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CAPE INFORMATION TECHNOLOGY (2011)Paper 02 — Unit 1 EXEMPLARS

Module 2

Question 5

This candidate was awarded full marks.

The candidate produced a correctly labelled diagram of the software development life cycle (SDLC) withall the stages properly sequenced. For each of the three tools given, the candidate specified the stagethat it would be most appropriately used and how it is used. In addition, a full explanation of theimportance of training of users (or operators) in the SDLC process was also provided.

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CAPE INFORMATION TECHNOLOGY (2011)Paper 02 Unit 1 EXEMPLARS

Module 3

Question 3

The candidate performed outstandingly providing the quality of response expected at the CAPE level.

The candidate provided a clear definition of the ‘Internet’ and fully explained two of the threetelecommunication terms. An incorrect explanation of modulation was presented. Modulation is in factthe conversion of digital to analogue signals. Instead, the candidate defined the reverse process (i.e.,analogue to digital) which is known as demodulation,

In part (b), the candidate presented a correctly labelled diagram with the appropriate directional arrowsto support the explanation of the concept of automated information processing. Overall, the candidateshowed sound knowledge of the role of the Internet and in explaining the components of automatedinformation processing.

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CAPE I NFORMATION TECHNOI.OGY (2011)Paper 02 — Unit 1 EXEMPLARS

Module 2

Question S

Overall, the candidate’s response to this question was of a very high quality.

Part (a) was the only portion of the question for which marks were lost. The candidate provided adefinition for a Data Flow Diagram (DFD) but failed to comment on its usefulness. This response couldhave been improved by including that the usefulness of the DFD comes from the fact that it models thebehaviour of the existing or proposed systems to developers and stakeholders such as users andmanagers.

In parts (b) and (c), the candidate correctly identified the four symbols that are used in a DFD andproduced an accurate model of the DFD based on the given scenario. The major entities and major dataflows were included in the diagram and all symbols were properly named in accordance with theirnaming conventions.

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CAPE INFORMATION TECHNOLOGY (2011)Paper 02 — Unit 1 EXEMPLARS

Module 3

Question 9

The candidate’s response reflected a sound understanding of the concepts of algorithms, flowcharting and programming as problem-solving strategies.

In part (a), the candidate only identified two of the three programming paradigms and providedtwo examples. To gain full marks in this portion of the question, the candidate could haveidentified other paradigms such as Functional (e.g. Haskell Python), Declarative (e.g. Prelog,SQL) or Scripting (e.g. Unix, Linux).

In part (b), the candidate fully explained the benefit of developing an algorithm prior to writingprogram code.

The candidate produced a flowchart that contained all the steps, but that included thefollowing two incorrect statements: (n = n + n) and n/k. The correct statements should havebeen, “Sum sum + n” and “Average = sum/k”, that is, another variable should be used to storethe total of scores entered.

In part (d), the candidate correctly identified the type of error based on the given scenario. Inaddition, a valid cause of the error and a solution for correcting each of the errors wasprovided.