What is the result of null === undefined?

What is the output of typeof null?

A). null

B). undefined

C). object

D). number

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 will typeof [1, 2, 3] return?

A). array

B). object

C). number

D). list

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

A). toString()

B). parseInt()

C). String()

D). Number()

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

A). function

B). object

C). undefined

D). number

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

A). String

B). Number

C). Object

D). Boolean

What is the data type of 42 in JavaScript?

A). String

B). Boolean

C). Number

D). Object

Which symbol is used to denote a string template literal?

A). ''

B).

C). ``

D). {}

Which of the following is a falsy value in JavaScript?

A). 0

B).

C). null

D). All of the above