Variables and Data Types

Compiled language

Interpreted Language

Both compiled and interpreted language

None of the Above

var

let

const

static

let 1name;

let #name;

let _name;

let $_name;

It debugs the entire code

The log will go inside the variable, extract their information and show it on the console.

It creates a memory block in system

It is used to delete the variable's block of memory

var is block-scoped, let and const are function-scoped.

var is function-scoped, let and const are block-scoped.

var and let are block-scoped, const is function-scoped.

All are block-scoped.

Array

Object

Symbol

Function

null

undefined

object

string

"My age is " + age;

My age is ${age};

"My age is ${age}";

Both a and b

Using typeof

Using instanceof

Using Object.prototype.toString.call()

All of the above

"105"

15

NaN

"55"