Q
What is the data type of an array in JavaScript?

Answer & Solution

Answer: Option B
Solution:
Arrays are objects in JavaScript.
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What is the data type of 42 in JavaScript?

A). String

B). Boolean

C). Number

D). Object

What is the result of typeof Symbol('id')?

A). symbol

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A). array

B). object

C). number

D). list

What is the result of typeof undefined?

A). undefined

B). null

C). object

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Which symbol is used to denote a string template literal?

A). ''

B).

C). ``

D). {}

What will typeof NaN return?

A). number

B). NaN

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Which operator checks both value and type for equality in JavaScript?

A). ==

B). !=

C). ===

D). !==

What is the result of null === undefined?

A). 1

B). 0

C). Error

D). NaN

What is the output of '5' + 3?

A). 8

B). 53

C). 8

D). Error

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

A). String

B). Number

C). Object

D). Boolean