Friday, 17 October 2014

exam questions


The traffic lights in town are controlled by a computer system.The towns council os concerned about the reliability of the system. 
Explain, using examples from the  traffic light system, what is meant by reliability and why the town needs the system to be reliable.
Reliability is when something has to be trusted e.g. if a institution installed a new computer system they would have to regularly check if its reliable otherwise it could crash and peoples work   could get lost,
 This is the same way the traffic light computer system works  but instead the affect it would have would be more severe because if people were driving and all of a sudden the traffic light computer system crashed and the traffic lights stop working people could get in to accidents to prevent this they should check the computer system regularly and do regular test on computer systems warn and people that it is likely for the computer system to crash and they should be careful and be aware of the traffic lights in case  they stop working.

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