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.
What is the difference between Java and JavaScript?
Java is an Object Oriented Programming language; however, JavaScript is a client-side scripted language which can be inserted into HTML code to be understood by the browser.What different data types are used in JavaScript?
Different data types which are included in JavaScript are:
• String
• Number
• Boolean
• Undefined
• ObjectWhat 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.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.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 canceled
• 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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