JavaScript Interview Questions

Preparing for a job interview requires studying to refresh your knowledge and skills. This collection of JavaScript interview questions is designed to cover some commonly-asked interview questions, using concise answers and simple examples.

  • What is the Event Loop in JavaScript?

    The Event Loop is a source of confusion for many developers, but it's a fundamental piece of the JavaScript engine.

    JavaScript, Browser · Aug 21, 2022

  • What is the difference between prefix and postfix operators?

    While both the prefix and postfix operators increment a value, the resulting value of the expression is very different.

    JavaScript, Math · Oct 31, 2021

  • What is CORS?

    CORS (Cross-Origin Resource Sharing) trips up many developers, but it's pretty easy to wrap your head around.

    JavaScript, Browser · May 7, 2023