Advanced Angular MCQs with answers Page - 3

You will find multiple-choice questions (MCQs) related to #Advanced Angular here. Go through these questions to prepare effectively for your upcoming exams and interviews.

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Q. Which lifecycle hook runs after every change detection cycle?

  • (A) ngOnInit
  • (B) ngAfterViewInit
  • (C) ngDoCheck
  • (D) ngOnDestroy

A

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

  • (A) combineLatest
  • (B) merge
  • (C) forkJoin
  • (D) zip

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Q. What does ViewChild return by default?

  • (A) Component instance only
  • (B) ElementRef or component/directive instance
  • (C) HTML string
  • (D) Observable

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Q. Which Angular form type is immutable?

  • (A) Template-driven forms
  • (B) Reactive forms
  • (C) Hybrid forms
  • (D) Dynamic forms

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Q. Which directive allows projecting external content?

  • (A) ngTemplateOutlet
  • (B) ngIf
  • (C) ngContent
  • (D) ngSwitch

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Q. Which Angular API enables manual change detection?

  • (A) ApplicationRef
  • (B) ChangeDetectorRef
  • (C) NgZone
  • (D) Injector

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

  • (A) CanActivate
  • (B) CanLoad
  • (C) CanDeactivate
  • (D) Resolve

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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

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

  • (A) map
  • (B) shareReplay
  • (C) filter
  • (D) delay

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Q. Which Angular testing utility creates a test environment?

  • (A) TestBed
  • (B) Jasmine
  • (C) Karma
  • (D) Protractor

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