Q
Which method can be used to convert a string to a number in JavaScript?

Answer & Solution

Answer: Option A
Solution:
The parseInt() function parses a string argument and returns an integer.
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What is the data type of true in JavaScript?

A). String

B). Boolean

C). Number

D). Object

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A). toString()

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What is the data type of an array in JavaScript?

A). Array

B). Object

C). Collection

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How do you declare a variable with an undefined value?

A). let x;

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C). let x = 0;

D). let x = null;

What is the result of null === undefined?

A). 1

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A). String

B). Boolean

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What is the output of '5' + 3?

A). 8

B). 53

C). 8

D). Error

What is the result of typeof undefined?

A). undefined

B). null

C). object

D). number

What is the result of null == undefined?

A). 1

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

A). ==

B). !=

C). ===

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