CS(SG)09GMS. COMPUTING STUDIES STANDARD GRADE General Level NATIONAL QUALIFICATIONS. Marking Guidelines Perfect Papers All rights reserved

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G NATIONAL QUALIFICATIONS Marking Guidelines COMPUTING STUDIES STANDARD GRADE General Level This paper must be withdrawn from candidates any follow-up discussion of marks/grades awarded.

1 G NATIONAL QUALIFICATIONS Marking Guidelines COMPUTING STUDIES STANDARD GRADE General Level This paper must be withdrawn from candidates any follow-up discussion of marks/grades awarded.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 2008/2009. 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 Processing or Automated Systems 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 Packages General Purpose Packages and Communications and Networks General Purpose Packages and Computer Systems General Purpose Packages and Computer Systems General Purpose Packages Commercial Data Processing OR Question 6: Industrial Applications 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

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4 1 This question deals with content from General Purpose Packages GPP s: DATABASE: field types (numeric, text, graphic, date, time) A football team have all their players information held in a computer database. A record from the database is shown below. (see question paper) (a) What data types are the following fields? (i) Squad Number Number/numeric 1 PS (ii) Position Text 1 PS (iii) Picture Graphic/OLE Object 1 PS GPP s: BASE: search (b) Describe how you could use the database to find all the midfield players. Search on the Position field = midfield(er), GPP s: IMPLICATIONS -SOCIAL -SECURITY AND PRIVACY -ECONOMIC: control of access (eg passwords); unauthorised access to data (eg hacking) running costs (c) The football club secretary is worried about someone hacking into the database file. (i) What is hacking? (ii) State one method the club secretary could use stop the hackers. (d) State two running costs for the football club of using a computer system. Gaining unauthorised access to a computer system/data Encryption Usernames and passwords Electricity Printing cost Maintenance Hardware/software upgrades max 1 PS Page 4

5 1 cont This question deals with content from General Purpose Packages GPP s: HUMAN COMPUTER INTERFACE (HCI): Online help, online tutorial; Graphical User Interface (e) The database software has a GUI, online help and an online tutorial. (i) What does GUI stand for? (ii) What is the difference between online help and an online tutorial? Graphical User Interface 1 mark for 1 or 2 words correct, 2 marks for all 3. Max 2 KU On-line help has information on all features of package On-line tutorial has lessons on the basic features, GPP s: NEED: storage, retrieval and communicatio n of large quantities of information. (f) State two advantages of storing the information on computer instead of a manual system. Less physical storage space required Fast the sort and search Ease of backup, [Turn over Page 5

6 2 This question deals with content from General Purpose Packages and Communications and Networks Communications and Networks: INTERNET: HTML Paul is a Computing teacher who has a created a Website for his students. One of the pages is shown below. (see question paper) (a) Paul created the Website using HTML. What does HTML stand for? HyperText Markup Language All correct - 2 marks Two or three parts correct 1 marks Max 2 KU GPP s: SELECTION OF PACKAGES: potential of packages to fulfill more than one function (b) State two different types of general purpose package that could be used to make the Web page shown above. Web authoring Word processor DTP Communications and Networks: INTERNET: hyperlink (c) Why are some of the words on the Web page underlined? These words are hyperlinks 1 PS GPP s: WEB PAGE CREATION: add audio; add video (d) Paul wants to make his Web page more interesting to look at. Suggest two things he could add to it. Add audio Add video GPP s: GRAPHICS: scale graphic (e) Paul needs to scale the graphic. What effect will this have on the graphic? Resizes the graphic Make graphic larger/smaller max Page 6

7 2 cont This question deals with content from General Purpose Packages and Communications and Networks Communications and Networks: LOCAL AREA NETWORKS AND WIDE AREA NETWORKS: transmission media; LAN cables, wireless WAN telecommunication s (f) Paul s classroom has computers connected in a local area network (LAN). (i) State two advantages of using a LAN instead of stand alone computers. (ii) State two differences between a LAN and a WAN. Sharing peripherals Communication Share files LAN in a single building / room, WAN across larger area LAN has dedicated comms channels, WAN uses telephone lines (g) Paul is not sure whether to use cables or wireless transmission media to connect the network. Suggest the most suitable transmission media. Give two reasons for your answer. Media: cables Reason: more secure more reliable connection Media: wireless Reason: easier to expand allows mobility 2 marks for two good reasons [Turn over Page 7

