TEST 3 - big-comm.com

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17 Νοε 2013 (πριν από 3 χρόνια και 11 μήνες)

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TEST 3

Student: ___________________________________________________________________________

1.

_____ is any data or instructions sent to the computer.


A.

Digital

B.

Output

C.

Information

D.

Input



2.

The arrangement of keys on a keyboard, QWERTY
reflects the keyboard layout by:


A.

representing the phonetics of the alphabets most closely associated with the keyboard.

B.

taking the letters of the first six alphabetic characters found on the top row of keys.

C.

using the alphabetic characters most f
requently used on the keyboard.

D.

using the letters of the alphabetic characters that are closest to access while typing.



3.

If your wrist is getting strained from repetitive typing, it is advisable to use a(n)


A.

ergonomic keyboard

B.

wireless
keyboard

C.

traditional keyboard

D.

flexible keyboard



4.

A keyboard key, like Caps Lock, that turns a feature on or off is called a _____ key.


A.

power

B.

toggle

C.

function

D.

combination



5.

This type of mouse is currently the most widely used.


A.

M
echanical

B.

Cordless

C.

Wireless

D.

Optical



6.

Instead of using a mouse, you can use this pointing device to control the pointer by rotating a ball with your
thumb.


A.

Pointing stick

B.

Touchpad

C.

Joystick

D.

Trackball



7.

Tablet PCs and PDAs use a


A.

joy stick

B.

light pen

C.

stylus

D.

mouse



8.

Which of the following is not a type of scanning device?


A.

Optical scanner

B.

Bar code reader

C.

Light pen

D.

Character and mark recognition device



9.

Which of the following types of character
recognition systems is used for standardized multiple
-
choice
testing?


A.

UPC

B.

MICR

C.

OMR

D.

OCR



10.

_____
-
input devices convert sounds into a form that can be processed by the system unit.


A.

Electrolyzing

B.

Plotting

C.

WebCam

D.

Audio



11.

The
most widely used audio
-
input device is the


A.

WebCam

B.

radio frequency card reader

C.

microphone

D.

stylus



12.

The individual dots that form the image on a monitor are called


A.

picas

B.

bits

C.

pixels

D.

bytes



13.

These are the most widely used typ
e of monitor today.


A.

Flat
-
panel monitors

B.

CRT monitors

C.

Projector monitors

D.

E
-
book readers



14.

Used commonly for classroom presentations, _____ connect to microcomputers to give output similar to a
monitor.


A.

scanners

B.

HDTV

C.

e
-
books

D.

data projectors



15.

What kind of specialized monitor is especially useful for graphic artists, designers and publishers?


A.

Flat
-
panel monitor

B.

CRT monitor

C.

High
-
definition television (HDTV)

D.

e
-
books



16.

Which of the following printer feature
s enables you to print on both sides of a sheet of paper?


A.

Simplex

B.

Duplex

C.

Resolution

D.

Dual Matrix



17.

Hard disks store and organize files using all the following, except


A.

tracks

B.

sectors

C.

cylinders

D.

paths



18.

An internal hard disk


A.

provides a variable amount of storage

B.

provides a fixed amount of storage

C.

is easily portable

D.

is generally slow



19.

Which of the following is not a utility to ensure backup and adequate performance of an internal hard disk?


A.

Backup

B.

Disk C
leanup

C.

Disk Defragmenter

D.

Internet Explorer



20.

Which of the following is not an example of secondary storage?


A.

External hard drives

B.

RAID

C.

RAM

D.

Flash drives



21.

Storage that retains its data after the power is

turned off is referred to as


A.

volatile storage

B.

sequential storage

C.

direct storage

D.

nonvolatile storage



22.

The ____ indicates how much data a particular storage medium can hold.


A.

access

B.

capacity

C.

memory

D.

storage



23.

One way to impr
ove the storage capacity of a hard disk is to


A.

format often

B.

use file compression

C.

increase memory

D.

use Linux



24.

This process improves system performance by acting as a temporary high
-
speed holding area between a
secondary storage device and
the CPU.


A.

Data compression

B.

Data access

C.

Disk caching

D.

RAID



25.

