What is the result of null == undefined?

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 typeof undefined?

A). undefined

B). null

C). object

D). number

What is the data type of true in JavaScript?

A). String

B). Boolean

C). Number

D). Object

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

A). String

B). Number

C). Object

D). Boolean

What is the output of '5' + 3?

A). 8

B). 53

C). 8

D). Error

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

A). ==

B). !=

C). ===

D). !==

What is the data type of 42 in JavaScript?

A). String

B). Boolean

C). Number

D). Object

What will typeof NaN return?

A). number

B). NaN

C). undefined

D). object

Which symbol is used to denote a string template literal?

A). ''

B).

C). ``

D). {}

What is the output of '5' - 3?

A). 2

B). 2

C). 53

D). Error