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JavaScript Interview Questions

Home JavaScript Interview Questions

1. What is the use of Math Object in JavaScript?

The math object provides you properties and methods for mathematical constants and functions.

2. In JavaScript, Window.prompt() method return true or false value ?

0

3. Math. round(-20.51)=?

-21

4. QualityPointTechnologies

QualityPointTechnologies

5. the server-side JavaScript object?

File

6. _________ keyword is used to declare variables in javascript.

Var

7. Which of the following method is used to evaluate the regular expression?

eval(2*(3+5))

8. In Javascript, What does isNaN function do ?

Return true if the argument is not a number.

9. If x=103 & y=9 then x%=y , what is the value of x after executing x%=y?

4

10. if Choose the external object?

Checkbox[/trx_accordion_item ]

11. Which best describes void?

An operator

12. Which JavaScript feature uses JAR files?

Object signing

13. How to assign a function to a variable with the JavaScript Function contructor ?

var f= new Function(“x”, “y”, “return x + y”);

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