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Cambridge University Press 2011

Range and scope ofcomputer applications

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Revision questions: 7 Range & scope of applications 1Cambridge IGCSE Computer Studies

1 Most schools now have computer networks or their administrative staff.

a Name two jobs that could use the network.

b Name two sofware applications that could be used. (HIN: Chapter 1 might be useul

or this.)

2 Microprocessors are sometimes used in hospitals to monitor a patient on a lie-support machine.Give one advantage o using a microprocessor rather than a doctor or nurse.

3 Te temperature and soil moisture o a greenhouse must be controlled and must remain withina certain range.Te temperature must be kept between 5C and 30C and the soil must not gettoo dry.Describe in detail how a computer system could be used to monitor and control bothtemperature and soil moisture in the greenhouse.In your answer state what items o hardwareor equipment might be needed.

4 A large town uses computerised traffi c lights, controlled by a central computer.

a Give two types o input used by the system.

b Give two benets o the system.

5 Robots are now used in many different situations.

a Name two different sensors that can be tted to robots.

b Describe how each o these sensors could be used.

c List three jobs done by robots.

d Give three reasons or using robots instead o people.

6 Te Internet is widely used within a school.When pupils log on, they get thechoice otheollowing Internet acilities allowed by the school.

instant messaging search engines avourites social networksa Select two o the above acilities.Dene each acility and describe how each could be used

in school.

b Give two problems or dangers that might occur when pupils have unsupervised access to

the Internet.Explain how they could be prevented.c In order to protect pupils which o the above acilities should be withdrawn?

7 A spreadsheet could be used to produce a simulation model.

a Give a denition oa simulation model and state one example o where a simulation modelcould be used.

b Give an advantage o using a simulation model.

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Cambridge University Press 2011 Revision questions: 7 Range & scope of applications 2Cambridge IGCSE Computer Studies

8 A number o schools are considering using video conerencing.

a What is meant by video conerencing?

b Te schools already have computers. Give two additional pieces o hardware needed to

enable video conerencing.

c Give two advantages to the schools o using video conerencing.

9 a Name ve microprocessor-controlled devices in an average home.b Describe any social effects that these may have had.