How does the typeof operator handle arrays 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.

What will be the output of typeof {} in JavaScript?

A). object

B). array

C). null

D). undefined

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

A). 123

B). '123'

C). NaN

D). 1

What is the result of typeof undefined in JavaScript?

A). undefined

B). string

C). null

D). object

What is the result of typeof NaN in JavaScript?

A). number

B). NaN

C). undefined

D). string

How does JavaScript evaluate Boolean(0)?

A). 1

B). 0

C). null

D). undefined

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

A). symbol

B). object

C). string

D). null

What does the typeof operator return for an undefined variable?

A). undefined

B). number

C). boolean

D). string

What does typeof window.evaluate evaluate to in JavaScript?

A). function

B). object

C). string

D). undefined

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