Input And Output

Question 1

What is input in computing?

Answer 1

Input can either provide programs with instructions on what to do next or be the data that must be processed.

Question 2

What makes up digital images?

Answer 2

Pixels make up digital images.

Question 3

How does the number of pixels affect image quality?

Answer 3

More pixels means higher image quality.

Question 4

What is a scanner?

Answer 4

An input device that scans images into a digital format for use on a computer.

Question 5

What types of items can be scanned with a scanner?

Answer 5

• Bar codes
• Photographs
• Documents
• 3D objects

Question 6

What does DPI stand for?

Answer 6

Dots per inch.

Question 7

What is the relationship between DPI and image quality?

Answer 7

Greater DPI = more pixels = higher quality image.

Question 8

What is colour depth?

Answer 8

The number of different colours that can be represented by a pixel.

Question 9

What is the best quality colour depth available?

Answer 9

24 bit colour (about 16.7 million colours).

Question 10

List some advantages of scanners.

Answer 10

• Large documents can be scanned into a single digital file.
• Scanned documents are stored digitally.
• Scanned copies can be emailed directly.
• Old documents can be stored for future generations.
• Old family photos can be shared digitally.

Question 11

What are some disadvantages of scanners?

Answer 11

• Scanning can be slow.
• Quality depends on the original hardcopy.

Question 12

What are digital cameras?

Answer 12

Devices such as smartphone cameras, digital compact cameras, and high-end DSLR cameras.

Question 13

What is the difference between point-and-shoot and DSLR cameras?

Answer 13

• Point-and-shoot: compact, does not allow lens changes.
• DSLR: designed for professional use, allows lens changes.

Question 14

How does optical zoom differ from digital zoom?

Answer 14

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

Question 15

What does ISO rating indicate?

Answer 15

How sensitive the camera is to light.

Question 16

What is a biometric input?

Answer 16

Measures unique biological features of a person.

Question 17

What is a key advantage of biometric input?

Answer 17

Security.

Question 18

What are some ways ATMs receive input?

Answer 18

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

Question 19

List some advantages of using ATMs.

Answer 19

• Allows banking transactions anytime.
• Not limited to own bank or country.

Question 20

What are barcodes and RFID used for?

Answer 20

To automatically recognize a product or item.

Question 21

What is the purpose of output in computing?

Answer 21

• Provide user feedback
• Provide permanent copies
• Allow data transmission

Question 22

What types of output exist?

Answer 22

• Visual
• Sound
• Touch
• Other electrical signals

Question 23

What are some advantages of display devices?

Answer 23

• Immediate feedback
• Interaction with the computer
• Easily changed content

Question 24

What is resolution in display devices?

Answer 24

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

Question 25

What does contrast ratio measure?

Answer 25

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

Question 26

What is an interactive whiteboard?

Answer 26

An input & output device that displays the contents of a connected computer’s screen.

Question 27

What are some advantages of interactive whiteboards?

Answer 27

* Better interaction and participation * Annotations can be saved * Multimedia presentation

Question 28

What are laser printers known for?

Answer 28

* More reliable * Easier to maintain * Better for black and white printing

Question 29

What is the print speed measured in?

Answer 29

Pages per minute (ppm).

Question 30

What is generally cheaper to run for higher volumes of printing?

Answer 30

Laser printers ## Footnote Laser printers are often more economical for high-volume printing compared to inkjet printers.

Question 31

Which type of printer is better for high-quality photo prints?

Answer 31

Inkjet printers ## Footnote Inkjet printers are designed to deliver superior quality for photo printing.

Question 32

What can happen to ink cartridges over time?

Answer 32

They can dry out ## Footnote Ink cartridges may become unusable if left for extended periods without use.

Question 33

How is print speed measured?

Answer 33

Pages per minute (ppm) ## Footnote Print speed is typically indicated for text pages, while images may reduce speed.

Question 34

True or False: Laser printers are generally slower than inkjet printers.

Answer 34

False ## Footnote Laser printers are usually faster than inkjet printers.

Question 35

What does DPI stand for in printing resolution?

Answer 35

Dots per inch ## Footnote DPI is a measure of printing resolution, indicating the density of dots in a printed image.

Question 36

What does a higher DPI indicate?

Answer 36

Better quality printout ## Footnote Higher DPI values lead to more detailed and clearer printouts.

Question 37

What is the monthly duty cycle of a personal printer typically under?

Answer 37

5000 pages ## Footnote This indicates the robustness and expected usage of personal printers.

Question 38

What colours do cheap printers typically use to create black?

Answer 38

Cyan, Magenta, Yellow ## Footnote These three colours are combined rather than using a true black ink.

Question 39

What is duplex printing?

Answer 39

Printing on both sides of the paper automatically ## Footnote Duplex printing enhances paper usage efficiency.

Question 40

What are common connection methods for printers?

Answer 40

USB port, wireless connection, media card slots ## Footnote These methods facilitate different ways to send print jobs to the printer.

Question 41

What technology does WiFi utilize for network connections?

Answer 41

Radio waves ## Footnote WiFi provides a wireless alternative to physical cables for networking.

Question 42

What is the purpose of a driver in computing?

Answer 42

To control the device ## Footnote The driver translates instructions from the operating system into signals for the hardware.

Question 43

What devices assist visually impaired users?

Answer 43

* Braille keyboard * Braille display * Speech recognition software * Magnification devices * Large-key keyboards * Braille printers ## Footnote These devices enhance accessibility for users with visual impairments.

Question 44

What aids are available for hearing impaired users?

Answer 44

* On screen notices * Flashing screens * Vibration devices ## Footnote These devices provide visual or tactile feedback instead of sound.

Question 45

What should users lacking motor control consider using?

Answer 45

* Eye tracking devices * Head movement devices * Large key keyboards * Large trackballs * Joysticks * Foot pedal control devices * Sip and puff devices ## Footnote These assistive devices cater to various levels of motor control issues.

Question 46

What advice is given to prevent health issues related to computer use?

Answer 46

* Do not sit for hours on end * Learn keyboard shortcuts * Perform exercises for affected joints * Avoid loud headphones * Adjust monitor settings ## Footnote These practices help alleviate physical strain and discomfort.