Angular Quiz Review
A component can have a child route defined using what property?
children
What angular decorator allows us to define the pipe name that is globally available for use in any template across the application?
pipe
What can be said about TypeScript?
Angular is based on TypeScript. This is a superset of JavaScript. TypeScript is maintained by Microsoft.
What decorator does the directive use to listen to the host/target events?
@HostListener
What form control class name gets set to true via [(ngModel)] whenever value is modified?
.ng-dirty
If you provide a custom service in two components' "providers" section of @Component decorator, how many instances of service shall get created?
2
In Angular routing, what tag is used to render matched component via active route?
<router-outlet></router-outlet>
In Angular, you can pass data from parent component to child component using what?
@Input()
What is the decorator used for configuring your module class?
@NgModule
In Angular, you can pass data from child component to parent component using what?
@Output()
Router is part of which module?
@angular/router
What wild card do you use to define a page not found route.
A double asterisk "**"
You can create local HTML reference of HTML tag using variable which starts with what character?
A pound/number sign "#"
Why would a Microservices Architecture be beneficial?
A suite of services can be deployed and upgraded without a rebuild of other, functioning services. Less service interruption for fast-paced cloud computing. Different parts of a development team can manage individual parts of a microservice.
What service can be used to extract route parameters inside a component?
ActivatedRoute
What are some microservice features?
Componentization. Decoupling. Fault tolerance.
What component represents a "target/host" DOM element inside a Directive's constructor?
ElementRef
One component can be declared inside more than one NgModule. True or False?
False
Custom pipe can modify actual value of variable apart from different presentation in HTML. True or False?
False.
A directive which modifies DOM hierarchy is called
Hierarchical directive
To use HttpClient component you need to import what module?
HttpClientModule
Is router a part of @angular/core?
No.
The HTTP service's get/put/post/delete function returns what?
Observable
We need to call below method of RouterModule for providing all routes in AppModule.
RouterModule.forRoot
What does subscribe do?
Streams data in synchronously.
How Observables are Used?
The Reactive Forms Module uses reactive programming and Observables for listening to user input The @output() decorator in a component takes an EventEmitter instance. EventEmitter is a subclass of the RxJS Observable
Which character is used for chaining multiple pipes?
The pipe "|"
There can be more than one <router-outlet> element in angular application. True or False?
True
Async Pipe subscribes to observer and update expression whenever there is data sent from observer. True or False?
True.
Observer sends data to multiple clients via what method?
next()
What command do you run to build an Angular application in production mode?
ng build -prod
Below command is used to run Static Code analysis of Angular application
ng lint
What is a couple of application life cycles?
ngOnChanges ngOnInit
