Mike Meyers’ CompTIA A+ Guide to 801: Managing and Troubleshooting PCs, Fourth Edition
(Exam 220-801)
Answer Key
Chapter 12
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Date:_________________________
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Instructor: ___Lori Collier_________
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■ Key Term Quiz Answers - Chapter 12: Input Devices
Use the Key Terms list to complete the sentences that follow. Not all terms will be used.
1.
Serial ports are defined by the RS-232 standard.
2.
A(n) flatbed scanner is useful when scanning a page from a book; a(n) bar code reader is
useful when scanning the price of retail items at a store.
3.
A(n) Full-Speed USB device transfers data at up to 12 Mbps on the universal serial bus.
4.
A(n) IEEE 1394b FireWire device transfers data at up to 800 Mbps.
5.
A(n) digital camera captures digital images on removable media; a(n) webcam transmits
digital images across the Internet for video communication.
6.
The amount of information a digital camera can capture is measured in megapixels.
7.
A scanner’s ability to produce color, hue, and shade is defined by its color depth.
8.
The universal asynchronous receiver transmitter (UART) contains the logic to convert
data moving between parallel and serial devices.
9.
When comparing digital cameras and their zoom capabilities, pay attention to the optical
zoom and ignore the digital zoom.
10.
For moving the mouse pointer, most people prefer a(n) optical mouse over a(n) ball
mouse because the former is much easier to keep clean.
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Mike Meyers’ CompTIA A+ Guide to 801: Managing and Troubleshooting PCs, Fourth Edition
(Exam 220-801)
Answer Key
Chapter 12
Multiple-Choice Quiz Answers
1. How many devices can a single USB host controller support?
A. 2
B. 4
C. 63
D. 127
Answer: D
2. What is the maximum USB cable length as defined by the USB 2.0 specifications?
A. 4.5 feet
B. 4.5 meters
C. 5 feet
D. 5 meters
Answer: D
3. Malfunctioning USB devices may be caused by which of the following?
A. Too many USB devices attached to the host controller
B. Improper IRQ settings for the device
C. Device plugged in upside-down
D. USB 1.1 device plugged into USB 2.0 port
Answer: A
4. What do digitizers enable people to do on a PC?
A. Capture video
B. Draw, paint, and write
C. Secure using fingerprints
D. Switch between multiple computers using the same keyboard, mouse, and monitor
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Mike Meyers’ CompTIA A+ Guide to 801: Managing and Troubleshooting PCs, Fourth Edition
(Exam 220-801)
Answer Key
Chapter 12
Answer: B
5. Which FireWire standard is properly matched with its speed?
A. IEEE 1394a, 400 Mbps
B. IEEE 1394 a, 480 Mbps
C. IEEE 1394b, 400 Mbps
D. IEEE 1394b, 480 Mbps
Answer: A
6. FireWire supports a maximum of how many devices?
A. 2
B. 4
C. 63
D. 127
Answer: C
7. What icon does Windows XP’s Device Manager display over disabled devices?
A. Yellow triangle
B. Red X
C. Blue I
D. Green D
Answer: B
8. A user reports that his mouse is jittery. What is the most likely cause?
A. His optical mouse has the wrong driver installed.
B. His wireless mouse has a dead battery.
C. His ball mouse has acquired dirt in the rollers.
D. He had one too many cups of coffee that morning.
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Mike Meyers’ CompTIA A+ Guide to 801: Managing and Troubleshooting PCs, Fourth Edition
(Exam 220-801)
Answer Key
Chapter 12
Answer: C
9. Which specifications describe a high-quality webcam that won’t bog down an Internet
connection?
A. 5 megapixels at 15 frames per second
B. 1.3 megapixels at 15 frames per second
C. 5 megapixels at 40 frames per second
D. 1.3 megapixels at 30 frames per second
Answer: D
10. Which device is a biometric device?
A. Bar code reader
B. Optical mouse
C. Retinal scanner
D. Flatbed scanner
Answer: C
11. The number that defines how many shades of gray per dot a scanner can save is referred to as
what?
