Q
How does the instanceof operator work in JavaScript?

Answer & Solution

Answer: Option A
Solution:
The instanceof operator checks if an object has a specific prototype in its prototype chain.
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What is the result of typeof NaN in JavaScript?

A). number

B). NaN

C). undefined

D). string

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A). string

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A). date

B). object

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A). object

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A). undefined

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A). function

B). object

C). undefined

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What does Number('123') return in JavaScript?

A). 123

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How does the typeof operator handle arrays in JavaScript?

A). array

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