tsc filename.ts

B) node filename.ts

C) compile filename.ts

D) typescript filename.ts

15 / 30

15. What is the key advantage of using the NgRx store over Angular services?

A) It eliminates the need for HTTP requests

B) It directly modifies the DOM

C) It prevents the use of observables

D) It offers centralized state management

16 / 30

16. Which of the following is NOT a reason to use services in Angular?

A) To store reusable logic

B) To fetch and manage data

C) To share data between components

D) To increase memory usage

17 / 30

17. What does the subscribe() method do in RxJS?

A) Stores an observable in local storage

B) Triggers an observable to execute

C) Converts an observable into a promise

D) Cancels an observable

18 / 30

18. How many components can an Angular application have?

A) Only one

B) Only three

C) Unlimited

D) Only ten

19 / 30

19. What is an Angular Injector?

A) A method to call services

B) A system that maintains dependencies and injects them where needed

C) A built-in function to modify services

D) A tool to create components

20 / 30

20. Which Angular lifecycle hook is best for making API calls?

A) ngAfterViewInit()

B) ngOnDestroy()

C) ngDoCheck()

D) ngOnInit()

21 / 30

21. What is Dependency Injection (DI) in Angular?

A) A way to write unit tests

B) A technique for handling HTTP requests

C) A design pattern that manages dependencies automatically

D) A way to define component styles

22 / 30

22. What is the singleton pattern in Angular services?

A) Ensuring multiple instances of a service exist

B) Limiting a service to one instance across the application

C) Creating an instance of a service for each component

D) Preventing dependency injection

23 / 30

23. What is the correct way to handle timeouts in Angular HTTP requests?

A) setTimeout()

B) catchError()

C) delay()

D) timeout() operator in RxJS

24 / 30

24. How can two unrelated components communicate in Angular?

A) Using @Output

B) Using a shared service

C) Using local variables

D) Using @Input

25 / 30

25. What is a resolver in Angular routing?

A) A function that delays navigation

B) A way to prevent unauthorized access

C) A built-in Angular directive

D) A service that pre-fetches data before a route is activated

26 / 30

26. How do you trigger an event using EventEmitter in Angular?

A) this.eventName.trigger()

B) this.eventName.emit(value)

C) this.eventName.broadcast(value)

D) this.eventName.send()

27 / 30

27. What is Cross-Site Scripting (XSS) in Angular?

A) A debugging tool in Angular

B) A type of secure authentication

C) A vulnerability that allows injecting malicious scripts

D) A method to enhance security

28 / 30

28. What is the main advantage of using Angular?

A) Two-way data binding

B) Automatic database integration

C) No need for a server

D) Uses only JavaScript

29 / 30

29. Which lifecycle hook is useful for initializing form data in a component?

A) ngOnChanges

B) ngDoCheck

C) ngAfterViewInit

D) ngOnInit

30 / 30

30. How do you dynamically add form controls in a Reactive form?

A) Using FormArray.push()

B) Using form.insertControl()

C) Using form.extend()

D) Using form.addControl()

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