Answer & Solution
Answer: Option A
Solution:
typeof NaN returns 'number'.
Q
What is the result of typeof NaN in JavaScript?
Related Questions on Average
What does Number('123') return in JavaScript?
A). 123
B). '123'
C). NaN
D). 1
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 JavaScript evaluate typeof 'Hello'?
A). string
B). object
C). undefined
D). null
What does typeof true evaluate to in JavaScript?
A). boolean
B). number
C). string
D). undefined
What is the result of Boolean('false') in JavaScript?
A). 1
B). 0
C). NaN
D). null
What will be the output of typeof {} in JavaScript?
A). object
B). array
C). null
D). undefined
What is the output of typeof Symbol('id') in JavaScript?
A). symbol
B). object
C). string
D). null
How does JavaScript evaluate typeof /^regex$/ in JavaScript?
A). regexp
B). object
C). string
D). null
How does JavaScript evaluate Boolean(0)?
A). 1
B). 0
C). null
D). undefined
What does the typeof operator return for an undefined variable?
A). undefined
B). number
C). boolean
D). string