AngularJS Interview Questions and Answers

HTML is incredible for the purpose of declaring static archives; however, it vacillates when we attempt to utilize it for announcing any dynamic perspectives in web-applications. AngularJS gives you a chance to broaden HTML vocabulary for your application. The subsequent condition is remarkably expressive, decipherable, and fairly quick to create.

The professionals with AngularJS are in a high demand these days. In the event that you are hoping to go to a job interview based on AngularJS then here are the most frequently asked questions along with their answers to help you in the correct way?

AngularJS Interview Questions

  • Define what AngularJS is.
  • Define a scope in AngularJS.
  • What is an AngularJS Directive?
  • What is an AngularJS Module?
  • What is the difference between ng-app and ng-controller?
  • Explain the concept of a digest cycle in AngularJS?
  • What is the way to prescribe for a scope variable to have one-time binding only?
  • Name a few popular AngularJS IDE plugins/extensions for web development?
  • What is the difference between AngularJS Expressions and JavaScript Expressions?
  • What are the Browsers that AngularJS Support?
  • What are the different types of directives in AngualrJS?
  • What are the ways in which you can use a directive?
  • Explain what a digest cycle is in AngularJS?
  • Explain e2e testing of AngularJS applications.
  • What is dependency injection?
  • Explain the role of the Angular Prefixes $ and $$?
  • Explain the concept of Data Binding?
  • Describe the Factory Method In AngularJS?
  • What do you understand by Single Page Application (SPA)?
  • When would you use an attribute as opposed to an element?

AngularJS Interview questions and answers

For a professional who is looking to attend AngularJS interview recently, here are some of the most popular AngularJS interview questions and their answers to help you in the most appropriate way. Here, with the help of our experienced team we have collated a list of the top frequently asked questions with answers to help fresher and the experienced.

AngularJS Interview questions and answers for fresher

Q1). Define what AngularJS is.

AngularJS is an open-source JavaScript structure intended for making dynamic single site page applications with lesser lines of code.

Q2). Define a scope in AngularJS.

Scope is an extraordinary JavaScript question that plays the role of the part that joins the controller (JavaScript) with the views (HTML). The controller sets properties on the degree and the view ties to them.

Q3). What is an AngularJS Directive?

A directive in AngularJS is nothing but an HTML attribute with an ng prefix.

Q4). What is an AngularJS Module?

In AngularJS module is the part that joins an application. It is created by utilizing the AngularJS function angular.module. 

Q5). What is the difference between ng-app and ng-controller?

In AngualrJSng-app directive defines the app, whereas an ng-controller directive defines the controller in AngularJS.

Q6). Explain the concept of a digest cycle in AngularJS?

In each process cycle, Angular looks at the old and the new form of the scope model values. The process cycle is activated automatically. We can likewise utilize $apply() in the event that we need to trigger the process cycle manually.

Q7). What is the way to prescribe for a scope variable to have one-time binding only?

We can do that by utilizing “::” before it. This enables you to check if the competitor knows about the accessible variable ties in AngularJS.

Q8). Name a few popular AngularJS IDE plugins/extensions for web development?

Here is a list of IDE Plugins and Extensions which can upgrade the way you code with AngularJS:

  • ATOM
  • Brackets
  • Eclipse
  • Net Beans
  • Sublime Text
  • Text mate
  • Visual Studio 2012/2013 Express
  • WebStrorm

Q9). What is the difference between AngularJS Expressions and JavaScript Expressions? 

Angularjs Expressions JavaScript Expressions
Cannot not support conditionals, loops, and exception Can Support Conditionals, Loops and Exception

Q10). What are the Browsers that AngularJS Support?

AngularJS supports the latest versions of all the following browsers- Safari, Chrome, Firefox, Opera, and Internet Explorer. Not only has this it also supported various mobile browsers such as iOS Safari, Android, Chrome Mobile, and Opera Mobile.

AngularJS Interview questions and answers for Experienced 

Q11). What are the different types of directives in AngualrJS?

There are four different types of directives, they are

  • Element directives
  • Attribute Directives
  • CSS Class Directives
  • Comment Directives

Q12). What are the ways in which you can use a directive? 

You can utilize a directive as an attribute, element or class name. To characterize the way your directive will be utilized, you have to set the limit alternative in the directive declaration.

Q13). Explain what a digest cycle is in AngularJS?

Amid each digest cycle, all of the new scope model values are looked at against the past values. This is called dirty checking. In the event that change is distinguished, watches set on the new model are terminated and another digest cycle gets implemented.

Q14). Explain e2e testing of AngularJS applications.

End-to-end (e2e) testing includes testing an application all the way to decide if every one of the segments is working legitimately. It gets issues inside an application identified with coordination and stream. 

Q15). What is dependency injection?

Dependency injection is where the needy articles are infused as opposed to being created by the client. 

Q16). Explain the role of the Angular Prefixes $ and $$?

To avert coincidental name crashes inside the code, AngularJS prefixes the names of public objects with $ and the names of private objects with $$.

Q17). Explain the concept of Data Binding?

Data binding is the connection bridge amongst view and business logic of the application. Data Binding in AngularJs is the programmed synchronization between the model and view. At the point when the model changes, the view is naturally refreshed and the other way around. AngularJs supports one-route binding and also two-way binding.

Q18). Describe the Factory Method In AngularJS?

A factory is a very simple function in AngularJS which enables you to include some logic before making the object and in the end, it also restores the created object.

Q19). What do you understand by Single Page Application (SPA)? 

SPA is the idea whereby pages are stacked from the server not by doing postbacks, rather by making a solitary shell page or master page and stacking the site pages into the master page.

Q20). When would you use an attribute as opposed to an element?

You utilize an element when you are making a segment that is responsible for the layout. You utilize an attribute when you are brightening a current component with new functionality.