Cisy 222/Bbit 231: System Analysis And Design Question Paper
Cisy 222/Bbit 231: System Analysis And Design
Course:Computer Science And Business Information
Institution: Kenya Methodist University question papers
Exam Year:2013
KENYA METHODIST UNIVERSITY
END OF 3''RD ''TRIMESTER 2013 (FT) EXAMINATION
FACULTY : COMPUTING & INFORMATICS
DEPARTMENT : COMPUTER SCIENCE AND BUSINESS INFORMATION
UNIT CODE : CISY 222/BBIT 231
UNIT TITLE : STSTEM ANALYSIS AND DESIGN
TIME : 2 HOURS
INSTRUSTIONS: Answer question one and any other two.
Question One
Explain the role of system analyst in system construction and implementation phase.
(4mks)
When designing user interface it is important to distinguish between different types of computer users.
Outline the different categories of computer users.
(2mks)
What interface design considerations should be put in place for each category of users.
(4mks)
Explain two technological factors that influence information systems development.
(5mks)
Describe how prototyping can be used to improve in the development of an information system.
(5mks)
Feasibility study, done at the preliminary phases o system development lifecycle, is never over. Discuss.
(5mks)
Explain two technological factors that influence information systems development.
(5mks)
Describe how prototyping can be used to improve in the development of an information system.
(5mks)
Explain five general principles that are important to output design. (5mks)
Question Two
When choosing what project to undertake next, you identify, classify and rank the projects before making the selection. Give six different considerations other than urgency and feasibility.
(6mks)
Prototyping is useful during the analysis and design phases if users are involved in the evaluation of the prototype. Describe three disadvantage of prototyping.
(6mks)
Describe four types of information systems
(4mks)
After you have identified some of the requirement for as system, you need to check that your understanding is correct. Describe two ways in which you could do this.
(4mks)
Question Three
A university has a web-based coursework system, which allows students to request complete and submit online coursework. Lecturers have a user id and password. Once identified they can submit names of their students to the system, or request student marks. Student have a user id and password. The system checks that the student has not completed assignment previously. (i.e that no mark is registered for this particular student and the assignment requested) if the student is eligible the system will request an assignment from the database server (an external entity) when the assignment is received. It is displayed for the student to complete. Students submit the assignment by clicking a SUBMIT button. The system processes the assignment, the result is displayed to the student and written to a file.
Draw a context diagram for the web-based coursework system.
(5mks)
Draw a top-level DFD for the web-based coursework system. Outline any assumptions made.
(15mks)
Question Four
Cashier at Kenya towers are given the following instructions for admitting persons to the park.
If the person is under 3 years, there is no admission fee
if a person is under 16, half the admission is charged. This admission is reduced to a quarter of full admission if the person is accompanied by an adult (this reduction only applied if the person is under 12)
Between 16 and 18 half the full admission fee is charged If the person is a student, otherwise full admission fee applied
For person over 18, the full admission fee is charged
A discount of 10% is given to people over 16 if charged
There are no student concessions on weekends
Write a decision table which reflects the statement above.
(9mks)
Identify additional information required to complete the decision table.
Write a decision tree which reflects the statement above.
(6mks)
What is the difference between preventive maintenance and adaptive maintenance?
(2mks)
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