8 3 This question deals with content from General Purpose Packages and Computer Systems PC Planet sells computers and computer accessories. The manager uses a spreadsheet to keep track of how much money each salesperson earns each month. Below is part of the spreadsheet. (see question paper) GPP s: SPREADSHEETS: complex formulae; functions AVERAGE(..), MINIMUM(..), MAXIMUM(..); (a) (i) G4 (ii) H5 What are the functions used in the following cells? Average(B4..E4) or AVG(B4:E4) 1 mark for the function and 1 mark for the range. Max 2 PS Max(B5..E5) or MAX(B4:E4) 1 mark for the function and 1 mark for the range. Max 2 PS GPP s: SPREADSHEETS: format and attributes (eg number of decimal places) (b) The manager changes the cell attributes of cells B4 to H6. (i) What is meant by the term cell attributes? How cell has been formatted (ii) Describe how the manager could change the cell attributes to show that the values are amounts of money. Format to currency For only 1 mark Apply sign/format to currency To 2 decimal places For 2 marks Page 8

9 3 cont This question deals with content from General Purpose Packages and Computer Systems Computer Systems: HARDWARE: comparison of backing storage in terms of: speed (data transfer); cost; capacity; CD- Rewriteable (CD-RW) USB Flash Drive (c) The manager has noticed that sales of USB flash drives have increased whereas the sales of CD-R/W disks have decreased. (i) What does CD-R/W stand for? (ii) State two reasons why USB flash drives have become more popular than CD-RW disks. Compact Disc Rewritable Higher capacity More robust Faster to read/write to Smaller Any other suitable Computer Systems: HARDWARE: Liquid Crystal Display (LCD); Thin Film Transistor (TFT) (d) The shop sells TFT and LCD monitors with all of its desktop PCs. (i) What does TFT stand for? (ii) What does LCD stand for? Thin Film Transistor Liquid Crystal Display digital still camera; digital video camera; webcam; microphone (e) Madia comes to the shop to buy hardware devices that will allow her to capture audio and video to go into a presentation she is making for her school project. (i) State a device she could buy to capture audio. microphone 1 PS (ii) State a device she could buy to capture video. Digital (video) camera 1 PS [Turn over Page 9

10 4 This question deals with content from General Purpose Packages and Computer Systems Computer Systems: SYSTEMS SOFTWARE: common features of high level languages; Vanessa writes computer programs. (a) Is it easier for her to write programs in a high-level language or a machine-code? Give a reason for your answer HLL Written using familiar word and symbols Uses an English-like language Procedural Easy to edit Computer Systems: OPERATING SYSTEMS types of file: data; program (b) What is the difference between a program file and a data file? A program is a list of commands for the computer to follow/an executable file A data file is created or used by a program Computer Systems: OPERATING SYSTEMS: interactive system (c) Vanessa is writing a program to control an interactive system. Describe an interactive system. Reacts immediately To user input Page 10

11 4 cont This question deals with content from General Purpose Packages and Computer Systems Computer Systems: HARDWARE: comparison of backing storage in terms of: speed (data transfer); cost; capacity; CD- Rewriteable (CD-RW) USB Flash Drive (d) When Vanessa finishes a program she saves a copy that can then be used on other computer systems so that other people can try it. Suggest a suitable backing storage media. Give a reason for your answer. Any portable writable backing storage media: o USB flash drive o CD-R, CD-R/W o DVD-R, DVD-R/W Due to potability/capacity/other suitable reason GPP s: WORD PROCESSING: standard paragraph (e) Vanessa needs to write the instructions for how to use one of her programs. She makes use of standard paragraphs when doing this. (i) What is a standard paragraph? Stored/saved text Inserted into documents many times If answer includes spaces for personal details then 0 marks candidate describing standard letter. (ii) State two reasons why standard paragraphs make it easier for her. Faster than typing need to check for errors [Turn over Page 11

