Question from the Algorithmics - Fundamentals test

What is the name of the sort method used in the following code ?

        function sort(A, first, last) 
         {
                If first < last 
                {
                      pivot <-- pivot_choice(A, first, last)
                      pivot <-- partition(A, first, last, pivot)
                      sort(A, first, pivot-1)
                      sort(A, pivot+1, last)
                 }
        }