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CS(SG)09GMS

NATIONAL QUALIFICATIONS

COMPUTING STUDIES STANDARD GRADE General Level

Marking Guidelines

This paper must be withdrawn from candidates any follow-up discussion of marks/grades awarded.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.

© 2008- 2009 Perfect Papers – All rights reserved .


Standard Grade Computing Studies - General Level Marking Instructions KU - Knowledge and understanding PS - Problem solving

Commentary on paper

Structure of 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: General Purpose Packages Question 2: General Purpose Packages and Communications and Networks Question 3: General Purpose Packages and Computer Systems Question 4: General Purpose Packages and Computer Systems Question 5: General Purpose Packages Question 6: 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 ≥ 25 3 ≥ 25 3 ≥ 18 4 ≥ 18 4 < 18 7 < 18 7


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No Commentary 1 This question deals with content from General Purpose Packages Type Question Marking Scheme

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

GPP’s: DATABASE: field types (numeric, text, graphic, date, time)

(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)” 1 mark for each bullet,

max 2 PS

(c) The football club secretary is worried

about someone hacking into the database file.

(i) What is hacking? Gaining unauthorised access to a computer

system/data 1 KU

(ii) State one method the club

secretary could use stop the hackers.

• Encryption • Usernames and passwords • Any other suitable answer 1 mark for each bullet

max 1 PS

GPP’s: IMPLICATIONS -SOCIAL -SECURITY AND PRIVACY -ECONOMIC: control of access (eg passwords); unauthorised access to data (eg hacking) running costs

(d) State two running costs for the football club of using a computer system.

• Electricity • Printing cost • Maintenance • Hardware/software upgrades • Any other suitable answer 1 mark for each bullet

max 2 KU


No Commentary 1 cont This question deals with content from General Purpose Packages Type Question Marking Scheme

(e) The database software has a GUI, online help and an online tutorial.

(i) What does GUI stand for? Graphical User Interface

1 mark for 1 or 2 words correct, 2 marks for all 3.

Max 2 KU

GPP’s: HUMAN COMPUTER INTERFACE (HCI): Online help, online tutorial; Graphical User Interface (ii) What is the difference between

online help and an online tutorial? • On-line help has information on all features

of package • On-line tutorial has lessons on the basic

features • Any other suitable answer 1 mark for each bullet,

max 2 KU GPP’s: NEED: storage, retrieval and communication 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 • Any other suitable answer 1 mark for each bullet,

max 2 KU

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No Commentary 2 This question deals with content from General Purpose Packages and Communications and

Networks Type Question Marking Scheme

Paul is a Computing teacher who has a created a Website for his students. One of the pages is shown below. (see question paper)

Communications and Networks: INTERNET: HTML

(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

(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 • Any other suitable answer 1 mark for each bullet

max 2 PS

GPP’s: SELECTION OF PACKAGES: potential of packages to fulfill more than one function

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 • Any other suitable answer 1 mark for each bullet

max 2 PS 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 1 mark for each bullet

max 1 KU


No Commentary 2 cont This question deals with content from General Purpose Packages and Communications and

Networks Type Question Marking Scheme

(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.

• Sharing peripherals • Communication • Share files • Any other suitable answer 1 mark for each bullet

max 2 KU

(ii) State two differences between a LAN and a WAN.

• LAN in a single building / room, WAN across larger area

• LAN has dedicated comms channels, WAN uses telephone lines

• Any other suitable answer 1 mark for each bullet

max 2 KU

Communications and Networks: LOCAL AREA NETWORKS AND WIDE AREA NETWORKS: transmission media; LAN — cables, wireless WAN — telecommunications

(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

max 2 PS

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No Commentary 3 This question deals with content from General Purpose Packages and Computer Systems Type Question Marking Scheme 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)

(a) What are the functions used in the following cells?

(i) G4

Average(B4..E4) or AVG(B4:E4) 1 mark for the function and 1 mark for the range.

Max 2 PS (ii) H5

Max(B5..E5) or MAX(B4:E4) 1 mark for the function and 1 mark for the range.

Max 2 PS

GPP’s: SPREADSHEETS: complex formulae; functions AVERAGE(..), MINIMUM(..), MAXIMUM(..);

(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 1 KU

GPP’s: SPREADSHEETS: format and attributes (eg number of decimal places)

(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

max 2 PS


No Commentary 3 cont This question deals with content from General Purpose Packages and Computer Systems Type Question Marking Scheme

(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? Compact Disc – Rewritable 1 KU

Computer Systems: HARDWARE: comparison of backing storage in terms of: speed (data transfer); cost; capacity; CD- Rewriteable (CD-RW) USB Flash Drive

(ii) State two reasons why USB flash drives have become more popular than CD-RW disks.