12 5 This question deals with content from General Purpose Packages GPP s: WORD PROCESSING: spelling check Lewis is writing a newspaper story about a new hotel, The Grande. He uses a word processor. GPP s: EXPERT SYSTEMS: Purpose of Expert Systems Applications (a) Lewis uses the spelling check in the word processor. Describe how a spell checker works. (b) An expert system has been developed to help people choose the correct the best hotel for them in the local area. What is an expert system? The spell checker has a dictionary of words All words in the document are checked against the dictionary Any words not in the dictionary are highlighted Alternative words are suggested max 3 KU Application that uses AI Asks the user questions Gives a solution based on the users answers GPP s: WEB PAGE CREATION: use wizard or template (c) Lewis sends his report to the newspaper editor using electronic mail. State two reasons why Lewis prefers to use electronic mail instead of sending reports by post. cost arrives almost instantly Page 12

13 6 This question deals with content from Commercial Data Processing DATA COLLECTION, PREPARATION AND INPUT: magnetic ink character recognition (MICR); Marco pays a cheque into his bank account. (a) His account details from the cheque are inputted into the banks computer system using MICR. (i) What does MICR stand for? Magnetic Ink Character Recognition All correct - 2 marks Two or three parts correct 1 mark Max 2 KU (ii) State two reasons why the bank uses MICR on cheques. Fast/accurate data entry Very difficult to forge Can be ready if dirty, IMPLICATIONS SOCIAL TECHNICAL ECONOMIC SECURITY AND PRIVACY: physical and software security (b) All customer account details are held on the banks computer system. State two physical security measures that could be done to ensure that only authorised people can access this data. Keep computers in a locked room Biometric security [Turn over Page 13

14 6 cont This question deals with content from Commercial Data Processing IMPLICATIONS SOCIAL TECHNICAL ECONOMIC SECURITY AND PRIVACY: job types and careers programmer systems analyst engineer network manager (c) From the list of people who work for the bank below, select the correct person for each job description. (see question paper) Sets up user accounts and backups the network: Looks at ways to improve the computer system: Network manager System analyst 2 PS DATA COLLECTION, PREPARATION AND INPUT: check digit; types of check (eg length, range) (d) Marco s account number is shown below (i) It includes a check digit. Why is a check digit used? Ensuring the account number is entered correctly (ii) Which of the numbers in Marco s account number will be the check digit? 4 (or the last number) max 1 PS Page 14

15 6 This question deals with content from Industrial Applications A new miniature train has been designed to take people on rides round a park. The train is an automated system that does not have a driver. HARDWARE AND SOFTWARE: guides magnetic and light (a) There are two methods of guiding the train round the park, light and magnetic guidance. (i) Describe how a light guidance system works.. A sensor detects a white line and follows it (ii) Describe how a magnetic guidance system works. A sensor detects a magnetic strip under the floor and follows it (iii) Which of the two methods, described above, is better for the park? Give a reason for your answer. Magnetic guidance: Line can not be worn out or get dirty So lasts longer Light guidance: Easier to install Easy to change IMPLICATIONS SOCIAL TECHNICAL ECONOMIC: employment changes in nature of job (b) Describe two ways in which the employees job may have changed since the introduction of the automated train. Some may have lost their jobs They will have been retrained Less manual labour [Turn over Page 15

16 6 cont This question deals with content from Industrial Applications IMPLICATIONS SOCIAL TECHNICAL ECONOMIC: safety precautions (c) Describe two safety precautions that should be taken to ensure that no one is injured by the automated train. Fence off areas where the train runs Fit the train with a siren/flashing lights Fit the train with a sensor to detect obstacles IMPLICATIONS SOCIAL TECHNICAL ECONOMIC: high initial cost (d) The new train had a high initial cost. (i) State what is meant by the term initial cost? A cost that has to be paid when the system is first set up (ii) State one initial cost of the train. A system analysis Buying hardware and software Installing the system Training staff max 1 PS [END OF MARKING SCHEME] Page 16

CS(SG)09FMS. COMPUTING STUDIES STANDARD GRADE Foundation Level NATIONAL QUALIFICATIONS. Marking Guidelines

CS(SG)09FMS. COMPUTING STUDIES STANDARD GRADE Foundation Level NATIONAL QUALIFICATIONS. Marking Guidelines F NATIONAL QUALIFICATIONS Marking Guidelines COMPUTING STUDIES STANDARD GRADE Foundation Level This paper must be withdrawn from candidates any follow-up discussion of marks/grades awarded. This is to