What command creates a new Angular project using the CLI?

• ng make
• ng new
• ng init
• ng start

What is the main building block of Angular?

• Module
• Directive
• Component
• Template

Which file defines the root module in Angular?

• main.ts
• index.html
• app.component.ts
• app.module.ts

Which symbol is used for interpolation in Angular?

• {{ }}
• [[ ]]
• (( ))
• <%= %>

What directive is used to loop over a list in Angular?

• *ngIf
• *ngSwitch
• *ngFor
• ngRepeat

Which lifecycle hook is called after Angular sets all input properties?

• ngInit
• ngOnInit
• ngAfterContentInit
• ngOnChanges

Which lifecycle hook is typically used to initialize data in a component?

• ngOnInit
• ngAfterViewInit
• ngDestroy
• ngStart

What decorator is used to access child components in a template?

• @Input
• @Output
• @ViewChild
• @HostBinding

Which directive allows projection of content into a component?

• ng-content
• *ngFor
• *ngIf
• ng-template

Which RxJS operator is used to switch to a new observable and cancel the previous one?

• map
• mergeMap
• switchMap
• filter

What is the benefit of using forRoot() in a module?

• Loads child routes
• Provides lazy loading
• Configures and provides singleton services
• Adds animations

What does lazy loading in Angular improve?

• Styling
• Testing
• Performance by reducing bundle size
• Form validation

Which strategy can preload selected modules after app load?

• Lazy loading
• PreloadAllModules
• NoPreloading
• Eager loading

What does switchMap do in RxJS?

• Maps to array
• Cancels previous observable
• Combines observables
• Retries observable

Which RxJS subject emits the last emitted value to new subscribers?

• Subject
• ReplaySubject
• BehaviorSubject
• AsyncSubject