A program is being written which only accepts numbers in the range 1 to 100 (inclusively) to be input. Validation routines are being used to check the input data.

a Name two validation routines which could be used to check the input data in this program. Give a reason for your choice in each case.

b Test data can be normal, abnormal or extreme. Explain the differences in these three types of test data. Use examples to illustrate your answer.

c For this program being written, indicate, by ticking the appropriate box, whether the following input data is normal, abnormal or extreme.

d Explain what is meant by live data.
Describe how live data is used.

Normal Abnormal Extreme [] () 52 52 1 104 100 twenty-five 99