Q
What is the data type of 42 in JavaScript?

Answer & Solution

Answer: Option C
Solution:
The value 42 is a numeric value, so its data type is Number.
Related Questions on Average

Which of the following is a falsy value in JavaScript?

A). 0

B).

C). null

D). All of the above

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 result of typeof undefined?

A). undefined

B). null

C). object

D). number

What is the output of '5' - 3?

A). 2

B). 2

C). 53

D). Error

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

A). function

B). object

C). undefined

D). number

Which function can convert a number to a string in JavaScript?

A). toString()

B). parseInt()

C). String()

D). Number()

What is the output of typeof null?

A). null

B). undefined

C). object

D). number

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

A). String

B). Number

C). Object

D). Boolean

What is the output of '5' + 3?

A). 8

B). 53

C). 8

D). Error

How do you declare a variable with an undefined value?

A). let x;

B). let x = '';

C). let x = 0;

D). let x = null;