• Higher capacity • More robust • Faster to read/write to • Smaller • Any other suitable 1 mark for each bullet

max 2 PS

(d) The shop sells TFT and LCD monitors with all of its desktop PCs.

(i) What does TFT stand for? Thin Film Transistor

1 KU (ii) What does LCD stand for? Liquid Crystal Display

1 KU

(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

Computer Systems: HARDWARE: Liquid Crystal Display (LCD); Thin Film Transistor (TFT) digital still camera; digital video camera; webcam; microphone

(ii) State a device she could buy to capture video.

Digital (video) camera 1 PS

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No Commentary 4 This question deals with content from General Purpose Packages and Computer Systems Type Question Marking Scheme

Vanessa writes computer programs.

Computer Systems: SYSTEMS SOFTWARE: common features of high level languages;

(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 • Any other suitable answer 1 mark for each bullet

max 2 PS

(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 1 mark for each bullet

max 2 KU

Computer Systems: OPERATING SYSTEMS types of file: data; 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 1 mark for each bullet

max 2 KU


No Commentary 4 cont This question deals with content from General Purpose Packages and Computer Systems Type Question Marking Scheme 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

1 mark for each bullet max 2 PS

(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 1 mark for each bullet If answer includes “spaces for personal details” then 0 marks – candidate describing standard letter.

max 2 KU

GPP’s: WORD PROCESSING: standard paragraph

(ii) State two reasons why standard paragraphs make it easier for her.

• Faster than typing • No need to check for errors • Any other suitable answer 1 mark for each bullet

max 2 PS

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No Commentary 5 This question deals with content from General Purpose Packages Type Question Marking Scheme

Lewis is writing a newspaper story about a new hotel, The Grande. He uses a word processor.

GPP’s: WORD PROCESSING: spelling check

(a) Lewis uses the spelling check in the word processor. Describe how a spell checker works.

• 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 1 mark for each bullet

max 3 KU GPP’s: EXPERT SYSTEMS: Purpose of Expert Systems Applications

(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?

• Application that uses AI • Asks the user questions • Gives a solution based on the users answers 1 mark for each bullet

max 2 KU 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.

• No cost • Email arrives almost instantly • Any other suitable answer 1 mark for each bullet

max 2 PS


No Commentary 6 This question deals with content from Commercial Data Processing Type Question Marking Scheme

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

DATA COLLECTION, PREPARATION AND INPUT: magnetic ink character recognition (MICR);

(ii) State two reasons why the bank uses MICR on cheques.

• Fast/accurate data entry • Very difficult to forge • Can be ready if dirty 1 mark for each bullet,

max 2 PS 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 • Any other suitable answer 1 mark for each bullet

max 2 KU

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No Commentary 6 cont This question deals with content from Commercial Data Processing Type Question Marking Scheme

(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:

Network manager

IMPLICATIONS SOCIAL — TECHNICAL — ECONOMIC — SECURITY AND PRIVACY: job types and careers — programmer — systems analyst — engineer — network manager

Looks at ways to improve the computer system:

System analyst

2 PS

(d) Marco’s account number is shown

below. 79583054

(i) It includes a check digit. Why is a check digit used?

Ensuring the account number is entered correctly

1 KU (ii) Which of the numbers in

Marco’s account number will be the check digit?

4 (or the last number) max 1 PS

DATA COLLECTION, PREPARATION AND INPUT: check digit; types of check (eg length, range)


No Commentary 6 This question deals with content from Industrial Applications Type Question Marking Scheme 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.

(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

1 KU (ii) Describe how a magnetic

guidance system works.

A sensor detects a magnetic strip under the floor and follows it

1 KU

HARDWARE AND SOFTWARE: guides — magnetic and light

(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

1 mark for each bullet

max 2 PS 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 • Any other suitable answer 1 mark for each bullet

max 2 KU

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No Commentary 6 cont This question deals with content from Industrial Applications Type Question Marking Scheme 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 • Any other suitable answer 1 mark for each bullet

max 2 PS

(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

1 KU

IMPLICATIONS SOCIAL — TECHNICAL — ECONOMIC: high initial cost

(ii) State one initial cost of the train. • A system analysis • Buying hardware and software • Installing the system • Training staff • Any other suitable answer 1 mark for each bullet

max 1 PS

[END OF MARKING SCHEME]

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