3.6 – Explain the purposes and uses of various peripheral types

Question 1

What does a KVM do?
❍ A. Connects a computer to Bluetooth-enabled devices
❍ B. Allows multiple users to share a single computer
❍ C. Networks multiple computers together
❍ D. Connects multiple computers to save resources

Answer 1

D. A KVM connects multiple computers to a single keyboard, mouse, and monitor.
This way, fewer resources in the way of peripherals (input/output devices) are necessary to use the computers.

Question 2

Which of the following are considered both input and output devices?
❍ A. Keyboard, mouse, touchpad
❍ B. Smart card reader, motion sensor, biometric device
❍ C. Printer, speakers
❍ D. Smart TV, touchscreen, KVM, headsets

Answer 2

D. Smart TVs, touchscreens, KVMs, and headsets are considered both input and
output devices. Keyboards, mice, touchpads, smart card readers, motion sensors,
and biometric devices are considered input devices. Printers and speakers are
considered output devices.

Question 3

Which of the following devices can be used to perform combination shortcuts?
 ❍ A. Keyboard
 ❍ B. Mouse
 ❍ C. Printer
 ❍ D. KVM

Answer 3

A. A keyboard can be used to perform combination shortcuts. An example of a
shortcut key is Ctrl+P, which initiates a print job within an application. While a
KVM will have a keyboard connected to it, it’s at the keyboard that you perform
the shortcut operation.

Question 4

Which of the following incorporate the concept of resolution? (Select all that
apply.)
 ❍ A. Keyboard
 ❍ B. Mouse
 ❍ C. Printer
 ❍ D. Signature reader
 ❍ E. LED display
 ❍ F. Speakers

Answer 4

B, C, and E. The mouse, printer, and LED display all deal with resolution. A
mouse’s sensitivity is rated in DPI; for example, 800 DPI is a low resolution for
mice. A printer will commonly print out documents at the resolution 600 DPI (more
on that in Chapter 15). A monitor will commonly have a resolution of 1920 × 1080
(or greater!)

Question 5

Which of the following terms describes how the light output from a video projector
is measured?
 ❍ A. IPS
 ❍ B. CCFL
 ❍ C. Lumens
 ❍ D. OLED

Answer 5

C. A video projector’s light output is measured in lumens. In-plane switching (IPS)
technology allows for a wider viewing angle. Some LCDs use a cold cathode
fluorescent lamp (CCFL) as the lighting source instead of LEDs. OLED stands for
organic light-emitting diode—that’s the lighting material used in the display