What is the outcome of typeof undefined in JavaScript?

Which of the following is a primitive data type in JavaScript?

A). Object

B). Array

C). Function

D). Boolean

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

A). Array

B). Symbol

C). Map

D). Tuple

Which of these is a complex or reference data type in JavaScript?

A). Number

B). Boolean

C). Object

D). String

What is the data type of the value undefined in JavaScript?

A). Number

B). Boolean

C). String

D). Undefined

What will the following code snippet output: let a = 10; a += '5'; console.log(a); in JavaScript?

A). '105'

B). 105

C). 15

D). '15'

Which data type represents positive infinity in JavaScript?

A). Infinity

B). Number

C). NaN

D). Null

Which data type represents unique and immutable values in JavaScript introduced in ES6?

A). Symbol

B). Object

C). Array

D). Function

What is the result of 0 / 0 in JavaScript?

A). Infinity

B). 0

C). NaN

D). 1

Which data type represents an intentional absence of any value in JavaScript?

A). Null

B). Undefined

C). String

D). Number

What will let x = '10'; let y = x - 5; console.log(y); output in JavaScript?

A). '5'

B). 5

C). '10'

D). 10