Angular MCQs with answers Page - 95

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. What is the main purpose of ChangeDetectionStrategy.OnPush?

  • (A) Runs change detection on every event
  • (B) Improves performance by reducing change detection cycles
  • (C) Disables change detection completely
  • (D) Works only with services
💬 Discuss
✅ Correct Answer: (B) Improves performance by reducing change detection cycles
Explanation: OnPush runs change detection only when input references change or events occur.

Published by Kartik Sharma ⭐ 8.52K Points at 05-Jan-2026 08:09 am in Angular

Q. Which Angular lifecycle hook is called after content projection?

  • (A) ngOnInit
  • (B) ngAfterViewInit
  • (C) ngAfterContentInit
  • (D) ngDoCheck
💬 Discuss
✅ Correct Answer: (C) ngAfterContentInit
Explanation: ngAfterContentInit is called after projected content is initialized.

Published by Kartik Sharma ⭐ 8.52K Points at 05-Jan-2026 08:09 am in Angular

Q. What does the async pipe do?

  • (A) Subscribes and unsubscribes automatically
  • (B) Converts promises to observables
  • (C) Handles HTTP calls
  • (D) Improves routing speed
💬 Discuss
✅ Correct Answer: (A) Subscribes and unsubscribes automatically
Explanation: Async pipe handles subscription and unsubscription automatically.

Published by Kartik Sharma ⭐ 8.52K Points at 05-Jan-2026 08:09 am in Angular

Q. Which RxJS operator is used to cancel previous HTTP calls?

  • (A) mergeMap
  • (B) concatMap
  • (C) switchMap
  • (D) map
💬 Discuss
✅ Correct Answer: (C) switchMap
Explanation: switchMap cancels the previous observable when a new one is emitted.

Published by Kartik Sharma ⭐ 8.52K Points at 05-Jan-2026 08:09 am in Angular

Q. Which decorator is used to make a class injectable?

  • (A) @Component
  • (B) @NgModule
  • (C) @Injectable
  • (D) @Pipe
💬 Discuss
✅ Correct Answer: (C) @Injectable
Explanation: @Injectable marks a class available for dependency injection.

Published by Kartik Sharma ⭐ 8.52K Points at 05-Jan-2026 08:09 am in Angular

Q. What does ViewEncapsulation.ShadowDom do?

  • (A) Disables CSS
  • (B) Applies global styles
  • (C) Uses native Shadow DOM for style encapsulation
  • (D) Inlines styles
💬 Discuss
✅ Correct Answer: (C) Uses native Shadow DOM for style encapsulation
Explanation: ShadowDom uses browser's native Shadow DOM for encapsulation.

Published by Kartik Sharma ⭐ 8.52K Points at 05-Jan-2026 08:09 am in Angular

Q. Which guard prevents loading of lazy-loaded modules?

  • (A) CanActivate
  • (B) CanDeactivate
  • (C) CanLoad
  • (D) Resolve
💬 Discuss
✅ Correct Answer: (C) CanLoad
Explanation: CanLoad prevents lazy modules from being loaded.

Published by Kartik Sharma ⭐ 8.52K Points at 05-Jan-2026 08:09 am in Angular

Q. Which strategy allows preloading lazy-loaded modules?

  • (A) NoPreloading
  • (B) PreloadAllModules
  • (C) EagerLoading
  • (D) LoadOnDemand
💬 Discuss
✅ Correct Answer: (B) PreloadAllModules
Explanation: PreloadAllModules loads lazy modules in the background.

Published by Kartik Sharma ⭐ 8.52K Points at 05-Jan-2026 08:09 am in Angular

Q. What is a pure pipe?

  • (A) Always recalculates
  • (B) Executes only when input changes
  • (C) Used only for numbers
  • (D) Executes every change detection
💬 Discuss
✅ Correct Answer: (B) Executes only when input changes
Explanation: Pure pipes run only when their input values change.

Published by Kartik Sharma ⭐ 8.52K Points at 05-Jan-2026 08:09 am in Angular

Q. Which Angular feature helps in reducing bundle size?

  • (A) NgModules
  • (B) Lazy loading
  • (C) Two-way binding
  • (D) Event binding
💬 Discuss
✅ Correct Answer: (B) Lazy loading
Explanation: Lazy loading loads modules only when required.

Published by Kartik Sharma ⭐ 8.52K Points at 05-Jan-2026 08:09 am in Angular

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