JavaScript Interview Questions
Questions Answers Views Company eMail

What are self Executing Functions?

591

Is Javascript a Functional Programming Language?

631

Difference between the substr() and substring() in JavaScript?

511

Which keyword is used to print the text in the screen?

611

What is Browser Object Model?

514

Basic methods for opening a popup window using javascript?

486

what data type javascript supports?

519

How will you create new object in javascript?

518

How to create a confirmation box?

515

How to toggle display an html element?

531

What’s a way to append a value to an array?

520

How do you check if a variable is an object

515

When would you use var in your declaration and when you wouldn’t?

511

What is variable typing in javascript?

520

What’s relationship between javascript and ecmascript?

522


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Un-Answered Questions { JavaScript }

What is webassembly good for?

427


Name the two functions that are used to create an HTML element dynamically?

477


Which type of variable among global and local, takes precedence over other if names are same?

475


Why is javascript so popular?

465


Methods get and post in html forms - what's the difference?

481






Which keywords are used to handle exceptions?

503


Define unescape() function?

509


How do you change the style/class on any element?

505


name any two javascript functions which are used to convert nonnumeric values into numbers?

446


How to define name function in javascript?

503


What is jscript used for?

462


Is javascript open source?

425


What is external javascript?

514


What is difference == and === in javascript?

478


What are .js files?

475