Software project Management jobs (II.)

Homework One

public int FindLast (int[] x, int y) {
Effects:if X==null Throw NullPointerException
else return the index of the last element
In x that equals Y.
If No such element exists, return-1
for (int i=x.length-1; i > 0; i--)
{
if (x[i] = = y)
{
return i;
}
}
return-1;
}
Test:x=[2, 3, 5]; y = 2
Expected = 0

1) The For loop should end at i<=0

2) x=[] The pointer is empty and cannot reach fault

3) x=[1,2,3],y=2 fault reachable at this time without causing error status

4) x=[3,4,5],y=2 causes error

Homework Two

public static int Lastzero (int[] x) {

Effects:if X==null Throw

NullPointerException

else return the index of the last 0 in X.

Return-1 If 0 does not occur in X

for (int i = 0; i < x.length; i++)

{

if (x[i] = = 0)

{

return i;

}

}

return-1;

}

Test:x=[0, 1, 0]

Expected = 2

1) The loop should be changed to for (int i = x.length-1; I >= 0; i++)

2) The pointer is abnormal, no matter how it will enter the loop, enter the loop to enter the fault

3) x=[0], at which point the program arrives at the fault statement, but does not cause the error state

4) x=[0,1,2] Cause error

Software project Management jobs (II.)