Input Output Devices

Question 1

I/O

Answer 1

Input Output

Question 2

Pointing devices

Answer 2

Eg mouse, trackpad, trackerball

Question 3

Touchscreen

Answer 3

Eg tablets, smart watches, smartphones, interactive whiteboards etc

Question 4

UPC-A

Answer 4

Type of Barcode (Universal Product Code Version A) binary code (light=1 dark=0) corresponds to a numerical code which corresponds to a product (retail/warehouse)

Question 5

Code 128

Answer 5

Type of barcode using letters and numbers used in shipment/transport

Question 6

QR code

Answer 6

Quick response code. 2D barcode read by mobile phones that poses a high security risk as anyone can make them and it’s impossible to know if it’s genuine til it’s scanned. Used in restaurants, tickets, real estate boards, business cards etc

Question 7

2D scanner

Answer 7

Converts hard copies (paper documents) into computer readable formats

Question 8

3D face recognition

Answer 8

Specialist software to compare proportions of face/fingerprint/retina with stored info

Question 9

3D MRI

Answer 9

Magnetic Resonance Imagery, used within hospitals

Question 10

Sensors

Answer 10

Hardware to take measurements of physical properties from real world surroundings

Question 11

Types of sensor

Answer 11

Gas, infrared, light, pressure, temperature, pH, Magnetic field, Humidity, Sound

Question 12

Monitoring

Answer 12

The computer/microprocessor reports values without making changes

Question 13

Control

Answer 13

Output from computer/microprocessor alters how processor operates - it can affect the value of the next input received

Question 14

ADC

Answer 14

Analogue Digital Converter - converts analogue data into digital signals and vice versa

Question 15

Inkjet printer

Answer 15

Uses ink cartridges (up to 10 colours in professional models) and can vary in expense

Question 16

Laser printer

Answer 16

Use dry powdered ink called toner and are used by businesses as they’re fast and reliable with excellent print quality

Question 17

Dot matrix printer

Answer 17

AKA impact printer. Uses a ribbon of ink like a typewriter and can be used in damp dirty conditions but is noisy, expensive and has bad quality inks

Question 18

3D printer

Answer 18

Prints complicated or simple useable 3D objects using plastic filament, powdered ceramic, metal or resin powder or paper. Used to make prosthetics, prototypes, car parts etc

Question 19

RFID

Answer 19

Radio Frequency Identification. Used in mobile phones, bank cards and tags for security, identification, banking, tracking etc

Question 20

Receiver

Answer 20

Part of RFID that emits radio frequency energy

Question 21

Transponder

Answer 21

Part of RFID in bank cards, phones etc that gets energised by the radio frequency of the receiver and sends data to the receiver

Question 22

Passive transponder

Answer 22

A transponder with no power source that relies on the waves of the receiver for energy

Question 23

Active transponder

Answer 23

Transponder with a large battery that can broadcast a signal to receivers up to 300m away. Used in shipping, warehouses etc

Question 24

Actuators

Answer 24

Motors used in conjunction with sensors to create a mechanism eg automatic door, moving fan, robot facr

Question 25

Loudspeakers & headphones

Answer 25

Digital data sent to ADC where it is converted into an analogue signal which is boosted by an amplifier and sent to the speaker

Question 26

LCD

Answer 26

Liquid Crystal Display. A screen containing groups of red green and blue diodes to form each pixel

Question 27

Advantages of using LEDs in LCDs rather than CCFL technology

Answer 27

Immediate max brightness, sharper, more vivid/realistic colours, brighter, higher definition, thinner screen, more reliable, consumer very little power, lower cost

Question 28

OLED

Answer 28

Organic LED. Made of plastic and doesn’t need backlighting as it produces its own light. Can be curved, consumes very little power and has even brighter light

Question 29

Multimedia light projector

Answer 29

Compact, full resolution light projector for projecting images, video, audio etc. Inputs data from CD or computer

Question 30

Multimedia projector

Answer 30

Takes a video signal, converts it to a viewable form and projects it onto screen. Used for slideshows, TV, DVDs, video games and more