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
Controllers are essentially Javascript functions that provide data and logic to the HTML user interface. As the name suggests, controllers are designed to control how data will flow from the server to the HTML user interface.
Internationalization allows you to show locale-specific information on a site. AngularJS is supporting inbuilt internationalization only for three types of filters: date, currency, and numbers. In order to implement internalization, you only need to incorporate the corresponding js as per the locale of the country. It will handle the locale of the browser by default.
Every application contains a single root scope, and the rest of the scopes are descendant scopes of the root scope. The function of scopes is to provide separation between the view and the model, via a mechanism for observing the model for changes. Scopes also provide event emission, event broadcast, and subscription facilities.
Note: This angular interview questions and answers for experienced peoples
The compiler matches attributes and text using interpolate service to check if they contain any embedded expressions. As part of the normal cycle, these expressions will get updated and registered as watches.
The ng-template allows us to create an HTML page using the script tag. This template contains "id" attribute that can be used by the $routeProvider to map view model with a controller.
This directive has unique variables that are useful for iterating the collection. Some of these variables include, $index, $first, $middle, and $last.
A module is a container for the different parts of the application like services, controller, filters, directives, etc. Module treats as a main() function. It is created using an object's module() method.
var app = angular.module('MApp', []);
It is the code snippets that resolves to a value. AngularJS expressions are placed inside {{expression}}.
For Example:{{1+1}}
It supports one-time binding expressions.
The ngClock directive is used in Angular to prevent the HTML template display from flickering while the data loads. Adding the ng-cloak at the angular js root element(ag-app) will display the view on-screen, but, only after Angular compiles the DOM elements first. To ensure flickering does not continue, follow these steps:
- Add the ng-clock directive to your page root element. One of the perfect positions might be <body> tag of page or the root <div> element.
- Now, apply this code to the style sheet (CSS) to apply the style of the ng-clock class.
<style>
[ng:cloak],
[ng-cloak],
[data-ng-cloak],
[x-ng-cloak],
.ng-cloak,
.x-ng-cloak {
display: none !important;
}
</style>
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.