Review Questions Chapter 2-2

The object-oriented model ________.

Adds semantic content

The network database models have ________.

An owner/member relationship that promotes database integrity

What is the name for the most current version of the ERD?

Crow's Foot Notation

In response to the increasing complexity of applications, two new data models emerged: the object-oriented data model and the ________ relational data model.

Extended

Which model represents the end users' view of the data environment?

External

A specific representation of an external view is known as a(n) ________.

External Schema

Which data model contains the least semantics?

Hierarchical

Classes are organized as a class ________.

Hierarchy

In the OO data model, a class ________ represents a real-world action such as finding a selected PERSON's name.

Method

In the object-oriented data model (OODM), both data and their relationships are contained in a single structure known as a(n) ________.

Object

How is an entity represented in an ERD?

Rectangle

From an end-user perspective, any SQL-based relational database application involves three parts: a user interface, a set of tables stored in the database, and the ________.

SQL Engines

What modern development gave the use of complex objects a boost?

The Internet

XML databases have emerged to address the need to manage ________ data within the native XML format.

Unstructured

A way of classifying data models is by degree of ________.

abstraction

Database models can be grouped into two categories: conceptual models and ________ models.

implementation

Each row in the relational table is known as an entity ________.

instance

Data models were developed to ________.

model real-world objects or events

Which data model contains the most semantics?

object-oriented

The ERDM is primarily geared to business applications, while the OODM tends to focus on ________ applications.

very specialized engineering and scientific