In today’s competitive job market, mastering AngularJS is crucial for freshers aspiring to build a career in front-end development. Many recruiters focus on fundamental concepts during technical rounds, making it essential to prepare for Angular JavaScript interview questions in advance.
If you’re a beginner looking to ace your AngularJS interview, here are the must-know concepts that will boost your confidence and technical expertise.
AngularJS follows the Model-View-Controller (MVC) architecture, which helps in structuring applications efficiently.
Model: Manages data and business logic
View: Displays data to the user
Controller: Connects the Model and View, controlling interactions
Interview Tip: Be ready to explain how AngularJS implements MVC and how it differs from traditional JavaScript frameworks.
One of the most powerful features of AngularJS is two-way data binding, which keeps the model and the view in sync automatically.
Example:
<input type="text" ng-model="name">
<p>Hello, {{ name }}</p>
Here, any change in the input field will immediately update the paragraph content.
Interview Tip: Expect questions on how AngularJS achieves data binding and its advantages over one-way binding.
Directives enhance HTML functionality by adding custom behavior. Some commonly used directives are:
ng-model → Binds data to input fields
ng-repeat → Iterates over arrays
ng-if / ng-show / ng-hide → Controls element visibility
ng-click → Handles user interactions
Interview Tip: Prepare to write examples using these directives and explain their real-world applications.
AngularJS has a built-in Dependency Injection (DI) system that makes code modular and testable. It allows developers to inject services, factories, and values where needed.
Example:
app.controller('myCtrl', function($scope, $http) {
$http.get('data.json').then(function(response) {
$scope.data = response.data;
});
});
Interview Tip: Be ready to explain DI and its benefits in terms of modularity and testability.
Services and factories are used to share data and business logic across multiple controllers in AngularJS.
Service: A singleton object that holds reusable logic
Factory: A function that returns an object
Interview Tip: You might be asked to create a service and use it inside a controller.
AngularJS enables the creation of Single Page Applications (SPA) using the ngRoute module.
Example of Routing:
var app = angular.module('myApp', ['ngRoute']);
app.config(function($routeProvider) {
$routeProvider
.when('/home', { templateUrl: 'home.html', controller: 'HomeCtrl' })
.when('/about', { templateUrl: 'about.html', controller: 'AboutCtrl' })
.otherwise({ redirectTo: '/home' });
});
Interview Tip: Expect Angular JavaScript interview questions about how routing works and how SPAs improve performance.
The $http service is used to communicate with back-end APIs.
Example:
$http.get('https://api.example.com/users')
.then(function(response) {
$scope.users = response.data;
});
Interview Tip: Be prepared to explain how to send GET and POST requests in AngularJS.
Filters help format data dynamically in the view. Common filters include:
uppercase / lowercase
currency
date
filter (for search functionality)
Example:
<p>{{ price | currency }}</p>
Interview Tip: Expect questions on how filters can be used within expressions and directives.
Mastering these essential AngularJS concepts will help you tackle Angular JavaScript interview questions with confidence. By understanding MVC, data binding, directives, dependency injection, and routing, you’ll be well-prepared to impress recruiters.