computer c omponents, the stored program concept and the ... · comp 2 computer components, the...

General Certificate of Education

Advanced Subsidiary Examination

January 2009

Computing COMP2

Comp 2 Computer Components, The Stored ProgramConcept and The Internet

Monday 12 January 2009 1.30 pm to 2.30 pm

Time allowed� 1 hour

Instructions� Use black ink or black ball-point pen.

� Fill in the boxes at the top of this page.

� Answer all questions.

� You must answer the questions in the spaces provided. Answers written

in margins or on blank pages will not be marked.

� All working must be shown.

� Do all rough work in this book. Cross through any work you do not want

to be marked.

Information� The marks for questions are shown in brackets.

� The maximum mark for this paper is 60.

� The use of brand names will not gain credit.

� Question 7 should be answered in continuous prose. In this question you will be marked on your

ability to:

– use good English

– organise information clearly

– use specialist vocabulary where appropriate.

You will need no other materials.

You must not use a calculator.

Centre Number Candidate Number

Surname

Other Names

Candidate Signature

COMP2M/Jan09/COMP2 6/6/6/6/6/(JaN09COMP201)

For Examiner’s Use

Examiner’s Initials

Question Mark

1

2

3

4

5

6

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8

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11

12

TOTAL

C165435_COMP2_Jan_2009 3/10/08 14:00

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Job Name: Synapse Prepare JobJob Number: V14Proof Due: Sun, Apr 7, 2002Final Due: Fri, Jan 1, 1904Company: Synapse Prepare Inc.Contact: ToddAddress: 18 PDF LaneCity: AlbertvilleState: BC Zip: Country: Office Phone: 555-555-1212Email: [email protected]: Please call if you have questions about this job�

Answer all questions in the spaces provided.

1 A computer system consists of hardware and software.

1 (a) What is meant by hardware?

.............................................................................................................................................

.............................................................................................................................................(1 mark)

1 (b) What is meant by software?

.............................................................................................................................................

.............................................................................................................................................(1 mark)

2 Table 1 lists a number of items of software. You are asked to show which software categoryeach item belongs to.

Write in the appropriate cells in Table 1 the letter of the category which best fits each itemof software. No letter should be used more than once.

Table 1

(4 marks)

A – System Software

B – Bespoke Software

C – Utility Software

D – General Purpose Software

E – Special Purpose Software

SoftwareCategory

(letter only)

Spreadsheet Software

Anti-virus Software

Operating System

Air Traffic Control Software

2 Areas outsidethe box will

not be scannedfor marking

4

2

M/Jan09/COMP2(02)

C165435_COMP2_Jan_2009 29/9/08 08:30

3 (a) The high-level language statement

A := B + 5

is to be written in assembly language.

Complete the following assembly language statements, which are to be the equivalentof the above high level language statement. The Load and Store instructions implythe use of the accumulator register.

Load ..........

............ #5

Store .........(3 marks)

3 (b) (i) What type of translator is required to translate assembly code statements intomachine code?

....................................................................................................................................(1 mark)

3 (b) (ii) What type of translator is required to translate a high-level language statementinto machine code?

....................................................................................................................................(1 mark)

Turn over for the next question



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C165435_COMP2_Jan_2009 22/9/08 12:13




4 Figure 1 shows the HTML for a web page.

Figure 1

4 (a) With reference to the contents of Figure 1, draw a diagram to show the appearance ofthe web page when viewed through a web browser. Use labels to clarify your layout,where necessary.

(6 marks)

<html><head><title>A-Level Computing</title><style type=''text/css''>

h1 {

}</style>

</head>

<!************>

<body><h1>The New Assessment Structure</h1><ol>

<li> The Practical Exercise </li><li> AS Theory Exam </li><li> A2 Theory Exam </li><li> The Project </li>

</ol><a href=''www.aqa.org.uk''>More information</a>

</body></html>



M/Jan09/COMP2(04)

C165435_COMP2_Jan_2009 22/9/08 12:13

4 (b) (i) Write a style rule to be added to the embedded style sheet to centre the headingtext and set the text to blue.

