Angular MCQ Questions with answers and solutions Page 9

Q. What is the purpose of Angular Signals introduced in Angular 16?

(A) To improve routing performance
(B) To replace RxJS Observables
(C) To track reactive values with fine-grained reactivity
(D) To cache HTTP responses

💬 Discuss

✅ Correct Answer: (C) To track reactive values with fine-grained reactivity

Explanation: Angular Signals provide reactive primitives that allow better change detection and reactivity.

Published by Mr. Dubey ⭐ 111.54K Points at 08-Jun-2025 11:46 am in Angular

Q. Which command is used to create a new Angular standalone component?

(A) ng generate component
(B) ng new component
(C) ng generate component --standalone
(D) ng create standalone-component

💬 Discuss

✅ Correct Answer: (C) ng generate component --standalone

Explanation: The `--standalone` flag creates a standalone component without needing to declare it in a module.

Published by Mr. Dubey ⭐ 111.54K Points at 08-Jun-2025 11:46 am in Angular

Q. Which operator is commonly used in Angular with Observables to unsubscribe automatically?

(A) subscribe()
(B) finalize()
(C) takeUntil()
(D) switchMap()

💬 Discuss

✅ Correct Answer: (C) takeUntil()

Explanation: `takeUntil` allows automatic unsubscription when a signal (e.g. destroy$) emits.

Published by Mr. Dubey ⭐ 111.54K Points at 08-Jun-2025 11:46 am in Angular

Q. How do you define a route parameter in Angular routing?

(A) { path: 'user:id', component: UserComponent }
(B) { path: 'user/:id', component: UserComponent }
(C) { path: 'user/id', component: UserComponent }
(D) { path: 'user?=id', component: UserComponent }

💬 Discuss

✅ Correct Answer: (B) { path: 'user/:id', component: UserComponent }

Explanation: Colon (:) syntax is used to define route parameters in Angular.

Published by Mr. Dubey ⭐ 111.54K Points at 08-Jun-2025 11:46 am in Angular

Q. What is the primary use of the Angular TestBed utility?

(A) Creating services
(B) Routing between components
(C) Unit testing Angular components
(D) Handling change detection

💬 Discuss

✅ Correct Answer: (C) Unit testing Angular components

Explanation: TestBed is used to configure and initialize environments for unit testing.

Published by Mr. Dubey ⭐ 111.54K Points at 08-Jun-2025 11:46 am in Angular

Q. Which lifecycle hook is triggered every time Angular checks for changes?

(A) ngOnInit
(B) ngDoCheck
(C) ngAfterViewInit
(D) ngOnDestroy

💬 Discuss

✅ Correct Answer: (B) ngDoCheck

Explanation: ngDoCheck is called on every change detection run.

Published by Mr. Dubey ⭐ 111.54K Points at 08-Jun-2025 11:46 am in Angular

Q. How do you access query parameters in an Angular component?

(A) this.route.snapshot.queryParams
(B) this.router.queryParams
(C) window.location.queryParams
(D) this.queryParams.get()

💬 Discuss

✅ Correct Answer: (A) this.route.snapshot.queryParams

Explanation: You can access query parameters using ActivatedRoute's snapshot.queryParams.

Published by Mr. Dubey ⭐ 111.54K Points at 08-Jun-2025 11:46 am in Angular

Q. Which Angular feature ensures that a module or component is loaded only when needed?

(A) Preloading strategy
(B) Eager loading
(C) Lazy loading
(D) Tree shaking

💬 Discuss

✅ Correct Answer: (C) Lazy loading

Explanation: Lazy loading delays loading of a module/component until it's needed.

Published by Mr. Dubey ⭐ 111.54K Points at 08-Jun-2025 11:46 am in Angular

Q. What is a structural directive in Angular?

(A) A directive that changes CSS styles
(B) A directive that changes layout by adding/removing DOM elements
(C) A directive that logs events
(D) A directive that handles animations

💬 Discuss

✅ Correct Answer: (B) A directive that changes layout by adding/removing DOM elements

Explanation: Structural directives like *ngIf or *ngFor modify the DOM layout.

Published by Mr. Dubey ⭐ 111.54K Points at 08-Jun-2025 11:46 am in Angular

Q. What does the `resolve` property in Angular routes do?

(A) Prevents unauthorized users from accessing a route
(B) Handles 404 errors
(C) Fetches data before the route is activated
(D) Redirects users after login

💬 Discuss

✅ Correct Answer: (C) Fetches data before the route is activated

Explanation: `resolve` lets you fetch required data before the route loads.

Published by Mr. Dubey ⭐ 111.54K Points at 08-Jun-2025 11:46 am in Angular

Angular MCQs with answers Page - 9

Q. What is the purpose of Angular Signals introduced in Angular 16?

Q. Which command is used to create a new Angular standalone component?

Q. Which operator is commonly used in Angular with Observables to unsubscribe automatically?

Q. How do you define a route parameter in Angular routing?

Q. What is the primary use of the Angular TestBed utility?

Q. Which lifecycle hook is triggered every time Angular checks for changes?

Q. How do you access query parameters in an Angular component?

Q. Which Angular feature ensures that a module or component is loaded only when needed?

Q. What is a structural directive in Angular?

Q. What does the `resolve` property in Angular routes do?

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