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

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

A). toString()

B). parseInt()

C). String()

D). Number()

Which of the following is a falsy value in JavaScript?

A). 0

B).

C). null

D). All of the above

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

A). array

B). object

C). number

D). list

What will typeof NaN return?

A). number

B). NaN

C). undefined

D). object

What is the output of '5' + 3?

A). 8

B). 53

C). 8

D). Error

What is the data type of true in JavaScript?

A). String

B). Boolean

C). Number

D). Object

What is the result of typeof undefined?

A). undefined

B). null

C). object

D). number

How do you declare a variable with an undefined value?

A). let x;

B). let x = '';

C). let x = 0;

D). let x = null;

What is the result of null == undefined?

A). 1

B). 0

C). Error

D). NaN

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

A). ==

B). !=

C). ===

D). !==