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

JavaScript Interview Questions

Questions Answers Views Company eMail

How to get an element by class in javascript ?

1177

Is javascript multi-threaded or single-threaded?

991

Explain javascript debounce function?

1094

What is javascript? List some data types supported by javascript?

1069

List few difference between java and javascript?

1070

How to clone an object in javascript?

1060

Explain spread operator in javascript?

1002

Explain equality operators in javascript?

1015

Explain mul function in javascript?

1021

List few difference between primitive and non primitive javascript data types?

1058

Explain promise in javascript?

912

What is the use of let & const in javascript?

992

What is use of settimeout function in javascript?

1185

What are the different types of errors available in javascript?

1037

How to calculate fibonacci numbers in javascript?

1076

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Un-Answered Questions { JavaScript }

What are the types of data types?

1070

What is bom?

954

What are the advantages of using JavaScript?

1056

What is difference between undefined variable and undeclared variable?

987

How javascript variables work?

1071

Is javascript safe to download?

905

Write the code for adding new elements dynamically?

1158

Which built-in method removes the last element from an array and returns that element?

967

How can a value be appended to an array?

987

Difference between private, public and static variable?

1158

What are the main uses of javascript?

1074

How to convert a string to lowercase?

1242

List out the different ways an HTML element can be accessed in a Javascript code?

1253

What is primitive data types in javascript?

1038

What is a javascript symbol?

981

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