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.

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1. What is the purpose of tap() in an HTTP request?

A) It modifies the response before returning it

B) It validates the request headers

C) It cancels the request

D) It logs or performs side effects without modifying the response

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

A) A method to directly access the database

B) A tool for debugging Angular applications

C) A function that manages component state

D) A design pattern to manage dependencies in a class

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3. What does JWT stand for?

A) JAR Web Token

B) JavaScript Web Token

C) Java Web Token

D) JSON Web Token

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4. What is the purpose of the app-routing.module.ts file?

A) It defines routes for navigation

B) It contains component logic

C) It sets up the database connection

D) It initializes the Angular application

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5. How can Angular optimize images for deployment?

A) Lazy loading images

B) All of the above

C) Compressing images

D) Using WebP format

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6. What is OAuth 2.0 in Angular authentication?

A) A CSS framework for styling Angular applications

B) A debugging tool for Angular components

C) A frontend library for animations

D) A token-based authentication framework

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7. What does routerLinkActive do?

A) Highlights the active link

B) Caches routes

C) Disables inactive links

D) Redirects users automatically

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8. What is the primary purpose of RxJS in Angular?

A) To replace JavaScript completely

B) To handle asynchronous data streams

C) To create CSS animations

D) To write SQL queries

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

A) Buffer overflow

B) DDoS attacks

C) Cross-Site Scripting (XSS)

D) SQL injection

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

A) It contains Angular application logic

B) It is responsible for routing

C) It acts as the main template for the application

D) It defines TypeScript configurations

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11. What is the use of patchValue() in Reactive forms?

A) Deletes form controls

B) Clears all form controls

C) Updates all form controls

D) Updates specific form controls

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

A) ngOnChanges

B) ngOnInit

C) ngAfterViewInit

D) ngDoCheck

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

A) FeatureModule.configRoutes(routes)

B) RouterModule.forChild(routes)

C) RouterModule.forRoot(routes)

D) RouterModule.define(routes)

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

A) The child component will receive data

B) It has no effect

C) The application will crash

D) The parent component will receive data

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15. How do you bind an input field in Template-driven forms?

A) Using [(ngModel)]

B) Using formControlName

C) Using {{ variable }}

D) Using value=''

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16. What is the purpose of valueChanges in Angular forms?

A) It resets the form automatically

B) It validates the form

C) It submits the form

D) It listens for changes in the form values

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17. What is TypeScript?

A) A superset of JavaScript that adds static typing

B) A database query language

C) A replacement for JavaScript

D) A JavaScript framework

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18. How do you submit a form in Angular?

A) Using (ngSubmit)='onSubmit()'

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

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

D) Using (click)='submit()'

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19. What does the routerLink directive do?

A) Calls an API

B) Defines the router configuration

C) Handles data fetching

D) Navigates between routes in templates

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20. What is Angular?

A) A programming language

B) A front-end framework for building web applications

C) A database management system

D) A back-end framework for Node.js applications

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21. How many components can an Angular application have?

A) Only ten

B) Only three

C) Only one

D) Unlimited

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

A) ng serve

B) ng deploy

C) ng start

D) ng build --prod

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23. How do you handle errors in an Angular HTTP request?

A) Using catchError()

B) Using handleError()

C) Using errorResponse()

D) Using throwError()

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24. What is the role of reducers in NgRx?

A) They increase application security

B) They reduce API call latency

C) They modify the application state based on actions

D) They filter unnecessary UI components

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25. Where should authentication tokens be stored?

A) HTTP Headers

B) Local Storage

C) Session Storage

D) Cookies

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26. How do you select data from the NgRx store?

A) Using store.reduce()

B) Using store.dispatch()

C) Using store.getState()

D) Using store.select()

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27. How does Angular inject dependencies?

A) Automatically using constructors and decorators

B) By hardcoding dependencies

C) Using a centralized configuration file

D) By manually creating instances in components

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28. What is a Directive in Angular?

A) A module

B) A CSS class

C) A way to manipulate the DOM

D) A function to make API calls

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

A) formControl.status

B) formControl.invalid

C) formControl.validState

D) formControl.valid

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30. Which Angular directive helps improve security?

A) ngSanitize

B) ngModel

C) ngIf

D) ngClass

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