2
a) A company receives hundreds of orders every week through the mail. Explain carefully how BATCH- PROCESSING might be used. Describe the role of the BATCH TOTAL in this process. Explain how batch total is calculated. [6]
b) Explain how errors in data submitted to a computer program are corrected during batch processing. [4]
c) Explain why there is less batch-processing now than in the past. [2]
d) Select any TWO of the processes below and describe the full internal processing that occurs. The files involved are likely to be very large.
i Merging two sorted data files into key order.
ii Sorting a data file into ascending key order.
iii Updating a master file on-line.
