• Input

Question 1

What do input devices do?

Answer 1

Input devices transfer data from the source in the outside world to the computer.

Question 2

What are some examples of input devices?

Answer 2

• Keyboards
• Microphones
• Touch Screens

Question 3

What are the two types of barcode system?

Answer 3

• Universal Product Code Version ‘’ A ‘’ / UPC-A

* Code 128

Question 4

How does Code 128 differ to UPC-A?

Answer 4

• Code 128 can represent letters and numbers

* UPC-A can only represent numeric digits

Question 5

Where might Code 128 be used?

Answer 5

Transport and shipment tracking

Question 6

Where might UPC-A be used?

Answer 6

Retail and Warehousing

Question 7

What are QR codes?

Answer 7

2-D barcodes that can be read by smartphones or tablets

Question 8

What can QR codes contain?

Answer 8

• Website Links

* Information

Question 9

What is the purpose of 2-D scanners?

Answer 9

• Convert a hard copy or paper copy document or photograph into a computer readable format.

Question 10

How may 2-D scanners be beneficial?

Answer 10

Emailing hand drawn images or text to someone else

Question 11

What do sensors do?

Answer 11

Sensors collect data in an analogue form and require conversion to digital data to be processed.

Question 12

What is the definition of a sensor?

Answer 12

A hardware device that can take measurement of physical properties, such as temperature or pressure, from real world surroundings. These measurements are usually a representation of the actual property being measured.

Question 13

What does analogue mean?

Answer 13

Data has no discrete value and the data changes smoothly, rather than in exact jumps.

Question 14

What are some examples of monitoring?

Answer 14

• Computers or microprocessors will make no changes to the actual process, it will simply report values.

Question 15

What does it mean for something to be in control?

Answer 15

• Output from the computer or microprocessor can alter how the process is operating
• It can change the value of the next input received
• the output from the computer or micro processor can affect the next input it receives.

Question 16

What are some examples of detection systems?

Answer 16

• Pressure sensors monitor an intruder stepping on the floor next to the windows.
• Acoustic sensors pick up sound of breaking glass or footsteps on the floor
• Infrared sensors pick up movement in the rooms, and changes in heat.

Question 17

How does sensor feedback work?

Answer 17

• Sensors constant take readings for monitoring
• If any of the sensor readings exceed the pre-set values, then the microprocessor sends a signal to warn the user.
• Each sensor will feed into a n interface box so that the microprocessor can pin point exactly which sensor sent the high value
• Monitoring continues until the user keys in a PIN to de active the system