Which of the following statements on RAIDs is incorrect?


A.

provide expanded storage capability

B.

have a fast access speed

C.

are highly reliable

D.

are composed on one
high
-
capacity hard disk drive



26.

Three ways to improve the performance of a hard disk include


A.

disk caching, RAID, and file expansion

B.

file compression, disk caching, and file encryption

C.

disk caching, RAID, and file compression

D.

RAID, file com
pression and disk expansion



27.

A CD
-
RW disc


A.

can be written to only once.

B.

can be erased and rewritten.

C.

holds more data than a DVD.

D.

is an example of solid state storage.



28.

All of the following are true of DVD
-
ROM drives except


A.

they ar
e also known as erasable optical discs.

B.

they can provide over two hours of high
-
quality video and sound comparable to that found in motion picture
theatres.

C.

they are a type of optical disc.

D.

DVD
-
ROM stands for "digital versatile disc

read only memo
ry".



29.

The standard for high definition optical discs is


A.

DVD
-
RAM

B.

HD DVD

C.

Blu
-
ray

D.

HD CD



30.

These discs have a capacity of 25 to 100 gigabytes.


A.

HD DVD

B.

CD

C.

DVD

D.

Blu
-
Ray



31.

Which of the following is not a type of secondary
storage?


A.

Memory

B.

Hard disks

C.

Optical discs

D.

Solid
-
state storage



32.

What is it called when servers on the Internet supply applications as a service, rather than a product?


A.

Digital versatile computing

B.

Service computing

C.

Cloud computing

D.

Optical computing



33.

Which of the following is not meant to store highly personalized or sensitive information?


A.

Online storage

B.

Flash drive

C.

Solid State storage

D.

Hard Disk drive



34.

Which of these is not a mass storage device?


A.

RAID sy
stem

B.

File server

C.

Optical disc

D.

Tape library



35.

One of the most dramatic changes in connectivity and communications in the past five years has been


A.

mobile telephones with wireless Internet connectivity

B.

chat rooms

C.

satellite uplinks

D.

ru
nning programs on remote computers



36.

Which physical connection is the fastest?


A.

Twisted pair

B.

Coaxial cable

C.

Fiber
-
optics

D.

Microwaves



37.

Microwave communication uses high frequency:


A.

radio waves

B.

infrared

C.

satellite communications

D.

optic fibers



38.

To _____ is to send data to a satellite.


A.

uplink

B.

downlink

C.

modulate

D.

demodulate



39.

The GPS device in an automobile uses which communication channel?


A.

Infrared

B.

Radio Frequency (RF)

C.

Microwave

D.

Satellite



40.

A w
idely available technology that uses existing telephone lines to provide high
-
speed connections is called


A.

WWAN

B.

3G/4G

C.

voiceband

D.

DSL



41.

Cellular services use _____ to provide wireless connectivity to the Internet.


A.

ADSL

B.

T1 and T3
cellular networks

C.

DSL

D.

3G and 4G cellular networks



42.

The greatest capacity for data transmission happens in ____ devices.


A.

voiceband

B.

medium band

C.

broadband

D.

mega
-
band



43.

A unique numeric address used by the computer to deliver e
-
mail
and to locate Web sites is called the


A.

domain address

B.

protocol address

C.

IP address

D.

Web address



44.

____ is the process of breaking down information sent or transmitted across the Internet into small parts called
packets.


A.

Protocol

B.

Bandwi
dth

C.

Identification

D.

Packetization



45.

The essential features of this include identifying sending and receiving devices, and packeting information for
transmission across the Internet.


A.

Simple mail transfer protocol

B.

Transmission control protoco
l/Internet protocol

C.

File transfer protocol

D.

hypertext transfer protocol



46.

This device enables connectivity between two LANS or a LAN and a larger network.


A.

Network gateway

B.

Node

C.

Hub

D.

Router



47.

A network in which the central computer
is a host to a cluster of other computers that in turn are hosts is called
a ____ network.


A.

star

B.

bus

C.

ring

D.

hierarchical



48.

If the majority of the processing power is centralized in one large computer and the nodes connected to it have
little
or no processing capability, it is called a ____ network.


