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Database Life Cycle
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Design Subject
Application Approach Design
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Requirements Analysis
Requirements Analysis
Define Business Objects
BO Characteristics
Business Rules Importance
Interview Data Users
Data Flow Diagram
Creating User Views
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Requirements Analysis Conclusion
Attributes and Entities
Entities Conceptual Model
Store Entity Values
Rules for Creating Identifiers
Entity Instances
Attribute Domains Types
Multivalued Attribute
Multi-Valued Attributes
Multivalued Attribute(resolve)
Entity Attribute Constraints
Module Summary
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ERD Concept
Three Relationship Types
One to One Relationships
Identify one To One
One to many Relationships
Identify One to Many
Define many To Many
Identify Many To Many
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Convert m:n to 1:n
Mandatory Optional Relationship
Optional Participation Relationships
ERD Conclusion
ERD Conventions
ER Diagram
Three Model Types
idef1x Crowsfoot Chen Models
Entity Attribute Relationship
ER Diagram Types
Crow's Foot Notation
DB Participation Types
Interview End- Users
Verbalize ER Diagram
ER diagram model Types
Requirements Analysis - Quiz
Answer all five questions. Each is worth one point. For checkbox questions, select the exact set of correct answers: partial selections or extra choices earn no credit.
1.
Which tasks belong to requirements analysis in the lifecycle taught in this course?
Please select all the correct answers.
A.
The final logical schema is created
B.
Data users are interviewed
C.
Existing databases are examined
D.
Tasks are documented
2.
Which of the following statements regarding business rules are true?
Please select all the correct answers.
A.
Business rules place constraints on fields and table relationships.
B.
Imposing business rules as constraints helps preserve data integrity.
C.
The database designer creates an organization’s business rules.
D.
Business rules are subject to change as an organization grows.
3.
Which statement about business objects is true?
Please select the best answer.
A.
Every business object must relate directly to every other business object.
B.
Every business object has characteristics it shares with every other business object.
C.
A business object can be either tangible or intangible.
4.
In Yourdon/DeMarco data flow notation, which symbol represents a process?
Please select the best answer.
A.
Arrows
B.
Parallel lines
C.
Circles
D.
Squares
5.
Which are requirements-analysis deliverables in this course (with a DFD included when needed)?
Please select all the correct answers.
A.
An objects list
B.
A finalized physical storage and index design
C.
A data flow diagram
D.
A business rules list
Submit