AngularJS Interview Questions And Answers

AngularJS is an open-source JavaScript framework, maintained by Google, that assists with running single-page applications. Its goal is to augment browser-based applications with model–view–controller capability, in an effort to make both development and testing easier

Very testable and designed this way from ground up. It has an integrated dependency injection framework, provides mocks for many heavy dependencies (server-side communication).

Yes, Angular can use jQuery if it's present in your app when the application is being bootstrapped. If jQuery is not present in your script path, Angular falls back to its own implementation of the subset of jQuery that we call jQLite.

Yes, you can use widgets from the Closure Library in Angular.

The startup time heavily depends on your network connection, state of the cache, browser used and available hardware, but typically we measure bootstrap time in tens or hundreds of milliseconds.

The runtime performance will vary depending on the number and complexity of bindings on the page as well as the speed of your backend (for apps that fetch data from the backend). Just for an illustration we typically build snappy apps with hundreds or thousands of active bindings.

We run our extensive test suite against the following browsers: Safari, Chrome, Firefox, Opera, IE8, IE9 and mobile browsers (Android, Chrome Mobile, iOS Safari). See Internet Explorer Compatibility for more details in supporting legacy IE browsers.

To initialize the Angular Application.

To initialize the Angular Application data.

javaScript

2009

October 31, 2014

1.3.1

Yes, It is free to use.

► Scope
► Controller
► Model
► View
► Services
► Data Binding
► Directives
► Filters
► Testable

Controller is constructor function in Angular Controller.
When a Controller is attached to the DOM with use the ng-controller, Angular will instantiate a new Controller object using constructor function.

Directives are used to add new attributes of HTML.

Different types of directives are:
► Element directives
► Attribute directives
► CSS class directives
► Comment directives

An injector is a service locator, used to retrieve object instances.

Factory method are used to create the directive. It is invoked only once, when compiler matches the directive for the first time.

To bind the html tags (input, select, textarea) to Angular Application Data.

It is synchronization of data between the model(Angular Application variable) and view components (display with {{}}).

1 <div ng-app="" ng-init="quantity=10;cost=5">
2 <b>Total Cost: {{ quantity * cost }}</b>
3 </div>

Yes, Angular can use jQuery if you have included the jQuery library.
IF Not, Angular falls back to its own implementation of the subset of jQuery that we call jQLite.

1 <div ng-app="" ng-init="quantity=10;cost=5" class="ng-scope">
2 <b class="ng-binding">Total Cost: 50</b>
3 </div>

It is used to display the data in loop same as foreach in PHP.