What will typeof NaN return in JavaScript?

What is the result of typeof [] in JavaScript?

A). array

B). object

C). list

D). undefined

What happens when you add a number and a string in JavaScript?

A). An error is thrown

B). The number is converted to a string

C). The string is converted to a number

D). Both are converted to boolean

What does the isNaN function do?

A). Checks if a value is not a number

B). Converts a value to a number

C). Checks if a value is a number

D). Converts a value to NaN

What does the parseInt function do in JavaScript?

A). Converts a number to a string

B). Converts a string to an integer

C). Converts a boolean to a number

D). Converts an array to a number

Which of the following values is considered falsy in JavaScript?

A). 1

B). 0

C). 0

D). {}

What is the type of the value returned by parseFloat('3.14abc')?

A). number

B). string

C). NaN

D). undefined

In JavaScript, what will be the type of a variable x after x = 5 + true;?

A). number

B). string

C). boolean

D). undefined

What will typeof null return in JavaScript?

A). null

B). undefined

C). object

D). number

What is the type of the value returned by JSON.parse('null')?

A). null

B). string

C). object

D). undefined

Given let a = '10'; let b = 20;, what is the result of a + b?

A). 30

B). 1020

C). 30

D). NaN