Iterative QuickSort Example in Java - without Recursion

The quicksort algorithm is one of the important sorting algorithms. Similar to merge sort, quicksort also uses divide-and-conquer hence it's easy to implement quicksort algorithm using recursion in Java, but it's slightly more difficult to write an iterative version of quicksort. That's why Interviewers are now asking to implement QuickSort without using recursion. The interview will start with something like writing a program to sort an array using quicksort algorithm in Java and most likely you will come up with a recursive implementation of quicksort as shown here. As a follow-up, Interviewer will now ask you to code the same algorithm using Iteration.
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