Exam Notes
Chapters 8, 9 + 10Be sure and read chapters 8 and 9.
Data ModellingKnow the process
- Define entities.
- Build a context diagram (showing relationships).
- Build a key based data model(hierarchies, associative entites).
- Build a fully attributed data model
- Normalize the data model (1 2 3 normal forms)
look at normalization diagram on page 323
Process ModellingKnow the process
- Build context diagram
- Build decomposition (subsystems)
- Use case analysis
- Know diagrams on page 299
- Be able to explain relationships
- Be able to talk thru the different data/process models
- Be able to explain normalization
- Explain feasability and what it is
- Draw up a entity relationship diagram and a data flow diagram
Test structure- 9 short answer
- true/false
- fill in the blank
5:45 room 840
Cardinalilty
Cardinality is the minimum and maximun number of occurrences of one entity that may be related to a single occurance of another entity (or the same entity in a
recursive relationship.)
Degree is the number of entities that participate in a relationship.
Relationships
A
relationship is a natural business association between one or more entities. It is important to identify and describe the relationships because they describe how entities work together, and on a higher level, how the entire system works.
A
non-specific relationship is a relationship where many instances of one entitiy are associated with many instances of another entity.
dear blogger,
What should one do if they somehow end up making it so that no one is the administrator of a blog? In this case no one can change the settings or add team members. The only thing anyone is able to do is post. ???
Also, please stop with the word verification on all posts.
thank you,
r_r
