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 output of '5' - 3?
A). 2
B). 2
C). 53
D). Error
What is the data type of 42 in JavaScript?
A). String
B). Boolean
C). Number
D). Object
How do you declare a variable with an undefined value?
A). let x;
B). let x = '';
C). let x = 0;
D). let x = null;
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A). undefined
B). null
C). object
D). number
What will typeof [1, 2, 3] return?
A). array
B). object
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What is the result of null === undefined?
A). 1
B). 0
C). Error
D). NaN
Which function can convert a number to a string in JavaScript?
A). toString()
B). parseInt()
C). String()
D). Number()
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 data type of an array in JavaScript?
A). Array
B). Object
C). Collection
D). List