Angularjs Interview Questions and Answers
A JavaScript client-side framework, AngularJS offers a structured method of building websites and applications. It is a structural framework which is used to develop the dynamic web app. We have an impressive collection of AngularJS Interview Questions that is a must-read for all developers and designers!. Its JavaScript library enforces the Model View Controller (MVC) framework. AngularJS I said to be one of the most widely used JavaScript client-side frameworks in the world.
| Quick Facts About AngularJS | |
|---|---|
| What is the latest version of Angular? | Angular 11.0 released on 11th November 2020 |
| When did angular release? | 4th May 2018 |
| When was Angular first released? | Angular 2.0 and released on 14th September 2016 |
| What language does Angular use? | TypeScript |
Our angular questions has been created by seasoned Angular experts. It shall help you to answer some of the most frequently asked questions during an job interview.
Most Frequently Asked Angularjs Interview Questions
No. You can auto-bootstrapped only one AngularJS application per HTML document. However, the first ngApp found will be used by default to define the root element to auto-bootstrap. Yet, if another ng-app directive gets placed, then it will not be processed by AngularJS. In this case, you should manually bootstrap the second app instead of using the second ng-app directive.
Each application contains one root scope and several child scopes. And, when new scopes get created, they get added as children of the parent scope. Similar to DOM, they create a hierarchical structure.
You can easily get marks in this Angularjs Interview Question by just naming the types of fits in Angular Interviews.
Links combine the directives with a scope and help in producing a view. The link function registerS DOM listeners and for updating the DOM. It gets executed once the template is cloned.
The pre-linking function gets executed before linking the child elements. Pre-linking is not safe for DOM transformation. Post linking is executed after linking the child elements. Post linking is safe for DOM transformation.
Yes, we can implement nested controllers in Angularjs.
The parent scope in Angular refers to the scope of the parent element of any page.
Now, in the above case, you can access the variables attached to the parentController using the childController through the parent scope.
In ANgular, all the applications have a $rootScope which is basically the scope created on an HTML element containing the ng-app directive.
For example, here you have an element which is nested within another element using its own controller:
<div ng-controller="parentController">
... something in the parent element
<div ng-controller="childController">
... something in the child element
</div>
</div>
In Angular, a provider is a type of an object having a $get() method. In this, the injector is used to calls the $get method for creating a new instance within a service. The provider in AngularJS allows users to create a configurable service in which an input can be used to set on each application for the service created using the provider() function.
A JavaScript client-side framework, AngularJS offers a structured method of building websites and applications.Its JavaScript library enforces the Model View Controller (MVC) framework. AngularJS i said to be one of the most widely used JavaScript client-side frameworks in the world.
AngularJS was developed by Misko Hevery and Adam Abrons. The framework is maintained by Google now.
2009
AngularJS follows MVC architecture. Here is a diagram of the MVC framework to bring some clarity.
Controllers: Basically used to represent the layer comprising of the business logic. The user events trigger functions that have been stored in the controller.
Views: These are used in the Angular architecture to depict the presentation layer provided to the end-users/consumers.
Models: In Angular, models are used to represent your data.
Development History of Angular JS
AngularJS was developed by Misko Hevery and Adam Abrons in 2009. The framework is maintained by Google now.
It is not a single piece in the overall puzzle of building the client-side of a web application. It also handles all of the AJAX and DOM code you once wrote by hand and puts it in a clear structure.
Advantages of AngularJS
- Easy to implement MVC.
- Makes HTML more intuitive and easier to maintain.
- More comfortable to access, manipulate, and implement.
- Applications use very less code compared to other JavaScript applications.
- Supports the test-driven development approach (TDD)
Though every interview is different, we can help you crack your next interview with the most commonly asked Angularjs Interview Questions, which will help you achieve success.
Installation Steps
- Open the link https://angularjs.org/
- You will see two options on this page - View on GitHub and Download.
- Click the download button, and it will start downloading angular.min.js.
- Create an HTML page and include the following AngularJS JavaScript file
http://ajax.googleapis.com/ajax/libs/angularjs/1.3.14/angular.min.js with script tag - Run the HTML page in the browser.