Quiz answers - CH 1

Pataasin ang iyong marka sa homework at exams ngayon gamit ang Quizwiz!

Organizations that utilize the file processing approach spend as much as ________ of their IS development budget on maintenance.

80 percent

Which of the following is software used to create, maintain, and provide controlled access to databases?

Database management system (DBMS)

Organizing the database in computer disk storage is done in the ________ phase

Design

A user view is how the user sees the data when it is produced.

False

An enterprise data model describes the scope of data for only one information system.

False

Database development projects are never done in a bottom-up fashion.

False

Repositories are always used in file processing systems.

False

The conceptual schema is always technology specific.

False

The scope of an enterprise application is one workgroup or department.

False

The steps of the systems development life cycle can only be viewed as a linear process.

False

________ analyze the business situation and identify the need for information and information services to meet the problems or opportunities of the business.

Systems analysts

A data model is a graphical system used to capture the nature and relationships among data.

True

A person is an example of an entity.

True

A physical schema contains the specifications for how data from a conceptual schema are stored in a computer's secondary memory.

True

Although personal databases improve productivity, one risk is that data cannot be shared with other users.

True

An extranet uses Internet protocols to establish limited access to company data by the company's customers and suppliers.

True

Data from prior systems is converted to the new system during the implementation phase of the systems development life cycle.

True

Database maintenance is typically the longest step of the database development process.

True

Development starts from scratch with the traditional file processing approach because new file formats, descriptions, and file access logic must be designed for each new program.

True

E. F. Codd developed the relational data model during the 1970s.

True

Each member of a workgroup accesses data located on a database server.

True

End users can often retrieve and display data easily with a relational database.

True

In practice, databases today may contain either data or information.

True

In prototyping, implementation and maintenance activities are repeated as necessary until the product is correct.

True

Information is processed data.

True

Metadata are data that describe the properties of other data

True

Multitier client/server database applications contain a business logic layer.

True

Separation of metadata from application programs that use the data is called data independence

True

Separation of metadata from application programs that use the data is called data independence.

True

The repository is populated during the analysis phase of the systems development life cycle.

True

Unplanned duplicate data files are the rule rather than the exception in file processing systems.

True

Which of the following will interfere with access to operational databases?

Unstructured and unpredictable use of data

A user view is:

a logical description of some portion of the database.

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

CASE is a class of tools that

automates the design of databases and application programs

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

constraint

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

data model

One disadvantage of file processing systems is:

limited data sharing

A database is an organized collection of ________ related data.

logically

One of the most popular RAD methods is:

prototyping

A data warehouse derives its data from

various operational data sources

A relatively small team of people who collaborate on the same project is called a(n):

workgroup


Kaugnay na mga set ng pag-aaral

System Analysis & Design - Chapter 6

View Set

Accounting 711 Garrison Chapter 6

View Set

Chapter 12: Conception & Fetal Development

View Set

Live Virtual Machine Lab 7.3: Module 07 Cloud Concepts

View Set

Ethics of Cybersecurity - Exam 1

View Set

Module 2: Basic Switch and End Device Configuration

View Set

Chapter 48 - Neurons, Synapses, and Signaling

View Set

Chapter 13 Lesson 3: Layers of Atmosphere

View Set