Angular 4 Interview Questions and Answers

Angular 4 Interview Questions and Answers

Angular (“Angular 2+” or “Angular 2”) is a Typescript-based open-source front-end web application platform led by the Angular Team at Google and by a community of individuals and corporations. Angular is a complete rewrite from the same team that built AngularJS.

Angular 2 was released in late 2016 and brought Angular into the modern web with its desktop and mobile applications.

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Angular 4 is backward compatible with Angular 2. Angular 4 is a JavaScript framework for building web applications and apps in JavaScript, html, and TypeScript, which is a superset of JavaScript. Angular provides built-in features for animation, http service, and materials which in turn have features such as auto-complete, navigation, toolbar, menus, etc. The code is written in Typescript, which compiles to JavaScript and displays the same in the browser. The final version was released on March 23, 2017.

What is Angular?

What are the features of Angular version 4?

What’s new in Angular 4.3?

Can you explain Lifecycle hooks?

Can you explain how to set http request header in angular 4 and angular 2?

What is the Module?

Can you explain template in angular 4?

How to get and log an error in angular 4?

Write the CLI command to generate a component in Angular4?

Can you explain the component directory structure of angular 4?

Can you explain materials in Angular 4?

Can you explain ng-content Directive?

What is Dependency Injection in Angular 4?

What does a Subscribe method do in Angular 4?

What are the building blocks of Angular?

What is the purpose of NgModule?

What is the difference between a module's forRoot() and forChild() methods and why do you need it?

What kind of classes can you import in an angular module?

When will ngOnInit be called?

Can you define impure pipe?

Can you explain  async pipe?

What are the new features in Angular 6?

What are the changes in Angular 6?