MARK SCHEME for the June 2004 question papers 7010
Contents
1. COMPUTER STUDIES JUNE 2004 7010 1 2 a Any one method of transmission AND device method of transmission e g blue tooth radio optical satellite infra red microwave device e g 3G WAP mobile phones mobile phones cell phone remote key pad remote control keyboard infra red mouse multimedia mobile handsets notebooks GPRS general packet radio service mobiles WLAN or WiFi hotspots sited in public areas e g coffee shops railway stations airports motorway services linked printers PDA s personal digital assistants GPS 1 b Any one advantage advantage need not be linked to a e g no wires fast high speed wireless Internet access WLAN is faster than a modem or mobile WLAN for working at home one day a week teleworkers see internet content away on the move create and send multimedia messages to mobiles or e mail picture messaging send photos pictures text sound recorded greetings from mobiles to mobiles PCs instant transmission no busy signals no searching for phone jacks download e mail and file attachments on mobile watch live web cast on mobile hotspot listen to streaming video on mobile hotspot news weather sport games while on the move access information from mobile anytime send receive delete e mail while on the move wireless Inbox on mobile to contacts and calendar view business appointments while out of office on mobile send corporate e mail while out of office e2. company changes changes in hardware changes in software upgrades new versions improved operating efficiency ease of use 2 11 a Award one mark from each section Hard disk drive to hold the operating system communication and applications software ISP software for storing files information cookies on backing store RAM for data computer programs and operating instructions which are moved into it downloaded for data currently in use DVD writer Films videos pictures music multimedia data downloaded purchased Modem link dial up establish communication with the Internet Convert digital signals to analogue audio tones and vice versa Which can travel across the telephone system 4 b Award one mark for each for logging on dial up communications software ISP software for searching browser search engine 2 University of Cambridge International Examinations 2004 Page 7 Mark Scheme Syllabus Paper COMPUTER STUDIES JUNE 2004 7010 1 12 c Award one mark for an advantage on line catalogues can be viewed much larger choice of products product reviews obtainable before purchase orders placed over internet any time day or night download software purchased straight away good and services usually cheaper on the internet programs that can search for best price cheapest very fast placing an order has been placed as customer name address and credit card details are stored so no need to re
3. enter buy goods from anywhere in the world no need to go to shop save travelling time Award one mark for a disadvantage spam need a credit card to shop on line not everyone has a credit card hackers could retrieve credit card numbers and use them to buy goods security fears of giving credit card number over the internet fraud goods must be delivered can not have the goods immediately can not touch handle see the goods 2 d Award one mark for each loss of jobs as some traditional shops banks close lower profits for companies that do not get involved with e commerce decline of leisure shopping as goods are bought on line city centres becoming deserted as shops banks close down gap between rich and poor widening as richer get savings from shopping on line more people choosing to interact with computers rather than people increase in small businesses less pollution travelling 2 a ONLY general text alphabetic alphanumeric string centred bold text wrapped sans serif 1 b Allow brackets c d e B 3 B7 B 4 C7 or B3 B7 B4 C7 or B7 3 C7 2 1 mark 1 mark 2 Award one mark per stage select highlight click on D7 description of copy and paste replicate into cells D8 D9 and D10 fill down drag and drop 2 IF D10 gt E10 Profit Loss 1 A6 A10 and D6 E10 or A7 A10 and D7 E10 1 mark 1 mark or individual cells listed e g A7 A8 A9 A10 and D7 D8 E10 2 University of Camb
4. games console electronic game electronic toys rice cooker dish washer TV alarm clock radio 1 b Award one mark for each task controlled e g camera film speed position end of film distance light washing machine amount of water speed of wash temperature time fridge temperature display panel air conditioning temperature timing display panel 2 7 One mark each section F4 L90 R270 F4 L90 R270 F2 L90 R270 F2 one mark R90 L270 F2 one mark L90 R270 F2 any L R B1 B2 one mark 3 8 a One from text editor web editor HTML editor word processing desktop publishing software web publishing software web developing software authoring presentation software 1 b Two from c changing the background colour or background image on a page formatting text size font colour bold italic underline etc frames working with tables inserting graphics pictures sound clip video clip animations working with links creating buttons list box switching to a browser to check the appearance of a page use templates use auto tags 2 on a server stored on ISP web host server 1 University of Cambridge International Examinations 2004 Page 5 Mark Scheme Syllabus Paper COMPUTER STUDIES JUNE 2004 7010 9 10 a Any two from e g check digit product number item number code country of origin manufacturers number code weight price b Any two points fr
