Answer:
See explanation
Step-by-step explanation:
An instance of such program written in python is
isum = 0
for i in range(1,11):
isum = isum + i
print(sum)
One of the ways the program can give a wrong result is when someone alters the program source program before it's complied and executed.
Take for instance.
Changing
isum = 0 to isum = 4
will alter the result by additional 4
Another way is if an outside program or process alters the program execution.