JavaScript Interview Questions, Answers for Freshers and Experienced asked in various Company Job Interviews

JavaScript Interview Questions

Questions Answers Views Company eMail

How do you extend classes Code snippet: const circle = { radius: 20, diameter() { return this.radius * 2; }, perimeter: () => 2 * Math.PI * this.radius };

1 1423

Can you write a random integers function to print integers with in a range?

1 1584

What is the output of below code var car = new Vehicle("Honda", "white", "2010", "UK"); console.log(car); function Vehicle(model, color, year, country) { this.model = model; this.color = color; this.year = year; this.country = country; }

1 1977

Event handler Example

1 1304

What will be the output of the code below? var Y = 1; if (function F(){}) { y += Typeof F; } console.log(y);

1 1668

What will be the output of the following code? //nfe (named function expression) var Foo = Function Bar() { return 7; }; typeof Bar();

1 1604

What is a “closure” in JavaScript? Provide an example

1 1459

What is the difference between let, const, and var?

1 1298

Explain the difference between == and === in JavaScript.

1 1375

What is the difference between synchronous and asynchronous JavaScrip

1 1471

What is the event loop in JavaScript?

1 1450

What is a Promise in JavaScript?

1 1456

What is this in JavaScript?

1 1401

What is call(), apply(), and bind()?

1 1321

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Un-Answered Questions { JavaScript }

hello sir my name is naga sekhar i completed my b-tech in 2011 with 61% in IT streme.I completed my core and advanced java coure before 8months back.Still i did not get the job.i tried so many times.and i went to some interviews but no use.now i want to get the job in software sector

2389

How to clone an object in javascript?

1059

What is emotional closure?

941

What is new function in javascript?

1076

Where should I put script tags?

921

What do you use javascript for?

911

Do hackers use javascript?

954

What is the best site to learn javascript?

935

why we need java instead of c

1740

How do I view javascript in chrome?

910

Why is javascript so popular?

1009

What is a reverse string?

1099

How to disable an html object ?

1207

How to capture the Image width and height using QTP script ? Kindly answer plz.... Thanx in adavance...

4056

What is the use of blur function?

1018

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