Which of the following values is considered falsy in JavaScript?

What will typeof null return in JavaScript?

A). null

B). undefined

C). object

D). number

How can you check if a variable is an array in JavaScript?

A). typeof variable === 'array'

B). Array.isArray(variable)

C). variable instanceof array

D). variable.constructor === array

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

A). 30

B). 1020

C). 30

D). NaN

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

A). number

B). string

C). boolean

D). undefined

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

A). number

B). string

C). NaN

D). undefined

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 is the initial type of a variable declared with let a;?

A). null

B). number

C). undefined

D). object

Given the code: let y = 10; y = true;, what is the type of y after execution?

A). number

B). boolean

C). string

D). object

What is the result of typeof [] in JavaScript?

A). array

B). object

C). list

D). undefined

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

A). null

B). string

C). object

D). undefined