Angular Web Framework Components & Templates

Question 1

What is a component in Angular?

Accepted Answer

A TypeScript class with an HTML template and optional CSS that controls a portion of the UI

Answer

A database model for storing application data

Answer

A server-side API endpoint

Answer

A CSS framework for styling

Question 2

What is data binding in Angular?

Accepted Answer

The mechanism for synchronizing data between the component class and its template

Answer

A database connection configuration

Answer

A method for compressing data during transmission

Answer

A CSS property for text alignment

Question 3

What is the difference between interpolation and property binding?

Accepted Answer

Interpolation uses {{}} for text; property binding uses [] for DOM properties

Answer

They are identical features

Answer

Interpolation only works with numbers

Answer

Property binding only works with strings

Question 4

What are structural directives in Angular?

Accepted Answer

Directives like *ngIf and *ngFor that change the DOM layout by adding or removing elements

Answer

CSS classes applied to style elements

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TypeScript interfaces for data models

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Server-side rendering configurations

Question 5

What is the @Input() decorator used for?

Accepted Answer

To define a property that can receive data from a parent component

Answer

To get user keyboard input

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To read data from an input file

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To inject a service dependency

Question 6

What is the @Output() decorator and EventEmitter used for?

Accepted Answer

To emit custom events from a child component to its parent

Answer

To output data to the console

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To write files to the filesystem

Answer

To send HTTP responses