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

What is the output of typeof null?

A). null

B). undefined

C). object

D). number

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

A). ==

B). !=

C). ===

D). !==

How do you declare a variable with an undefined value?

A). let x;

B). let x = '';

C). let x = 0;

D). let x = null;

Which of the following is a falsy value in JavaScript?

A). 0

B).

C). null

D). All of the above

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

A). symbol

B). object

C). string

D). undefined

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

What is the data type of an array in JavaScript?

A). Array

B). Object

C). Collection

D). List

What is the data type of 42 in JavaScript?

A). String

B). Boolean

C). Number

D). Object

What is the output of '5' - 3?

A). 2

B). 2

C). 53

D). Error