A.

hybrid

B.

terminal

C.

peer
-
to
-
peer

D.

hierarchical



49.

Organizations use the following to allow suppliers and others limited access to their networks.


A.

intranets

B.

extranets

C.

firewalls

D
.

proxy servers



50.

This type of network topology does not use a specific physical layout.


A.

Hybrid

B.

Hierarchical

C.

Mesh

D.

Tree



51.

Describe alternatives to a traditional mouse.













52.

How is voice recognition technology being used
today?













53.

Briefly discuss the differences between CD, DVD, and Blu
-
ray discs.













54.

Describe the differences between the three major physical connection mediums: twisted
-
pair cable, coaxial
cable, and fiber
-
optic cable.













5
5.

Explain the difference between analog and digital signals.














TEST 3
Key



1.

(p.

188)

_____ is any data or instructions sent to the computer.


A.

Digital

B.

Output

C.

Information

D.

Input

Input is any data or instructions
that are used by a computer.




Difficulty: Easy

OLeary
-

Chapter 007 #1



2.

(p.

189)

The arrangement of keys on a keyboard, QWERTY reflects the keyboard layout by:


A.

representing the phonetics of the alphabets most closely associated with the keyboard.

B.

taking the letters of the first six alphabetic characters found on the top row of keys.

C.

using the alphabetic characters most frequently used on the keyboard.

D.

using the letters of the alphabetic characters that are closest to access while typing.

This name reflects the keyboard layout by taking the letters of the first six alphabetic characters found on the top
row of keys displaying letters.




Difficulty: Easy

OLeary
-

Chapter 007 #2



3.

(p.

189)

If your wrist is getting strained from repetitive

typing, it is advisable to use a(n)


A.

ergonomic keyboard

B.

wireless keyboard

C.

traditional keyboard

D.

flexible keyboard

Ergonomic keyboards are designed specifically to alleviate wrist strain associated with the repetitive movements
of typing.




Difficulty: Medium

OLeary
-

Chapter 007 #3



4.

(p.

189)

A keyboard key, like Caps Lock, that turns a feature on or off is called a _____ key.


A.

power

B.

toggle

C.

function

D.

combination

A toggle key turns a feature on or off.




Difficulty: Easy

OLeary

-

Chapter 007 #5



5.

(p.

191)

This type of mouse is currently the most widely used.


A.

Mechanical

B.

Cordless

C.

Wireless

D.

Optical

The optical mouse is currently the most widely used.




Difficulty: Easy

OLeary
-

Chapter 007 #6



6.

(p.

191)

Instead
of using a mouse, you can use this pointing device to control the pointer by rotating a ball with
your thumb.


A.

Pointing stick

B.

Touchpad

C.

Joystick

D.

Trackball

A trackball has a ball on the top that you move with your thumb.




Difficulty: Easy

OLeary
-

Chapter 007 #7



7.

(p.

192, 193)

Tablet PCs and PDAs use a


A.

joy stick

B.

light pen

C.

stylus

D.

mouse

A stylus is a penlike device commonly used with tablet PCs and PDAs.




Difficulty: Easy

OLeary
-

Chapter 007 #8



8.

(p.

193)

Which of the
following is not a type of scanning device?


A.

Optical scanner

B.

Bar code reader

C.

Light pen

D.

Character and mark recognition device

There are four types of scanning devices: optical scanners, card readers, bar code readers, and character and mark
reco
gnition devices.




Difficulty: Easy

OLeary
-

Chapter 007 #9



9.

(p.

196)

Which of the following types of character recognition systems is used for standardized multiple
-
choice
testing?


A.

UPC

B.

MICR

C.

OMR

D.

OCR

Optical
-
mark recognition (OMR) is used
to score standardized multiple
-
choice tests.




Difficulty: Medium

OLeary
-

Chapter 007 #12



10.

(p.

197)

_____
-
input devices convert sounds into a form that can be processed by the system unit.


A.

Electrolyzing

B.

Plotting

C.

WebCam

D.

Audio

Audio
-
input

devices convert sounds into a form that can be processed by the system unit.




Difficulty: Medium

OLeary
-

Chapter 007 #14



11.

