Week5_Tutorial_ICT703_T323 (1)

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Questions extracted from: Alan Dennis, Barbara Wixom, Roberta M. Roth, 2018, Systems Analysis and Design, 7 th ed., Wiley ICT703 Tutorial Compiled by: Anupam Makhija T3 2023: ICT703 Information Systems Analysis and Design Tutorial 5 Topic: Process Modelling Submission: Five minutes before the end of the tutorial. Instructions: Form a group of 2-4 students and complete the group activities. After the discussion, each student answers the questions individually in their own words. Part A: MCQs 1. What does a Data Flow Diagram (DFD) represent? a) The physical layout of a database system. b) The sequence of actions in a process. c) The flow of data and processes in a system. d) The hierarchical structure of an organization. 2. What is a Data Store in a DFD? a) A process that transforms data. b) An external entity that interacts with the system. c) A temporary storage location for data within the system. d) A flowchart representing the system's structure. 3. Which level of DFD represents the most detailed view of a system? a) Level 0 DFD b) Level 1 DFD c) Level 2 DFD d) Level 3 DFD
Questions extracted from: Alan Dennis, Barbara Wixom, Roberta M. Roth, 2018, Systems Analysis and Design, 7 th ed., Wiley ICT703 Tutorial Compiled by: Anupam Makhija 4. Which of the following is a benefit of using DFDs? a) DFDs can automatically generate code for the system. b) DFDs provide a detailed view of the system's physical components. c) DFDs help in identifying potential bottlenecks and inefficiencies. d) DFDs eliminate the need for testing and debugging. Part B: Qn 1. Explain the relationship between a DFD context diagram and the DFD level 0 diagram. Answer The Level 0 diagram goes into further depth about a system's internal workings, whereas the context diagram offers a high-level summary of how a system interacts with outside entities. While the Level 0 diagram illustrates the main processes and their relationships within the system, the context diagram is more abstract and concentrates on the boundaries of the system. Qn 2. Explain the process of balancing a set of DFDs. Answer Making sure that data flows are consistent amongst the various tiers of the hierarchy is necessary to balance a collection of data flow diagrams (DFDs). It entails confirming the overall accuracy of the diagrams, preserving data store integrity, and confirming that inputs and outputs correspond between layers. Qn 3. Explain the use of Decision trees in process descriptions. Answer Decision trees help to simplify complicated processes and improve communication by graphically representing decision points, conditions, and potential outcomes in a clear and straightforward manner. Qn 4. Consider the DFD in the Figure below and list three errors (rule violations) on this DFD. Answer Three major errors in Figure 6-20 here 1 Process 1.0 (P2) has only inputs, making it a "black hole". 2 DF5 is moving from E1 to DS1 without any process 3 DF1 is moving from EQ to E2 without any process Qn 5.
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