What is the result of typeof undefined in JavaScript?

How does the instanceof operator work in JavaScript?

A). Checks if an object has a specific prototype in its prototype chain.

B). Checks if two variables are of the same type.

C). Checks if a variable is null.

D). Checks if a variable is undefined.

How does JavaScript evaluate typeof 'Hello'?

A). string

B). object

C). undefined

D). null

What does typeof window.evaluate evaluate to in JavaScript?

A). function

B). object

C). string

D). undefined

What does Number('123') return in JavaScript?

A). 123

B). '123'

C). NaN

D). 1

How does JavaScript evaluate typeof /^regex$/ in JavaScript?

A). regexp

B). object

C). string

D). null

What is the output of typeof Symbol('id') in JavaScript?

A). symbol

B). object

C). string

D). null

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

A). function

B). object

C). undefined

D). null

How does the typeof operator handle arrays in JavaScript?

A). array

B). object

C). undefined

D). null

What will be the output of typeof null in JavaScript?

A). object

B). null

C). undefined

D). string

What will be the output of [] instanceof Array in JavaScript?

A). 1

B). 0

C). null

D). undefined