CS(SG)07GMS. COMPUTING STUDIES STANDARD GRADE General Level NATIONAL QUALIFICATIONS. Marking Guidelines Perfect Papers All rights reserved.

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1 G NATIONAL QUALIFICATIONS Marking Guidelines COMPUTING STUDIES STANDARD GRADE General Level This paper must be withdrawn from candidates any follow-up discussion of marks/grades awarded. This is to ensure the ʻsight unseenʼ status of this paper is maintained for your centre and other schools/colleges during the diet of prelim examinations in 2006/2007. Submission of this test paper for Appeals purposes will assume that these conditions have been applied Perfect Papers All rights reserved. Page 1

2 Standard Grade Computing Studies - General Level Marking Instructions KU - Knowledge and understanding PS - Problem solving Structure of paper on paper The layout of this paper is modelled on the format of previous General level papers produced by SQA. There are six questions in total. The sixth question is selected by the centre from either Commercial Data or Automated according to which topic has been taught in preparation for the estimate examination. The questions draw on the following areas: Question 1: Question 2: Question 3: Question 4: Question 5: Question 6: General Purpose and Computer General Purpose and Communications and Networks Computer General Purpose and Communications and Networks General Purpose and Communications and Networks Commercial Data OR Question 6: Industrial The paper is marked out of 36 for KU and 36 for PS. The following thresholds are suggested. Knowledge and Understanding Problem Solving Mark Grade Mark Grade < 18 7 < 18 7 Page 2

3 1 This question deals with content from General Purpose and Computer A PE department is doing time trials for the 100m. Part of the spreadsheet is shown below. (See exam paper) PS (a) Cell D2 contains the average trial time for John Brown. Fill in the space below with the function and cell reference for this average calculation. = KU (b) The formula is replicated in column D. Explain what is meant by the term replicated? KU (c) After the trial times were entered the teacher wanted to ensure that they could not be deleted or altered by mistake. What is the name given to the feature that would prevent this? PS (d) All the times shown should have 2 decimal places. Explain clearly how this could be done using a package with which you are familiar. PS (e) In column E the teacher wants to show their best time over the two trials. Fill in the space below with the function and cell reference in the appropriate place for cell E4. =AVERAGE (B2:C2) 1 mark for Average 1 mark for correct cell references The formula is copied into the cells - 1 mark Cell Protection - 1 mark Highlight B2 to C6 or Highlight all the times - 1 mark Correct explanation for changing the cells to 2 Decimal Places - 1 mark = MIN (B4:C4) 1 mark for MIN 1 mark for correct cell references = ( : ) PS (f) (i) The teacher wants to take a backup copy of the spreadsheet. Suggest a suitable backing storage medium. USB flash drive pen drive rewritable CD floppy disc Any suitable answer - 1 mark PS (f) (ii) Give a reason for your answer. Fast Access Editable Any bullet point - 1 mark PS (g) The teacher wants a printout of the names and the times for trial 1 only. Explain how this would be done. Highlight column A and B or Highlight cells A1 or A2 to B6 Click on File/Print/Selection (or correct explanation for known package) 1 mark for each bullet point 2 marks Page 3

4 2 This question deals with content from General Purpose and Communications and Networks Below is part of a delivery schedule that a delivery courier can access using their PC. The courier uses this to plan his delivery route for the day. (See exam paper) PS (a) Three different field types have been used in this database. One is text. Name the other two. Date Numeric PS (b) The courier would like to find all the morning deliveries in postcode area AB11. Choose the correct words from the list below to complete the following paragraph. (see exam paper) on the field for on the field AB11 Search on the field Time of Delivery for am AND on the field Delivery Address contains AB11. 1 mark for each correct entry Max 6 marks PS (c) The courier would prefer to have the information displayed in order of postcode. How would the record format need to be altered to allow this? PS (d) Head office can alter any of the information but the courier cannot change anything. Explain how this is possible. KU (e) The courier currently uses a dial up connection to find the information but finds that it is very slow. Suggest a more suitable type of connection. KU (f) (i) An individual has been accused of hacking. Explain what is meant by the term hacking. KU (ii) Do you always have a right to see personal data held about you? Explain your answer. Have a separate field for postcode 1 mark Different passwords Giving different levels of access Broadband - 1 mark Illegal access to someone s data/computer system - 1 mark No If it is a matter of National Security If it will prevent solving of a crime Any suitable answer 1 mark for each bullet point Max 1 mark Page 4

