Q1. state two places where robots are used.
Q2. state two benefits of using robots
Q3. a supermarket uses point of sale (pos) terminals at the checkout for scanning barcodes on the products. (a) state two items of data that are stored on the barcode. (b) describe how the computer system checks that the barcode has been read correctly. (c) state the type of file access that is used to get the price from the central computer. (d) explain how the system updates the file when an item has been sold.
(a) State two items of data that are stored on the barcode.
(b) Describe how the computer system checks that the barcode has been read correctly.
(c) State the type of file access that is used to get the price from the central computer.
(d) Explain how the system updates the file when an item has been sold.
Q4. give two benefits for the supermarket manager of using point of sale (pos) terminals.
Q5. state two benefits of using computerised traffic control systems.
Q6. state two benefits of using computerised traffic control systems
Q7. describe the input, processing and output from a computerised traffic-control system.
Q8. describe what the traffic control program should do when an emergency occurs.
give uninterrupted path through the system of linked traffic lights/
green link - wave
turn all lights to red
activate emergency generator
Q9. name two other input/output devices used at the pos terminal apart from keyboard and barcode reader and give a use for each device.
device: beeper/loud speaker
use: to indicate barcode correctly read/error in reading barcode
device: (LCD) screen/monitor
use: to show prices and other information about goods
device: touch screen
use: to show prices and other information about goods/to select items that need to be
device: weighing machine
use: to find weight of loose items (e.g. fruit) to enable pricing
device: (magnetic) card reader/CHIP and PIN reader
use: to read customer’s debit/credit card/enable customer to pay for goods using a
credit or debit card
use: to print receipts
Q10. describe two features you would expect to see in the expert system’s interactive user interface.
– multiple choice/yes-no answers
– easy to understand interface e.g. use of icons/drop down menus etc.
– output shown as % probabilities of fault
Q11. apart from the user interface, name three other components that make up a typical expert system.
– knowledge base
– rule(s) base
– inference engine
– explanation system
– (expert system) shel
Q12. state what is meant by computer aided design (cad). give three different applications that make use of cad. name three specialist input/output devices used in cad.
– software that can be used to design new products/amend existing products
– makes use of features such as 2D, 3D, wire frames, library of parts, links to CAM
Give three different applications that make use of CAD.
– designing cars
– designing consumer goods
– chemical/nuclear plant design
– designing electronic circuit boards
– ergonomic design
– landscape/garden design
Name three specialist input/output devices used in CAD.
– large monitor/screen with hi-res
– touch screen
– space mouse/space ball/4D device
– 3D glasses (in some applications)
– light pen
– graphics tablet
– 3D printer
– 3D scanner
Q13. (a) name two pieces of hardware needed to enable video-conferencing to take place using a standard computer system. (b) state one piece of specialist software needed to carry out video-conferencing.
– broadband modem
– use of CODEC (converts/compresses analogue data into digital data)
– echo cancellation s/ware (allows talking in real time/keeps everything in sync)
– compression s/ware for video/audio
– s/ware to access broadband/networking
Q14. state advantages and disadvantages of video conferencing
– immediate response to questions/queries
– can see each other watch body language etc.
– easier to have several participants (would be difficult using instant messaging if
several people involved)
– need for expensive equipment/high set up costs
– sometimes synchronisation problems make it difficult for delegates
– need to train people to use the new technology
– greater use of bandwidth
Q15. give one reason why use of video-conferencing has increased over the last ten years.
– faster communications now widely available
– safety reasons, e.g. increase in terrorist attacks on international flights
– reduced transportation/accommodation/hardware costs
– environmental issues, e.g. reduced carbon footprint
– increase in multinational working