Computing Essentials 2010
Answers to End-of-Chapter Materials
Chapter 12
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Multiple Choice
Answers
Matching
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Open Ended Questions:
1. Describe the five logical data groups or categories.
a. Numbers, letters, and symbols
b. Audio
c. Music
d. Photographs
e. Video
2. What is the difference between batch processing and real-time processing?
a. Batch
i. Data is collected over several hours, days, or even weeks, then processed
all at once
b. Real-time
i. Also known as online processing
ii. Occurs when data is processed at the same time the transaction occurs.
3. Identify and define the five parts of DBMS programs.
a. Allows users to create, modify, and gain access to a database, special software is
required.
b. Provides a bridge between the logical view of the data and the physical view of
the data.
c. The data definition subsystem defines the logical structure of the database by
using a data dictionary.
d. The data manipulation subsystem provides tools for maintaining and analyzing
data.
e. Provides tools to create data entry forms and specialized programming languages
that interface or work with common and widely used programming languages
4. What are the five types of databases? Why does more than one kind of database
exist?
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Computing Essentials 2010
a.
b.
c.
d.
e.
f.
Hierarchical database
Network database
Relational database
Multidimensional database
Object-oriented database
More than one exists because they are designed to work with data that is logically
structured or arranged in a particular way, and they define rules and standards for
all the data in a database.
5. What are some of the benefits and limitations of databases? Why is security a
concern?
Sharing- information from one department can be readily shared with others.
Security - Users are given passwords or access only to the kind of information
they need.
Less data redundancy - having access to one file, there are fewer files. Thus,
storage is reduced.
Data integrity - a change made to a file by one department will be seen by
other departments. Accuracy is improved.
Security is an issue because personal and private information about people stored
in databases may be used for the wrong purposes, and unauthorized users can gain access
to a database.
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