Q1 How many different things did you count? What were they? In what ways might computers be used to control different things in the super market?
A1 Icounted 6 and they weremicrowave, stellite navigation system, credit card, automatic door, freezer and conveyer belt
Q2Why is it useful to use computers rather than people to control things? What problems might there be if any of the computer systems fail in the supermarket?
A2 It is useful to use computers rather than people because computers do the programmed things quick and well. There will be problem like the door doesn't open, products melt.
Q3 Describe the inputs and outputs for the other devices that we have talked so far, How do the super market doors and car park varriers know when to open? Identify other control systems that work automaticallu in this way.
A3 Input alarm clock to ring at the time that the user set. Supermarket doors know it has to open when it sense the thing infront of it. Car park barriers know it has to open when the card is pulled out. Television will turn on when the ray touch the spot.
Q4 What would happen if the instructions were wrong? These instructions assume that the car is in the right place. Wht would happen if the car were not there? How could they stop this happening?
A4 If the intructions were wrong, the machine will move strange. The machine will just break the glass. They could stop this from happening by set machine to only work if it sense a car.