5 3 This question deals with content from Computer (a) High level languages are used to write programs. A translator program is needed to convert it into machine code. KU (i) Explain why a high level language must be converted into machine code. KU (ii) Why would a programmer choose to use a high level language rather than machine code to write a program? So that the computer can understand it. 1 mark It is English like, therefore easier for a human to understand It is easier to correct mistakes Any bullet point 1 mark - Max 1 mark KU (b) There are two types of files data files and program files. Explain what is meant by a data file and a program file. Data file is a file created or used within a program 1 mark Program file is a set of instructions that the computer follows 1 mark KU (c) Complete the sentences below using the correct words from the following list, stating how whole numbers and text are stored in memory. 1. binary digits 1 mark 2. ASCII - 1 mark storage locations, decimal, ASCII, binary digits, integers 1. Whole numbers are stored as 2. Text is stored using KU (d) When deciding which type of printer to buy a number of factors need to be taken into account. One of these factors is the cost of the printer. State two other factors that should be considered. KU (e) (i) State the difference between a CD- Recordable and a CD-Rewritable disk. PS (ii) State a situation where a CD- Recordable would be used. PS (iii) State a situation where a CD- Rewritable would be used. speed resolution running cost eg. Price of toner etc. 1 mark for each correct bullet point - Max 2 marks CD-Recordable can only store once 1 mark CD-Rewritable can change information and restore the file 1 mark Any suitable use 1 mark Any suitable use 1 mark Page 5

6 4 This question deals with content from General Purpose and Communications and Networks A company specialises in organising weddings. KU (a) They have information on a number of hotels stored as standard paragraphs. What is meant by a standard paragraph? a piece of text stored as a separate file which can be re-used (b) A document is to be sent to one set of clients confirming all the details for their big day. Unfortunately the name of the hotel Pitmedden Hotel has been typed as Pitmoodle Hotel several times in the document. It is possible to change the name throughout the document in one operation. PS (i) Name the feature which would enable this to be done. PS (ii) Describe how this feature could be used in this example. search and replace 1 mark Search for the word Pitmidden And replace with the word Pitmedden (c) The document is checked before being sent to the clients using a spelling checker. KU (i) Explain how a spell checker can be used to find and correct errors. Spell Checker has a dictionary containing all known words Each word in the document is checked against the dictionary It highlights any word it cannot find a match for 1 mark for each bullet point Max 3 marks PS (ii) State one example of a word that would be highlighted by a spelling checker even though it is spelt correctly. A name of a person/hotel or any valid response - 1 mark Page 6

7 4 This question deals with content from General Purpose and Communications and Networks PS (d) The first word in the sentence below has been typed as their and should have been there. This has been shown as an error on the document. Their will be champagne served on arrival Which feature of the word processing package has detected this error? KU (e) A table has been used to create a leaflet showing information on the different cars available and showing a picture of each car alongside it. State one advantage of using a table to display the information. grammar check 1 mark Useful for displaying/keeping information together or any other valid response 1 mark (f) The company often sends required information to clients using electronic mail. KU (i) State two advantages of using electronic mail rather than the traditional postal service. doesn t get lost in the post arrives quicker any other valid response KU (ii) State one disadvantage of using electronic-mail. Viruses can be attached/sent Recipient requires address/account etc. Any other valid response 1 mark for each bullet point Max 1 mark KU (g) When people use they are expected to use the appropriate netiquette. What is meant by netiquette? It is the way users are expected to behave when sending s. 1 mark Page 7

