Author Question: Describe the state of an object and explain its relation to attribute and object identity. What ... (Read 150 times)

beccaep

  • Hero Member
  • *****
  • Posts: 535
Describe the state of an object and explain its relation to attribute and object identity.
 
  What will be an ideal response?

Question 2

What is the the relationship between use cases and use case diagrams?
 
  What will be an ideal response?



Animal_Goddess

  • Sr. Member
  • ****
  • Posts: 339
Answer to Question 1

An object has a set of attributes and these attributes accept a range of values. The combination of these attributes and their associated values constitute the state of an object: an infant boy grows to be a 80-year-old man; a sapling becomes a tree; a student becomes a graduate. While the identity of the object remains the same, its state might change.

Answer to Question 2

Use cases are a set of developed, structured use cases for the system or the subsystems that you are developing. It is likely that you have to revise the use cases later on, but this set must be good enough to sustain the next step of development: dynamic and structural modeling of the conceptual system. At least one diagram for the subsystem is necessary to summarize the uses cases and the relationships with the actors and each other. If a use case has too many extend and/or include relationships, you may create diagrams for the subset. But never, never feel that it is a good idea to create one diagram per use case. A use case diagram does not show what goes inside the use case.



Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
 

Did you know?

Walt Disney helped combat malaria by making an animated film in 1943 called The Winged Scourge. This short film starred the seven dwarfs and taught children that mosquitos transmit malaria, which is a very bad disease. It advocated the killing of mosquitos to stop the disease.

Did you know?

An identified risk factor for osteoporosis is the intake of excessive amounts of vitamin A. Dietary intake of approximately double the recommended daily amount of vitamin A, by women, has been shown to reduce bone mineral density and increase the chances for hip fractures compared with women who consumed the recommended daily amount (or less) of vitamin A.

Did you know?

The human body produces and destroys 15 million blood cells every second.

Did you know?

Blastomycosis is often misdiagnosed, resulting in tragic outcomes. It is caused by a fungus living in moist soil, in wooded areas of the United States and Canada. If inhaled, the fungus can cause mild breathing problems that may worsen and cause serious illness and even death.

Did you know?

Approximately 500,000 babies are born each year in the United States to teenage mothers.

For a complete list of videos, visit our video library