Angular 5 Interview Questions

Angular 5 supports four types of Data Binding They are

• String Interpolation
• Property Binding
• Event Binding
• Two-way-binding

 In Angular component life cycle in Angular goes through the following stages.

• Create
• Render
• Create and render children
• Check for bound data changes and re-render
• Destroy

Angular CLI is Command Line Interface for Angular that runs Webpack.You can use npm install -g @angular/cli command to install angular CLI.

NgModule is a decorator function in Angular that takes a single metadata object whose properties describe the module.

 double curly brackets like {{}} are used form data interpolation in Angular5.

Angular5 component is made of a Component decorator and a component definition of a class. ng generate component component_name command is used to generate a component in Angular5.

*ngFor directive is used for Iterating over a list of items and for Generating a new DOM element for each one.

 NPM stands for node package manager. It is used for installing dependencies for javascript packages.

In Angular5 $event is a reserved keyword that represents the data emitted by an event (event data).It is commonly used as a parameter for event based methods.

After installing Angular CLI run ng new project-name command to create a new Angular project.

Simply use below syntax to import a module in Angular5.

	import { ModuleName } from 'someWhere';
	

Transpiling is a process of converting code from one language to another. In Angular, Traceur compiler is used for converting TypeScript to JavaScript so that browsers can understand.

Also, Read Interview questions asked in React Js  Interviews

Decorators are functions that adds metadata to class members and functions. It was proposed in ES2016 and implemented in Typescript.