8 5 This question deals with content from General Purpose and Communications and Networks PS (a) Dino s Diner has the following logo. (See Exam paper) The graphic has been rotated -1 mark The knife, fork and plate at the top of the logo has been copied and pasted at the bottom. What other operation has been carried out to produce this logo? PS (b) They have decided to change the logo to look like the following. altered line width -1 mark (See Exam paper) What change has been made to the logo? PS (c) They wish to place the logo into a promotional leaflet but it doesn t fit. What can they do to solve this problem? resize it or change the scale -1 mark (d) Dino s Diner has a LAN which allows access to a WAN. KU (i) What is meant by a LAN? Local Area Network -1 mark L A N KU (ii) What is meant by a WAN? Wide Area Network -1 mark W A N KU (iii) State two differences between a LAN and a WAN. LAN small geographical area (eg. Within one building), WAN large geographical area (eg. Over countries) LAN uses cables/wireless WAN uses telecommunications link No Page 8

9 6 This question deals with content from Commercial Data James noticed a number of job vacancies in the computing section of the local newspaper. One was for a Analyst, another was for a Network Manager and some were for Programmers. KU (a) State two tasks associated with a Analyst. reviews the current system suggests suitable hardware/software any other suitable answer State two tasks associated with a Network Manager. set levels of access updates software create new user accounts any other suitable answer State two tasks associated with a Programmer. writes coding for user requirements maintains current software any other suitable answer (b) Adverts placed in the paper can be paid for using EFT. KU (i) What does EFT stand for? E F T PS (ii) State one advantage to the customer of using EFT. Electronic Funds Transfer 1 mark can make payment from home don t have to visit bank any other suitable answer 1 mark each bullet point - Max 1 mark PS (iii) State one advantage to the newspaper company of using EFT. don t have to visit bank to deposit cash/cheque money in account immediately any other suitable answer 1 mark each bullet point - Max 1 mark Page 9

10 6 This question deals with content from Commercial Data PS (c) The newspaper company has to consider the running costs of the computer system. State two possible running costs of the computer system. Upgrading software/hardware Toner/ink for printer Discs/re-writeable CDs for backup PS (d) The newspaper company sells lists of customers and company details who place adverts in their paper to other companies. Explain why other companies would pay for these lists. To provide them with a list of potential clients that they can target. 1 mark Page 10

11 6 This question deals with content from Industrial (a) A factory has recently installed an automated production line which uses robots. KU (i) State two reasons why a production line would be automated. more efficient than manual more accurate than manual KU (ii) State two costs to the factory of automating their system. Initial cost Replacement cost KU (iii) State two ways in which employees jobs may have changed since the factory has been automated. No longer have to work with dangerous goods May be retrained to operate/maintain robots (b) A simulator is used to train employees to use a forklift truck. PS (i) Give two reasons why a simulator would be useful in this situation. No damage to property/humans No cost implications because of damage to property PS (ii) Simulators operate in real time. Describe a problem that may occur if the simulator did not operate in real time. KU (iii) The simulator makes use of analogue signals. What is meant by the term analogue? PS (iv) State one activity where an analogue signal would be produced in this simulation. Any suitable problem eg. Turning the steering wheel must be in real time otherwise the reactions of the learner cannot be effectively tested 1 mark A signal that constantly varies 1 mark Turning steering wheel Raising prongs 1 mark for each bullet point Max 1 mark Page 11

12 6 This question deals with content from Industrial PS (c) Experienced forklift drivers also use the To improve driving technique simulator. State one way in which the To learn how to cope with exceptional simulator could be used to help them. circumstances 1 mark for each bullet point Max 1 mark Page 12

13 Source of Questions from Standard Grade Computing Studies General Marking Scheme. Question BROAD AREA MAIN ASPECT ITEM No 1 (a) General Purpose SPREADSHEET functions AVERAGE(..) 1 (b) General Purpose SPREADSHEET replicate 1 (c) General Purpose SPREADSHEET cell protection 1 (d) General Purpose SPREADSHEET alter cell format (eg number of decimal places) 1 (e) General Purpose SPREADSHEET functions MINIMUM(..) 1 (f) (i) Computer BACKING STORAGE comparison of backing storage 1(f) (ii) Computer BACKING STORAGE comparison of backing storage 1(g) General Purpose COMMON FEATURES OF MOST GENERAL PURPOSE PACKAGES Print part of file/document 2 (a) General Purpose 2 (b) General Purpose 2(c) General Purpose 2 (d) General Purpose 2 (e) Communication and Networks 2 (f) (i) General Purpose 2 (f) (ii) General Purpose DATABASE DATABASE DATABASE SECURITY AND PRIVACY INTERNET SECURITY AND PRIVACY SECURITY AND PRIVACY field types search on more than one field alter record format control of access (eg. passwords) broadband connection unauthorised access to data eg. hacking exceptions to right of access Page 13