(p.

197)

The most widely used audio
-
input device is the


A.

WebCam

B.

radio frequency card reader

C.

microphone

D.

stylus

A
microphone is the most widely used audio
-
input device.




Difficulty: Easy

OLeary
-

Chapter 007 #15



12.

(p.

200)

The individual dots that form the image on a monitor are called


A.

picas

B.

bits

C.

pixels

D.

bytes

Images are formed on a monitor by a
series of dots or pixels.




Difficulty: Easy

OLeary
-

Chapter 007 #16



13.

(p.

201)

These are the most widely used type of monitor today.


A.

Flat
-
panel monitors

B.

CRT monitors

C.

Projector monitors

D.

E
-
book readers

Flat
-
panel monitors are the most
widely used type of monitor today.




Difficulty: Easy

OLeary
-

Chapter 007 #17



14.

(p.

202)

Used commonly for classroom presentations, _____ connect to microcomputers to give output similar to
a monitor.


A.

scanners

B.

HDTV

C.

e
-
books

D.

data
projectors

Data projectors are specialized devices that connect to microcomputers and project computer output just as it
would appear on a monitor.




Difficulty: Easy

OLeary
-

Chapter 007 #20



15.

(p.

202)

What kind of specialized monitor is especially u
seful for graphic artists, designers and publishers?


A.

Flat
-
panel monitor

B.

CRT monitor

C.

High
-
definition television (HDTV)

D.

e
-
books

Output from HDTV is digital and can be used to create high
-
quality still images. This technology is very useful to
graphic artists, designers, and publishers.




Difficulty: Medium

OLeary
-

Chapter 007 #21



16.

(p.

204)

Which of the following printer features enables you to print on both sides of a sheet of paper?


A.

Simplex

B.

Duplex

C.

Resolution

D.

Dual Matrix

Duplex printing allows automatic printing on both sides of a sheet of paper.




Difficulty: Easy

OLeary
-

Chapter 007 #24



17.

(p.

223)

Hard disks store and organize files using all the following, except


A.

tracks

B.

sectors

C.

cylinders

D.

paths

Hard
disks store and organize files using tracks, sectors, and cylinders.




Difficulty: Hard

OLeary
-

Chapter 008 #1



18.

(p.

224)

An internal hard disk


A.

provides a variable amount of storage

B.

provides a fixed amount of storage

C.

is easily portable

D.

is generally slow

Internal hard disks provide fast access; however, they have a fixed amount of storage and cannot be easily
removed from the system cabinet.




Difficulty: Medium

OLeary
-

Chapter 008 #2



19.

(p.

224)

Which of the following is not a
utility to ensure backup and adequate performance of an internal hard
disk?


A.

Backup

B.

Disk Cleanup

C.

Disk Defragmenter

D.

Internet Explorer

To ensure adequate performance of your internal hard disk, you should perform routine maintenance and
periodica
lly make backup copies of all important files. For hard
-
disk maintenance and backup procedures you can
use the following: the Windows utilities Backup, Disk Cleanup, and Disk Defragmenter.




Difficulty: Medium

OLeary
-

Chapter 008 #3



20.

(p.

222)

Which
of the following is not an example of secondary storage?


A.

External hard drives

B.

RAID

C.

RAM

D.

Flash drives

RAM provides only temporary or volatile storage. Secondary storage provides permanent or nonvolatile storage.




Difficulty: Easy

OLeary
-

Chapter 008 #5



21.

(p.

222)

Storage that retains its data after the power is turned off is referred to as


A.

volatile storage

B.

sequential storage

C.

direct storage

D.

nonvolatile storage

Secondary storage is nonvolatile storage as it does not lose the

data when the power is turned off.




Difficulty: Easy

OLeary
-

Chapter 008 #7



22.

(p.

222)

The ____ indicates how much data a particular storage medium can hold.


A.

access

B.

capacity

C.

memory

D.

storage

Capacity measures how much a particular
storage medium can hold.




Difficulty: Easy

OLeary
-

Chapter 008 #9



23.

(p.

