Angular MCQs with answers Page - 4

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. What does Angular use for dependency injection?

  • (A) Injector class
  • (B) Service class
  • (C) DI container
  • (D) Zone.js
💬 Discuss
✅ Correct Answer: (A) Injector class
Explanation: Angular uses the Injector class to inject dependencies.

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

Q. Which decorator is used to emit events to parent components?

  • (A) @Input
  • (B) @Output
  • (C) @Injectable
  • (D) @NgModule
💬 Discuss
✅ Correct Answer: (B) @Output
Explanation: @Output is used to emit custom events to parent components.

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

Q. What symbol is used to denote event binding?

  • (A) []
  • (B) ()
  • (C) [()]
  • (D) {}
💬 Discuss
✅ Correct Answer: (B) ()
Explanation: Parentheses () are used for event binding in Angular.

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

Q. Which concept ensures code modularity in Angular?

  • (A) Components
  • (B) Modules
  • (C) Directives
  • (D) Pipes
💬 Discuss
✅ Correct Answer: (B) Modules
Explanation: Modules group related code and ensure modular architecture.

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

Q. How is the root component of Angular app identified?

  • (A) It uses @NgModule
  • (B) It is declared in main.ts
  • (C) It is listed in bootstrap array in AppModule
  • (D) It is named root.component.ts
💬 Discuss
✅ Correct Answer: (C) It is listed in bootstrap array in AppModule
Explanation: The root component is listed in the bootstrap array of AppModule.

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

Q. What does `ngOnChanges` do?

  • (A) Executes when the app starts
  • (B) Executes when input properties change
  • (C) Executes when the view is initialized
  • (D) Executes when the component is destroyed
💬 Discuss
✅ Correct Answer: (B) Executes when input properties change
Explanation: ngOnChanges is triggered when input property values change.

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

Q. What is Zone.js used for in Angular?

  • (A) Routing
  • (B) HTTP Requests
  • (C) Change detection
  • (D) State management
💬 Discuss
✅ Correct Answer: (C) Change detection
Explanation: Zone.js is used to detect changes and trigger Angular's change detection.

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

Q. Which Angular feature helps to lazy load modules?

  • (A) PreloadingStrategy
  • (B) Route Guards
  • (C) loadChildren
  • (D) NgSwitch
💬 Discuss
✅ Correct Answer: (C) loadChildren
Explanation: loadChildren enables lazy loading of Angular modules.

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

Q. Which Angular service handles navigation between views?

  • (A) ViewService
  • (B) HttpClient
  • (C) Router
  • (D) NavigationService
💬 Discuss
✅ Correct Answer: (C) Router
Explanation: Angular's Router service handles navigation and routing.

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

Q. Which strategy improves Angular app performance by reducing change detection cycles?

  • (A) Default strategy
  • (B) Manual rendering
  • (C) OnPush strategy
  • (D) Detached strategy
💬 Discuss
✅ Correct Answer: (C) OnPush strategy
Explanation: OnPush change detection strategy improves performance by checking only when inputs change.

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

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