Answer & Solution
Answer: Option A
Solution:
The typeof operator returns 'number' for NaN (Not-a-Number) values.
Q
What will typeof NaN return?
Related Questions on Average
Which method can be used to convert a string to a number in JavaScript?
A). parseInt()
B). toString()
C). toNumber()
D). parseStr()
What will typeof [1, 2, 3] return?
A). array
B). object
C). number
D). list
What is the data type of 42 in JavaScript?
A). String
B). Boolean
C). Number
D). Object
What is the output of typeof null?
A). null
B). undefined
C). object
D). number
Which symbol is used to denote a string template literal?
A). ''
B).
C). ``
D). {}
What is the result of null == undefined?
A). 1
B). 0
C). Error
D). NaN
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 of the following is not a primitive data type in JavaScript?
A). String
B). Number
C). Object
D). Boolean
What is the result of typeof Symbol('id')?
A). symbol
B). object
C). string
D). undefined