Computer Sysyetm Analyst Chapter 6

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1. What is object-oriented analysis, and what are some advantages of this method?
Object-oriented analysis is a style of analysis that is created on concepts of object, class, inheritance and methods. Some benefits can be that objects can symbolize people, things in a system more accurately and objects can be changed into reusable codes and components.

5. Define encapsulation and explain the benefits it provides.
Encapsulation means that all data and methods are self-contained within an object. Some uses are it prevents changes to an objects internal code by another object or process by limiting access to internal processes. It also allows objects to be used as a sectional component anywhere in the system because objects send and receive messages but do not change the internal processes of other objects.

6. Define polymorphism and provide three examples.
Polymorphism means one kind of object can look like another kind of object.
Some examples: The message “Eat” could have three different meanings:
Parent: Time to cook dinner
Child: Are you hungry?
Neighbor: Time to go home

9. Define a use case and a use case diagram and prepare a sample of each.

Use cases are steps in a specific business function or process in UML (Unified Modeling Language).

MOTHER-ACTOR USE CASE

10. Define the term black box and explain why it is an important concept in object-oriented analysis.
Black box theory is an example of encapsulation to show how changes can be generated inside an object without identifying how the changes must be carried out. Viewing objects as black boxes is important to object-oriented analysis because this kind of analysis does not see data and processes as separate components as structured analysis does.

SCR Associates Online Case

Session 6: Object Modeling
Tasks
1. I…...

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