database-modeling-data-in-the-organization Related Question Answers

1. A rectangle represents which of the following in an ERD?





2. An entity name should be which of the following?





3. An oval represents which of the following in an ERD?





4. When the minimum and maximum number of instances of an entity is one, you know which of the following?





5. An attribute name should be which of the following?





6. A composite attribute is which of the following?





7. A binary relationship cannot be which of the following?





8. A ternary relationship involves how many entities?





9. When the minimum number of instances of an entity is one, you know which of the following?





10. A good business rule is which of the following?





11. An attribute is a person, place, object, event in a user environment.



12. Output reports should be included as part of an ERD.



13. Cardinality specifies the number of instances of one entity that can be associated with each instance of another entity.



14. Relationships cannot have attributes.



15. Business rules and policies are universal.



16. A relationship is an association representing the interaction between attributes.



17. A binary relationship is a relationship between two or more entities.



18. Some business rules cannot be represented in common data modeling notation.



19. A time stamp is a time value that is associated with a data value.



20. A logical representation of the data for an organization or for a business area is known as an entity-relationship model.



21. A derived attribute is an attribute whose values can be calculated from a related relationship.



22. A fact is a word or phrase that has a specific meaning for the business.



23. A strong entity is an entity whose existence depends on some other entity type.



24. Multiple and binary relationships are the same thing.



25. No two attributes of the same entity type should have the same name.



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