What is the data type of an array in JavaScript?

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

A). toString()

B). parseInt()

C). String()

D). Number()

What is the data type of true in JavaScript?

A). String

B). Boolean

C). Number

D). Object

What will typeof NaN return?

A). number

B). NaN

C). undefined

D). object

What is the result of typeof Symbol('id')?

A). symbol

B). object

C). string

D). undefined

What is the result of null === undefined?

A). 1

B). 0

C). Error

D). NaN

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

A). function

B). object

C). undefined

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 typeof null?

A). null

B). undefined

C). object

D). number

What is the result of typeof undefined?

A). undefined

B). null

C). object

D). number

Which operator checks both value and type for equality in JavaScript?

A). ==

B). !=

C). ===

D). !==