Angular Multiple Choice Questions (MCQs) and Answers

To automatically generate form components

To create complex form validation rules

To provide a shorthand for creating form groups and form controls

To synchronize form data with the backend

ngModel

ngControl

formControl

ngForm

FormGroup

FormControlArray

FormControl

FormBuilder

The ngModel directive is not imported

The form is not linked to the component

The input type is incompatible with ngModel

The component property is not correctly bound to ngModel

Incorrect form control validation rules

Missing form control in the group

Incorrect data type for the form control

Form control not bound to the form

Managing local state

Interacting with RESTful APIs

Styling components

Handling authentication

To observe changes in form control values

To handle asynchronous data such as HTTP responses

To watch changes in component properties

To monitor routing events

Using the .subscribe() method

With the async pipe in the template

Through a service

Using a callback function

To execute the Observable

To transform the data emitted by the Observable

To debug the Observable

To create a new Observable

.get()

.post()

.send()

.fetch()

Using the catchError operator in the pipe function

With a try-catch block

By checking the status code in the response

Using an error event handler

The URL of the request

The headers of the request

The status of the server

The configuration of HttpClient

The Observable is not subscribed to

The server is not responding

There's a syntax error in the Observable creation

The response type is incorrect

To navigate between different components

To transform data for display

To manage state

To handle user input

numberPipe

datePipe

currencyPipe

jsonPipe

{{ value | pipeName }}

[value | pipeName]

{{ value } & pipeName}

{{ value: pipeName }}

To add new features to the Angular framework

To create reusable transformations specific to the application

To replace the built-in pipes

To optimize the application's performance

uppercasePipe

lowercasePipe

stringPipe

capitalizePipe

Using the @Pipe decorator and implementing the PipeTransform interface

By extending a built-in pipe

By declaring it in a module

Using a service

The pipe is not stateful

The input is not correctly bound

The pipe is not declared in a module

The pipe's transform method is incorrect

Incorrect implementation of the PipeTransform interface

Syntax error in the template

Incorrect input types for the pipe

The pipe is not included in the module declarations

ngOnInit()

ngOnChanges()

ngAfterViewInit()

ngOnDestroy()

ngOnChanges()

ngOnInit()

ngAfterContentChecked()

ngAfterViewChecked()

To clean up the component before its destruction

To react to the initialization of the component's views

To handle changes after the view is checked

To execute code after the component's content is initialized

It provides a method to store component state

It is used to perform custom initialization logic

It is called before Angular destroys the component

It initializes the component's child elements

When you need to react after Angular checks the content projected into the component

To modify component properties after they are checked

Before the view is initialized

After the component is destroyed

ngOnInit()

ngOnChanges()

ngOnDestroy()

ngAfterViewInit()

Implement the ngAfterViewInit lifecycle hook

Use the ngOnInit lifecycle hook

Check the view in the ngOnChanges hook

Observe changes in the DOM

Implement the ngOnChanges lifecycle hook

Use a setter for the input property

Use the ngOnInit lifecycle hook

Observe changes in the component's state

ngOnChanges()

ngOnInit()

ngAfterViewInit()

ngDoCheck()