5. TER STUDIES JUNE 2004 7010 1 Generally one mark for each valid point Two examples gain two marks a byte fixed number of bits 8 bits represents a character e g a hex example or 1 11 0 1 0 0 0 1 2 b compiler program converts changes translates high level language into machine code machine language low level language object code changes each high level language instruction into machine code instructions produces independent program capable of being executed by itself all syntax errors listed converts whole program before execution in one go converts source code to object code 2 c handshaking exchanging of signals to establish communication between two devices computers e g printer and computer modem and computer 2 d technical documentation documentation to ensure that the system can be maintained updated altered developed upgraded trouble shooting correcting errors correcting faults explanation of what the program does how the system works contains file structures algorithms flow charts pseudo code program listings hierarchical charts 2 e simulation studying the behavior of a system by using a model represents real life mathematical representation e g flight simulator or others hazardous applications results can be predicted 2 University of Cambridge International Examinations 2004 Page 2 Mark Scheme Syllabus Paper
6. UNIVERSITY OF CAMBRIDGE INTERNATIONAL EXAMINATIONS GCE O Level MARK SCHEME for the June 2004 question papers 7010 COMPUTER STUDIES 7010 01 Paper 1 maximum raw mark 100 These mark schemes are published as an aid to teachers and students to indicate the requirements of the examination They show the basis on which Examiners were initially instructed to award marks They do not indicate the details of the discussions that took place at an Examiners meeting before marking began Any substantial changes to the mark scheme that arose from these discussions will be recorded in the published Report on the Examination All Examiners are instructed that alternative correct answers and unexpected approaches in candidates scripts must be given marks that fairly reflect the relevant knowledge and skills demonstrated Mark schemes must be read in conjunction with the question papers and the Report on the Examination e CIE will not enter into discussion or correspondence in connection with these mark schemes CIE is publishing the mark schemes for the June 2004 question papers for most IGCSE and GCE Advanced Level syllabuses UNIVERSITY of CAMBRIDGE W International Examinations June 2004 INTERNATIONAL GCSE MARKING SCHEME MAXIMUM MARK 100 SYLLABUS COMPONENT 7010 01 COMPUTER STUDIES Paper 1 TA UNIVERSITY of CAMBRIDGE 9 International Examinations Page 1 Mark Scheme Syllabus Paper COMPU
7. m F if F lt min then min F if F gt max then max F count count 1 until count gt 24 average sum 24 print average min max University of Cambridge International Examinations 2004 Page 11 Mark Scheme Syllabus Paper COMPUTER STUDIES JUNE 2004 7010 16 a b c d e 6 text alphanumeric string Award one mark per point less errors on input requires less storage space validation quicker to input quicker to find One mark each M1057 M1124 One mark each stage highlight select SURNAME field click on sort A to Z icon in menu or query click on sort ascending University of Cambridge International Examinations 2004 1 1 2 2 2
8. om check digit calculation is performed on the check digit remainder 0 if barcode has been read correctly weights and modulus 11 and use remainder or subtractions and addition and use answer c random direct online d Two from e g search file master file using barcode number product code and decrease number in stock increase quantity sold e Any two from e g more accurate improved stock control recording system automatic reordering automatic updating of stock file less staff wages needed sales statistics now available faster throughput itemised receipt records every transaction records staff work rates less pilfering by staff easier to identify pilfering less errors faster calculations links to EFTPOS a Any four points from specify output requirements design documents screen displays data for input storage form design storage devices file structures access design data security back up files systems flowchart etc implementation i e pilot intermediate parallel running testing strategy training hardware software programming algorithms validation user manual technical documentation entering data into system University of Cambridge International Examinations 2004 2 2 1 2 2 4 Page 6 Mark Scheme Syllabus Paper COMPUTER STUDIES JUNE 2004 7010 1 b Two points from user changes his mind new government legalisation company policy
