Javascript Question and answers

1.

Can a function can be assigned to a variable in JavaScript?

True

False

Some time

None of the above

2.

How is strict mode in used to apply in JavaScript?

"apply strict"

"use strict"

"strict"

"strict mode"

3.

What will be the output of the below code?

Javascript quiz on class

Init developer constructor

Init developer constructor, Init employee constructor

Init employee constructor

Init employee constructor, Init developer constructor

4.

Find the output of the following JavaScript code?

for(var x = 1; x < 5; x++)
console.log(x);

5555

1234

12345

11111

5.

What does eval() means in JavaScript?

executes specified string as JavaScript code.

It will return an object representing the parsed tree of the specified JavaScript code.

It will execute server side code in JavaScript.

It will display popup message.

6.

Is JavaScript a ECMAScript?

True

false

both

none

7.

What will be the output of the below code?

test1@test.com, test2@test.com

0, 1,

email, email

8.

Which is a valid JavaScript function in following answers?

var myFunc = function myFunc{ };

function myFunc(){ };

myFunc function(){ };

function myFunc = { };

9.

Which is NOT a correct way of declaring an array in JavaScript in following answers?

ar arr = [1, "two", 3 , 4 ];

var arr = new Array();

var[] arr = new Number()[5];

None of the above

10.

What will be the output of the below code?

Javascript quiz for let keyword

0, 1, 2, 10

1, 2, 10

0, 1, 2, 2

1, 2, 3, 10

11.

What will the following statement return 1 == "1" ?

True

False

1

0

12.

Which is NOT a JavaScript object in the following?

var obj = {};

var obj = { name: "Steve"};

var obj = { name = "Steve"};

var obj = new Object();

13.

Which is an example of anonymous function in JavaScript in the following answers?

var myFunc = function(){ };

function(){ };

var myFunc = (){ };

All of the above.

14.

What is the correct output of the following JavaScript code?

var x = 0
do{ console.log(x) }while(x > 0)

0

null

1

No output

15.

How a error can be handled in JavaScript?

By using try, catch & finally block.

By using if-else block

By using eval().

By writing error proof code.

Javascript Question and answers

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