RevCh6

RevCh6

By Sumeera Wajid

​Students should revise and understand:
Communication media
Computer modelling
Computers in the retail industry
School management systems
Banking applications
Expert systems
Satellite systems

​Objectives:

Multiple Choice

Sensor is an output device

• True

• False

Open Ended

A customer is planning to take a flight from London Heathrow Airport. The representative types in a code LHR for London Heathrow Airport. One of the reasons for using a code for the airport is to improve data accuracy

Describe the processing and outputs involved in making the booking.

​Display flights available Booking database is searched for the customer reference number Matching record is retrieved Details of the customer are displayed on the screen Booking database is searched for matching departure airport Booking database is searched for matching destination airport If flight correct, date/time found Search if seats/tickets/flight available If unavailable error message output Outputs the price If seats available, flags seat as booked If not booked then flag removed Reduces number of seats/tickets available by number booked E-ticket/ticket details are output E-ticket/ticket details sent to customer Receipt is printed//Verification email sent

Open Ended

•A chemistry student wants to measure how quickly a liquid cools after it has boiled. She will use a sensor connected to a computer to do this.

•Describe how the computer would process the data into a form the student could use to analyse the results.

​•The sensor feeds back data to computer

•Data is converted from Analogue to Digital

•Readings are stored in a spreadsheet/software package

•Graphs are automatically produced by computer, and plotted against time

•Calculations performed on spreadsheet to show rate of cooling

•Graphs examined to see general overview of rate of cooling

Open Ended

•A customer wishes to check the balance of their bank account and inserts their card into the ATM.

•Describe the computer processing which takes place at the ATM.

​•The bank account details are read from the chip

•The (ATM) checks to see if the card is valid

•The customer is asked to type in their PIN

•The typed PIN number is compared with the bank database

•If they are the same the transaction proceeds and asks for which service he requires

•If three failed attempts occur, transaction rejected and card withheld

•Customer is asked if they want a printed balance/onscreen balance

•If yes, signal sent to print balance/message sent to screen giving balance

•The customer is asked if further services are required

Open Ended

•A school library uses a computer system where there is a book file and a borrower file. Each student has a unique membership number and each book has a unique accession number.

•The accession number is the number given to a book when it is first bought by the library.

•When a book is borrowed, the student has their thumbprint read by a special input device.

•Describe the computer processing involved when a book is returned. There is no need for the borrower to have their thumbprint read during this process.

​•Accession number is compared with those on book file

•Matching record is found

•Record is flagged as returned/changed to returned

•The accession number is deleted against membership number in the borrower file/borrower is recorded as having borrowed one less book

•Computer calculates if book has been returned overdue

Open Ended

A school has introduced a system so that parents of its students can access data about their children.

Give three reasons why the school has introduced this system.

​•To save printing costs of reports

•To ensure test results, etc. are received by parents

•To allow immediate feedback to parents after tests/exams

•To keep parents up to date with child’s progress/targets

•

Open Ended

Give three reasons why it would not be sensible to use batch processing in an online theatre booking system.

​•It might lead to double booking

•Customer would not be sure booking has been successful

•Would take a long time to receive confirmation/ticket

•Processing would take a long time which would cost company money

Open Ended

Most supermarkets now operate online shopping.

Discuss the advantages and disadvantages to supermarkets of this development.

​•Initial cost of hardware/software is expensive

•Fewer staff needed – less spent on wages

•Fewer shops needed – less spent on rates/rent/utilities

•Potentially larger customer base

•Need to retrain staff

•Less customer loyalty/loss of customers/more difficult to sell other services/products due to lack

•of personal touch

•Costs of system maintenance

•Greater costs due to more delivery staff/vans

Open Ended

Financial models and scientific experiments are examples of different types of modelling applications.

 

Give three other examples of types of modelling.

 

​•Simulations

•Mathematical models

•Civil engineering models

•Flight/pilot simulation/training

•Design of fairground rides

•Traffic control

•Building fire simulation

•Weather forecast models

Population modelling

Open Ended

Identify four uses of online booking systems.

​•Air flight tickets

•Theatre tickets

•Holiday booking

•Cinema tickets

•Rail tickets

•Hotel room booking

•Restaurant table/seat booking

•Football match booking

•Concert/performance booking

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