JavaScript
has been one of the most in-demand languages in the niche of website
development. If you also have various lined up interviews for JavaScript, then
we have prepared this blog for you. In this blog, the most frequently asked JavaScript
Interview Questions have been enlisted along with their appropriate
answers. Note that these questions and answers have been prepared for both
fresher as well as experienced to tackle the technical interview sessions.
1. What is the
difference between Java and JavaScript?
Java is an
Object-Oriented Programming language; however, JavaScript is a client-side the scripted language which can be inserted into HTML code to be understood by the
browser.
2. What
different data types are used in JavaScript?
Different
data types which are included in JavaScript are:
·
String
·
Number
·
Boolean
·
Undefined
·
Object
3. What is the
use of isNaN function in JS?
isNaN
function in JavaScript is used to check whether the argument which is passed is
a number or not. If the argument is not a number, the function returns true.
Else, it returns false.
4. What do you
mean by negative infinity?
Negative
Infinity in JavaScript refers to a number that is generated every time any
negative number is divided by zero, giving the output as negative infinity.
5. What is the
concept of timers in JavaScript?
In
JavaScript, timers are used to specify which code will be executed at what time
and also to repeat the code execution at a given interval of time. Various
timers function included in JavaScript are:
·
setTimeout to start a function at a given delay
·
setInterval to repeat the function execution in a
specific time delay until it has been cancelled
·
clearInterval to stop the timers function execution
You can
also visit Technical Interview
Questions of you want to learn more in terms of Website development
interviews.
Source url
: https://codingtag.webnode.com/l/frequently-asked-javascript-interview-questions-in-20202/
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