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 @Output in Angular do?

A) Performs dependency injection

B) Allows a parent component to pass data to a child component

C) Creates a new component dynamically

D) Allows a child component to send data to its parent component

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2. What does ng lint do in Angular?

A) Fixes TypeScript errors

B) Deploys the application

C) Tests application performance

D) Checks code for best practices

3 / 30

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

A) It defines TypeScript configurations

B) It is responsible for routing

C) It acts as the main template for the application

D) It contains Angular application logic

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4. How do you submit a form in Angular?

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

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

C) Using (click)='submit()'

D) Using (formSubmit)='onSubmit()'

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

A) formControl.invalid

B) formControl.validState

C) formControl.status

D) formControl.valid

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6. What is the purpose of ngAfterViewInit() lifecycle hook?

A) It checks for data changes

B) It runs after the component's view has been initialized

C) It initializes the component

D) It executes before the component is destroyed

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7. How do you compile a TypeScript file?

A) tsc filename.ts

B) node filename.ts

C) typescript filename.ts

D) compile filename.ts

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8. What is an Angular component?

A) A module that controls application routing

B) A JavaScript function used to manipulate the DOM

C) A predefined service in Angular

D) A UI building block with an HTML template, TypeScript class, and CSS styles

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9. What type of attack does XSS refer to?

A) Cross-Site Scripting

B) Phishing

C) DDoS

D) SQL Injection

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

A) A design pattern to manage dependencies in a class

B) A method to directly access the database

C) A tool for debugging Angular applications

D) A function that manages component state

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11. What is lazy loading in Angular routing?

A) Loading routes based on user permissions

B) Loading components only when needed

C) Loading JavaScript files dynamically

D) Caching API responses

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

A) angular.json

B) app.module.ts

C) index.html

D) main.ts

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13. Which Angular directive is used for two-way data binding in forms?

A) ngIf

B) ngFor

C) ngModel

D) formControl

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14. Who developed TypeScript?

A) Apple

B) Facebook

C) Google

D) Microsoft

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

A) mergeMap

B) filter

C) switchMap

D) map

16 / 30

16. Which Angular directive is used for conditional rendering?

A) *ngSwitch

B) *ngModel

C) *ngFor

D) *ngIf

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17. What is the best way to prevent brute-force attacks in Angular authentication?

A) Rate limiting login attempts

B) Allowing unlimited login attempts

C) Storing passwords in plaintext

D) Using a single static password

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

A) Component

B) Directive

C) Service

D) Injectable

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19. How do you apply validation in Template-driven forms?

A) Using formValidate() function

B) Forms in Angular do not support validation

C) Using Angular Validators in TypeScript

D) Using validation directives in the template

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20. Which module is required to work with forms in Angular?

A) FormsModule

B) Both A and B

C) CommonModule

D) ReactiveFormsModule

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21. How do you get the value of a form control in Reactive forms?

A) formControl.returnValue()

B) formControl.getValue()

C) formControl.fetch()

D) formControl.value

22 / 30

22. Which file contains Angular environment configurations?

A) package.json

B) environment.ts

C) angular.json

D) config.json

23 / 30

23. What is a component in Angular?

A) A service that manages API calls

B) A built-in Angular directive

C) A function that fetches data from the server

D) A UI element that controls a part of the page

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

A) @Directive

B) @Component

C) @Output

D) @Injectable

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

A) To pass dynamic values in a route

B) To define default routes

C) To fetch API data

D) To create child routes

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26. In which year was AngularJS first released?

A) 2006

B) 2010

C) 2008

D) 2009

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27. Which Angular CLI command compiles the project into a dist/ folder?

A) ng compile

B) ng generate

C) ng serve

D) ng build

28 / 30

28. Which TypeScript feature helps in defining a reusable structure for objects?

A) Functions

B) Interfaces

C) Loops

D) Arrays

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

A) ngOnInit

B) ngOnChanges

C) ngAfterViewInit

D) ngDoCheck

30 / 30

30. What is a module in Angular?

A) A collection of components and services

B) A single JavaScript file

C) A CSS styling framework

D) A function that executes background tasks

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