What is the result of typeof undefined in JavaScript?

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

A). 123

B). '123'

C). NaN

D). 1

How does JavaScript evaluate typeof 'Hello'?

A). string

B). object

C). undefined

D). null

How does the instanceof operator behave with primitive values in JavaScript?

A). Throws an error

B). Returns true for all primitive values

C). Returns false for all primitive values

D). Primitive values cannot be used with instanceof

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

A). symbol

B). object

C). string

D). null

What will be the output of typeof null in JavaScript?

A). object

B). null

C). undefined

D). string

What does typeof new Date() evaluate to in JavaScript?

A). date

B). object

C). string

D). null

How does the typeof operator handle arrays in JavaScript?

A). array

B). object

C). undefined

D). null

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.

What does the typeof operator return for an undefined variable?

A). undefined

B). number

C). boolean

D). string

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

A). function

B). object

C). undefined

D). null