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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📊 Angular
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.

📊 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.

📊 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.

📊 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.

📊 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.

📊 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.

📊 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.

📊 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.

📊 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.

📊 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.

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