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Angular CreditCardModule Quiz

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Questions and Answers

What is the purpose of @Input() decorator in Angular?

To allow data flow from child components to parent components
To allow data flow from parent components to child components (correct)
To log messages from one component to another
To serve as a way of passing data up the component tree

Which Angular CLI command is used to build an Angular project for deployment?

ng run
ng serve
ng deploy
ng build (correct)

What does the @Output() decorator do in Angular?

Allows data flow from parent components to child components
Serves as a way of passing data down the component tree
Allows child components to emit events to parent components (correct)
Logs messages between components

Which decorator in Angular is used to access child components in parent components?

@ViewChild (B) Signup and view all the answers

What is the main purpose of @ViewChild decorator in Angular?

To access child components within a parent component (D) Signup and view all the answers

Which of the following is NOT a decorator used for Angular components?

@Injectable (D) Signup and view all the answers

Why is CommonModule imported instead of BrowserModule in the given Angular module?

CommonModule only exports common directives and pipes. (D) Signup and view all the answers

What is the purpose of declaring CreditCardMaskPipe and CreditCardComponent in the CreditCardModule?

To register the components with Angular's dependency injection system. (D) Signup and view all the answers

Why is the CreditCardService provided in the CreditCardModule?

To make the service available throughout the application. (B) Signup and view all the answers

In which file would you import the CreditCardModule to make use of its components in an Angular application?

app.module.ts (D) Signup and view all the answers

What is the purpose of the @NgModule decorator in Angular?

To define a class as an Angular module. (D) Signup and view all the answers

Which Angular CLI command can be used to generate a component and register it in a specific module simultaneously?

<code>ng generate component myComponent --module=app.module</code> (D) Signup and view all the answers

What is the purpose of styleUrls in Angular components?

To import external stylesheets for the component (A) Signup and view all the answers

How are CSS styles scoped in Angular components?

They are scoped to the component only, not affecting other elements outside (B) Signup and view all the answers

What is the purpose of interfaces in Angular?

To define the shape of an object and maintain consistency in class structures (D) Signup and view all the answers

Where can CSS styles be included for an Angular component?

In separate CSS files, inline in the component definition, or globally for the application (C) Signup and view all the answers

What does the ng build command do in Angular CLI?

Builds and bundles the application for deployment (A) Signup and view all the answers

Which option best describes how components can be used in Angular applications?

Components can be composed together to build complex user interfaces and promote code reusability (D) Signup and view all the answers

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