A computer system for a shop stores information about each customer. The items of information include name and address (both postal and email) together with payment details and order history. The system also stores the product categories they are interested in and how they would like to be contacted.

1. (a)(i)The shop wants to add a program module that will generate emails to be sent to customers who may be interested in receiving details of new products. State three items of information that the new module would need. Justify your choice in each case. Information Justification Information Justification Information Justification[3]
2. (a)(ii)Identify two items of customer information that would not be required by the new module. Justify your choice in each case. Information Justification Information Justification[2]
3. (b)The program includes a module to validate a Personal Identification Number (PIN). This is used when customers pay for goods using a bank card. A state-transition diagram has been produced for this module. The table show the inputs, outputs and states for this part of the program: Current state | Input | Output | Next state --------------|-----------------|------------------|----------- S1 | Input PIN | | S2 S2 | Re-input PIN | Display error | S2 S2 | Cancel | Re-prompt | S1 S2 | Valid PIN | Enable payment | S4 S2 | Too many tries | Block Account | S3 Complete the state-transition diagram to represent the information given in the table. [Figure 7.1][4]

This question uses a diagram from the original paper, which isn't shown here. Open the full paper from the past papers archive to see it.