Angular Basic Interview Questions and Answers

Angular is a TypeScript-based open-source web application framework Developed and Designed by Google. Angular is the majority used for One Page application and Material Design Concepts for Nowadays. It allows us to manipulate the HTML document and bind data with DOM seamlessly.

Angular is an Integral Part of the web at the age of today. It is widely used by may tech-giants and MNCs. Even We can say It is a need of time to have a skill like angular in your stack. Without angular, your stack is not completed.

We are providing a number of Best Angular Questions along with answers for the Freshers level. They are also useful for Developers having experienced more than 2 years. The facts are based on angular 2 interview questions and also relevant to the latest versions of angular.

Angular interview questions are key to success in a technical Interview you are going for. It is a summary of concepts and a test of Angular Questions also.

What is Angular JS?

Angular JS is a TypeScript framework used for developing single-page applications. It is maintained by Google.

What are the advantages of using Angular JS?

  1. Modular Structure based on MVC.
  2. Real-time one-way and two-way data binding and DOM manipulation.
  3. Reusable components
  4. Inbuilt form validation rules

What are the main features of Angular JS?

  1. Seamless rendering
  2. MVC Structure
  3. SuperScript of JavaScript
  4. Suitable for One-page application
  5. Supports Cache
  6. Service Worker Support
  7. Tree Shaking

What is Template?

Templates are the view part of MVC and HTML documents containing directives, elements, and attributes. A template is used to display results on browsers.

What is a controller?

A controller is an Object, defined by object constructor as per Angular 2.

What are the directives in Angular JS?

Directives are the HTML attributes for angular. Attributes prefixed by “ng-” and used to extend the scope of dom.

What is the difference between jQuery and Angular JS?

jQuery is a javascript library and based on functional programming features.jQuery used to handle events, animation, dom, etc. Whereas Angular is rich in UI and seamless in dynamic templating having EASY DOM manipulation.

What are the modules in Angular JS?

A module in AngularJS is a packet having different necessary items in it like controller, filters, directives, services.

What is Data Binding?

Data binding is the key feature of Angular and many such frameworks. Data binding refers to the synchronization of information. The value stored in variables reflects at the places where are used within no time and without change of frame. There are two types of data binding-

  1. One way data binding
  2. Two-way data binding

What are one-way bindings?

One way data binding is the synchronization from Modal to View. When there is a change in Model it reflects in View and in forms. But unable to change the value in a model when changes happen in view after user input.

What are two-way bindings?

Two-way binding is the bi-direction syncing of data. This reflects the data either side when changes occur. Changes in model lead to reflection in View and Changes in view reflects in Modal.

What is the component?

Components are the basic building blocks in applications. They are completed with MVC sub-components. They handle data, render views and accept user inputs.

What is the provider?

As per
A provider is an object with a $get() method. The injector calls the $get method to create a new instance of a service. The Provider can have additional methods that would allow for configuration of the provider.$provide is used to create new providers.

What is the link?

Angular JS has a directive link on which link function is based. We can define a directive’s API using these functions.

What is the factory method?

A factory is a function that returns an object. They are reusable singleton objects and can be used as injections. We can create using factory.

What do you mean by ng-app,ng-init,ng-model?

ng-app: this is the fundamental directive to create an Angular JS Application.
ng-init: initialize the application and data
ng-model: define the model to be used in an application.

Can we use the jQuery library in Angular JS?

Yes, we can use jQuery and many other libraries along with Angular JS.

What do you understand by deep linking?

Deep linking is the redirection to the specific page without going through any other pages. This is a normal term and implemented by Angular JS by default.

What is the service?

Services are substitutable objects that can be used to organize and share code across the application.

What is internationalization?

As per :
Internationalization (i18n) is the process of developing products in such a way that they can be localized for languages and cultures easily. This is the translation of application interfaces according to any locale.

What is Injector in Angular JS?

The injector is a subsystem in Angular JS which provide reusable component, dependency management making them available on request.

How can we share data between controllers?

Can move data by returning a factory and by using the reference of the same object by other controllers.

What is the digest cycle?

Digest Cycle allows us to write custom and complex directives for data binding processes.

What is a singleton pattern and where we can find it in Angular JS?

Singleton is a static variable and holds private instances of itself. It allows only a single instance to be created.

What is the interceptor?

Interceptor is used to modify the response. It only calls after the HTTP response received. It accepts the response object as an input

What is routing?

We use ngRoute to implement routing. Routing helps us to modularize our application based on logical units.

What does ‘ng-serve’ do?

The ng serve command launches the server watches your files and rebuilds the app as you make changes to those files.

what does –open or -o command do in angular?

The –open (or just -o) command automatically opens your browser to http://localhost:4200/.

How can we create a component using Angular CLI?

Using CLI we can create a component in very less time:

| ng generate component heroes |

It will be better if You could also read Jquery Interview Questions.

I hope that the above content will help you minimize the troubles in your interview. Please do write to us for your feedback. Let us know our weakness and send us more Interview Questions so that we can publish here.

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