Fullstack Developer

Features:
1- All the products should come from Backend APIs.
2- Create user registration and login flow. ( With email id and password)
3- Password should be encrypted.
4- Add product to wishlist feature
5- Add to wishlist should work without login and if the user has something on wishlist it should
be there on wishlist too after login too.

You are given a positive integer K. Your task is to find out whether K is a perfect number or not.

Note :

Perfect numbers are those numbers that are equal to the sum of all its proper divisors. 

Proper divisors are all the divisors of a number excluding the number itself. 

For example :

For K = 6, the proper divisors of 6 are 1, 2, 3 and its sum is 6 so 6 is a perfect number. For K = 8, the proper divisors of 8 are 1, 2,4 and its sum is 7 so 8 is not a perfect number.

What will be the output the question ?

var grade='D';  var result;  switch(grade)  {  case'A':          result+="10";  case'B':          result+=" 9";  case'C':          result+=" 8";  case 'D'  result+=" 6";  default:          result+=" 0";  }  document.write(result);

What will be the output of the following code snippet?(function(a){ return (function(){   console.log(a);   a = 6; })()})(21);

What is the async/await and Why we used it ?

What is nested callbacks and why we use promises over callbacks?

what is virtual dom and why we used it ? Can you explain 2 hooks?

Why we use Nextjs in this projects and what is the advantage to used Nextjs?

What is the difference between GET and POST request?

What is the closure and what is the lexical scope ?

What is the difference between local storage and session storage?