How to Answer JavaScript Interview Questions?
How to Answer JavaScript Interview Questions?

JavaScript interview questions help to determine the candidate’s JavaScript knowledge. The interview questions can be based on a variety of real-world problems. The main goal is to create a positive experience for both the interviewer and the candidate. These interview questions should be well-planned and should focus on the candidate’s JavaScript knowledge.

Object-oriented programming language

Object-oriented programming (OOP) is a programming paradigm that allows developers to organize code in a structured manner. It offers numerous advantages for developers, including easy code handling and maintenance. Its modular structure enables developers to organize a variety of complex scenarios into smaller, manageable chunks.

In this type of programming, classes and variables have multiple definitions, allowing them to share common properties. In addition, classes and objects can inherit properties and methods from other classes, which allows them to use code reuse. Some interview questions will focus on how classes and methods can inherit from one another, such as method overloading.

Object-oriented programming languages are organized by classes, which are composed of subclasses. The base class defines the types of objects and their properties and methods, while the subclasses inherit from the parent class.


Non-blocking JavaScript is a popular programming technique that can increase the performance of a web application. Employers often expect applicants to have knowledge of asynchronous JavaScript, and understanding the basics of this language can greatly increase your chances of securing a job. This article explores common JavaScript interview questions and offers some tips for answering them successfully.

Session storage

A session storage is a persistent set of data that is accessible for a particular session in a browser. It is similar to local storage, but its data is not rewritten between browser sessions. Instead, it gets cleared once the current page session ends or the user closes the browser. It can be used to store data about a specific user.

JavaScript interview questions may also require you to apply advanced knowledge of the language. For instance, you might need to know how to use forEach loops to write a series of instructions. This technique entails converting variables between different types. There are two types of loops: forEach and map.

You’ll also have to be familiar with APIs, which are classes that provide additional functions for JavaScript. In addition, you may want to familiarize yourself with JavaScript session storage. For example, if you’re creating a web page with multiple tabs, you’ll have one sessionStorage for each tab with the same URL.


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