• No.1

1. Fault:
   for (int i=x.length-1; i > 0; i--)
   should be
   for (int i=x.length-1; i >= 0; i--)
2. Test: x = NULL; y=1
   Expected: NullPointerException
   Actual: NullPointerException
3. Test: x=[1, 2, 3]; y=3
   Expected is 2;
   Actual is 2;
4. Test: x=[1, 2, 3]; y=4
   Expected is -1;
   Actual is -1;

• No.2

1. Fault
   for (int i = 0; i < x.length; i++)
   should be
   for (int i = x.length-1; i>=0; i--)
2. Test: x=[ ];
   Expected: NullPointerException
   Actual: NullPointerException
3. Test: x=[0];
   Expected is 0;
   Actual is 0;
4. Test: x=[1, 2, 3];
   Expected is -1;
   Actual is -1;

Homework 2