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College of Computer and Information Sciences
Department of Information Systems
IS 240 "Information Systems Analysis and Design"
Section No:
Subject: Mid-Term
Date:
Instructor: Dr. Abdullah Alghamdi
Duration: 90 minutes
Student
Name:
Part 1
ID:
(10 marks)[
/4]Question 1
Prototyping is an iterative process of the SDLC where the system is continually revised.
Draw a diagram illustrating the major steps and deliverables of the prototyping approach.
[ /3]Question 2
Order the following types of DFD according to their appearance in the SDLC life cycle, by
putting numbers (1,2,3,4)in the square brackets:
[ ]Current Logical DFD,
[ ]Current Physical DFD,
[ ]New Logical DFD,
[ ]New Physical DFD
[ /3]Question 3
Is the spiral SDLC evolutionary? Illustrate your answer diagrammatically.
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Part 2
marks)[ /10]Question 1
(30
Using the example of a retail clothing store in a mall, list relevant data flows, data
stores, processes, and sources/sinks. Observe several sales transactions.
Draw a context diagram and a level-0 diagram that represent the selling
system at the store.
[ /10]Question 2
a. List the DFD symbols used in the context diagram (only names).
b. Give two small DFD examples, the first represents the timing aspect of a system and the
second shows a process that is executed 4 times in another system?.
c. Give an example of an unbalanced DFD. Show how to balance it.
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[ /10]Question 3
a. Based on the description given to you in the class, complete the following Decision Table.
b Draw a reduced version of the resultant decision table.
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Part 2
marks)[ /6]Question 1
(10
Give an example ER diagram for each of the following cases:
1. Unary relationship with optional many at one end and obligatory one at the other end
2. Ternary relationship
3. Associative entity
[ /4]Question 2
Fill in the spaces
- The relationship degree is related to the entity ……………………..
- The relationship cardinality is related to the entity ……………….
- Gathering information for conceptual modeling can have two perspectives
top-…………... And ……………....-……………..…..
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