30 Questions
What is the primary purpose of constraints in a data model?
To ensure data integrity
What is the main goal of business rules in data modeling?
To develop relationship participation rules and constraints
What is the source of business rules in an organization?
A combination of company managers, policy makers, department managers, and written documentation
What do nouns translate into in a data model?
Entities
What is the purpose of translating business rules into data model components?
To enable communication between users and designers
What is the direction of relationships in a data model?
Bidirectional
What is the primary objective of naming conventions in data modeling?
To make the object unique and distinguishable from other objects
What type of statements are business rules typically written as?
Precisely written and unambiguous statements
What do cardinalities determine in an entity?
The minimum and maximum number of entity occurrences
What is the relationship between business rules and data modeling?
Business rules form the basis of the data modeling process
What is the purpose of a precisely written business rule?
To define one or more modeling components
What is the result of inadequate business rules in data modeling?
A failure in the database design
What is a critical factor in the success of a design?
Accuracy of operations description
What is an example of a business rule?
An invoice contains one or more invoice lines
How many stores can an employee be employed by?
One
What is a characteristic of the relationship between a college and its departments?
A college has many departments
How many clients can sign a contract?
Only one
What is a characteristic of the relationship between a driver and vehicles?
A driver can drive multiple vehicles and a vehicle can be driven by multiple drivers
What is the purpose of the external model in data abstraction?
To provide a view of the data environment for end users.
Which of the following is NOT a typical business unit in a company?
Human Resources
What is the primary focus of an application in a business unit?
To have a specific business unit focus.
Why do end users view their data subsets as separate from other units in the organization?
Because they operate in an environment with specific constraints and requirements.
What is the name of the architecture that defines the three levels of data abstraction?
ANSI/SPARC architecture
What type of diagrams are used to represent the external views in data modeling?
ER diagrams
What is the main purpose of the conceptual model in database design?
To provide a global view of the entire database
What is the ER model used for?
To integrate all external views into a single view
What is the internal model in database design?
A representation of the database as seen by the DBMS
What is the purpose of the entity-relationship diagram (ERD)?
To graphically represent the conceptual schema
What is the conceptual schema also known as?
The conceptual schema
What is the primary purpose of the conceptual model?
To provide a global view of the entire database
Learn about the importance of constraints in ensuring data integrity and how business rules help in developing relationships and correct data models. Understand how they aid in understanding business processes and roles.
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