Input And Output

Question 1

What makes up digital images?

Answer 1

Pixels

Pixels are the small dots you see when zooming in on an image.

Question 2

What does a higher number of pixels indicate?

Answer 2

Higher image quality

Question 3

What is the function of a scanner?

Answer 3

Scans images into a digital format for use on a computer

Question 4

What types of items can be scanned by a scanner?

Answer 4

• Bar codes
• Photographs
• Documents
• 3D objects

Question 5

What does DPI stand for in scanning?

Answer 5

Dots per inch

Question 6

What is the relationship between DPI and image quality?

Answer 6

Greater DPI = more pixels = higher quality image

Question 7

What is the best quality colour depth available?

Answer 7

24 bit colour (about 16.7 million colours)

Question 8

Name one advantage of scanners.

Answer 8

Scanned documents are stored digitally & don’t take up physical space

Question 9

What is a disadvantage of scanners?

Answer 9

Scanning can be slow

Question 10

What is a point-and-shoot camera?

Answer 10

A compact camera designed for quick use and limited technical expertise

Question 11

What is a DSLR camera designed for?

Answer 11

Professional use where the lens needs to be changed

Question 12

What is the advantage of a larger sensor in a camera?

Answer 12

Better quality images, even with the same number of megapixels

Question 13

What is the difference between optical and digital zoom?

Answer 13

Optical zoom uses the camera lens; digital zoom enlarges the image but reduces quality

Question 14

What does ISO rating indicate?

Answer 14

How sensitive your camera is to light

Question 15

What is the main advantage of biometric input?

Answer 15

Security

Question 16

Name one disadvantage of biometric input.

Answer 16

Expensive to implement, maintain and use

Question 17

How do ATMs receive input?

Answer 17

• Card reader slot
• Numeric keypad & menu buttons
• Modem/Network connection
• Touchscreen
• Money counter sensor
• Money deposit slot

Question 18

What is one advantage of using ATMs?

Answer 18

Allows for banking transactions at any time of day or night

Question 19

What is a disadvantage of using ATMs?

Answer 19

It can be dangerous to use an ATM

Question 20

What technology do Point of Sale systems use to recognize products?

Answer 20

Barcodes & RFID tags

Question 21

What is an advantage of using barcodes in POS systems?

Answer 21

Much faster than typing in prices on a keyboard

Question 22

What is a touch screen?

Answer 22

A combination of an LCD and a thin ‘touch sensing’ film

Question 23

What is one advantage of touch screens?

Answer 23

Intuitive to use – very little training needed

Question 24

What is a disadvantage of touch screens?

Answer 24

Typing on an on-screen keyboard is not as fast or easy as a real keyboard

Question 25

What are data collection devices used for?

Answer 25

Capturing data using sensors, switches, cameras, microphones, etc.

Question 26

What is an advantage of data collection devices?

Answer 26

Data is captured automatically using sensors

Question 27

What is one limitation of data collection devices?

Answer 27

Sensors can fail without the problem being detected

Question 28

What types of input do smartphones and tablets have?

Answer 28

* Touch screen * Physical buttons * Camera/video camera * Accelerometer/gyroscope * Microphone

Question 29

What is the purpose of output in computing devices?

Answer 29

* Provide user feedback * Provide permanent copies of results * Allow data transmission between devices

Question 30

What are the types of output?

Answer 30

* Visual * Sound * Touch * Other

Question 31

What is the advantage of display devices?

Answer 31

Provide immediate feedback to the user

Question 32

What is a disadvantage of display devices?

Answer 32

Output is not permanent

Question 33

What does resolution refer to in display devices?

Answer 33

The number of horizontal and vertical pixels that a screen can display

Question 34

What is the contrast ratio?

Answer 34

The difference between the darkest black and the whitest white the display can produce

Question 35

What is aspect ratio?

Answer 35

Relationship between width and height of the screen

Question 36

What does response time measure?

Answer 36

How quickly the monitor updates its pixels

Question 37

What do lumens describe in projectors?

Answer 37

The brightness of the image projected

Question 38

What connection types do monitors typically use?

Answer 38

* VGA * DVI * HDMI * DisplayPort

Question 39

What is an interactive whiteboard?

Answer 39

Input & output device that displays contents of a connected computer’s screen

Question 40

What is one advantage of interactive whiteboards?

Answer 40

Better interaction and participation to enhance the process of teaching and learning

Question 41

What is a disadvantage of interactive whiteboards?

Answer 41

Only one person can use it at a time

Question 42

What are the two main types of printers?

Answer 42

* Laser Printers * Inkjet Printers

Question 43

What is the print speed measured in?

Answer 43

Pages per minute (ppm)

Question 44

What does monthly duty cycle indicate?

Answer 44

The maximum number of pages that can be printed in a month without breaking down

Question 45

How do colour printers create black ink?

Answer 45

Combine Cyan, Magenta, and Yellow inks

Question 46

What is one common connection type for printers?

Answer 46

USB port

Question 47

What does Plug and Play refer to?

Answer 47

Method of rules for how a device identifies itself to the computer when connected

Question 48

What technology does WiFi use to connect to networks?

Answer 48

Radio waves ## Footnote WiFi eliminates the need for physical cables.

Question 49

List three examples of wireless technology applications.

Answer 49

* Wireless printing * Wireless sound (Bluetooth headsets, speakers, subwoofers) * Wireless video & images

Question 50

What is the purpose of Plug and Play technology?

Answer 50

To set rules for how a device identifies itself to a computer upon connection ## Footnote It simplifies the process of adding new hardware.

Question 51

What happens if a computer does not have the software for a newly connected device?

Answer 51

It will ask you to install the required software ## Footnote This usually occurs only the first time the device is connected.

Question 52

What is a driver?

Answer 52

The software that controls a device ## Footnote Drivers translate operating system instructions into signals for hardware.

Question 53

What is the function of a driver in relation to an operating system?

Answer 53

It translates instructions from the OS into electrical signals for the device ## Footnote For example, printing a document.

Question 54

Name two devices designed for visually impaired users.

Answer 54

* Braille keyboard * Screen narrator/text-to-speech software

Question 55

What type of device can provide notifications for hearing impaired users?

Answer 55

On-screen notices or flashing screens instead of sound ## Footnote These devices help convey information visually.

Question 56

Which devices assist individuals lacking motor control?

Answer 56

* Eye tracking devices * Head movement devices * Large key keyboards * Large trackballs * Joysticks * Foot pedal control devices * Sip and puff devices

Question 57

What is one recommendation for maintaining health while using input and output devices?

Answer 57

Do not sit for hours on end ## Footnote Frequent breaks and movement can prevent strain.

Question 58

True or False: Using headphones to block out surrounding sound can be damaging to your hearing.

Answer 58

True ## Footnote It often leads to increased volume levels that can harm hearing.

Question 59

What should you do to avoid eye strain when using a monitor?

Answer 59

Change the monitor settings and position it to avoid glaring reflections ## Footnote Proper setup can significantly reduce eye discomfort.