What is the output of typeof null?

What is the data type of true in JavaScript?

A). String

B). Boolean

C). Number

D). Object

What is the data type of 42 in JavaScript?

A). String

B). Boolean

C). Number

D). Object

What is the result of typeof Symbol('id')?

A). symbol

B). object

C). string

D). undefined

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

A). String

B). Number

C). Object

D). Boolean

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

A). ==

B). !=

C). ===

D). !==

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

A). parseInt()

B). toString()

C). toNumber()

D). parseStr()

What is the data type of an array in JavaScript?

A). Array

B). Object

C). Collection

D). List

Which function can convert a number to a string in JavaScript?

A). toString()

B). parseInt()

C). String()

D). Number()

What will typeof [1, 2, 3] return?

A). array

B). object

C). number

D). list

How do you declare a variable with an undefined value?

A). let x;

B). let x = '';

C). let x = 0;

D). let x = null;