Updates on JavaScript Interview Questions for 2020

Listed below are some of the most frequently asked JavaScript Interview Questions that are published by the Coding tag to reduce the burden of the job seekers? You can simply get through these questions and these will probably help you to reduce your burden in finding the best interview questions.

Also, I have tried to use very simple and basic language so that you can easily understand the answers.

Without wasting any more time, let’s have a look through these questions.

1-     What is JavaScript?

JavaScript is a scripting language that can be embedded into HTML pages. Moreover, JavaScript is also considered as an object-based programming language.

2-     Name the different JavaScript data types?

The different types of JavaScript data types are:

• Boolean
• Number
• String
• Object
• Undefined

3-     Name the company that introduced JavaScript?

The company that proposed JavaScript is Netscape which is a software company.

4-     How can we read and write a file in JavaScript?

• We can read and write a file in JavaScript by following two methods, they are
• We can use JavaScript extension
• A web page and Active X objects can also be used

Also, read an extensive list of JavaScript Interview Questions for more such answers.

5-     What do you understand by an undefined value in JavaScript?

An undefined value in JavaScript means

• The variables that are used in the code that doesn’t exist
• Variable is not associated with any value
• The Property doesn't exist

Conclusion

Well, I am wrapping up with this. You can read these questions that will surely help you to crack your interview. Get top 30 JavaScript interview questions for more read

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