9. ridge International Examinations 2004 Page 8 Mark Scheme Syllabus Paper COMPUTER STUDIES JUNE 2004 7010 13 a Any two from Better improved traffic flow control reduces accidents keeps delays to a minimum reduces pollution cars use less fuel b Award one mark each input from sensors from camera images processing analyse data from sensors calculate average traffic flow speed send signals to adjust change lights timing output change lights at junction change timing plan c Award one mark give uninterrupted path through the system of linked traffic lights green link wave turn all lights to red activate emergency generator alarm 2 Max 2 Max 3 Max 2 University of Cambridge International Examinations 2004 5 1 Page 9 Mark Scheme Syllabus Paper COMPUTER STUDIES JUNE 2004 7010 14 a Any one point from e g star if one computer goes down the others can still be used ring if one computer goes down the others can not be used b On diagram drawn and labelled correct network one mark Any two from award one mark each server printer modem bridge gateway c Any two from share database from one source access same information access to database by staff from any LAN machine only one database to backup d Any two from data must be accurate up to date personal data must be registered data must be
10. ter alters setting systems failure erases files erases data corrupts data data needs restoring infects other computers on network production loss financial loss 2 b Any two from do not allow outside floppy disks CD s DVD s use disk free work stations download install and use anti virus software scan hard disks regularly update the anti virus program regularly do not open file attachments from unknown sources download doubtful software from the Internet do not use files that come from unknown sources buy original software do not buy pirated software use firewalls 2 5 Any three points from e g novice can use the system right away user friendly easy to select click on icons picture to select easier to input words are replaced with icons no need to know command language to use the system remember command language selecting item using mouse is faster than entering commands avoids typing errors no need to type no need to remember commands no need know the different commands for the different software multitasking several programs open at the same time therefore easier faster to switch easier faster switching between files folders etc 3 University of Cambridge International Examinations 2004 Page 4 Mark Scheme Syllabus Paper COMPUTER STUDIES JUNE 2004 7010 1 6 a One item from e g camera microwave washing machine video recorder fridge sewing machine air conditioning
11. used for the purpose that is registered for 1 3 2 if data is to be used for another purpose the registrar must be notified subject gives consent patients must able to see the data and have it changed if it is incorrect processed fairly and lawfully kept no longer than needed kept secure not transferred to other countries without protection e Any one way of saving award one mark backups dumps of files copy of files on CD tape streamer file generations Any one from award one mark mirrored hard disk hot stand by second computer re run the old master file with the transaction file University of Cambridge International Examinations 2004 2 2 Page 10 Mark Scheme Syllabus Paper COMPUTER STUDIES JUNE 2004 7010 1 15 a Award one mark each i 33 8 1 ii 41 1 b Award one mark for each correct step in the algorithm Initialise Loop Input temperature x24 Convert to Fahrenheit Find maximum and minimum Calculate average outside loop Output maximum minimum average 5 Examples of correct answers are i sum 0 min 100 max 0 count 1 while count lt 24 do input temp F temp 1 8 32 sum sum F if F lt min then min F if F gt max then max F count count 1 endwhile average sum 24 print average min max ii sum 0 min 100 max 0 count 1 repeat input temp F temp 1 8 32 sum su
12. ven behind a firewall on mobile wireless internet connection from chat rooms for discussions with colleagues while on the move give visual demonstrations from mobile and colleagues watch back at the office Any one disadvantage e g WLAN speeds are slower than Net access at work narrow band width any one within the WLAN nodes range with an appropriate device can use your WLAN and broad band link any one who walks past your house or WLAN linked into a corporate system can access sensitive information or credit card details 3G phones not compatible with 2G phones Blue tooth has limited range blocked signal distorted signal weak signal lag health problems from microwaves 2 University of Cambridge International Examinations 2004 Page 3 Mark Scheme Syllabus Paper COMPUTER STUDIES JUNE 2004 7010 1 3 a Two PLACES from e g car factories factories chemical nuclear factories production lines warehouses deep in the ocean down mines on other planets in space road junctions 2 b Two from reduced labour costs do not need paying reduced cost of goods improve speed of production productivity high degree of accuracy precision less errors can operate where humans can not go do not take breaks holidays get tired work 24 hrs a day reduce accidents at traffic lights improve traffic flow can work in dangerous conditions 2 4 a Any two from e g memory used up slows down compu
Download Pdf Manuals
Related Search