Angular Basics

1/25 What will be the result of the below program?
```
function f(input: boolean) {

let a = 100;

if (input) {

let b = a + 1;

}

return b;

}
```
- Undefined
- 101
- Compilation error for a
- Compilation error for b
2/25 In Angular, you can pass data from the child component to the parent component by using:
- @Output()
- @Input()
- Input
- Output
3/25 Which directive modifies DOM hierarchy?
- Structural directive
- Attribute directive
4/25 Which is the correct form control class name that is set to true via [(ngModel)] whenever value is changed?
- .ng-invalid
- .ng-pending
- .ng-pristine
- .ng-dirty
5/25 In Angular routing, which tag is used to render matched component via active route?
- <router></router>
- <router-output></router-output>
- <router-outlet></router-outlet>
- <router-display></router-display>
6/25 Which method of RouterModule should be called for providing all routes in AppModule?
- RouterModule.forChild
- RouterModule.forRoot
- RouterModule
- RouterModule.import
7/25 Async Pipe subscribes to observer and updates expression whenever there is data sent from observer.
- True
- False
8/25 Which command is used to run the Static Code analysis of Angular application?
- ng build
- ng profile
- ng lint
- ng serve
9/25 What is the purpose of 'resolve' guard in Angular routing?
- To prevent navigation to a route
- To preload data for a component
- To authorize user access to a route
- To lazy load a module
10/25 How do you implement form validation in Angular?
- Using Angular Forms Module
- Using CSS
- Using JavaScript functions
- Using Web APIs
11/25 What is the purpose of the 'ng build --prod' command?
- To run the application in development mode
- To deploy the application to a server
- To build the application for production with optimization
- To compile TypeScript files
12/25 In Angular, what is the purpose of the 'ng-container' tag?
- To create a new DOM element
- To conditionally group elements without adding extra DOM nodes
- To enhance performance
- To interact with external APIs
13/25 What is the role of 'NgZone' in Angular?
- Managing the data flow
- Interacting with RESTful services
- Optimizing performance by controlling change detection
- Routing and navigation
14/25 What is the primary use of 'Subject' in RxJS as used in Angular?
- To create an observable
- To create a promise
- To perform HTTP requests
- To manage state
15/25 Which Angular lifecycle hook is called after Angular fully initializes a component's view?
- ngOnInit
- ngAfterViewInit
- ngOnChanges
- ngOnDestroy
16/25 In Angular, what is the primary role of the 'RouterLink' directive?
- To link to external websites
- To navigate between different views
- To reload the current page
- To pass data to routes
17/25 In Angular, which command is used to generate a new lazy-loaded feature module?
```
ng generate module <module-name> --route <route-name> --module <parent-module>
```
- True
- False
18/25 In Angular, what is the use of the 'environment.prod.ts' file?
- To define production-specific variables
- To configure routing in production
- To override component styles in production
- To list production-only dependencies
19/25 What is the purpose of the 'ContentChildren' decorator in Angular?
- To query DOM elements in the template
- To bind data to child components
- To access child components or directives from a parent
- To create content projection slots
20/25 What is the purpose of the 'async' pipe in Angular templates?
- To create asynchronous methods
- To automatically unsubscribe from Observables
- To delay the execution of functions
- To handle HTTP requests asynchronously
21/25 What is the purpose of the 'CanDeactivate' guard in Angular routing?
- To prevent unauthorized access to a route
- To preload data before navigating to a route
- To confirm navigation away from the current route
- To dynamically load modules for a route
22/25 What is the primary function of the 'Renderer2' service in Angular?
- To perform server-side rendering
- To manage rendering of components
- To handle routing and navigation
- To render data-bound properties
23/25 In Angular, how are directives applied to HTML elements?
- Using HTML attributes
- By directly manipulating the DOM
- Using JavaScript functions
- Through Angular components
24/25 Which Angular CLI command is used to analyze the size of the application bundles?
```
ng build --prod --stats-json
```
- True
- False
25/25 In Angular, what is the purpose of the 'ng-template' directive?
- To define templates that can be used with structural directives
- To inject external HTML content
- To create reusable components
- To handle form submissions
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Angular Basics

1/25 What will be the result of the below program?

2/25 In Angular, you can pass data from the child component to the parent component by using:

3/25 Which directive modifies DOM hierarchy?

4/25 Which is the correct form control class name that is set to true via [(ngModel)] whenever value is changed?

5/25 In Angular routing, which tag is used to render matched component via active route?

6/25 Which method of RouterModule should be called for providing all routes in AppModule?

7/25 Async Pipe subscribes to observer and updates expression whenever there is data sent from observer.

8/25 Which command is used to run the Static Code analysis of Angular application?

9/25 What is the purpose of 'resolve' guard in Angular routing?

10/25 How do you implement form validation in Angular?

11/25 What is the purpose of the 'ng build --prod' command?

12/25 In Angular, what is the purpose of the 'ng-container' tag?

13/25 What is the role of 'NgZone' in Angular?

14/25 What is the primary use of 'Subject' in RxJS as used in Angular?

15/25 Which Angular lifecycle hook is called after Angular fully initializes a component's view?

16/25 In Angular, what is the primary role of the 'RouterLink' directive?

17/25 In Angular, which command is used to generate a new lazy-loaded feature module?

18/25 In Angular, what is the use of the 'environment.prod.ts' file?

19/25 What is the purpose of the 'ContentChildren' decorator in Angular?

20/25 What is the purpose of the 'async' pipe in Angular templates?

21/25 What is the purpose of the 'CanDeactivate' guard in Angular routing?

22/25 What is the primary function of the 'Renderer2' service in Angular?

23/25 In Angular, how are directives applied to HTML elements?

24/25 Which Angular CLI command is used to analyze the size of the application bundles?

25/25 In Angular, what is the purpose of the 'ng-template' directive?