What is the result of typeof undefined?

What is the data type of an array in JavaScript?

A). Array

B). Object

C). Collection

D). List

Which of the following is a falsy value in JavaScript?

A). 0

B).

C). null

D). All of the above

What is the output of '5' + 3?

A). 8

B). 53

C). 8

D). Error

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

A). String

B). Number

C). Object

D). Boolean

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

A). ==

B). !=

C). ===

D). !==

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

A). array

B). object

C). number

D). list

What is the output of typeof null?

A). null

B). undefined

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 method can be used to convert a string to a number in JavaScript?

A). parseInt()

B). toString()

C). toNumber()

D). parseStr()