Business Rules and Constraints

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What is the primary purpose of constraints in a data model?

To create a correct data model

To develop business rules

To understand business processes

To ensure data integrity (correct)

What is the main goal of business rules in data modeling?

To develop relationship participation rules and constraints (correct)

To standardize the company's view of data

To create a correct data model

To understand business processes

What is the source of business rules in an organization?

A combination of company managers, policy makers, department managers, and written documentation (correct)

Only department managers

Only company managers

Only policy makers

What do nouns translate into in a data model?

Entities (C) Signup and view all the answers

What is the purpose of translating business rules into data model components?

To enable communication between users and designers (B) Signup and view all the answers

What is the direction of relationships in a data model?

Bidirectional (B) Signup and view all the answers

What is the primary objective of naming conventions in data modeling?

To make the object unique and distinguishable from other objects (C) Signup and view all the answers

What type of statements are business rules typically written as?

Precisely written and unambiguous statements (D) Signup and view all the answers

What do cardinalities determine in an entity?

The minimum and maximum number of entity occurrences (A) Signup and view all the answers

What is the relationship between business rules and data modeling?

Business rules form the basis of the data modeling process (C) Signup and view all the answers

What is the purpose of a precisely written business rule?

To define one or more modeling components (C) Signup and view all the answers

What is the result of inadequate business rules in data modeling?

A failure in the database design (C) Signup and view all the answers

What is a critical factor in the success of a design?

Accuracy of operations description (B) Signup and view all the answers

What is an example of a business rule?

An invoice contains one or more invoice lines (B) Signup and view all the answers

How many stores can an employee be employed by?

One (B) Signup and view all the answers

What is a characteristic of the relationship between a college and its departments?

A college has many departments (D) Signup and view all the answers

How many clients can sign a contract?

Only one (C) Signup and view all the answers

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 (D) Signup and view all the answers

What is the purpose of the external model in data abstraction?

To provide a view of the data environment for end users. (C) Signup and view all the answers

Which of the following is NOT a typical business unit in a company?

Human Resources (D) Signup and view all the answers

What is the primary focus of an application in a business unit?

To have a specific business unit focus. (C) Signup and view all the answers

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. (B) Signup and view all the answers

What is the name of the architecture that defines the three levels of data abstraction?

ANSI/SPARC architecture (C) Signup and view all the answers

What type of diagrams are used to represent the external views in data modeling?

ER diagrams (B) Signup and view all the answers

What is the main purpose of the conceptual model in database design?

To provide a global view of the entire database (A) Signup and view all the answers

What is the ER model used for?

To integrate all external views into a single view (C) Signup and view all the answers

What is the internal model in database design?

A representation of the database as seen by the DBMS (C) Signup and view all the answers

What is the purpose of the entity-relationship diagram (ERD)?

To graphically represent the conceptual schema (C) Signup and view all the answers

What is the conceptual schema also known as?

The conceptual schema (A) Signup and view all the answers

What is the primary purpose of the conceptual model?

To provide a global view of the entire database (C) Signup and view all the answers