Angular JS MCQs with answers Page - 9

Here, you will find a collection of MCQ questions on Angular JS. Go through these questions to enhance your preparation for upcoming examinations and interviews.

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Q. What is the purpose of Angular Signals introduced in Angular 16?

  • (A) To improve routing performance
  • (B) To replace RxJS Observables
  • (C) To track reactive values with fine-grained reactivity
  • (D) To cache HTTP responses

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Q. Which command is used to create a new Angular standalone component?

  • (A) ng generate component
  • (B) ng new component
  • (C) ng generate component --standalone
  • (D) ng create standalone-component

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Q. Which operator is commonly used in Angular with Observables to unsubscribe automatically?

  • (A) subscribe()
  • (B) finalize()
  • (C) takeUntil()
  • (D) switchMap()

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Q. How do you define a route parameter in Angular routing?

  • (A) { path: 'user:id', component: UserComponent }
  • (B) { path: 'user/:id', component: UserComponent }
  • (C) { path: 'user/id', component: UserComponent }
  • (D) { path: 'user?=id', component: UserComponent }

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Q. What is the primary use of the Angular TestBed utility?

  • (A) Creating services
  • (B) Routing between components
  • (C) Unit testing Angular components
  • (D) Handling change detection

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Q. Which lifecycle hook is triggered every time Angular checks for changes?

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

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Q. How do you access query parameters in an Angular component?

  • (A) this.route.snapshot.queryParams
  • (B) this.router.queryParams
  • (C) window.location.queryParams
  • (D) this.queryParams.get()

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Q. Which Angular feature ensures that a module or component is loaded only when needed?

  • (A) Preloading strategy
  • (B) Eager loading
  • (C) Lazy loading
  • (D) Tree shaking

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Q. What is a structural directive in Angular?

  • (A) A directive that changes CSS styles
  • (B) A directive that changes layout by adding/removing DOM elements
  • (C) A directive that logs events
  • (D) A directive that handles animations

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Q. What does the `resolve` property in Angular routes do?

  • (A) Prevents unauthorized users from accessing a route
  • (B) Handles 404 errors
  • (C) Fetches data before the route is activated
  • (D) Redirects users after login

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