Advanced Angular MCQs with answers Page - 1

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. 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

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

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

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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

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

  • (A) mergeMap
  • (B) concatMap
  • (C) switchMap
  • (D) map

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

  • (A) @Component
  • (B) @NgModule
  • (C) @Injectable
  • (D) @Pipe

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Q. What does ViewEncapsulation.ShadowDom do?

  • (A) Disables CSS
  • (B) Applies global styles
  • (C) Uses native Shadow DOM for style encapsulation
  • (D) Inlines styles

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

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

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Q. Which strategy allows preloading lazy-loaded modules?

  • (A) NoPreloading
  • (B) PreloadAllModules
  • (C) EagerLoading
  • (D) LoadOnDemand

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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

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Q. Which Angular feature helps in reducing bundle size?

  • (A) NgModules
  • (B) Lazy loading
  • (C) Two-way binding
  • (D) Event binding

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