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

What is the best way to handle errors in a deployed Angular app?

A) Disabling error messages

B) Logging errors in the console

C) Restarting the server

D) Using a global error handler

2 / 30

What is the primary purpose of RxJS in Angular?

A) To write SQL queries

B) To replace JavaScript completely

C) To handle asynchronous data streams

D) To create CSS animations

3 / 30

Which command is used to build an Angular application for production?

A) ng deploy

B) ng start

C) ng build --prod

D) ng serve

4 / 30

How do you test Angular HTTP services?

A) Using HttpTestClient

B) Using HttpMockService

C) Using APIUnitTestModule

D) Using HttpClientTestingModule

5 / 30

In which year was AngularJS first released?

A) 2006

B) 2010

C) 2009

D) 2008

6 / 30

Which Angular lifecycle hook is called only once when the component is created?

A) ngOnInit()

B) ngOnChanges()

C) ngOnDestroy()

D) ngAfterViewInit()

7 / 30

What is the purpose of createSelector() in NgRx?

A) To modify an observable's behavior

B) To optimize and retrieve specific pieces of state

C) To handle side effects in effects

D) To generate a new reducer

8 / 30

Which Angular feature is used to restrict access to certain routes?

A) Components

B) Services

C) Directives

D) Route Guards

9 / 30

What is RouterModule.forRoot(routes) used for?

A) Configuring child routes

B) Fetching data from APIs

C) Defining service dependencies

D) Registering top-level routes

10 / 30

What is OAuth 2.0 in Angular authentication?

A) A token-based authentication framework

B) A CSS framework for styling Angular applications

C) A frontend library for animations

D) A debugging tool for Angular components

11 / 30

How can a service be limited to a specific module?

A) Declaring it inside main.ts

B) Using { providedIn: 'root' }

C) Using @Component({ providers: [MyService] })

D) Adding it in providers array of a module

12 / 30

Which Angular package is required to handle HTTP requests?

A) @angular/http

B) @angular/common/http

C) @angular/router

D) @angular/forms

13 / 30

Which Angular service is used to make HTTP calls?

A) HttpService

B) HttpClient

C) Http

D) ApiService

14 / 30

Which route guard is used to prevent unauthorized access to routes?

A) Resolve

B) CanDeactivate

C) CanLoad

D) CanActivate

15 / 30

What are the three main parts of an Angular component?

A) Module, Directive, Pipe

B) HTML, CSS, JavaScript

C) Template, Class, Styles

D) Service, Module, Component

16 / 30

What is the default command to open an Angular project in a browser after serving?

A) npm start

B) ng start

C) ng open

D) ng serve --open

17 / 30

What happens if a service is provided in both root and a module?

A) It affects all other services

B) A new instance is created for the module

C) The global instance is used

D) Angular throws an error

18 / 30

What happens when a service is removed from the providers array but still injected into a component?

A) The service is automatically re-added

B) The component works fine without it

C) A new instance is created manually

D) Angular throws an error

19 / 30

What is the use of ngOnDestroy() lifecycle hook?

A) It runs when the view is updated

B) It initializes the component

C) It performs cleanup tasks before a component is destroyed

D) It triggers change detection

20 / 30

Which Angular directive is used for conditional rendering?

A) *ngIf

B) *ngFor

C) *ngSwitch

D) *ngModel

21 / 30

What is an important step before deploying an Angular app?

A) Running tests

B) Checking performance

C) Optimizing assets

D) All of the above

22 / 30

How do you enable strict type checking in TypeScript?

A) Both A and B

B) By setting "strict": true in tsconfig.json

C) By using the --strict flag when compiling

D) TypeScript does not support strict checking

23 / 30

What is the purpose of the index.html file in an Angular project?

A) It contains Angular application logic

B) It defines TypeScript configurations

C) It acts as the main template for the application

D) It is responsible for routing

24 / 30

What is the default root module in an Angular application?

A) main.ts

B) app.module.ts

C) angular.json

D) app.component.ts

25 / 30

How do you inject a service into a component?

A) By calling new MyService()

B) By using @Injectable({ component: 'AppComponent' })

C) Using constructor(private service: MyService) { }

D) Using import { MyService } only

26 / 30

How does a child component communicate with a parent component?

A) Using @Output and EventEmitter

B) Using @Injectable service

C) Using @ChildComponent decorator

D) Using @Input decorator

27 / 30

What is a child route in Angular?

A) A duplicate route

B) A sub-route inside a parent route

C) A route that is lazy-loaded

D) A secondary navigation option

28 / 30

What happens if you use @Input() in a parent component?

A) It has no effect

B) The child component will receive data

C) The application will crash

D) The parent component will receive data

29 / 30

What is Dependency Injection (DI) in Angular?

A) A way to define component styles

B) A design pattern that manages dependencies automatically

C) A way to write unit tests

D) A technique for handling HTTP requests

30 / 30

What is a module in Angular?

A) A CSS styling framework

B) A collection of components and services

C) A function that executes background tasks

D) A single JavaScript file

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