What is the output of typeof function() {}?

What is the data type of 42 in JavaScript?

A). String

B). Boolean

C). Number

D). Object

Which method can be used to convert a string to a number in JavaScript?

A). parseInt()

B). toString()

C). toNumber()

D). parseStr()

What is the output of '5' + 3?

A). 8

B). 53

C). 8

D). Error

Which of the following is not a primitive data type in JavaScript?

A). String

B). Number

C). Object

D). Boolean

What is the data type of an array in JavaScript?

A). Array

B). Object

C). Collection

D). List

How do you declare a variable with an undefined value?

A). let x;

B). let x = '';

C). let x = 0;

D). let x = null;

What is the output of typeof null?

A). null

B). undefined

C). object

D). number

Which of the following is a falsy value in JavaScript?

A). 0

B).

C). null

D). All of the above

What is the output of '5' - 3?

A). 2

B). 2

C). 53

D). Error

What will typeof [1, 2, 3] return?

A). array

B). object

C). number

D). list