What is the result of typeof undefined?

What is the data type of 42 in JavaScript?

A). String

B). Boolean

C). Number

D). Object

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 null?

A). null

B). undefined

C). object

D). number

What is the result of typeof Symbol('id')?

A). symbol

B). object

C). string

D). undefined

What is the output of '5' - 3?

A). 2

B). 2

C). 53

D). Error

What is the result of null == undefined?

A). 1

B). 0

C). Error

D). NaN

Which of the following is a falsy value in JavaScript?

A). 0

B).

C). null

D). All of the above

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

A). String

B). Number

C). Object

D). Boolean