225)

One way to improve the storage capacity of a hard disk is to


A.

format often

B.

use file compression

C.

increase memory

D.

use Linux

File compression increases storage
capacity by reducing the amount of space required to store data and programs.




Difficulty: Medium

OLeary
-

Chapter 008 #11



24.

(p.

225)

This process improves system performance by acting as a temporary high
-
speed holding area between a
secondary
storage device and the CPU.


A.

Data compression

B.

Data access

C.

Disk caching

D.

RAID

Disk caching is the process of storing frequently used data from a disk into memory.




Difficulty: Medium

OLeary
-

Chapter 008 #12



25.

(p.

225)

Which of the
following statements on RAIDs is incorrect?


A.

provide expanded storage capability

B.

have a fast access speed

C.

are highly reliable

D.

are composed on one high
-
capacity hard disk drive

RAIDs improve performance by expanding external storage, improving
access speed, and providing reliable
storage through several inexpensive hard
-
disk drives connected to one another.




Difficulty: Medium

OLeary
-

Chapter 008 #13



26.

(p.

225)

Three ways to improve the performance of a hard disk include


A.

disk caching,

RAID, and file expansion

B.

file compression, disk caching, and file encryption

C.

disk caching, RAID, and file compression

D.

RAID, file compression and disk expansion

Three ways to improve the performance of hard disks are disk caching, RAID, and file
c
ompression/decompression.




Difficulty: Medium

OLeary
-

Chapter 008 #14



27.

(p.

226)

A CD
-
RW disc


A.

can be written to only once.

B.

can be erased and rewritten.

C.

holds more data than a DVD.

D.

is an example of solid state storage.

CD
-
RW stands for compact disc rewritable. They are also known as erasable optical discs.




Difficulty: Medium

OLeary
-

Chapter 008 #18



28.

(p.

227)

All of the following are true of DVD
-
ROM drives except


A.

they are also known as erasable optical discs.

B.

they can provide over two hours of high
-
quality video and sound comparable to that found in motion picture
theatres.

C.

they are a type of optical disc.

D.

DVD
-
ROM stands for "digital versatile disc

read only memory".

DVD
-
ROM are not erasable.




Difficulty: Hard

OLeary
-

Chapter 008 #19



29.

(p.

227)

The standard for high definition optical discs is


A.

DVD
-
RAM

B.

HD DVD

C.

Blu
-
ray

D.

HD CD

The hi def standard is Blu
-
ray.




Difficulty: Medium

OLeary
-

Chapter 008 #20



30.

(p.

227)

These discs
have a capacity of 25 to 100 gigabytes.


A.

HD DVD

B.

CD

C.

DVD

D.

Blu
-
Ray

Blu
-
ray discs have a capacity of 25 to 100 gigabytes, more than 20 times the capacity of a standard single
-
layer
DVD.




Difficulty: Hard

OLeary
-

Chapter 008 #21



31.

(p.

2222)

Which of the following is not a type of secondary storage?


A.

Memory

B.

Hard disks

C.

Optical discs

D.

Solid
-
state storage

There are three basic secondary storage options. They are hard disks, optical discs and solid
-
state storage.




Difficulty: Easy

OLeary
-

Chapter 008 #22



32.

(p.

231)

What is it called when servers on the Internet supply applications as a service, rather than a product?


A.

Digital versatile computing

B.

Service computing

C.

Cloud computing

D.

Optical computing

Cloud computing
makes use of Internet servers to provide access to applications as a service.




Difficulty: Easy

OLeary
-

Chapter 008 #23



33.

(p.

231)

Which of the following is not meant to store highly personalized or sensitive information?


A.

Online storage

B.

Flash

drive

C.

Solid State storage

D.

Hard Disk drive

Because of certain limitations, online storage is typically used as a specialized secondary storage device and not
for storing highly personalized or sensitive information.




Difficulty: Easy

OLeary
-

Chapter 008 #24



34.

(p.

234, 235)

Which of these is not a mass storage device?


A.

RAID system

B.

File server

C.

Optical disc

D.

Tape library

Mass storage devices include file servers, network attached storage, RAID systems, tape library, and
organizatio
nal cloud storage.




Difficulty: Medium

OLeary
-

Chapter 008 #25



35.

