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Question 2009
1.
UNIVERSITY OF CAMBRIDGE
INTERNATIONAL EXAMINATIONS General Certificate of Education Ordinary Level *9840095338* COMPUTER STUDIES 7010/01 Paper 1 May/June 2009 2 hours 30 minutes Candidates answer on the Question Paper. No Additional Materials are required. READ THESE INSTRUCTIONS FIRST Write your Centre number, candidate number and name on all the work you hand in. Write in dark blue or black pen. You may use a soft pencil for any diagrams, graphs or rough working. Do not use staples, paper clips, highlighters, glue or correction fluid. DO NOT WRITE IN ANY BARCODES. Answer all questions. No marks will be awarded for using brand names of software packages or hardware. At the end of the examination, fasten all your work securely together. The number of marks is given in brackets [ ] at the end of each question or part question. For Examiner's Use This document consists of 20 printed pages. IB09 06_7010_01/FP © UCLES 2009 [Turn over
2.
2 1
Explain, using examples where appropriate, the meaning of these computer terms. For Examiner's Use (a) batch processing [2] (b) data logging [2] (c) video-conferencing [2] (d) virtual reality [2] (e) virus [2] © UCLES 2009 7010/01/M/J/09
3.
3 2
Name three devices used for automatic data capture. For Examiner's Use 1 2 3 [3] 3 (a) Give three features of a typical operating system. 1 2 3 [3] (b) Some microprocessor-controlled devices do not need an operating system. (i) Give one example of such a device. [1] (ii) Give one reason why it does not need an operating system. [1] © UCLES 2009 7010/01/M/J/09 [Turn over
4.
4 4
(a) What is an interrupt? For Examiner's Use [1] (b) How can an interrupt be generated? [1] (c) An exchange of signals between two devices to allow communication to take place. What is this computer function? [1] 5 (a) What is meant by the term CAD? [2] (b) Give two examples of the use of CAD. 1 2 [2] © UCLES 2009 7010/01/M/J/09
5.
5 6
Today, electronic mail (email) is used as a means of communication. Describe three For advantages and one disadvantage of using email. Examiner's Use Advantage 1 Advantage 2 Advantage 3 Disadvantage [4] © UCLES 2009 7010/01/M/J/09 [Turn over
6.
6 7
Jon decides to buy a notebook (laptop) computer which he connects to the internet using a For WiFi (wireless) broadband connection. Describe four security issues. Examiner's Use 1 2 3 4 [4] © UCLES 2009 7010/01/M/J/09
7.
7 8
An electronics company employs five people to answer technical queries over the For telephone. The company has decided to develop a new system so customer queries are Examiner's Use answered using a website rather than by telephone. (a) Describe two ways this change would affect the five employees. 1 2 [2] (b) Describe one advantage to the company of introducing this system. [1] (c) Describe two advantages to the customer of using this system. 1 2 [2] © UCLES 2009 7010/01/M/J/09 [Turn over
8.
8 9
A company produces animation effects using computers rather than producing them For manually. Examiner's Use (a) Describe three advantages of using computers to produce animation. 1 2 3 [3] (b) Each image takes about 400 kilobytes of storage. 25 images per second are produced. How much memory would be needed to store a 30-minute animation? [2] © UCLES 2009 7010/01/M/J/09
9.
9 10 Expert systems
help in medical diagnosis. For Examiner's Use Describe the steps taken to create and test expert systems. [4] © UCLES 2009 7010/01/M/J/09 [Turn over
10.
10
11 Scientific experiments are carried out where temperatures are taken at the start and at the For end of each experiment. The volumes of gas being given off are also measured. Examiner's Use The spreadsheet shows the measurements taken. A B C D E F 1 Gas Volume/ Experiment Start End Temperature Gas Volume Temperature Number Temperature Temperature Rise Rise 2 1 15 25 10 50 5.0 3 2 18 31 13 70 5.4 4 3 20 35 15 90 6.0 5 4 18 35 17 110 6.5 6 5 21 39 18 120 6.7 7 6 16 36 20 125 6.3 8 7 19 39 20 125 6.3 9 8 20 40 20 125 6.3 10 Mean Temperature Rise = 16.6 Maximum Ratio 6.7 (a) What formula is in D2 to find the Temperature Rise for Experiment Number 1? [1] (b) What formula is in D10 to find the Mean (average) Temperature Rise for all the experiments? [1] (c) What formula is in F10 to find the Maximum Ratio? [1] (d) How could the formula in D2 be used in D3 to D9 without writing it out another seven times? [2] © UCLES 2009 7010/01/M/J/09
11.
11
(e) The following graph was produced from the spreadsheet. For Examiner's 140 Use 120 100 80 Gas Volume 60 40 20 0 10 12 14 16 18 20 22 Temperature Rise Which cells were highlighted to produce this graph? [2] (f) It was decided to link a computer to the apparatus so that all the results could be input directly and graphs produced automatically. Give two advantages of doing this. 1 2 [2] © UCLES 2009 7010/01/M/J/09 [Turn over
12.
