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 How many instances of service will be created if you provide a custom service in two components’ “providers” section of @Component decorator?
- 1
- 2
- 3
- 4
3/25 Custom pipe can modify actual value of variable apart from different presention in HTML.
- True
- False
4/25 Which component represents “target/host” DOM element inside Directive’s constructor?
- Element
- ElementRef
- Host
- Target
5/25 Which decorator does the directive use to listen to the host/target events?
- @Listener
- @HostListener
- @OnListener
- @TargetListener
6/25 Which wild card is used to define the page not found route?
- *
- **
- 404
- ^
7/25 There can be more than one <router-outlet> element in Angular application.
- True
- False
8/25 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
9/25 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
10/25 What Angular decorator is used to inject a dependency into a class?
- @Inject
- @Input
- @Output
- @Directive
11/25 Which command is used to update Angular to the latest version?
- ng update
- ng upgrade
- ng install latest
- ng new version
12/25 How does Angular handle form validation for reactive forms?
- Using directives
- Using validators in form control instances
- Using HTML5 attributes
- Using CSS classes
13/25 In Angular, which decorator is used to listen to DOM events?
- @HostBinding
- @HostListener
- @ViewChild
- @Input
14/25 What is the use of the 'ngFor' directive in Angular?
- To create a custom event
- To repeat a template for each item in a list
- To hide or show an element
- To bind data to a property
15/25 Which Angular feature is used for communication between non-related components?
- Input and Output decorators
- Services and Dependency Injection
- Directives
- Local storage
16/25 Which decorator is used for creating a new instance of a service in Angular?
- @Injectable({ providedIn: 'root' })
- @Component
- @NgModule
- @Directive
17/25 Which command is used to add Angular Material to an Angular project?
- ng add @angular/material
- ng install @angular/material
- ng generate @angular/material
- ng update @angular/material
18/25 In Angular, what is the primary use of the 'environment.ts' file?
- To store global variables
- To configure routing
- To define components
- To manage styles and themes
19/25 How can you implement internationalization (i18n) in an Angular application?
- Using Angular CLI's i18n tools
- Through CSS
- Using external libraries only
- By defining multiple components for each language
20/25 Which Angular CLI command is used to generate a service?
- ng generate service
- ng create service
- ng add service
- ng new service
21/25 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
22/25 How can you create a custom validator for a form field in Angular?
- By using an HTML attribute
- By creating a function that returns a validation object
- By using CSS
- By using the 'validator' directive
23/25 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
24/25 In Angular, how is content projection achieved?
- Using the <ng-content> tag
- Using the <ng-container> tag
- Using the <ng-template> tag
- Using the <content> tag
25/25 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
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Angular Basics

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

2/25 How many instances of service will be created if you provide a custom service in two components’ “providers” section of @Component decorator?

3/25 Custom pipe can modify actual value of variable apart from different presention in HTML.

4/25 Which component represents “target/host” DOM element inside Directive’s constructor?

5/25 Which decorator does the directive use to listen to the host/target events?

6/25 Which wild card is used to define the page not found route?

7/25 There can be more than one <router-outlet> element in Angular application.

8/25 What is the purpose of 'resolve' guard in Angular routing?

9/25 What is the purpose of the 'ng build --prod' command?

10/25 What Angular decorator is used to inject a dependency into a class?

11/25 Which command is used to update Angular to the latest version?

12/25 How does Angular handle form validation for reactive forms?

13/25 In Angular, which decorator is used to listen to DOM events?

14/25 What is the use of the 'ngFor' directive in Angular?

15/25 Which Angular feature is used for communication between non-related components?

16/25 Which decorator is used for creating a new instance of a service in Angular?

17/25 Which command is used to add Angular Material to an Angular project?

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

19/25 How can you implement internationalization (i18n) in an Angular application?

20/25 Which Angular CLI command is used to generate a service?

21/25 In Angular, what is the primary role of the 'RouterLink' directive?

22/25 How can you create a custom validator for a form field in Angular?

23/25 What is the purpose of the 'async' pipe in Angular templates?

24/25 In Angular, how is content projection achieved?

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