Q
What does NaN represent in JavaScript?

Answer & Solution

Answer: Option A
Solution:
NaN stands for 'Not a Number' and represents an invalid or unrepresentable value resulting from arithmetic operations.
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A). String

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C). Number

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A). Infinity

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Which of these is a complex or reference data type in JavaScript?

A). Number

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A). Infinity

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A). Object

B). Array

C). Function

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Which of the following is not a valid data type in JavaScript?

A). Array

B). Symbol

C). Map

D). Tuple

What is the outcome of typeof [1, 2, 3] in JavaScript?

A). String

B). Number

C). Array

D). Object

What is the outcome of typeof undefined in JavaScript?

A). String

B). Undefined

C). Null

D). Number

Which data type represents a block of reusable code in JavaScript?

A). String

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What is the data type of the value undefined in JavaScript?

A). Number

B). Boolean

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