I got a paper containing code of a C function. The interviewers left the room for 5-10 minutes so I can study the code, then returned and asked questions about the code.

1. What does the following code do?

2. What changes would you make to improve the code (not regarding performance)?

void func(int array[ARRAY_SIZE]) { int p = 0; for (int r = 0; r < 4; r++) { for (int i = p; i < ARRAY_SIZE; i++) { if (array[i] % 5 == r) { if (i != p) { int temp = array[p]; array[p] = array[i]; array[i] = temp; } p++; } } } }