1	A Do-It-Yourself store sells a large range of goods. The checkout at the store is shown below. Each item for sale has a bar code printed on it, as shown in the diagram above. When an item is purchased, a bar code reader at the checkout reads the bar code on the item. Give two pieces of information about an item likely to be contained in the bar code. (2 points)
	Resource 1

2	Information about each item is also stored in a central computer. This information is accessed using the bar code. Give two pieces of information about an item which are likely to be stored by the central computer, but not on the bar code. (1 point)

3	The bar code contains a check digit. What is the purpose of a check digit? (1 point)

4	Describe briefly how a check digit works. (1 point)

5	Every week staff in the store carry out a stock check. The forms they use to record the stock levels are input to the computer system using optical character recognition (OCR). Why must staff be careful with their handwriting when filling in the OCR forms? (1 point)

6	The store is considering using palmtop computers for stock checks. Suggest two advantages that palmtop computers may have over using OCR forms. (2 points)

7	In the office, data from invoices is keyed into the computer system. This data must be verified. Suggest two ways in which the invoice data may be verified. (2 points)

8	The company needs to employ more staff to work in their data processing division. They advertise for applicants for the following jobs. (i). Systems analysts (ii). Computer programmers Describe briefly each of these jobs. (1 point)