A. Resolution
B. DPI
C. Color depth
D. Grayscale depth
Answer: D
12. A color depth of 16 bits can store how many color variations per dot?
A. 16
B. 32
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Mike Meyers’ CompTIA A+ Guide to 801: Managing and Troubleshooting PCs, Fourth Edition
(Exam 220-801)
Answer Key
Chapter 12
C. 512
D. 65,536
Answer: D
13. Which of the following lists the technologies in order from slowest to fastest?
A. SuperSpeed USB, Full-Speed USB, Hi-Speed USB, IEEE 1394a, IEEE 1394b
B. Full-Speed USB, IEEE 1394a, Hi-Speed USB, IEEE 1394b, SuperSpeed USB
C. Full-Speed USB, SuperSpeed USB, Hi-Speed USB, IEEE 1394a, IEEE 1394b
D. Low-Speed USB, SuperSpeed USB, IEEE 1394a, Hi-Speed USB, IEEE 1394b
Answer: B
14. In Windows 7, which Control Panel applet enables you to configure a game controller, such
as a joystick or gamepad?
A. Devices and Printers
B. Joysticks and Gamepads
C. Input Devices
D. Game controllers are only configured within a PC game.
Answer: D
15. While testing a newly installed KVM switch, you can’t display the second connected system
while tapping the SCROLL LOCK key. What is most likely the problem?
A. Incorrect KVM UPC code
B. Crossed video cable
C. Locked SCROLL LOCK key
D. Active KVM
Answer: B
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Mike Meyers’ CompTIA A+ Guide to 801: Managing and Troubleshooting PCs, Fourth Edition
(Exam 220-801)
Answer Key
Chapter 12
Essay Quiz Answers
1. A friend at the local film school needs a new keyboard and external hard drive. What advice
can you give her about the connection style for each of these devices?
Answer: For the keyboard, either PS/2 or USB is recommended as they don’t come with
FireWire interfaces. A keyboard works fine on Low-Speed USB, so no Hi-Speed USB
considerations are necessary. As for the external hard drive, a Hi-Speed USB connection
would be fine for normal usage, but your friend is a film student and may be involved with
transferring large digital video files, so a SuperSpeed USB hard drive would be better. She
would have to make sure her computer supports the connection, and if it doesn’t, she should
purchase and install an expansion card to provide the ports.
2. Dylan is excited because he just got a new USB digital camera. He tried to install it on his
laptop, but the computer doesn’t recognize it. He’s called you for help. What will you tell
him?
Answer: First, Dylan needs to make sure that the USB ports are enabled in the CMOS setup.
Then he needs to install the driver that came with the camera before he attaches the camera to
the USB port.
3. Ken asks for your help because he is always forgetting his Windows password. What can you
recommend to make logons easier for him?
Answer: As Ken is not capable of remembering his password, he may benefit from an
alternate authentication method such as biometric authentication. He should invest in a USB
fingerprint scannerand make sure to get one that comes with the appropriate software to
log on to Windows upon successful recognition.
4. Sandra’s always trying new video games. She usually plays role-playing games like World of
Warcraft, but a friend bought her a new flight simulator. She wants to get the most out of the
experience. What device should she get to enhance her experience? How should she set it up?
Answer: For flight simulators, a joystick will provide the most control, though a gamepad
will work too. To configure the game controller, open the Game Controllers applet
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Mike Meyers’ CompTIA A+ Guide to 801: Managing and Troubleshooting PCs, Fourth Edition
(Exam 220-801)
Answer Key
Chapter 12
(Windows XP/Vista) or Devices and Printers (Windows 7). Open the properties for the
device, and then configure and calibrate whatever settings are available for that controller.
5. The new head of sales is frustrated because when she tries to use her keyboard, letters
continue to print across the screen even if she quickly taps a key, resulting in messages that
llllooooooookkkk lllliiiikkkkeeee tttthhhhiiiissss. How can you walk her through fixing this
problem over the phone?
Answer: If letters are repeating too quickly, her keyboard repeat delay is set too short. She
should navigate to the Control Panel and double-click the Keyboard applet. On the Speed tab,
she should drag the Repeat delay slider to the left and then test her setting by typing in the
test area before clicking OK.
Cross Check Answer
Flash Media
A thumb drive is a generic term for a flash memory device that plugs into a USB port on a PC,
whereas an SD card is a specific flash memory device that is intended for use inside devices such
as digital cameras, cell phones, and MP3 players. It is possible to make a bootable flash-media
drive.
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