Commonly asked Angular Interview Question and Answer

Software Development | Design, Digital, Technology | Oct 28,2021 | By Shashvathi G

As a framework for constructing front-end web applications, Angular has gained in popularity. During your interview, this collection of Angular interview questions will surely come in helpful.

1. What are the benefits of AngularJS and why are we utilizing it?

ANS: As we all know, AngularJS uses the MVW* pattern to help us create well-structured, tested, and maintainable front-end apps.

2. What is Dependency Injection (DI) and how does an object or method obtain its dependencies?

ANS: Dependency Injection, or DI, is a software design paradigm that addresses how code obtains its dependencies. The operation "config" employs dependency injection to get aspects of the application that must be configured when the module is loaded. These are the methods that an object uses to keep track of its dependents. Dependency is often generated using the new operator. Dependency can be sought for by referring to a global variable. Dependency can be supplied to any place where it's needed.

3. Explain the notion of a hierarchy of scope.

ANS: There is only one root scope in any angular application, however, there may be several child scopes. An application can have several scopes since child controllers and some directives produce new child scopes. When new scopes are constructed or generated, they are added to the parent scope as children. They also construct a hierarchical structure in the same way as DOM does.

4. Angular JS was designed by who?

ANS: Adam Abrons and Misko Hevery are the creators of AngularJS. Google is currently working on it.

5. In AngularJS, what is ng-non-bindable?

ANS: Ng-non-bindable tells AngularJs that the HTML element and its descendant nodes should not be compiled.

6. How can you use Angular JS to perform an ajax call?

ANS: The $https: control in AngularJS allows you to initiate an ajax request to read data from a server. In order to obtain the relevant records, the server initiates a database request.

7. Describe how to utilize $routeProvider.

ANS: The URL setting is set by $routeProvider in AngularJS. It associates with the relevant ng-template or HTML page and adds a controller to it.

8. In AngularJS, how do you set, receive, and delete cookies?

ANS: You can make use of To set cookies, use the $cookies.put() function. $cookies. To obtain the cookies, use the get() function. To erase cookies in AngularJS, use $cookies.remove.

9. Identify the AngularJS components that may be used as dependency injections.

ANS:1) value, 2) factory, 3) service, 4) provider, and 5) constant are AngularJS components that may be injected as dependencies.

10. What are some of the most often used Angular Global API functions?

ANS: The following are some of the most regularly utilized Angular Global API functions: Only if the supplied reference is of type string will Angular.isString returns true. Angular.lowercase: This function lowercases any string. Any string may be converted to uppercase with Angular. uppercase. Angular.isNumber: If the reference is a numeric value or number, it returns true.

11. What is BOM(Browser Object Model)?

ANS: BOM (Browser Object Model) is an acronym for Browser Object Model. The BOM (Browser Object Model) includes features such as history, object navigator, and screen location. It describes global browser objects such as the console, local storage, and window.

12.In AngularJS, what is "$rootScope"? "$rootScope" is a scope defined on the DOM (Document Object Model) element.

ANS: Only one $rootScope per application can share, among other components. The ng-app directive is present. Other scopes are referred to be its children. It has the ability to monitor expressions as well as disseminate events.

13. Identify the various stages of the AngularJS Scope lifecycle.

ANS: The following are the stages of the AngularJS Scope lifecycle: Creation Mutation in the model Registration for observers is required. Observation of mutations Destroy the scope

14. In AngularJS, what is a single-page application?

ANS: A single-page application (SPA) is a website or web application that dynamically interacts with users. JavaScript, HTML, and CSS all fit on a single page with AngularJS. It navigates without having to reload the entire HTML page.

15. Explain what webpack is and how it works.

ANS: Webpack is an Angular2 or above module bundler. It compresses, bundles, and transpiles AngularJS applications.

16. What exactly do you mean when you say NPM?

ANS: Node Package Manager (NPM) stands for Node Package Manager. It's a command-line tool client for dealing with the Node.js project's repository.

17. How do you use the Command Line Interface to start a new angularJS project?

ANS: To start a new Angular project, execute the ng new project-name command after installing the Angular command-line interface.

18. What are function expressions that are instantly invoked?

ANS: Immediately Invoked Function Expressions, or IIFEs, are functions that run as soon as they are constructed. It provides a straightforward method for isolating the variable declaration. IIFEs have two primary functions: 1) operator() 2) expression()

19. In AngularJS, what is the digest cycle?

ANS: In AngularJS, the digest cycle compares the old and new versions of the scope model, which is a crucial aspect of data binding. Using the $apply() method, the digest cycle may be started automatically or manually.

20. What are the prerequisites for working with AngularJS?

ANS: To study or work with AngularJS, you must first download the most recent version from You may utilise Google CDN (Content Delivery Network) to reference the JS file if you don't want to host it locally.

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