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

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

A). symbol

B). object

C). string

D). undefined

What is the result of typeof undefined?

A). undefined

B). null

C). object

D). number

Which symbol is used to denote a string template literal?

A). ''

B).

C). ``

D). {}

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

A). ==

B). !=

C). ===

D). !==

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

A). String

B). Number

C). Object

D). Boolean

What will typeof NaN return?

A). number

B). NaN

C). undefined

D). object

What is the output of '5' - 3?

A). 2

B). 2

C). 53

D). Error

What is the output of typeof function() {}?

A). function

B). object

C). undefined

D). number

What is the data type of 42 in JavaScript?

A). String

B). Boolean

C). Number

D). Object

How do you declare a variable with an undefined value?

A). let x;

B). let x = '';

C). let x = 0;

D). let x = null;