Q
What will be the output of [] instanceof Array in JavaScript?

Answer & Solution

Answer: Option A
Solution:
[] instanceof Array returns true.
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How does the instanceof operator work in JavaScript?

A). Checks if an object has a specific prototype in its prototype chain.

B). Checks if two variables are of the same type.

C). Checks if a variable is null.

D). Checks if a variable is undefined.

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A). string

B). object

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A). 1

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What will be the output of typeof {} in JavaScript?

A). object

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What will be the output of typeof null in JavaScript?

A). object

B). null

C). undefined

D). string

What is the result of Boolean('false') in JavaScript?

A). 1

B). 0

C). NaN

D). null

What does typeof new Date() evaluate to in JavaScript?

A). date

B). object

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What does the typeof operator return for an undefined variable?

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What does typeof window.evaluate evaluate to in JavaScript?

A). function

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