Angular MCQs with answers Page - 97

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 lifecycle hook runs after every change detection cycle?

  • (A) ngOnInit
  • (B) ngAfterViewInit
  • (C) ngDoCheck
  • (D) ngOnDestroy
💬 Discuss
✅ Correct Answer: (C) ngDoCheck
Explanation: ngDoCheck runs during every change detection cycle.

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

Q. Which RxJS operator combines multiple observables and emits once all complete?

  • (A) combineLatest
  • (B) merge
  • (C) forkJoin
  • (D) zip
💬 Discuss
✅ Correct Answer: (C) forkJoin
Explanation: forkJoin emits once when all observables complete.

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

Q. What does ViewChild return by default?

  • (A) Component instance only
  • (B) ElementRef or component/directive instance
  • (C) HTML string
  • (D) Observable
💬 Discuss
✅ Correct Answer: (B) ElementRef or component/directive instance
Explanation: @ViewChild provides access to DOM element or component.

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

Q. Which Angular form type is immutable?

  • (A) Template-driven forms
  • (B) Reactive forms
  • (C) Hybrid forms
  • (D) Dynamic forms
💬 Discuss
✅ Correct Answer: (B) Reactive forms
Explanation: Reactive forms use immutable data structures.

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

Q. Which directive allows projecting external content?

  • (A) ngTemplateOutlet
  • (B) ngIf
  • (C) ngContent
  • (D) ngSwitch
💬 Discuss
✅ Correct Answer: (C) ngContent
Explanation: ngContent is used for content projection.

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

Q. Which Angular API enables manual change detection?

  • (A) ApplicationRef
  • (B) ChangeDetectorRef
  • (C) NgZone
  • (D) Injector
💬 Discuss
✅ Correct Answer: (B) ChangeDetectorRef
Explanation: ChangeDetectorRef provides methods to control change detection.

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

Q. Which guard is used to prevent navigation away from a route?

  • (A) CanActivate
  • (B) CanLoad
  • (C) CanDeactivate
  • (D) Resolve
💬 Discuss
✅ Correct Answer: (C) CanDeactivate
Explanation: CanDeactivate stops navigation if conditions fail.

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

Q. What is the purpose of NgZone.runOutsideAngular()?

  • (A) Improves performance by skipping change detection
  • (B) Disables routing
  • (C) Triggers change detection
  • (D) Stops HTTP calls
💬 Discuss
✅ Correct Answer: (A) Improves performance by skipping change detection
Explanation: runOutsideAngular avoids triggering change detection.

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

Q. Which operator shares a single subscription among multiple subscribers?

  • (A) map
  • (B) shareReplay
  • (C) filter
  • (D) delay
💬 Discuss
✅ Correct Answer: (B) shareReplay
Explanation: shareReplay shares and replays emitted values.

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

Q. Which Angular testing utility creates a test environment?

  • (A) TestBed
  • (B) Jasmine
  • (C) Karma
  • (D) Protractor
💬 Discuss
✅ Correct Answer: (A) TestBed
Explanation: TestBed configures the Angular testing module.

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

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