Angular MCQs with answers Page - 15

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.
Share your questions by clicking Add Question

Q. Which RxJS operator is used to transform emitted values?

  • (A) filter
  • (B) map
  • (C) take
  • (D) merge
💬 Discuss
✅ Correct Answer: (B) map
Explanation: The `map` operator transforms each value emitted by an Observable.

Published by Mr. Dubey ⭐ 111.54K Points at 08-Jun-2025 11:48 am in Angular

Q. Which RxJS operator combines multiple Observables into one by emitting all values?

  • (A) combineLatest
  • (B) merge
  • (C) switchMap
  • (D) concat
💬 Discuss
✅ Correct Answer: (B) merge
Explanation: `merge` subscribes to multiple Observables and emits their values concurrently.

Published by Mr. Dubey ⭐ 111.54K Points at 08-Jun-2025 11:48 am in Angular

Q. Which RxJS operator cancels previous Observable when a new one is emitted?

  • (A) mergeMap
  • (B) concatMap
  • (C) switchMap
  • (D) flatMap
💬 Discuss
✅ Correct Answer: (C) switchMap
Explanation: `switchMap` cancels the previous inner Observable when a new one is emitted.

Published by Mr. Dubey ⭐ 111.54K Points at 08-Jun-2025 11:48 am in Angular

Q. Which RxJS operator limits the number of emissions?

  • (A) take
  • (B) skip
  • (C) debounceTime
  • (D) distinctUntilChanged
💬 Discuss
✅ Correct Answer: (A) take
Explanation: `take` limits the number of values emitted by the source Observable.

Published by Mr. Dubey ⭐ 111.54K Points at 08-Jun-2025 11:48 am in Angular

Q. Which decorator is used to inject dependencies in Angular?

  • (A) @Inject
  • (B) @Injectable
  • (C) @Input
  • (D) @Component
💬 Discuss
✅ Correct Answer: (B) @Injectable
Explanation: @Injectable marks a class as available to be injected as a dependency.

Published by Mr. Dubey ⭐ 111.54K Points at 08-Jun-2025 11:48 am in Angular

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

  • (A) CanLoad
  • (B) CanActivate
  • (C) Resolve
  • (D) Deactivate
💬 Discuss
✅ Correct Answer: (B) CanActivate
Explanation: CanActivate determines if a route can be accessed.

Published by Mr. Dubey ⭐ 111.54K Points at 08-Jun-2025 11:48 am in Angular

Q. Which guard checks before unloading a component?

  • (A) CanActivate
  • (B) CanLoad
  • (C) CanDeactivate
  • (D) Resolve
💬 Discuss
✅ Correct Answer: (C) CanDeactivate
Explanation: CanDeactivate is used to prevent users from leaving a component, e.g., with unsaved changes.

Published by Mr. Dubey ⭐ 111.54K Points at 08-Jun-2025 11:48 am in Angular

Q. Which command generates a new guard in Angular CLI?

  • (A) ng generate component
  • (B) ng generate guard
  • (C) ng guard
  • (D) ng add guard
💬 Discuss
✅ Correct Answer: (B) ng generate guard
Explanation: `ng generate guard` creates a new route guard in Angular.

Published by Mr. Dubey ⭐ 111.54K Points at 08-Jun-2025 11:48 am in Angular

Q. Which function is used to create route animations?

  • (A) state()
  • (B) trigger()
  • (C) transition()
  • (D) All of the above
💬 Discuss
✅ Correct Answer: (D) All of the above
Explanation: state(), trigger(), and transition() are used together to create Angular animations.

Published by Mr. Dubey ⭐ 111.54K Points at 08-Jun-2025 11:48 am in Angular

Q. Which Angular package supports internationalization?

  • (A) @angular/common/http
  • (B) @angular/forms
  • (C) @angular/localize
  • (D) @angular/compiler
💬 Discuss
✅ Correct Answer: (C) @angular/localize
Explanation: @angular/localize provides APIs and tools for internationalization (i18n).

Published by Mr. Dubey ⭐ 111.54K Points at 08-Jun-2025 11:48 am in Angular

Programming Categories

📱 Download Our App

Learn MCQs on the go with our easy-to-use Android app

Get it on Google Play