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
What is the result of null == undefined?
A). 1
B). 0
C). Error
D). NaN
Which operator checks both value and type for equality in JavaScript?
A). ==
B). !=
C). ===
D). !==
What is the result of typeof undefined?
A). undefined
B). null
C). object
D). number
What is the output of '5' + 3?
A). 8
B). 53
C). 8
D). Error
What will typeof [1, 2, 3] return?
A). array
B). object
C). number
D). list
What is the result of null === undefined?
A). 1
B). 0
C). Error
D). NaN
What is the data type of 42 in JavaScript?
A). String
B). Boolean
C). Number
D). Object
What is the output of typeof function() {}?
A). function
B). object
C). undefined
D). number
Which symbol is used to denote a string template literal?
A). ''
B).
C). ``
D). {}
How do you declare a variable with an undefined value?
A). let x;
B). let x = '';
C). let x = 0;
D). let x = null;