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What is the difference between partition sort and quick sort?
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Quicksort is a divide-and-conquer algorithm. It works by selecting a 'pivot' element from the array and partitioning the other elements into two sub-arrays, according to whether they are less than or greater than the pivot. For this reason, it is sometimes called partition-exchange sort.
The quick sort is internal sorting method where the data is sorted in main memory. The merge sort is external sorting method in which the data that is to be sorted cannot be accommodated in the memory and needed auxiliary memory for sorting.
Quicksort is commonly used in practice because it's faster, but Heapsort is used when memory usage is a concern.
Partition is called n times – The pivot element x is not included in any recursive calls. One call of Partition takes O(1) time plus time proportional to the number of iterations of FOR-loop.
Quicksort is a Partitioning Sorting Algorithm, you might refer to Mergesort which also is a Partitioning Sorting Algorithm, the biggest difference is probably the speed, Quicksort is faster even though both of them are O(n*log(n)).
Quicksort uses a Pivot element for its sorting and MergeSort divides & conquers. Both however are in-place sorting algorithms, which means they don't use any extra memory when sorting.
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