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Systems Analysis And Design (Bbit 231) (Cisy 221) 1St Trimester 2017 Question Paper

Systems Analysis And Design (Bbit 231) (Cisy 221) 1St Trimester 2017

Course:Bachelor Of Business Information Technology

Institution: Kenya Methodist University question papers

Exam Year:2017

SYSTEMS ANALYSIS AND DESIGN (BBIT 231) (CISY 221) 1ST TRIMESTER 2017
KENYA METHODIST UNIVERSITY

END OF 1'ST 'TRIMESTER 2017 (PT) EXAMINATION

SCHOOL : SCIENCE AND TECHNOLOGY
DEPARTMENT : COMPUTER SCIENCE
UNIT CODE : BBIT 231/CISY 221
UNIT TITLE : SYSTEMS ANALYSIS AND DESIGN
TIME : 2 HOURS

Instructions:

Answer Question ONE and any other TWO.
Question One (30 Marks)

A university has a web-based coursework system. Which allows students to request complete and submit online course work. Lectures have a user id and a password. Once identified, they can submit names of their students to the system or request students marks. Students have a user Id and a password. The student checks that the student has not completed assignments 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’s displayed for the student to complete. Student 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.

Required:

Explain the importance of creating models in systems development.
(5 marks)
Draw a context diagram for the web-based coursework system.
(5 Marks)
Draw a top-level DFD for the web-based coursework system.
(6 Marks)
When choosing what project, you identify, classify and rank the project before making the selections. Give four different considerations to be made.
(4 Marks)
Prototyping is useful during the analysis and design phases if users are involved in the evolution of the prototype. Describe THREE disadvantage of prototyping.
(6 Marks)
Spiral model for increment development has four phases. Name them and describe the deliverables for each phase.

(4 Marks)

Question Two (20 Marks)

One of the stages of system development is testing. In this context, state the difference between the following:
(4marks)
(i) Verification and validation

(ii) Testing and debugging

Explain the role of system analyst in system construction and implementation phase.
(8 Marks)
When designing user interface, it’s important to distinguish between different types of computer users.
(i) Outline the different categories of computer users. (4 Marks)
(ii) What interface design consideration should be put in place for each category? (4 Marks)

Question Three (20 Marks)

Feasibility study, done at preliminary phase of system development lifecycle, is never over. Discuss the relevance of this statement.
(5 Marks)
Explain two technological factors that influence information system development.
(5 Marks)
Describe how prototyping can be used to improve in the development of an Information System. Provide a suitable diagram.
(10 Marks)

Question Four (20 Marks)

Describe FIVE types of information systems, and give an example of each.(10 Marks)
Describe data and process modeling, and name the main data and process modeling techniques.
(6 Marks)
What is the importance of testing systems?
(4 marks)

Systems Analysis And Design (Bbit 231) (Cisy 221) 1St Trimester 2017 Question Paper

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