angular and json

Question 1

Which Angular lifecycle hook is called once when the component is created?

a. ngOnInit()

b. ngOnChanges()

c. ngDoCheck()

d. ngAfterViewInit()

Answer 1

a. ngOnInit()

Question 2

What is the correct syntax for using ngFor to repeat a list of items in Angular?

a. html

<div>
{{ item }}
</div>

b. html

<div *ngFor=”let item of items”>
{{ item }}
</div>

c. html

<div>
{{ item }}
</div>

d. html

<div *ng-repeat=”item in items”>
{{ item }}
</div>

Answer 2

b. html

<div *ngFor=”let item of items”>
{{ item }}
</div>

Question 3

In Angular, which directive is used to conditionally add or remove an element?

a. ngFor

b. ngClass

c. ngStyle

d. ngIf

Answer 3

d. ngIf

Question 4

In Angular, which binding type allows us to listen for and respond to user events?

a. property binding

b. interpolation binding

c. event binding

d. two-way binding

Answer 4

c. event binding

Question 5

Which Angular Material component is used to create a responsive navigation menu?

a. mat-toolbar

b. mat-menu

c. mat-sidenav

d. mat-grid-list

Answer 5

c. mat-sidenav

Question 6

Which Angular Material component is used to display a tabbed navigation interface?

a. mat-nav

b. mat-toolbar

c. mat-sidenav

d. mat-tab-group

Answer 6

d. mat-tab-group

Question 7

Which lifecycle hook in Angular is called after Angular initializes the component’s views and child views?

a. ngOnInit

b. ngAfterViewInit

c. ngDoCheck

d. ngAfterContentInit

Answer 7

b. ngAfterViewInit