JavaScript Quiz - Level 3

1. What will the following code log? console.log([] + [])

"" (empty string)

[]

undefined

NaN

A block-level scope

A private function

A function with access to its outer scope even after the outer function has finished executing

A self-invoking function

undefined

The global object (window in browsers)

null

The function itself

Await can be used anywhere

Await can only be used inside an async function

Await works without async

Await can only be used with Promises

true

false

undefined

NaN

Object.assign(target, source)

Object.copy(target, source)

{ ...source }

clone(source)

Creates a new function with a specified "this" value

Binds only the arguments of a function

Immediately calls the function with bound arguments

Binds the function to a loop

You can assign default values while destructuring

It only works with arrays

Default values are not allowed

It only works with objects

NaN

number

undefined

string