Angular MCQs with answers Page - 5

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 Angular concept allows a component to be used without being declared in a module?

  • (A) Dynamic component
  • (B) Standalone component
  • (C) Lazy-loaded component
  • (D) Global component
💬 Discuss
✅ Correct Answer: (B) Standalone component
Explanation: Standalone components can be used without being declared in an NgModule.

Published by Mr. Dubey ⭐ 111.54K Points at 08-Jun-2025 11:44 am in Angular

Q. Which RxJS operator is used to transform emitted items from an observable?

  • (A) catchError
  • (B) map
  • (C) filter
  • (D) tap
💬 Discuss
✅ Correct Answer: (B) map
Explanation: The `map` operator transforms the emitted items of an Observable.

Published by Mr. Dubey ⭐ 111.54K Points at 08-Jun-2025 11:44 am in Angular

Q. What is the purpose of a Resolver in Angular routing?

  • (A) To restrict access to routes
  • (B) To fetch data before route activation
  • (C) To log route changes
  • (D) To handle errors in routing
💬 Discuss
✅ Correct Answer: (B) To fetch data before route activation
Explanation: Resolvers pre-fetch data required for a route before the route activates.

Published by Mr. Dubey ⭐ 111.54K Points at 08-Jun-2025 11:44 am in Angular

Q. Which method is used to register a route guard in Angular?

  • (A) canActivate
  • (B) registerGuard
  • (C) useGuard
  • (D) setRouteGuard
💬 Discuss
✅ Correct Answer: (A) canActivate
Explanation: `canActivate` is used to control access to routes using guards.

Published by Mr. Dubey ⭐ 111.54K Points at 08-Jun-2025 11:44 am in Angular

Q. Which directive is used to apply dynamic styles in Angular?

  • (A) ngStyle
  • (B) ngIf
  • (C) ngSwitch
  • (D) ngClass
💬 Discuss
✅ Correct Answer: (A) ngStyle
Explanation: ngStyle is used to bind dynamic inline styles.

Published by Mr. Dubey ⭐ 111.54K Points at 08-Jun-2025 11:44 am in Angular

Q. What is the role of the 'trackBy' function in *ngFor?

  • (A) To filter items
  • (B) To style items
  • (C) To improve performance by tracking item identity
  • (D) To prevent rendering
💬 Discuss
✅ Correct Answer: (C) To improve performance by tracking item identity
Explanation: trackBy improves performance by tracking the identity of items.

Published by Mr. Dubey ⭐ 111.54K Points at 08-Jun-2025 11:44 am in Angular

Q. What is the default ChangeDetectionStrategy in Angular?

  • (A) Manual
  • (B) Optimized
  • (C) OnPush
  • (D) Default
💬 Discuss
✅ Correct Answer: (D) Default
Explanation: Angular uses the Default change detection strategy unless OnPush is specified.

Published by Mr. Dubey ⭐ 111.54K Points at 08-Jun-2025 11:44 am in Angular

Q. What is used to perform unit testing in Angular?

  • (A) Karma and Jasmine
  • (B) Mocha and Chai
  • (C) Jest and Enzyme
  • (D) QUnit and Sinon
💬 Discuss
✅ Correct Answer: (A) Karma and Jasmine
Explanation: Karma is the test runner and Jasmine is the testing framework used by Angular.

Published by Mr. Dubey ⭐ 111.54K Points at 08-Jun-2025 11:44 am in Angular

Q. Which keyword is used for dependency injection in a constructor?

  • (A) inject
  • (B) import
  • (C) private/public/protected
  • (D) new
💬 Discuss
✅ Correct Answer: (C) private/public/protected
Explanation: Access modifiers like private/public allow Angular to inject services into constructors.

Published by Mr. Dubey ⭐ 111.54K Points at 08-Jun-2025 11:44 am in Angular

Q. What does Angular use internally for reactivity and asynchronous programming?

  • (A) Promises
  • (B) Observables
  • (C) Callbacks
  • (D) async/await
💬 Discuss
✅ Correct Answer: (B) Observables
Explanation: Angular uses Observables (RxJS) for handling async data streams.

Published by Mr. Dubey ⭐ 111.54K Points at 08-Jun-2025 11:44 am in Angular

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