(p.

251)

One of the most dramatic changes in connectivity and communications in the past five years has been


A.

mobile telephones with wireless Internet connectivity

B.

chat rooms

C.

satellite uplinks

D.

running programs on remote computers

The single most dramatic change in connectivity and communications in the past few years has been the
widespread use of mobile telephones with wireless Internet connectivity.




Difficulty: Easy

OL
eary
-

Chapter 009 #1



36.

(p.

252, 253)

Which physical connection is the fastest?


A.

Twisted pair

B.

Coaxial cable

C.

Fiber
-
optics

D.

Microwaves

Fiber
-
optic cable is faster than the other three types of communications mediums.




Difficulty: Easy

OLeary

-

Chapter 009 #4



37.

(p.

253, 254)

Microwave communication uses high frequency:


A.

radio waves

B.

infrared

C.

satellite communications

D.

optic fibers

Microwave communication uses high frequency radio waves.




Difficulty: Medium

OLeary
-

Chapter 009
#7



38.

(p.

253)

To _____ is to send data to a satellite.


A.

uplink

B.

downlink

C.

modulate

D.

demodulate

Uplink is a term relating to sending data to a satellite.




Difficulty: Easy

OLeary
-

Chapter 009 #8



39.

(p.

253)

The GPS device in an automobile

uses which communication channel?


A.

Infrared

B.

Radio Frequency (RF)

C.

Microwave

D.

Satellite

Global positioning system (GPS) devices use Satellite information to uniquely determine the geographic location
of the device.




Difficulty: Medium

OLeary
-

Chapter 009 #9



40.

(p.

255)

A widely available technology that uses existing telephone lines to provide high
-
speed connections is
called


A.

WWAN

B.

3G/4G

C.

voiceband

D.

DSL

DSL uses existing telephone lines to provide high
-
speed connections.




Difficulty: Easy

OLeary
-

Chapter 009 #10



41.

(p.

257)

Cellular services use _____ to provide wireless connectivity to the Internet.


A.

ADSL

B.

T1 and T3 cellular networks

C.

DSL

D.

3G and 4G cellular networks

Cellular services use 3G and 4G cellular
networks to provide wireless connectivity to the Internet.




Difficulty: Easy

OLeary
-

Chapter 009 #11



42.

(p.

257)

The greatest capacity for data transmission happens in ____ devices.


A.

voiceband

B.

medium band

C.

broadband

D.

mega
-
band

Broadband is
the bandwidth used for high
-
capacity transmissions.




Difficulty: Medium

OLeary
-

Chapter 009 #13



43.

(p.

258)

A unique numeric address used by the computer to deliver e
-
mail and to locate Web sites is called the


A.

domain address

B.

protocol address

C.

IP address

D.

Web address

Every computer on the Internet has a unique numeric address called an IP address.




Difficulty: Easy

OLeary
-

Chapter 009 #14



44.

(p.

258)

____ is the process of breaking down information sent or transmitted across the
Internet into small parts
called packets.


A.

Protocol

B.

Bandwidth

C.

Identification

D.

Packetization

Before a message is sent, it is reformatted or broken down into small parts called packets.




Difficulty: Easy

OLeary
-

Chapter 009 #15



45.

(p.

258)

The essential features of this include identifying sending and receiving devices, and packeting
information for transmission across the Internet.


A.

Simple mail transfer protocol

B.

Transmission control protocol/Internet protocol

C.

File transfer
protocol

D.

hypertext transfer protocol

The standard protocol for the Internet is TCP/IP (transmission control protocol/Internet protocol) whose essential
feature involves identifying sending and receiving devices, and packeting information for transmissio
n across the
Internet.




Difficulty: Medium

OLeary
-

Chapter 009 #16



46.

(p.

260)

This device enables connectivity between two LANS or a LAN and a larger network.


A.

Network gateway

B.

Node

C.

Hub

D.

Router

A network gateway is a device that allows one

LAN to be linked to other LANs or to larger networks.




Difficulty: Easy

OLeary
-

Chapter 009 #19



47.

(p.

266)

A network in which the central computer is a host to a cluster of other computers that in turn are hosts is
called a ____ network.


