Angular MCQs with answers Page - 10

Dear candidates you will find MCQ questions of Angular here. Learn these questions and prepare yourself for coming examinations and interviews. You can check the right answer of any question by clicking on any option or by clicking view answer button.
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Q. Which service is used to interact with the browser's URL in Angular?

  • (A) HttpClient
  • (B) Router
  • (C) Location
  • (D) DomSanitizer
💬 Discuss
✅ Correct Answer: (C) Location
Explanation: Location service allows interaction with the browser's URL.

Published by Mr. Dubey ⭐ 111.54K Points at 08-Jun-2025 11:46 am in Angular

Q. What does Angular's DomSanitizer help with?

  • (A) Performance tuning
  • (B) Animation optimization
  • (C) Security against XSS attacks
  • (D) Router configuration
💬 Discuss
✅ Correct Answer: (C) Security against XSS attacks
Explanation: DomSanitizer helps protect against Cross-Site Scripting (XSS) by sanitizing potentially unsafe inputs.

Published by Mr. Dubey ⭐ 111.54K Points at 08-Jun-2025 11:46 am in Angular

Q. Which pipe is used to transform text to uppercase?

  • (A) capitalize
  • (B) uppercase
  • (C) textFormat
  • (D) stringify
💬 Discuss
✅ Correct Answer: (B) uppercase
Explanation: The `uppercase` pipe transforms text to all uppercase letters.

Published by Mr. Dubey ⭐ 111.54K Points at 08-Jun-2025 11:46 am in Angular

Q. How can you disable a button based on form validation status?

  • (A) [disabled]='form.valid'
  • (B) [disabled]='!form.valid'
  • (C) [disable]='form.valid'
  • (D) [disable]='!form.invalid'
💬 Discuss
✅ Correct Answer: (B) [disabled]='!form.valid'
Explanation: You disable the button when the form is invalid using `!form.valid`.

Published by Mr. Dubey ⭐ 111.54K Points at 08-Jun-2025 11:46 am in Angular

Q. Which Angular CLI command is used to serve the application?

  • (A) ng build
  • (B) ng deploy
  • (C) ng serve
  • (D) ng start
💬 Discuss
✅ Correct Answer: (C) ng serve
Explanation: `ng serve` compiles and serves the app in development mode.

Published by Mr. Dubey ⭐ 111.54K Points at 08-Jun-2025 11:46 am in Angular

Q. Which module is needed to use Angular's reactive forms?

  • (A) FormsModule
  • (B) ReactiveFormsModule
  • (C) HttpClientModule
  • (D) CommonModule
💬 Discuss
✅ Correct Answer: (B) ReactiveFormsModule
Explanation: `ReactiveFormsModule` is required for using reactive forms in Angular.

Published by Mr. Dubey ⭐ 111.54K Points at 08-Jun-2025 11:46 am in Angular

Q. What happens when you use *ngIf and *ngFor on the same element?

  • (A) Both directives work simultaneously
  • (B) Only *ngIf works
  • (C) Error occurs
  • (D) Angular merges both
💬 Discuss
✅ Correct Answer: (C) Error occurs
Explanation: Angular does not allow multiple structural directives on the same element directly.

Published by Mr. Dubey ⭐ 111.54K Points at 08-Jun-2025 11:46 am in Angular

Q. What is a HostListener in Angular?

  • (A) Listens to events on child components
  • (B) Subscribes to observables
  • (C) Listens to DOM events on the host element
  • (D) Captures global events only
💬 Discuss
✅ Correct Answer: (C) Listens to DOM events on the host element
Explanation: @HostListener decorates methods to listen to DOM events on the host element.

Published by Mr. Dubey ⭐ 111.54K Points at 08-Jun-2025 11:46 am in Angular

Q. Which command builds the Angular app for production?

  • (A) ng run
  • (B) ng prod
  • (C) ng build --prod
  • (D) ng serve --prod
💬 Discuss
✅ Correct Answer: (C) ng build --prod
Explanation: `ng build --prod` compiles and optimizes the app for production.

Published by Mr. Dubey ⭐ 111.54K Points at 08-Jun-2025 11:46 am in Angular

Q. What does the async pipe handle automatically?

  • (A) Form validation
  • (B) DOM rendering
  • (C) Subscription and unsubscription
  • (D) Routing and guards
💬 Discuss
✅ Correct Answer: (C) Subscription and unsubscription
Explanation: The async pipe automatically subscribes to an Observable and unsubscribes when the component is destroyed.

Published by Mr. Dubey ⭐ 111.54K Points at 08-Jun-2025 11:46 am in Angular

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