Worksheet »

1. Answer 1
2. A data fault occurs when something happens incorrectly to data, such as incorrect initialisation of variables at the start of a program, whilst a control fault is an incorrect control statement in a program such as IF or WHILE which causes a loop or decision point to be incorrectly executed.
3. Complexity is 4.  Either count the number of decision points (3) and add one or count the number of areas enclosed by the flowchart, including one for the 'outside' area.
4. The least riskiest form of system changeover is one where there is an easy way to fallback on the old system, such as parallel running or pilot running.  Under some circumstances, a phased cutover may be suitable, provided that there is no need to go back to the old functionality.
5. Impact analysis involves taking a software change request and identifying what work needs to be carried out in order to implement the requested change.