14 Source of Questions from Standard Grade Computing Studies General Marking Scheme. Question BROAD AREA MAIN ASPECT ITEM No 3 (a) (i) Computer SYSTEMS SOFTWARE need for translation 3 (a) (ii) Computer SYSTEMS SOFTWARE purpose of high level languages 3 (b) Computer OPERATING SYSTEMS types of file: data; program 3 (c) Computer LOW LEVEL MACHINE representation of positive whole number, text 3 (d) Computer OUTPUT DEVICES comparison of printer (COMPUTER SYSTEMS) 3 (e) (i) Computer BACKING STORAGE (COMPUTER SYSTEMS) comparison of Backing - CD- Recordable, CD-Rewriteable 3 (e) (ii) Computer BACKING STORAGE CD-Recordable (COMPUTER SYSTEMS) 3 (e) (iii) Computer BACKING STORAGE (COMPUTER SYSTEMS) CD-Rewriteable 4 (a) General Purpose 4 (b) (i) General Purpose 4 (b) (ii) General Purpose 4 (c) (i) General Purpose 4 (c) (ii) General Purpose 4 (d) General Purpose 4 (e) General Purpose 4 (f) (i) Communications and Networks 4 (f) (ii) Communications and Networks 4 (g) Communications and Networks WORD PROCESSING WORD PROCESSING WORD PROCESSING WORD PROCESSING WORD PROCESSING WORD PROCESSING WORD PROCESSING ELECTRONIC COMMUNICATIONS ELECTRONIC COMMUNICATIONS ELECTRONIC COMMUNICATIONS standard paragraph search and replace search and replace spelling check spelling check grammar check table advantages of electronic mail disadvantages of electronic mail netiquette Page 14

15 Source of Questions from Standard Grade Computing Studies General Marking Scheme. BROAD AREA Question No 5 (a) General Purpose 5 (b) General Purpose 5 (c) General Purpose 5 (d) (i) Communications and Networks 5 (d) (ii) Communications and Networks 5 (d) (ii) Communications and Networks GRAPHICS GRAPHICS GRAPHICS MAIN ASPECT LOCAL AREA NETWORK AND WIDE AREA NETWORKS LOCAL AREA NETWORK AND WIDE AREA NETWORKS LOCAL AREA NETWORK AND WIDE AREA NETWORKS ITEM alter tool attributes rotate graphic scale graphic LAN WAN LAN/WAN 6 (a) (i) Commercial Data 6 (a) (ii) Commercial Data 6 (a) (iii) Commercial Data 6 (b) (i) Commercial Data 6 (b) (ii) Commercial Data 6 (b) (iii) Commercial Data 6 (c) Commercial Data 6 (d) Commercial Data IMPLICATIONS - SOCIAL IMPLICATIONS - SOCIAL IMPLICATIONS - SOCIAL IMPLICATIONS - TECHNICAL IMPLICATIONS - TECHNICAL IMPLICATIONS - TECHNICAL IMPLICATIONS - ECONOMIC IMPLICATIONS SECURITY AND PRIVACY systems analyst network manager programmer electronic funds transfer (EFT) electronic funds transfer (EFT) electronic funds transfer (EFT) running costs sale of customer lists 6 (a) (i) Industrial 6 (a) (ii) Industrial 6 (a) (iii) Industrial 6 (b) (i) Industrial 6 (b) (ii) Industrial 6 (b) (iii) Industrial 6 (b) (iv) Industrial 6 (c) Industrial NEED IMPLICATIONS -SOCIAL HARDWARE AND SOFTWARE HARDWARE AND SOFTWARE HARDWARE AND SOFTWARE HARDWARE AND SOFTWARE HARDWARE AND SOFTWARE IMPLICATIONS - ECONOMIC efficiency accuracy employment - changes in nature of job simulation simulation analogue I/O analogue I/O simulation high initial cost Page 15