....................................................................................................................................(2 marks)

4 (b) (ii) Indicate with an X in Figure 1 where the style rule should be added.(1 mark)

5 The Fetch-Execute cycle can be described in register-transfer language as follows:

MAR [PC]PC [PC] + 1; MBR [Memory]addressed

CIR [MBR][CIR] decoded and executed

where [ ] means contents of.

Describe the Fetch-Execute cycle in your own words.

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.......................................................................................................................................................(6 marks)

→→→

→



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C165435_COMP2_Jan_2009 8/5/08 15:56

6 A Uniform Resource Locator (URL) is the address of a resource on the Internet. Forexample, http://www.aqa.org.uk/qual/gce/computing_new.php.

Explain the different parts of this address.

6 (i) http://....................................................................................................................................

6 (ii) www.aqa.org.uk ..................................................................................................................

6 (iii) /qual/gce/computing_new.php ............................................................................................

.............................................................................................................................................(3 marks)



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C165435_COMP2_Jan_2009 8/5/08 15:56

7 Explain the difference between the World Wide Web, the Internet and an intranet.

Your answer to this question will also be assessed on your ability to organise your answerclearly and coherently in complete sentences, using specialist vocabulary where appropriate.

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C165435_COMP2_Jan_2009 8/5/08 15:56

8 (a) Write in the appropriate cells in Table 2, the names of the secondary storage medialisted below that most closely match the given typical storage capacities. You may useeach medium more than once.

DVD-R flash memory card magnetic hard disk CD-ROM magnetic tape cartridge

Table 2

(5 marks)

8 (b) Which of the above storage media would be most suitable to

8 (b) (i) distribute software? ...................................................................................................(1 mark)

8 (b) (ii) backup large data files? ............................................................................................(1 mark)

Typical Capacity Storage Medium

10 Gigabytes – 2 Terabytes

10 Gigabytes – 800 Gigabytes

128 Megabytes – 8 Gigabytes

2.8 Gigabytes – 4.7 Gigabytes

600 Megabytes – 700 Megabytes



7

M/Jan09/COMP2(08)

C165435_COMP2_Jan_2009 29/9/08 08:31

9 One principle of the Data Protection Act refers to ‘internal data security’. It states that,‘Appropriate technical and organisational measures shall be taken against unauthorised orunlawful processing of personal data and against accidental loss or destruction of, or damageto, personal data.’

9 (a) What is personal data?

.............................................................................................................................................

.............................................................................................................................................

.............................................................................................................................................(1 mark)

9 (b) Imagine you are working for an organisation that uses personal data.

Describe three measures you would propose that will contribute to the organisationcomplying with the above principle of the Data Protection Act.

1 ..........................................................................................................................................

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2 ..........................................................................................................................................

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3 ..........................................................................................................................................

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.............................................................................................................................................(3 marks)

Turn over for the next question



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C165435_COMP2_Jan_2009 15/7/08 09:36




10 (a) Complete the truth tables for the following logic gates.

OR gate AND gate

(2 marks)

10 (b) (i) A single output Q is produced from three inputs A, B and C. Output Q isrequired to be 1 only if inputs A and B are 1, or input C is 1 and input B is 0.

Express this as a Boolean equation.

Q = ............................................................................................................................(2 marks)

10 (b) (ii) Represent this Boolean equation diagrammatically by completing the logic gatediagram below.

(4 marks)

C B A

Q

InputA

InputB

Output

0 0

0 1

1 0

1 1

InputA

InputB

Output

0 0

0 1

1 0

1 1



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M/Jan09/COMP2(10)

C165435_COMP2_Jan_2009 22/9/08 12:16




11 A Radio Frequency Identification (RFID) system is made up of a transponder built into anRFID tag and an interrogator or reader. One example of use is to detect unauthorisedremoval of library books from a library.

Explain the principles of operation of this RFID system.

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12 (a) Describe what is meant by a robot.

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12 (b) Illustrate your answer to part (a) with an example application of where robots are usedand why.

Application: ........................................................................................................................

Why: ...................................................................................................................................

.............................................................................................................................................

.............................................................................................................................................

.............................................................................................................................................(2 marks)

END OF QUESTIONS



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C165435_COMP2_Jan_2009 8/5/08 15:56

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