React is a JavaScript library for building user interfaces specifically for single page applications and handling view layer for web and mobile apps. JQuery is a feature-rich JavaScript library that makes HTML document traversal and manipulation, event handling, animation, and Ajax simpler with an easy to use API. Main language: JavaScriptĪngular (or Angular 2+) is a complete rework of the whole Angular framework. For example, Angular (and AngularJS), JQuery, React, Vue.jsĪngularJS is a client-side JavaScript framework based on MVC architecture it simplifies web development by offering automatic view/model synchronization. For example, myvar is not the same as myVar What JS frameworks can you name? Define each.Īnswer: There are numerous JS frameworks and libraries available. What’s the relationship between JavaScript and ECMAScript?Īnswer: ECMAScript is a scripting-language specification that was created to standardize JavaScript.

Server-side JavaScript extends the core language by supplying objects relevant to running JS on the server side.

JavaScript Theory Basics What is JavaScript? What common features of JS can you name?Īnswer: JavaScript is an object-oriented programming language as well as client- and server-side scripting language that can be inserted into web pages to make them interactive.Ĭommon JS features include a standard library of objects (Array, Date, Math) and a core set of language elements (operators, control structures, statements).Ĭlient-side JavaScript extends the core language by supplying objects to control a browser and its Document Object Model (DOM). In this article, we’ve brushed over some theoretical questions covering the fundamentals of JavaScript, as well as gathered some sample practice coding interview questions. If you’re looking for JavaScript interview questions, chances are you’re either a tech recruiter or a prospective candidate looking for a job in JavaScript development. 28 Sample Interview Questions for JavaScript Developers | Theory and Practice

Javascript interview questions