Angular Quiz Test Online (30 random Questions) 2025

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 OAuth 2.0 in Angular authentication?

A) A CSS framework for styling Angular applications

B) A token-based authentication framework

C) A debugging tool for Angular components

D) A frontend library for animations

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2. What is Angular mainly used for?

A) Building single-page applications (SPAs)

B) Database management

C) Backend development

D) Mobile app development only

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3. How can you reset a form in Angular?

A) form.reset()

B) form.clear()

C) form.value = null

D) form.update()

4 / 30

4. Where should services be provided in Angular?

A) In main.ts

B) Only in components

C) In @NgModule or @Component using providedIn

D) Only in app.module.ts

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5. What is the purpose of the tsconfig.json file in an Angular project?

A) It defines TypeScript configuration settings

B) It manages Angular routing

C) It is used to write unit tests

D) It contains project dependencies

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6. What is the main file responsible for bootstrapping an Angular application?

A) angular.json

B) app.module.ts

C) main.ts

D) index.html

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7. What does JWT stand for?

A) JavaScript Web Token

B) JSON Web Token

C) JAR Web Token

D) Java Web Token

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8. How do you check if a form control is valid?

A) formControl.invalid

B) formControl.status

C) formControl.validState

D) formControl.valid

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9. What are NgRx actions?

A) A function that filters observables

B) A way to trigger state changes

C) UI components for animations

D) A replacement for services

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10. Which decorator is used for dependency injection in Angular?

A) @Output

B) @Directive

C) @Injectable

D) @Component

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

A) ng serve --open

B) npm start

C) ng start

D) ng open

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12. What encryption technique is recommended for storing passwords?

A) Hashing with bcrypt

B) URL Encoding

C) Plain text

D) Base64 Encoding

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13. How do you define routes inside a feature module?

A) RouterModule.forRoot(routes)

B) FeatureModule.configRoutes(routes)

C) RouterModule.define(routes)

D) RouterModule.forChild(routes)

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14. What is a Directive in Angular?

A) A way to manipulate the DOM

B) A CSS class

C) A module

D) A function to make API calls

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15. What does CSRF stand for?

A) Cross-Server Response Function

B) Common Security Request Form

C) Cross-Site Request Forgery

D) Client-Side Resource Fetch

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16. What is the purpose of the assets/ folder in an Angular project?

A) It holds Angular service files

B) It contains static resources like images, fonts, and JSON files

C) It includes unit test cases

D) It stores compiled TypeScript files

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17. What is the default path for the home route?

A) '/'

B) ''

C) '*'

D) 'home'

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18. What is a resolver in Angular routing?

A) A function that delays navigation

B) A built-in Angular directive

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

D) A way to prevent unauthorized access

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19. Which module must be imported to enable routing in Angular?

A) @angular/forms

B) @angular/core

C) @angular/common

D) @angular/router

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20. Which attack does Angular’s built-in Content Security Policy (CSP) help prevent?

A) Cross-Site Scripting (XSS)

B) DDoS attacks

C) SQL injection

D) Buffer overflow

21 / 30

21. Which lifecycle hook is used for cleanup operations?

A) ngOnInit()

B) ngAfterViewInit()

C) ngOnDestroy()

D) ngOnChanges()

22 / 30

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

A) catchError()

B) setTimeout()

C) delay()

D) timeout() operator in RxJS

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23. What is the best way to handle authentication in an Angular application?

A) Using local storage to store user credentials

B) Hardcoding usernames and passwords

C) Allowing users to bypass login if they refresh the page

D) Using JWT with an authentication service

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24. How do you submit a form in Angular?

A) Using (click)='submit()'

B) Using (formSubmit)='onSubmit()'

C) Using (submit)='onSubmit()'

D) Using (ngSubmit)='onSubmit()'

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25. How do you set global headers for every HTTP request?

A) Using an HttpInterceptor

B) Using HttpHeaders.setGlobal()

C) Using a config file

D) Setting headers in every HttpClient request

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26. What method is used to listen for route changes?

A) router.events.subscribe()

B) router.change()

C) router.update()

D) router.onRouteChange()

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27. What Angular feature helps improve performance by removing unused code?

A) AOT Compilation

B) Tree Shaking

C) Minification

D) Lazy Loading

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28. How does Angular prevent Cross-Site Scripting (XSS) attacks?

A) By automatically sanitizing data in templates

B) By allowing all JavaScript code

C) By using bypassSecurityTrustHtml()

D) By storing sensitive data in local storage

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29. What is Angular CLI used for?

A) Running JavaScript code

B) Creating and managing Angular projects

C) Managing databases

D) Writing CSS files

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30. What is the primary advantage of Lazy Loading in Angular?

A) Enhances security

B) Reduces page size

C) Speeds up initial load time

D) Improves SEO

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