Q
What is the result of typeof NaN in JavaScript?

Answer & Solution

Answer: Option A
Solution:
typeof NaN returns 'number'.
Related Questions on Average

How does the typeof operator handle arrays in JavaScript?

A). array

B). object

C). undefined

D). null

How does the instanceof operator work in JavaScript?

A). Checks if an object has a specific prototype in its prototype chain.

B). Checks if two variables are of the same type.

C). Checks if a variable is null.

D). Checks if a variable is undefined.

How does the instanceof operator behave with primitive values in JavaScript?

A). Throws an error

B). Returns true for all primitive values

C). Returns false for all primitive values

D). Primitive values cannot be used with instanceof

What will be the output of [] instanceof Array in JavaScript?

A). 1

B). 0

C). null

D). undefined

What is the result of typeof undefined in JavaScript?

A). undefined

B). string

C). null

D). object

What does Number('123') return in JavaScript?

A). 123

B). '123'

C). NaN

D). 1

What does typeof Math evaluate to in JavaScript?

A). math

B). object

C). number

D). undefined

How does JavaScript evaluate typeof /^regex$/ in JavaScript?

A). regexp

B). object

C). string

D). null

What does the typeof operator return for an undefined variable?

A). undefined

B). number

C). boolean

D). string

What will be the output of typeof null in JavaScript?

A). object

B). null

C). undefined

D). string