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

JavaScript Interview Questions

Questions Answers Views Company eMail

What is the purpose of 'this' operator in JavaScript?

1200

What is escape & unescape String functions in JavaScript?

1076

Can you pass a anonymous function as an argument to another function?

1220

What is the difference between JavaScript and jscript?

1 1355

What are the advantages of using JavaScript?

1056

Which built-in method combines the text of two strings and returns a new string?

1163

What is the difference between undefined and not defined in JavaScript?

1067

How can you get the total number of arguments passed to a function?

1123

what is pop()method in JavaScript?

1051

How can you get the reference of a caller function inside a function?

1064

Is there automatic type conversion in JavaScript?

1012

How to create array in JavaScript?

1171

What is arguments object in JavaScript?

1193

Whether JavaScript has concept level scope?

1124

What is the instanceof operator in JavaScript?

1024

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Un-Answered Questions { JavaScript }

Is javascript backend or frontend?

924

Should you use var or let?

1047

What is the function of delete operator?

1020

What is the use of isNaN function?

995

Is JavaScript a true OOP language?

1109

What is the difference between the substr() and substring() functions in javascript?

1030

Which built-in method sorts the elements of an array?

1074

How to create array in JavaScript?

1171

What are the three core languages in web pages?

1086

What are .js files?

951

Write a program to reverse a string in pure javascript?

1022

Is function a data type in javascript?

1083

What is the difference between the operators '==' and '==='?

1045

If an array with name as "names" contain three elements, then how will you print the third element of this array?

1079

How do I install javascript?

977

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