What are the interview questions for AngularJS?

What are the interview questions for AngularJS?

AngularJS Interview Questions for Freshers

• Define AngularJS and what are its key features?
• Define Scope in AngularJS.
• What do the services represent in AngularJS?
• What are directives?
• Explain the data binding process in AngularJS.
• Explain the purpose of interpolation in AngularJS?

How do I prepare for angular interview?

Tips for preparing for your interview The following tips can help you prepare for your Angular interview: Stay up-to-date with various programming languages, including JavaScript, TypeScript and HTML coding, as working within Angular can require the use of different language applications.

What should I ask in angular interview?

Angular Interview Questions

1. Why were client-side frameworks like Angular introduced?
2. How does an Angular application work?
3. What are some of the advantages of Angular over other frameworks?
4. List out differences between AngularJS and Angular.
5. What is AOT compilation?
6. Explain Components, Modules and Services in Angular.

What features enables Spa feature in AngularJS?

What are the benefits does SPA provide?

• Its UI is fast and responsive.
• IT contains more JavaScript code than actual HTML as compared to other applications.
• Dynamic data loading occurs from the server-side.
• It allows to pre-load and cache all the app pages.
• Applications written in AngularJS are cross-browser compliant.

What is DOM in Angular?

DOM stands for Document Object Model. AngularJS’s directives are used to bind application data to the attributes of HTML DOM elements.

What is the difference between controller and link in directives?

Answer:The link option is just a shortcut to setting up a post-link function. controller: The directive controller can be passed to another directive linking/compiling phase. It can be injected into other directices as a mean to use in inter-directive communication.

What is bootstrapping in Angular?

The process of loading the index. html page, app-level module, and app-level component is called bootstrapping, or loading the app. In this guide, you will learn about the internals of the bootstrapping process. Angular takes the following steps to bootstrap the application: Load index.

What is metadata in Angular?

Metadata is used to decorate a class so that it can configure the expected behavior of the class. Following are the different parts for metadata. Annotations − These are decorators at the class level. This is an array and an example having both the @Component and @Routes decorator.

What is ngOnInit in Angular?

ngOnInit()link A callback method that is invoked immediately after the default change detector has checked the directive’s data-bound properties for the first time, and before any of the view or content children have been checked. It is invoked only once when the directive is instantiated.

What is the difference between constructor and ngOnInit?

The constructor() should only be used to initialize class members but shouldn’t do actual “work”. So we should use constructor() to set up Dependency Injection, Initialization of class fields, etc. ngOnInit() is a better place to write “actual work code” that we need to execute as soon as the class is instantiated.

Why Angular is called SPA?

Answer: AngularJS is a full featured SPA framework, with the help of which a single page application is created. In the SPA, the whole page is not reloaded every time, only every time the view will be change. So when you load the application for the first time, not all the pages from the server will be rendered…

What is DSL in Angular?

A domain-specific language (DSL) is a computer language specialized to a particular application domain. Angular has its own Domain Specific Language (DSL) which allows us to write Angular specific html-like syntax on top of normal html.

What are lifecycle hooks in Angular?

Lifecycle hooks are a special functionality in Angular that allow us to “hook into” and run code at a specific lifecycle event of a component or directive. Angular manages components and directives for us when it creates them, updates them, or destroys them.

What is Ngmodel in Angular?

The ngmodel directive binds the value of HTML controls (input, select, textarea) to application data. With the ng-model directive you can bind the value of an input field to a variable created in Angular.

What is difference between link and compile in AngularJS?

Compile function: It is used for template DOM Manipulation and collect all of the directives. Link function: It is used for registering DOM listeners as well as instance DOM manipulation. It is executed once the template has been cloned. Compile: traverse the DOM and collect all of the directives.

What is the difference between AngularJS directives and controllers?

A controller is usually used to contain and maintain the logic for your view, which gets bound to your view via $scope. A directive is something that you might use repeatedly and is called in your view directly through the directive name which you can pass in as an attribute.

Which file runs first in Angular?

main.ts”
ts” file, i.e., “main. ts” file is the main file from where the execution of an Angular application will start.

How many times ngOnInit is called?

ngOnInit and Constructor are called twice.

Can we call ngOnInit multiple times?

ngOnInit() is called once for every method. There is no way to make it being called multiple times.