Angular MCQ Questions with answers and solutions Page 8

Q. What does the 'async' pipe do when the observable emits a new value?

(A) It unsubscribes automatically
(B) It logs the value
(C) It updates the view automatically
(D) It refreshes the page

💬 Discuss

✅ Correct Answer: (C) It updates the view automatically

Explanation: The async pipe updates the DOM when a new value is emitted.

Published by Mr. Dubey ⭐ 111.54K Points at 08-Jun-2025 11:45 am in Angular

Q. How do you navigate to another route in Angular programmatically?

(A) location.href = '/route'
(B) this.route.go('/route')
(C) this.router.navigate(['/route'])
(D) window.location.replace('/route')

💬 Discuss

✅ Correct Answer: (C) this.router.navigate(['/route'])

Explanation: Use the Router service’s `navigate` method to change routes programmatically.

Published by Mr. Dubey ⭐ 111.54K Points at 08-Jun-2025 11:45 am in Angular

Q. What is a feature module in Angular?

(A) A module that handles authentication only
(B) A module created using CLI
(C) A module that focuses on a specific feature
(D) The root module of the app

💬 Discuss

✅ Correct Answer: (C) A module that focuses on a specific feature

Explanation: Feature modules group code related to a particular feature.

Published by Mr. Dubey ⭐ 111.54K Points at 08-Jun-2025 11:45 am in Angular

Q. What is the key advantage of lazy loading in Angular?

(A) Reduces API load
(B) Improves security
(C) Reduces initial load time
(D) Improves build size

💬 Discuss

✅ Correct Answer: (C) Reduces initial load time

Explanation: Lazy loading loads modules only when needed, reducing initial bundle size.

Published by Mr. Dubey ⭐ 111.54K Points at 08-Jun-2025 11:45 am in Angular

Q. How do you protect a route from unauthorized access?

(A) Use ngIf in the template
(B) Use ngStyle
(C) Use CanActivate guard
(D) Use ngSwitch

💬 Discuss

✅ Correct Answer: (C) Use CanActivate guard

Explanation: CanActivate guard determines if a route can be activated based on conditions.

Published by Mr. Dubey ⭐ 111.54K Points at 08-Jun-2025 11:45 am in Angular

Q. What is the purpose of NgZone in Angular?

(A) To create zones for routing
(B) To manage service injection
(C) To run code outside Angular’s zone and improve performance
(D) To render templates faster

💬 Discuss

✅ Correct Answer: (C) To run code outside Angular’s zone and improve performance

Explanation: NgZone lets you run code outside Angular's change detection for performance gains.

Published by Mr. Dubey ⭐ 111.54K Points at 08-Jun-2025 11:45 am in Angular

Q. Which Angular directive conditionally includes or removes an element in the DOM?

(A) *ngFor
(B) *ngSwitch
(C) *ngIf
(D) ngStyle

💬 Discuss

✅ Correct Answer: (C) *ngIf

Explanation: *ngIf adds or removes elements based on a condition.

Published by Mr. Dubey ⭐ 111.54K Points at 08-Jun-2025 11:45 am in Angular

Q. What is the role of the RouterModule.forRoot() method?

(A) To create a new module
(B) To define routes at the root level
(C) To provide form support
(D) To register a service globally

💬 Discuss

✅ Correct Answer: (B) To define routes at the root level

Explanation: RouterModule.forRoot() sets up routing for the root app module.

Published by Mr. Dubey ⭐ 111.54K Points at 08-Jun-2025 11:45 am in Angular

Q. Which Angular concept makes the app reactive and supports stateful behaviors?

(A) Template Binding
(B) Zone.js
(C) RxJS Observables
(D) NgModel

💬 Discuss

✅ Correct Answer: (C) RxJS Observables

Explanation: Angular’s reactivity is powered by RxJS Observables.

Published by Mr. Dubey ⭐ 111.54K Points at 08-Jun-2025 11:45 am in Angular

Q. What is the purpose of the 'ng-template' element in Angular?

(A) To create standalone components
(B) To hold reusable HTML code
(C) To mark content for dynamic rendering
(D) To style child components

💬 Discuss

✅ Correct Answer: (C) To mark content for dynamic rendering

Explanation: ng-template holds content that will be rendered conditionally or dynamically.

Published by Mr. Dubey ⭐ 111.54K Points at 08-Jun-2025 11:45 am in Angular

Angular MCQs with answers Page - 8

Q. What does the 'async' pipe do when the observable emits a new value?

Q. How do you navigate to another route in Angular programmatically?

Q. What is a feature module in Angular?

Q. What is the key advantage of lazy loading in Angular?

Q. How do you protect a route from unauthorized access?

Q. What is the purpose of NgZone in Angular?

Q. Which Angular directive conditionally includes or removes an element in the DOM?

Q. What is the role of the RouterModule.forRoot() method?

Q. Which Angular concept makes the app reactive and supports stateful behaviors?

Q. What is the purpose of the 'ng-template' element in Angular?

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