12 12 (a) Robots
are now used to do many jobs. For Examiner's Use Describe two jobs and give a reason why robots are used. Job 1 Reason 1 Job 2 Reason 2 [4] (b) Given the present technology, describe two jobs which robots cannot do. 1 2 [2] © UCLES 2009 7010/01/M/J/09
13.
13 13 A company
has decided to sell concert tickets on the internet rather than using agencies. For Examiner's Use Once the tickets are bought, the ticket confirmation and venue information are sent to the customer and the customer prints the tickets. (a) What two features would you expect to see on the company’s website? 1 2 [2] (b) How would the ticket information be sent to the customer? [1] (c) (i) How is it possible to ensure each ticket printed is unique? [1] (ii) How is it possible to prevent unauthorised tickets being used? [1] © UCLES 2009 7010/01/M/J/09 [Turn over
14.
14 14 Study the
flowchart very carefully. For Examiner's Use START T=1 INPUT N A X=1 T=T*X X=X+1 B Is X = No N + 1? Yes OUTPUT T STOP (a) Complete the table to show what outputs you would expect for the two inputs. Input N Output T 5 1 [2] (b) Write down a possible LOOP construct for the section A to B in the flowchart using pseudocode. [2] © UCLES 2009 7010/01/M/J/09
15.
15 15 Aeroplanes use
on-board computer power to allow them to operate more efficiently and For safely. Examiner's Use (a) How is data during a flight collected and fed back to on-board computers? [2] (b) Why are computer systems thought to be safer than human pilots? [2] (c) However, pilots are still used on all flights. Why is this? [2] (d) What recent developments have led to more use of computer control in newly designed aeroplanes? [1] © UCLES 2009 7010/01/M/J/09 [Turn over
16.
16
(e) Describe how the computer would know when to make course corrections during a For flight. Examiner's Use [2] (f) At the airport, baggage check-ins use bar codes which are read by computers. (i) What information would be stored on the bar code? [1] (ii) Why do airports use the bar codes on baggage? [1] © UCLES 2009 7010/01/M/J/09
17.
17 16 The following
flowchart shows what happens when a customer uses a credit card to pay for For goods at a supermarket. Ten of the boxes are blank. Examiner's Use Using the items from the list, insert the ten missing statements using the appropriate number only. Each statement may be used once only. START Insert credit card Type in PIN STOP No Yes LIST OF STATEMENTS Yes 1 are PIN details correct? 2 are there sufficient funds? 3 card removed 4 end transaction No 5 is expiry date exceeded? 6 is card reported stolen? Yes 7 money transfer takes place 8 print itemised bill 9 read credit card details 10 two computers communicate No No Yes STOP [5] © UCLES 2009 7010/01/M/J/09 [Turn over
18.
18 17 A car
sales company uses a database. For Examiner's Use Here are three tables from the database: New Car Sales Customer Car Ordered Specification Delivery Date Reference 151319 Cancelled order None Not applicable 162154 VW Golf 21215168 December 2008 171216 BMW 320i 07981624 February 2009 Customer Details Customer Customer Name Customer Address Trade In? Reference 141516 J Smith 7 Toll Road No 151319 M Kyle 14 Coast Road No 162154 D Khan 19 Main Street Yes 165196 S Gogic 555 Trabant Road No 171216 D Marques 21 Lakki Harbour Yes Car Manufacturer Specification Car Description List of Extras Cost Price ($) 07981624 BMW 320i CNORVZ 48 500 21151198 VW Golf ABCETU 16 200 21215168 VW Golf BDEFJL 21 000 31311115 Ford Focus APRSW 17 000 (a) How many records are shown in the Customer Details table? [1] (b) (i) Which field connects the New Car Sales table with the Customer Details table? [1] (ii) Which field connects the New Car Sales table with the Car Manufacturer table? [1] © UCLES 2009 7010/01/M/J/09
19.
19
(c) Give two reasons why List of Extras in the Car Manufacturer table is stored in code For form. Examiner's Use 1 2 [2] (d) A customer goes into the showroom and the salesperson keys in 162154. What fields and information would be shown on the output screen? [2] (e) Give one advantage to the car sales company of holding customer information on a database. [1] © UCLES 2009 7010/01/M/J/09 [Turn over
20.
20 18 A small
airport handles 400 flights per day from three airlines: For Examiner's FASTAIR (code FA) Use SWIFTJET (code SJ) KNIGHTAIR (code KA) Each flight is identified by the airline code and 3 digits. For example FA 156. Write an algorithm, using pseudocode or otherwise, which monitors the 400 flights into and out of the airport each day. The following inputs, processing and outputs are all part of the monitoring process: • input flight identification • calculate number of flights per day for each of the three airlines • output the percentage of the total flights per day by each airline • any validation checks must be included [5] Permission to reproduce items where third-party owned material protected by copyright is included has been sought and cleared where possible. Every reasonable effort has been made by the publisher (UCLES) to trace copyright holders, but if any items requiring clearance have unwittingly been included, the publisher will be pleased to make amends at the earliest possible opportunity. University of Cambridge International Examinations is part of the Cambridge Assessment Group. Cambridge Assessment is the brand name of University of Cambridge Local Examinations Syndicate (UCLES), which is itself a department of the University of Cambridge. © UCLES 2009 7010/01/M/J/09
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