PHS CyberSchool

Computer Studies SG 

Last updated 27 Nov 2005

Theory examination November 2005 - 90 minutes - 75 marks

Question 1 - Multiple-choice questions - 1 mark each - 20 marks

Select the answer to each question which you think is the correct or the best answer. Just write down the letter.

1. C
2. C
3. A
4. A
5. C
6. B
7. B
8. A
9. A
10. C
11. A
12. C
13. D or A
14. A
15. A
16. D
17. C
18. B
19. D
20. C

[20]

Question 2 - Computer architecture - 15 marks

1.  

   1. 40 GB (1)

   2. Write CD’s / CD-RW (1)

2.  

   1. In a slot on the motherboard (1)

   2. Uses light instead of ball / Uses laser/infrared LIGHT instead of ball / Does not get dirty / (Do not accept laser/infrared connection) (1)

   3. PS/2 (1)

   4. Easy to plug in a peripheral / USB is hot swappable / 127 devices  (2)
   5. (16 MB AGP) video card, (15”) Monitor (2)

3.  

   1. Able to connect to PC without rebooting (1) 

   2. Radio signals (1)

   3. Registers are used to hold the addresses of instructions and data in memory (1) that the CPU is currently working on (1) 

   4. Arithmetic Logic Unit and Control Unit. (2)

[15]

Question 3 - System software - 10 marks

1.  
   1. Quotation A (1)
   2. McAfee Antivirus (1)
2. Ms Office 2000 (1)
3.  
   1.  
      1. Shareware can be used free of charge for a trial period after which some form of payment is normally required. (1)
      2. Open Source:  Software that is freely available and where the source code of the program is available and anybody may edit/adjust it subject to the GPL.  (1)
   2. Basic Input and Output System (1)
   3.  
      1. Diagnostic Routines - tests all components 
      2. Initialiasing Routines- set up 
      3. BIOS functions - constructs interrupt sectors 
      4. Bootstrap Loader - obtains operating sytem from disk and loads into memory - needs 3 with explanations (3)
   4. Drivers allow the Operating system to access and control hardware not supported by the BIOS, acts as translator between device and program. (1) 

   [10]

   Question 4 - Data communication - 15 marks

   1.  
      1. looks like a circuit board/PC card - in notebook computers and on some motherboards the modem is in fact an integrated chip (1)
      2. Switch digital signals to analogue and analogue to digital signals in order to send and receive, Connects computers via a telephone line to the Internet (1)
      3. External modem can be switched off without switching off the computer.  Data communication is “visible” with lights flickering. It is easy to move it to another computer. Easier to instal/replace.  (1)
   2.  
      1. Network interface card (not network card) (1) 
      2. share expensive hardware, sace on capital expenses, centralisation of data, communications security (not cheaper) (2)
      3. Add new users, give rights, document network, install antivirus software  (2) 

      4. Fibre optic is faster, less interference, low attenuation,  reliable, longer distances, no EMI, no eavesdropping, no cross talk, thin and lightweight, (do not accept thinner)  (2)

   3.  
      1. The layout of the network (1)
      2.  (4)
         1. bus
         2. ring
         3. star
         4. bus / star

   [15]

   Question 5 - Social implications and ethical issues - 15 marks

   1. Software - buyer must receive disks and licence (2)
   2.  
      1. repetative jobs are being done by computers  (1)
      2. people have to maintain and service computers  (1)
   3.  
      1. improves keyboard skills, general computer knolwedge. (1)
      2. mind thumbing, bad socialisation, addictive (1)
   4.  
      1. https: (1)
      2. padlock (1)
      3. digital  (1)
      4. fear, lack of computers, cost (1)
   5. Advantages - speed, reliability, simplicity: Disadvantages - needs a computer, can be misinterpreted, does not have personal touch (2)
   6. pda, laptop (1)

   [15]

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   This work may be freely copied for non-commercial use only. Copyright © Pam Miller.