System analysis and Design 

ORDINARY EXAMINATION FOR BACHELOR OF INFORMATION TECHNOLOGY

BBIT 121/BIT 3107  SYSTEMS ANALYSIS AND DESIGN

DATE: APRIL 2017                                                                         TIME: 2 HOURS

Instructions: Answer Question 1 and Any Other Two Questions.

QUESTION ONE (COMPULSORY) (30MKS)

1. Define the following terms                         (6 marks)
2. System
3. Computer based system

• Development methodology

1. Expound on the importance of system development to an organization (2marks)

1. Examine the concept of modeling and distinguish between logical and physical models                                                                                                  (4 marks)
2. Describe the role of Computer Assisted Software Engineering (CASE) tools in system development                                                                                                 (4marks)
3. Illustrate the importance of system testing and identify two types of tests that are used in system testing? (6maks)
4. Explain the concept of the systems development life cycle and clearly explaining the steps involved                                                                                                 (8marks)

QUESTION TWO

1. From this user requirements definition, formulate two System Requirements specification. “The software must provide a means of representing and accessing external files”                                                                                       (4 marks)
2. Why is it important that the analyst learns about an organization’s policies and objectives?                                                                                    (2 marks)
3. Expound on any four fact-finding methods used during the analysis Stage (8marks)
4. What information does the user’s request form provides and why is such information crucial in the initial investigation                                         (6mks)

QUESTION THREE

1. With examples explain closed questions and open-ended questions             (4 marks)
2. Elaborate why it is difficult to determine user requirements (4 marks)
3. What type of information is best obtained through interview method of user requirements gathering                                                                                                 (4 marks)
4. Compare and contrast the pros and cons of the DFDs and Decision trees as tools of doing analysis                                                                                                          (8 marks)

QUESTION FOUR

1. Discuss the activities in a feasibility study and the contents of the subsequent report                                                                                                 (6 marks)
2. Explain any two design methodologies that are applicable in system analysis and design today                                                                                                    (4 marks)
3. For each of the above methodologies identified above, describe how they may be applied by a systems development team suggesting the advantages and disadvantages of applying those                                                                                                                (4 marks)
4. Describe and clearly show the application of the following tools of the Structured Systems Analysis and Design Methodology (SSADM)                                     (6marks)
5. Data flow diagrams
6. Decision trees