angularjs interview questions: 30 AngularJS Interview Questions and Answers


Answer ( 1 )


    AngularJS is a JavaScript framework for building web apps. It lets you use HTML as your template language and lets you extend HTML’s syntax to express your application’s components clearly and succinctly. AngularJS’s data binding and dependency injection eliminate much of the code you would otherwise have to write. Its extensibility model, powered by modules, makes it easy to integrate with other libraries, platforms and frameworks.

    AngularJS Interview Questions

    AngularJS is a JavaScript framework that helps you to create single page applications. It makes it easy to build well-structured, testable and maintainable front-end web applications.

    AngularJS is not just a library but also a complete framework for building large scale web applications in an efficient manner by using HTML, CSS and JavaScript.

    If your answer to the above question is yes then you are on right track because AngularJS offers many benefits such as:

    A brief introduction to Angular.js

    AngularJS is a structural framework for dynamic web apps. AngularJS allows you to use HTML as your template language and lets you extend HTML’s syntax to express your application’s components clearly and succinctly. AngularJS also provides data-binding, dependency injection and testing utilities that help with creating single page applications.

    What are the advantages of using Angular JS?

    AngularJS is a JavaScript framework for client-side development. It is a front end framework, built on top of HTML and CSS. It provides structural directives to the web pages that you create. It also helps in creating single page applications (SPAs).

    AngularJS is an open source framework, with its first release in 2009 by Google. Since then it has gained popularity among developers due to its simplicity and ease of use. AngularJS allows you to build complex web applications using simpler codes than before as compared to other frameworks like jQuery or React JS

    What is the Scope of Angular JS?

    AngularJS is a JavaScript framework, which means it’s a library that you can include in your web application. AngularJS makes it easy to create single-page applications (SPAs) and dynamic web apps with HTML, CSS and JavaScript.

    AngularJS supports two-way data binding between the view (HTML) and model (JavaScript), automatic AJAX requests, dependency injection, testability via mocks/stubs/spies/fakes etc., lazy loading of modules through routing configurations etc.

    Explain the various ways in which we can include an Angular JS library in our project.

    The AngularJS library is available on Github, so you can download and include it in your project using a script tag.

    You can also use an AMD loader like RequireJs or Browserify to load the AngularJS library. In this case, you have to specify which version of Angular you want to use by adding an entry in your package.json file:


    { “name”: “app”, “version”: “0.0.0”, “dependencies”: { “@angular/common”: “~1.5” } }

    Then run npm install to install all dependencies specified in this file (including @angular/common). After that, add another script tag for loading RequireJS: “`html You can now start using require() calls inside .html files or even .ts/.js files!

    Why should we use directives instead of traditional approaches such as jQuery plugins and CSS classes for DOM manipulation?

    Directives are a powerful tool for manipulating the DOM. They’re reusable and encapsulated, making them an ideal solution for creating custom HTML tags. Directives can also be used to create reusable components and filters, which can be applied to any element in your application.

    Directives offer many advantages over jQuery plugins or CSS classes:

    • They’re reusable – You can use directives in multiple parts of your app without having to rewrite them each time (e.g., if you have several lists with active items).
    • They’re encapsulated – Directives keep their internal logic separate from other parts of an application so that they’re easier to understand, maintain and test independently from other code files (e.g., controllers).

    What is dependency injection in Angular JS?

    Dependency injection is a way of providing dependencies to a class. It’s used to create objects without using the new keyword.

    Dependency injection can be achieved in AngularJS by using dependency injector and providers.

    How does the digest cycle work in Angular JS?

    The digest cycle is a mechanism that AngularJS uses to update the DOM with data changes. It’s triggered by an event, and then it runs through a series of steps until everything has been updated.

    The following events trigger the digest cycle:

    • Change detection (e.g., when you call $scope.$apply())
    • Synchronous AJAX requests (e.g., $http)

    In addition to these explicit events, there are also some internal ones that fire as well: * When one-way bindings change their value (e.g., )

    Explain how change detection works in Angular JS. (2)

    Change detection is the process of detecting changes in the application and updating the DOM accordingly. It’s done by comparing the current view with the previous view, if there are any changes, then it will update DOM.

    There are two types of change detection:

    • Change Detection Strategy (new)
    • dirty checking

    You will now be able to answer these questions with ease thanks to this post!

    Now that you’ve read this post, you will be able to answer these questions with ease. You’ll be able to understand AngularJS and its features better. This will help you answer the questions correctly and also give you an edge over other candidates who haven’t read this post yet.

    I hope these questions and answers will help you in your next AngularJS interview. If you have any questions, please let me know in the comments below!

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