FiltersDone

Question type

Essay

Multiple Choice

Short Answer

True False

Matching

Exam 2: Data Models

Show Answer

Share

---

All types

Filters

Study FlashcardsPractice ExamLearn

Question 41

Short Answer

Review LaterAdd Note

Review Later

A(n)is a brief,precise,and unambiguous description of a policy,procedure,or principle within a specific organization.

Correct Answer

verified

Show Answer

Question 42

Essay

Review LaterAdd Note

Review Later

What are the sources of business rules,and what is the database designer's role with regard to business rules?

Correct Answer

verified

The main sources of business rules are c...

View Answer

Show Answer

Question 43

True/False

Review LaterAdd Note

Even when a good database blueprint is available,an applications programmer's view of the data should match that of the manager and the end user.

Today,most relational database products can be classified as object/relational.

A(n) enables a database administrator to describe schema components.

In the model,the user perceives the database as a collection of records in 1:M relationships,where each record can have more than one parent.

An implementation-ready data model should contain a description of the data structure that will store the end-user data.

A(n) represents a particular type of object in the real world.

In ,a three­pronged symbol represents the "many" side of the relationship.

In the model,each parent can have many children,but each child has only one parent.

A(n) 's main function is to help one understand the complexities of the real­world environment.

In Chen notation,entities and relationships have to be oriented horizontally; not vertically.

The data model uses the concept of inheritance.

In an SQL-based relational database,each table is dependent on every other table.

M:N relationships are not appropriate in a relational model.