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

1. What is Cross-Site Scripting (XSS) in Angular?

A) A vulnerability that allows injecting malicious scripts

B) A type of secure authentication

C) A method to enhance security

D) A debugging tool in Angular

2 / 30

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

A) Manages routing configurations

B) Stores Angular service configurations

C) Configures TypeScript compilation settings

D) Defines Angular component styles

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3. 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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4. How do you specify a function's return type in TypeScript?

A) function myFunc { return number 10; }

B) function myFunc -> number { return 10; }

C) function myFunc = (number) => { return 10; }

D) function myFunc(): number { return 10; }

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5. What is TypeScript?

A) A replacement for JavaScript

B) A database query language

C) A superset of JavaScript that adds static typing

D) A JavaScript framework

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

A) Reduces page size

B) Speeds up initial load time

C) Enhances security

D) Improves SEO

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7. What does the enum type do in TypeScript?

A) Represents a data type for decimal numbers

B) Defines a class

C) Creates an array

D) Defines a set of named constant values

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8. What is a component in Angular?

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

B) A service that manages API calls

C) A built-in Angular directive

D) A function that fetches data from the server

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9. Which Angular directive helps improve security?

A) ngModel

B) ngClass

C) ngSanitize

D) ngIf

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

A) Functions

B) Interfaces

C) Arrays

D) Loops

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11. What is Lazy Loading in Angular?

A) A CSS technique for styling Angular components

B) A way to delay HTTP requests

C) A method to load only required modules on demand

D) A performance issue in Angular applications

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12. Which RxJS operator is used to retry an HTTP request if it fails?

A) delay()

B) catchError()

C) map()

D) retry()

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

A) @Component

B) @Directive

C) @NgModule

D) @Injectable

14 / 30

14. What does ng lint do in Angular?

A) Tests application performance

B) Deploys the application

C) Checks code for best practices

D) Fixes TypeScript errors

15 / 30

15. What does touched mean in Angular forms?

A) The field is empty

B) The form has been submitted

C) The user has clicked inside the field

D) The field has been modified

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16. What does on() do inside a reducer in NgRx?

A) Defines how actions affect state

B) Configures the NgRx store

C) Handles HTTP requests

D) Binds effects to reducers

17 / 30

17. What is lazy loading in Angular routing?

A) Caching API responses

B) Loading JavaScript files dynamically

C) Loading components only when needed

D) Loading routes based on user permissions

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

A) To handle asynchronous data streams

B) To replace JavaScript completely

C) To write SQL queries

D) To create CSS animations

19 / 30

19. What is the default HTTP request method used by httpClient if not specified?

A) GET

B) PUT

C) POST

D) DELETE

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20. What is the purpose of Source Maps in Angular?

A) Improving performance

B) Debugging production code

C) Reducing bundle size

D) Enabling offline support

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21. What is the purpose of ViewChild in Angular?

A) To create a new component dynamically

B) To define a component as a child of another

C) To get a reference to a child component or DOM element

D) To pass data from a child to a parent

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22. How do you navigate back to the previous page using Angular Router?

A) this.location.back()

B) this.router.goBack()

C) this.router.previous()

D) this.router.navigateBack()

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23. How can a service be injected at the component level instead of globally?

A) Add it in the providers array of @Component

B) Use { providedIn: 'root' }

C) Import it in app.module.ts

D) Declare it in @NgModule.providers

24 / 30

24. What is the key advantage of using the NgRx store over Angular services?

A) It directly modifies the DOM

B) It eliminates the need for HTTP requests

C) It prevents the use of observables

D) It offers centralized state management

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

A) By storing sensitive data in local storage

B) By automatically sanitizing data in templates

C) By using bypassSecurityTrustHtml()

D) By allowing all JavaScript code

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26. What does the routerLink directive do?

A) Handles data fetching

B) Defines the router configuration

C) Calls an API

D) Navigates between routes in templates

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27. Which keyword is used to declare a variable in TypeScript?

A) const

B) let

C) var

D) All of the above

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28. How do you define a component in Angular?

A) Using the @Component decorator

B) Using the @Injectable decorator

C) Using the @Directive decorator

D) Using the @Module decorator

29 / 30

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

A) Using formControlName

B) Using [(ngModel)]

C) Using value=''

D) Using {{ variable }}

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

A) Forces Angular to create multiple instances

B) Limits the service to one module

C) Makes the service available globally

D) Prevents dependency injection

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