软件测试作业（2）— fault、 error and failure

题目如图：

1. Identify the fault

       (1)i start 0, not 1.

       (2)  for return the first 0, not the last in x.

      2. If possible, identify a test case that does not execute the fault.

       (1) have no one

       (2) have no one

     3. If possible, identify a test case that executes the fault, but does not result in an error state.

       (1) test: x = [1,2,3]; y=3

       (2) test: x = [0,1,2];

     4. If possible identify a test case that results in an error, but not a failure.

       (1) test: x = [1,2,3]; y=4

       (2) test: x = [1,1,2];