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Computer Studies SG Grade 11

Last updated 26 May 2003

Theory examination May 2003 - Answers

Section A - 30 marks

Question 1 - Multiple-choice questions - 1 mark each - 5 marks

  1. C
  2. C
  3. A
  4. D
  5. B

/5/

Question 2 - Matching columns - 25 marks

  1. Bus that connects the CPU and memory, providing a pathway to the computer's peripherals. - 14 - Data bus
  2. Component of the central processing unit that decodes, synchronises and executes program instructions. - 12, 13 - Control unit
  3. CPU processing function regulator that produces a pulse at regular intervals. - 32 - System clock
  4. Data to be processed that is entered into the computer from a keyboard, disk drive, or other input device. - 17 - Input
  5. Device with a keyboard for inputting data to a computer and a display screen for receiving data from the computer. - 33 - Terminal
  6. Eight bits grouped together to represent a character (a letter, number, or symbol). - 8,9 - Byte
  7. Electronic circuit containing thousands of electronic components combined on one chip. - 18 - Integrated circuit (IC)
  8. Electronic switching circuit that performs a logic operation; its binary output is entirely determined by the combination of binary input. - 19 - Logic circuit
  9. Highway of parallel wires along which signals are sent from one part of the computer to another. - 6 - Bus
  10. Linked series of programs that controls, assists, and supervises all other programs on a computer system and that allows dissimilar hardware systems to work together. - 24 - Operating system
  11. Main part of a computer.  Contains internal memory, an arithmetic/logic unit, and control circuitry and performs data-processing and timing and controlling functions. - 10 - Central processing unit (CPU)
  12. Memory chip soldered into a separate integrated circuit board which is then plugged onto the motherboard, usually associated with RAM. - 30 - SIMM
  13. Number of bits, such as 16 or 32, that can travel through the bus at the same time. - 7 - Bus width
  14. Part of the central processing unit that determines the sequence of computer activities, interprets instructions, and controls the way in which those instructions are carried out. - 12,13 - Control unit
  15. Permanent computer memory system containing data and instructions that can be retrieved and used but never altered. - 29 - Read-only memory (ROM)
  16. Physical components of a computer system, such as the chips, disk drives, monitor, and other devices. Distinguished from software. - 16 - Hardware
  17. Section of the central processing unit that performs arithmetic and logic operations. - 2 - Arithmetic/logic unit
  18. Set of wires running from the central processing unit (CPU) to random-access memory (RAM). - 1 - Address bus
  19. Single chip containing all the components found in a computer's central processing unit. - 22 - Microprocessor
  20. Step-by-step series of instructions directing the computer to carry out a sequence of actions in order to perform an operation or to solve a problem. - 26 - Program
  21. Storage area in which a computer saves data and from which it retrieves data. - 15,21 - Memory, Disk drive
  22. Temporary computer memory system in which data can be stored and from which data can be quickly retrieved. - 28 - Random-access memory (RAM)
  23. Thin slice of silicon containing an integrated circuit. - 11 - Chip, or microchip
  24. Unit of information, composed of bits and bytes, that can be stored in one memory location name. - 34 - Word
  25. Unit of measurement equal to1 million cycles per second, commonly used to compare the clock speeds of computers. - 20 - Megahertz

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Section B

Question 3 - Computer architecture - 28 marks

  1. The number of registers that a CPU has and the size of each help determine the power an speed of a CPU. A 32-bit CPU is one in which each register is 32 bits wide. Therefore each CPU instruction can manipulate 32 bits of data.

    2. [2]

  2.  
    1. expansion slot     (1)
    2. transistor, semi conductor  (1)
    3. buses  (1)

      [3]

  3.  
    1. BIOS (1)
    2. normal primary memory (1)
    3. data or instructions likely to be used by the processor (1)
    4. store data in cache, cache memory (1)
    5. nothing (1)
    6. BIOS - system programs (1)
    7. able to read and write to memory 10-15% faster, pipiline burst mode (1)
    8. temporary storage of memory (1)
    9. Dynamic RAM (1)

    [9]

  4.  
    1. Possible, has an CDRW (1)
    2. Useless to buy an old 386 computer, cannot buy software or peripherals  (2)
    3. scanner  (1)
    4. 60 GB(1)
    5. No FrontPage is not listed and is not part of any of the packages installed.(1)
    6. Yes.  A word processing package is part of MS Works.
    7. 256  (1)
    8. RAM
    9. 3½"
    10. DVD, CD ROM drive (1)
    11. MS Windows XP Home (1)
    12. 56 K modem (1)
    13. ergonomic, Internet, QWERTY (1)
    14. Intel Pentium (1)
    15. speakers, CD writer, etc.

    [14]

/28 /

Question 4 - Data communication - 17 marks

  1. MWeb, IAfrica, Intekom, Netactive, Kingsley, Yebonet, Infosat. (4)

    [4]

  2. modem speed, bandwidth of communication channel, speed of ISPs computers, speed of own computer.

    [3]

  3.  
    1. did a search for tips on Excel, found the link on the search engine, read the tip sheets, found them inadequate.  (2)
    2. calculate amount of stel used. (1)
    3. emoticon, smiling (1)
    4. can find information, communicate, shop online (3)  (3)
    5. search engine, Google, Alta Vista. (3)
    6. Amazon.com, Kalahari.net

    4. [12]

  4.  
    1. give better service to their clients, draw more clients. (1)
    2. easier and safer for clients. (1)
    3. Most web sites are in English and not any African language, access is difficult (2)
    4. www.absa.co.za (1)
    5. use a pin number.  (1)
    6. browser, Internet Explorer, Netscape Navigator (2)
    7. transfer money, order cheque books, pay taxes, pay accounts (3)
    8. can draw cash (1)
    9. credit card, debit card. (2)

[14]

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Question 5 - Application skills - 9   marks 

  1. One of the fields in a database of items found in a music shop that sells compact disks and tapes will be formatted as TEXT, e.g. the TITLE of the music recording. Name four other formats (with the exception of text) and for each give an example of such a field in the relevant database.

    [4]

  2.  
    1. 50 (1)
    2. anything.mdb (1)
    3. membership number (1)

[5]

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