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

What is the output of '5' + 3?

A). 8

B). 53

C). 8

D). Error

Which of the following is a falsy value in JavaScript?

A). 0

B).

C). null

D). All of the above

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()

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 Symbol('id')?

A). symbol

B). object

C). string

D). undefined

What will typeof NaN return?

A). number

B). NaN

C). undefined

D). object

What is the data type of 42 in JavaScript?

A). String

B). Boolean

C). Number

D). Object

What is the result of null === undefined?

A). 1

B). 0

C). Error

D). NaN

What is the result of typeof undefined?

A). undefined

B). null

C). object

D). number