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 Which directive connects the value of the controls to the data?
- ng-app
- ng-init
- ng-model
3/25 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
4/25 Which command is used to run the Static Code analysis of Angular application?
- ng build
- ng profile
- ng lint
- ng serve
5/25 Router service needs to be explicitly provided in angular module to use it in another component via DI.
- True
- False
6/25 Which command must be used to build an application in production mode?
- ng build
- ng serve
- ng build --prod
- ng lint
7/25 Which decorator does the directive use to listen to the host/target events?
- @Listener
- @HostListener
- @OnListener
- @TargetListener
8/25 How can you access a parent component's property from a child component in Angular?
- Using @ViewChild decorator
- Using @Input() decorator
- Using @Output() decorator
- Using @Injectable decorator
9/25 In Angular, which service is commonly used for state management?
- HttpClient
- NgRx Store
- Router
- FormsModule
10/25 How is RxJS used in Angular for managing asynchronous data?
- Through Promises
- Through Observables
- Through Async/Await
- Through Callbacks
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 What is the main purpose of the 'async' pipe in Angular?
- To run functions asynchronously
- To automatically unsubscribe from observables
- To speed up the application
- To delay the execution of functions
13/25 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
14/25 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
15/25 How can you create a custom structural directive in Angular?
- Using the @Directive decorator
- Using the @Component decorator
- Using the @NgModule decorator
- Using the @Pipe decorator
16/25 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
17/25 How can you create a guard for lazy-loaded modules in Angular?
- Using @Guard decorator
- Using a service with CanLoad interface
- Using @Module decorator
- Using an observable
18/25 Which decorator is used for creating a new instance of a service in Angular?
- @Injectable({ providedIn: 'root' })
- @Component
- @NgModule
- @Directive
19/25 What is the main advantage of using Angular's HttpClient for API calls?
- Automatic conversion of JSON data
- Reduced need for importing modules
- Increased security
- Faster server response
20/25 In Angular, how can you handle HTTP request errors in a service?
- Using try-catch blocks
- Using the catchError operator in RxJS
- Using if-else statements
- By setting HTTP headers
21/25 In Angular, what is the purpose of the 'providers' array in '@NgModule'?
- To declare components
- To import other modules
- To provide services available to the module
- To export components and directives
22/25 What is the main benefit of using Angular's Reactive Forms over Template-Driven Forms?
- Easier syntax
- More control and flexibility in handling form logic
- Automatic data binding
- Built-in validators
23/25 In Angular, which decorator is used to create a new HTTP interceptor?
- @HttpInterceptor
- @Injectable
- @Interceptor
- @NgModule
24/25 How can Angular elements be used in a project?
- To create Angular-specific syntax in HTML
- To extend HTML with custom elements and behaviors
- To directly manipulate the DOM
- To integrate Angular with server-side rendering
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 Which directive connects the value of the controls to the data?

3/25 How many instances of service will be created if you provide a custom service in two components’ “providers” section of @Component decorator?

4/25 Which command is used to run the Static Code analysis of Angular application?

5/25 Router service needs to be explicitly provided in angular module to use it in another component via DI.

6/25 Which command must be used to build an application in production mode?

7/25 Which decorator does the directive use to listen to the host/target events?

8/25 How can you access a parent component's property from a child component in Angular?

9/25 In Angular, which service is commonly used for state management?

10/25 How is RxJS used in Angular for managing asynchronous data?

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

12/25 What is the main purpose of the 'async' pipe in Angular?

13/25 In Angular, what is the purpose of the 'ng-container' tag?

14/25 What is the role of 'NgZone' in Angular?

15/25 How can you create a custom structural directive in Angular?

16/25 What is the use of the 'ngFor' directive in Angular?

17/25 How can you create a guard for lazy-loaded modules in Angular?

18/25 Which decorator is used for creating a new instance of a service in Angular?

19/25 What is the main advantage of using Angular's HttpClient for API calls?

20/25 In Angular, how can you handle HTTP request errors in a service?

21/25 In Angular, what is the purpose of the 'providers' array in '@NgModule'?

22/25 What is the main benefit of using Angular's Reactive Forms over Template-Driven Forms?

23/25 In Angular, which decorator is used to create a new HTTP interceptor?

24/25 How can Angular elements be used in a project?

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