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

What is the outcome of typeof undefined in JavaScript?

A). String

B). Undefined

C). Null

D). Number

What is the data type of the value 42 in JavaScript?

A). String

B). Boolean

C). Number

D). Null

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

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

A). Number

B). Boolean

C). Object

D). String

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

A). Symbol

B). Object

C). Array

D). Function

Which data type represents a block of reusable code in JavaScript?

A). String

B). Object

C). Function

D). Number

What will let x = null; console.log(typeof x); output in JavaScript?

A). Object

B). Null

C). Undefined

D). Number

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

A). Object

B). Array

C). Function

D). Boolean

Which operator checks if an object is an instance of a specific object type in JavaScript?

A). instanceof

B). typeof

C). isInstanceof

D). isTypeOf