Angular MCQs with answers Page - 96

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 does providedIn: 'root' do?

  • (A) Creates multiple service instances
  • (B) Provides service at component level
  • (C) Registers service as singleton at root level
  • (D) Disables DI
💬 Discuss
✅ Correct Answer: (C) Registers service as singleton at root level
Explanation: providedIn: 'root' creates a singleton service.

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

Q. Which lifecycle hook is used to clean up subscriptions?

  • (A) ngOnInit
  • (B) ngAfterViewInit
  • (C) ngOnDestroy
  • (D) ngDoCheck
💬 Discuss
✅ Correct Answer: (C) ngOnDestroy
Explanation: ngOnDestroy is used to clean up resources like subscriptions.

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

Q. Which directive is used to dynamically load templates?

  • (A) ngTemplateOutlet
  • (B) ngContent
  • (C) ngSwitch
  • (D) ngIf
💬 Discuss
✅ Correct Answer: (A) ngTemplateOutlet
Explanation: ngTemplateOutlet dynamically renders templates.

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

Q. What is the main benefit of standalone components?

  • (A) Require more modules
  • (B) Reduce boilerplate code
  • (C) Disable routing
  • (D) Increase app size
💬 Discuss
✅ Correct Answer: (B) Reduce boilerplate code
Explanation: Standalone components reduce dependency on NgModules.

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

Q. Which operator is best for sequential HTTP calls?

  • (A) mergeMap
  • (B) switchMap
  • (C) concatMap
  • (D) forkJoin
💬 Discuss
✅ Correct Answer: (C) concatMap
Explanation: concatMap ensures sequential execution.

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

Q. What does trackBy function improve in *ngFor?

  • (A) Security
  • (B) Rendering performance
  • (C) Routing
  • (D) Form validation
💬 Discuss
✅ Correct Answer: (B) Rendering performance
Explanation: trackBy helps Angular track items efficiently.

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

Q. Which Angular feature replaces constructor injection in functional APIs?

  • (A) inject()
  • (B) useFactory
  • (C) providers array
  • (D) useClass
💬 Discuss
✅ Correct Answer: (A) inject()
Explanation: inject() function allows DI without constructor.

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

Q. What is the purpose of HttpInterceptor?

  • (A) Routing control
  • (B) Global request/response handling
  • (C) State management
  • (D) Template rendering
💬 Discuss
✅ Correct Answer: (B) Global request/response handling
Explanation: HttpInterceptor intercepts HTTP requests and responses globally.

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

Q. Which Angular feature allows signals-based reactivity?

  • (A) RxJS Subjects
  • (B) Zone.js
  • (C) Angular Signals
  • (D) ChangeDetectorRef
💬 Discuss
✅ Correct Answer: (C) Angular Signals
Explanation: Angular Signals provide fine-grained reactivity without relying on RxJS.

Published by Kartik Sharma ⭐ 8.52K Points at 05-Jan-2026 08:11 am in Angular

Q. What does ChangeDetectorRef.detach() do?

  • (A) Destroys the component
  • (B) Stops change detection for the component
  • (C) Refreshes the view
  • (D) Triggers routing
💬 Discuss
✅ Correct Answer: (B) Stops change detection for the component
Explanation: detach() removes the component from change detection tree.

Published by Kartik Sharma ⭐ 8.52K Points at 05-Jan-2026 08:11 am in Angular

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