5.0

1)      How many different things did you count? What were they? In what ways might computers be used to control different things in the supermarket?

A:  There are 6 different electrical thing in Mike’s day, and there are AC, car park barrier, freezer, parking sensors, public lights, automatic opening door.;

2)      Why is it useful to use computers rather than people to control things? What problems might there be if any of the computer system fall in the supermarket?

A: Because when computer is calculating is faster than when people are calculating. If the computer system is fall in the supermarket than it will cause 10 to 15 minutes to work. 

3)      Describe the inputs and outputs for the other devices that we have talked about so far. How do the super market doors and car park barriers know when to open? Identity other control systems that work automatically in this way.

A: The control system will detect things in a certain area. Therefore the door will open if things are in that area.

4)      What would happen if the instructions were wrong? These instructions assume that the car is in the right place. What would happen if the car were not there? How could they stop this happening?

A: The car will not work properly, because some parts of the car went wrong. So it will cause the car not to work properly. E.G. The brake cannot stop the car from moving, etc.