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 output of typeof null?

A). null

B). undefined

C). object

D). number

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

A). array

B). object

C). number

D). list

What is the result of typeof undefined?

A). undefined

B). null

C). object

D). number

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

A). parseInt()

B). toString()

C). toNumber()

D). parseStr()

What will typeof NaN return?

A). number

B). NaN

C). undefined

D). object

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

A). function

B). object

C). undefined

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

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

A). ==

B). !=

C). ===

D). !==