Originally posted by connie
ok my school did the independant trial but we got given the catholic one afterwoulds and i was wondering what people wrote for question 21 c ii "critically evaluate the devlopers..." and 22 c "select and justify..."
thanx
Section II (Total marks - 40)
Question 21 (10 marks)
(c) (ii)
Sample Answer
The developers use of the IPO chart and data flow diagrams tend to indicate they are following a structured approach. In one sense this is beneficial because they are following a sound method and this should result in the delivery of a quality system.
Three key points are stated in the question including, the manager is non-technical, a system is wanted in 5-6 weeks and the current system is manual. Therefore, showing the IPO chart and data flow diagram are the least suitable tools for helping the clients and the developer understand the system requirements.
An IPO chart simply shows what goes into the system, what processing occurs and what comes out. A data flow diagram shows the flow of data within the system. These tools alone are not sufficient to represent a system. Other models are needed to represent hardware, storage, decisions and time frames.
These diagrams are too technical and will most likely confuse the store manager. It is unlikely a system could be delivered in the desired timeframe if this approach is adhered to and a Gantt chart would be more suitable for scheduling.
------------------------------------------------------------------------------------
Question 22 (10 marks)
(c)
Sample Answer
(I like this particular bit here, so I'll type it up too for you guys).
Note: teachers will need to use their own judgement in marking this question. Reasonable cases could be argued for object orientated databases as well as expert systems (with some AI) and it is felt there will be some students who will argue for them.
The best answer is intended to be a relational database.
Relational databases are a database design strategy based on mathematical set theory. Relational databases are constructed by separating data into smaller tables. These tables are quite similar to a flat file database. In relational databases, tables that contain data having a natural association are connected or related.
Relating tables is achieved by adding foreign keys or by creating transaction tables between the two tables. Relational databases minimise redundancy and are very good for large data sets. The smaller tables are easier to maintain because data integrity is improved and it is easier to locate data that may require modification.
------------------------------------------------------------------------------------
Please use the
search button in future
It is in this thread:
2002 IPT Trial Answers?
http://www.boredofstudies.org/community/showthread.php?s=&threadid=10436
See my last post, it will have all Section II answers, to the
2003 CSSA IPT Trial.
