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.

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1. What does @ViewChild() do in Angular?

A) Manages event listeners in the DOM

B) Passes data from a parent component to a child component

C) Creates a new child component dynamically

D) Allows a component to access a child component or DOM element

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2. Which RxJS operator is commonly used to handle API responses?

A) map

B) filter

C) switchMap

D) mergeMap

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3. What does HttpOnly in cookies do?

A) Allows JavaScript to access cookies

B) Blocks Angular services

C) Prevents JavaScript from accessing cookies

D) Enables real-time data binding

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4. Which of the following is a key feature of TypeScript?

A) Only works with Angular

B) Object-oriented programming features

C) No support for JavaScript functions

D) Dynamic typing

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

A) Disabling error messages

B) Restarting the server

C) Using a global error handler

D) Logging errors in the console

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6. What does { providedIn: 'root' } do in a service?

A) Makes the service available globally

B) Forces Angular to create multiple instances

C) Prevents dependency injection

D) Limits the service to one module

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7. What is the purpose of http.delete() in Angular?

A) It removes a component

B) It logs errors

C) It deletes data from a server

D) It cancels an HTTP request

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8. How do you cancel an ongoing HTTP request in Angular?

A) By setting { cancel: true } in headers

B) By calling httpClient.cancel()

C) By using unsubscribe()

D) By using AbortController

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9. How do you define a component in Angular?

A) Using the @Directive decorator

B) Using the @Component decorator

C) Using the @Injectable decorator

D) Using the @Module decorator

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10. What type of attack does XSS refer to?

A) DDoS

B) SQL Injection

C) Cross-Site Scripting

D) Phishing

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11. What is the main decorator used to define an Angular module?

A) @NgModule

B) @Directive

C) @Injectable

D) @Component

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

A) It validates the request headers

B) It cancels the request

C) It modifies the response before returning it

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

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13. What is the purpose of the styles.scss file in an Angular project?

A) Stores API configurations

B) Handles routing information

C) Defines component logic

D) Contains global styles for the application

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14. What Angular feature is used to automatically attach authentication headers to HTTP requests?

A) Route Guards

B) Services

C) Directives

D) HTTP Interceptors

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15. What is used to group multiple form controls in Reactive forms?

A) FormGroup

B) FormControlGroup

C) FormCollection

D) formArray

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

A) Service

B) Component

C) Directive

D) Injectable

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17. What are the three main parts of an Angular component?

A) Template, Class, Styles

B) HTML, CSS, JavaScript

C) Module, Directive, Pipe

D) Service, Module, Component

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18. Which operator is commonly used with NgRx effects for handling API calls?

A) switchMap()

B) map()

C) take(1)

D) debounceTime()

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19. Which major change occurred with the release of Angular 2 in 2016?

A) It replaced JavaScript with Python

B) It became a backend framework

C) It removed the need for HTML and CSS

D) It introduced a completely new architecture based on TypeScript

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

A) @Injectable

B) @Service

C) @Directive

D) @Component

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21. How do you submit a form in Angular?

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

B) Using (submit)='onSubmit()'

C) Using (formSubmit)='onSubmit()'

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

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22. How do you transform an API response before using it?

A) Using concatMap()

B) Using map() in RxJS

C) Using filter()

D) Using delay()

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23. What is the default file where Angular component styles are defined?

A) app.component.html

B) app.component.css

C) styles.css

D) app.module.ts

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24. What does ng lint do in Angular?

A) Deploys the application

B) Checks code for best practices

C) Fixes TypeScript errors

D) Tests application performance

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25. What is the purpose of params in route configuration?

A) To fetch API data

B) To define default routes

C) To pass dynamic values in a route

D) To create child routes

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26. What is the purpose of the angular.json file?

A) It contains project configuration settings

B) It defines project dependencies

C) It manages backend API calls

D) It is responsible for component styling

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27. What does routerLinkActive do?

A) Highlights the active link

B) Disables inactive links

C) Caches routes

D) Redirects users automatically

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28. Which function in NgRx is used to define initial state?

A) initializeState()

B) createReducer()

C) defineState()

D) setInitialState()

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29. How do you prevent multiple instances of a service?

A) Avoid using services

B) Create multiple service classes

C) Use { providedIn: 'root' }

D) Manually create service instances

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30. What is the use of ngOnDestroy() lifecycle hook?

A) It performs cleanup tasks before a component is destroyed

B) It initializes the component

C) It runs when the view is updated

D) It triggers change detection

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