Interview Questions

Some Translation

n! Multiplicative

Object-oriented programming

Check here Interview_Questions(OOP)

JavaScript

Closure.

<script>
function say667() {
  // Local variable that ends up within closure
  var num = 666;
  
  //var sayAlert = function() { alert(num); }
  return function() { num++; alert(num); };
}

var sayNumba = say667();
sayNumba();
sayNumba();
</script>

The example will keep var num in the memory. alert 667 and 668 on each call;