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Computer Studies SG Grade 12 - 2006

Last updated 07 Jun 2006

Theory examination May 2006 - 90 minutes - 71 marks

Question 1 - Multiple-choice questions - 1 mark each - 10 marks

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

  1. A device that makes use of logical and physical adddressing to connect two logically different networks:
    1. Bridge
    2. Gateway
    3. Repeater
    4. Router
  2. Which ONE of the following functions is NOT provided by an operating system?
    1. Instructions to coordinate the flow of information between the programs, files, printers, storage devices and other components of your computer system
    2. Programs for organising files
    3. Programs that allow you to specify the operation of the mouse
    4. Spell checker for your documents
  3. A business has 100 personal computers linked to a server. Which one of the following people is responsible for the maintenance of the network and the daily backup of data?
    1. System analyst
    2. Computer engineer
    3. Network technician
    4. Network administrator
  4. You use ... to organise files on the hard disk. 
    1. Access 
    2. Internet Explorer 
    3. the control panel 
    4. Windows Explorer 
  5. Which ONE of the following operating systems can read disks which use FAT, VFAT, NTFS or MPFS? 
    1. Linux 
    2. UNIX 
    3. Windows 98 
    4. Windows NT 
  6. Which transmission medium is immune to interference and eavesdropping from outside the cable, has a low attenuation rate, is reliable and secure, but its installation is complex and it is difficult to maintain? 
    1. Coaxial cables 
    2. Fibre optic cables 
    3. Infrared cables
    4. Twisted pair cables 
       
  7. Which of the following is NOT a function of network administrator?
    1. To analyse the load on the network.
    2. To be responsible for the security of the data on the network.
    3. To install all the cabling on the network.
    4. To maintain a network database system of users of the network.
  8. Which of the following can be called a utility program?
    1. Microsoft Excel
    2. Microsoft Paint
    3. Microsoft Works
    4. WinZip
  9. Processing method that lets it appear as if the operating system carries out more than one task (program) simultaneously while only one processor is concerned.
    1. Batch processing
    2. Multiprocessing
    3. Multitasking
    4. Real-time processing
  10. Which of the following ports is used by wireless devices to transmit signals?
    1. IrDA port
    2. Parallel port
    3. Serial port
    4. USB port

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Question 2 - Matching columns - 1 each - 10 marks

Write down the letter of the item in Column B which best matches the description in Column A.

Column A Column B
  1. Additional programs in an operating system. We do not use them every day but they facilitate more effective computer management.
  2. Amplify and regenerates signals received from one LAN cable and then transmit upgraded signals.
  3. Can link two networks that do not have an identical architecture.
  4. Central location to link all the computers together.
  5. Collection of software that makes it easier for you to use the computer.
  6. Most critical part of the operating system. It is loaded into a protected area of main memory when the machine starts up, and remains there while the machine is on.
  7. Network that connects a company's branch offices in different towns and on different continents.
  8. Part of the operating system designed to receive and interpret instructions from the user.
  9. Set of programs that monitors and controls all hardware and software activities within a computer system and acts as the user's interface with the computer.
  10. When a network is installed today, this device would more than likely be used as it generally also includes the functions of a repeater and bridge.
  1. Application software
  2. Enterprise network
  3. Global network
  4. Hub
  5. Kernel
  6. Operating system
  7. Repeaters
  8. Router
  9. Switch
  10. System software
  11. User interface/shell
  12. Utilities

 

/10/

Question 3 - System software - 20 marks

  1. John decided to protect his computer against viruses. He bought anti-virus software and installed it. According to the manual supplied with the program, the program will be resident and it will be updated free of charge for a period of two years. A web address of the distributors is also provided.
    1. In this context, what does resident mean? (1)
    2. Why must the program be updated regularly? (1)
    3. Where will John probably search for an update?  (1)
  2. Are each of the following network operating systems used in server based OR peer-to-peer LANs?
    1. Novell Netware (1)
    2. Windows 2000 (1)
  3. List TWO features of network operating systems not found in modern operating systems. (2)
  4. Give TWO examples of utility packages and indicate how each is used.  (2)
  5. You find that the hard disk of your computer is nearly full.  How can you free up space on the hard disk?  Give TWO steps which you could follow and discuss each one in detail. (2)
  6. What is the difference between application and system software? Give an example of each. (2)
  7. To optimise the performance of a hard drive, it is necessary to organise and maintain the hard drive properly. Name THREE tasks which can be scheduled automatically by the Windows Maintenance Assistant and briefly explain the function of each task. (3)
  8. List FOUR functions of an operating system. (4)

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Question 4 - Networking and data communications - 31 marks

  1. Write the missing word in the following sentences next to the number of the question. 
    1. Two methods of communication in LANs are CSMA/CD and ... (1)
    2. When data cables are laid in the same channel as electric cables, ... interference can distort the signals. (1)
    3. Signals are transmitted either in analogue or ... format. (1)
    4. A network has a star or a ring or a ... topology. (1)
  2. The following table is an attempt to show the difference between a client/server and a peer-to-peer network. Copy the table. Fill in the answers.  Highlight the answers. 
    Server-based LAN Peer-to-peer LAN
    A. (Give an example of an operating system.) (1) Windows 98, Windows 2000 
    Every computer is either a server or a B. (1) Workstations are peers or equal.
    The server provides all the services.  Workstations C. (1) or D. (1) services 
  3. Transmission media are one of two types: guided or unguided.
    1. List ONE guided transmission media. (1)
    2. List ONE unguided transmission media. (1)
  4. What is the function of a modem?  Explain in detail. (2)
  5. User security is very important in any network. This is usually managed by allocating user rights and passwords. 
    1. Write down TWO recommendations in connection with passwords and their use. (2)
    2. Give TWO aspects in which the rights of users may differ. (2)
  6. Internet technology has now extended to the business world in the form of Intranets and Extranets.  Explain the terms Intranet and Extranet by explaining the difference between them. (2)
  7. User security is very important in any network. This is usually managed by allocating user rights and passwords. 
    1. Write down TWO recommendations in connection with passwords and their use. (2)
    2. Give TWO aspects in which the rights of users may differ. (2)
    3. Give TWO advantages of a computer network. (2)
  8. Networking ...
    1. List and briefly describe TWO of the main aims of a network by referring to suitable examples. (2)
    2. Explain what is meant by the term topology. (1)
    3. Name TWO functions of a network administrator. (2)
    4. List THREE network topologies. (3)
    5. Describe THREE mechanisms to protect a network against unauthorised access. (3)

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