Database Management: Exam 1 (Ch. 1 & 2)

E. F. Codd developed the relational model in the:

1970's

Database development begins with ________, which establishes the range and general contents of organizational databases

Enterprise Data Modeling

(T/F) A business rule is a statement of how a policy is enforced or conducted

FALSE

(T/F) An example of a term would be the following sentence: "A student registers for a course."

FALSE

(T/F) Most systems developers believe that data modeling is the least important part of the systems development process.

FALSE

(T/F) The intent of a business rule is to break down business structure

FALSE

(T/F) When systems are automatically generated and maintained, quality is diminished.

FALSE

Which of the following is NOT a cost and/or risk of the database approach

Improved responsiveness

Which of the following is NOT a good characteristic of a data name?

Relates to a technical characteristic of the system

The traditional methodology used to develop, maintain and replace information systems is called the

Systems Development Life Cycle (SDLC)

(T/F) A business rule is a statement that defines or constrains some aspect of the business.

TRUE

(T/F) A business rule should be internally consistent.

TRUE

(T/F) A good data definition is always accompanied by diagrams, such as the entity-relationship diagram.

TRUE

(T/F) A single occurrence of an entity is called an entity instance.

TRUE

(T/F) An entity is a person, place, object, event, or concept in the user environment about which the organization wishes to maintain data

TRUE

(T/F) Data names should always relate to business characteristics.

TRUE

(T/F) Enforcement of business rules can be automated through the use of software tools that can interpret the rules and enforce them.

TRUE

(T/F) One of the roles of a database analyst is to identify and understand rules that govern data.

TRUE

(T/F) The E-R model is used to construct a conceptual model.

TRUE

(T/F) When choosing an identifier, choose one that will not change its value often.

TRUE

(T/F) While business rules are not redundant, a business rule can refer to another business rule.

TRUE

Which of the following is NOT an objective that drove the development and evolution of database technology?

The desire to require programmers to write all file handling functionality

The SDLC phase in which the detailed conceptual data model is created is the ________ phase.

analysis

In a file processing environment, descriptions for data and the logic for accessing the data are built into:

application programs

An entity type name should be all of the following EXCEPT

as short as possible

A property or characteristic of an entity type that is of interest to the organization is called a(n):

attribute

A person's name, birthday, and social security number are all examples of:

attributes

A ________ defines or constrains some aspect of the business

business rule

An attribute that can be broken down into smaller parts is called a(n) ________ attribute

composite

A rule that CANNOT be violated by database users is called a:

constraint

Data modeling may be the most important part of the systems development process because:

data characteristics are important in the design of programs and other systems components.

A graphical system used to capture the nature and relationships among data is called a(n):

data model

The number of entity types that participate in a relationship is called the:

degree

Customers, cars, and parts are examples of:

entities

A person, place, object, event, or concept about which the organization wishes to maintain

entity

The logical representation of an organization's data is called a(n):

entity-relationship model

The most common source of database failures in organizations is

failure to implement a strong database administration function.

Program-data dependence is caused by:

file descriptors being stored in each application.

A(n) ________ is the relationship between a weak entity type and its owner.

identifying relationship

Which of the following is NOT a characteristic of a good business rule?

inconsistent

The three-schema approach includes which of the following schemas?

internal

Older systems that often contain data of poor quality are called ________ systems.

legacy

A database is an organized collection of ________ related data

logically

Business policies and rules govern all of the following EXCEPT

managing employees

Data that describe the properties of other data are:

metadata

Which organizational function should set database standards?

none

All of the following are properties of metadata EXCEPT

processing logic

One of the most popular RAD methods is:

prototyping

All of the following are primary purposes of a database management system (DBMS) EXCEPT:

providing an integrated development environment.

Which of the following is NOT an advantage of database systems

redundant data

Relational databases establish the relationships between entities by means of common fields included in a file called a(n):

relation

________ are established between entities in a well-structured database so that the desired information can be retrieved.

relationships

A centralized knowledge base of all data definitions, data relationships, screen and report formats, and other system components is called a(n):

repository

A knowledge base of information or facts about an enterprise is called a(n):

repository

With the database approach, data descriptions are stored in a central location known as a:

repository

An attribute of an entity that must have a value for each entity instance is a(n):

required attribute

An attribute that must have a value for every entity (or relationship) instance is a(n):

required attribute

A workgroup database is stored on a central device called a:

server

The most common types of entities are:

strong

Which of the following is an entity that exists independently of other entity types?

strong entity

A fact is an association between two or more:

terms

A simultaneous relationship among the instances of three entity types is called a ________ relationship.

ternary

In an E-R diagram, there are/is ________ business rule(s) for every relationship

two

A relationship between the instances of a single entity type is called a ________ relationship

unary

Because applications are often developed independently in file processing systems:

unplanned duplicate data files are the rule rather than the exception.

A(n) ________ is often developed by identifying a form or report that a user needs on a regular basis.

user view

An entity type whose existence depends on another entity type is called a ________ entity

weak entity

A good data definition will describe all of the characteristics of a data object EXCEPT:

who can delete the data