A.

star

B.

bus

C.

ring

D.

hierarchical

In a hierarchical network, each device is connected to a central node. The central node is connected to two or more
subordinate nodes that in turn are connected to other subordinate nodes, and so forth.




Difficulty: Easy

OLeary
-

Chapter 009 #20



48.

(p.

268)

If the majority of the processing power is centralized in one large computer and the nodes connected to
it have little or no processing capability, it is called a ____ network.


A.

hybrid

B.

terminal

C.

peer
-
to
-
peer

D.

hierarchical

In a terminal network system, processing power is centralized in one large computer, usually a mainframe.




Difficulty: Medium

OLeary
-

Chapter 009 #21



49.

(p.

270)

Organizations use the following to allow suppliers and others limited
access to their networks.


A.

intranets

B.

extranets

C.

firewalls

D.

proxy servers

Organizations use extranets to connect themselves with outside organizations.




Difficulty: Medium

OLeary
-

Chapter 009 #22



50.

(p.

266, 267)

This type of network
topology does not use a specific physical layout.


A.

Hybrid

B.

Hierarchical

C.

Mesh

D.

Tree

The mesh network requires that each node have more than one connection to the other nodes. The resulting
pattern forms the appearance of a mesh.




Difficulty:
Easy

OLeary
-

Chapter 009 #25



51.

(p.

191, 192)

Describe alternatives to a traditional mouse.


Trackballs, also known as rollerballs, control the pointer when you rotate a ball with your thumb. Touch pads
control the pointer when you move and tap your fi
nger on the surface of the pad. Pointing sticks, in the middle of
some keyboards, control the pointer when you direct the stick with one finger.




Difficulty: Easy

OLeary
-

Chapter 007 #67



52.

(p.

197, 200)

How is voice recognition technology being used

today?


Voice
-
recognition systems allow users to operate computers and other devices as well as to create documents
using voice commands. Examples include voice
-
controlled dialing features on mobile phones, navigation on GPS
devices, and control of car au
dio systems.




Difficulty: Easy

OLeary
-

Chapter 007 #71



53.

(p.

226, 227)

Briefly discuss the differences between CD, DVD, and Blu
-
ray discs.


CDs, DVDs, and Blu
-
ray are all optical disc formats. All three come in read only, write once, and rewritable
versions. CDs have the smallest capacity (650 MB to 1 GB), followed by DVDs (4.7 GB to 17 GB), with Blu
-
ray
having the largest capacity (25 to 100 GB). Although Blu
-
ray media are the same size as CDs and DVDs, the discs
require special drives. Most Blu
-
ray

drives can also read CDs and DVDs as well.




Difficulty: Medium

OLeary
-

Chapter 008 #70



54.

(p.

252, 253)

Describe the differences between the three major physical connection mediums: twisted
-
pair cable,
coaxial cable, and fiber
-
optic cable.


Twisted
-
pair cable is made up of hundreds of copper wires that are twisted together. Both telephone lines and
Ethernet cables use twisted
-
pair. Coaxial cable is a high
-
frequency transmission cable made up of a single
solid
-
copper core. Coaxial cable has over 80 ti
mes the transmission capacity of twisted pair and is used to deliver
television signals as well as to connect computers in a network. Fiber
-
optic cable transmits data as pulses of light
through tiny tubes of glass. Fiber
-
optic cable has over 26,000 times t
he transmission capacity of twisted pair. It is
lighter and more reliable than coaxial cable.




Difficulty: Medium

OLeary
-

Chapter 009 #67



55.

(p.

255)

Explain the difference between analog and digital signals.


Analog signals are continuous electronic

waves. Telephones send and receive data in the form of analog signals.
Digital signals represent the presence or absence of an electronic pulse. Computers send and receive data in the
form of digital signals.




Difficulty: Easy

OLeary
-

Chapter 009 #69




TEST 3
Summary

Category

#

of

Questions

Difficulty:

Easy

31

Difficulty:

Hard

3

Difficulty:

Medium

21

OLeary

-

Chapter

007

18

OLeary

-

Chapter

008

19

OLeary

-

Chapter

009

18