ROYAL INSTITUTE OF ROYAL INSTITUTE OF BUSINESS AND BUSINESS AND TECHNICAL EDUCATIONTECHNICAL EDUCATION

REPAIR COURSE WORKREPAIR COURSE WORK

NAMENAME :: ISABIRYE AGGREY ISABIRYE AGGREY

COURSE UNITCOURSE UNIT :: REPAIRREPAIR

COURSECOURSE :: COMPUTER SCIENCECOMPUTER SCIENCE

LEVELLEVEL :: DIPLOMA LEVELDIPLOMA LEVEL

YEARYEAR :: 11stst YEAR 2 YEAR 2ndnd QUARTER QUARTER

EMAILEMAIL :: aggrey.isabirye@yahoo.comaggrey.isabirye@yahoo.com

LECTURERLECTURER :: NAMAZZI AGIENAMAZZI AGIE

QUESTIONSQUESTIONS1.Using examples and diagrams where 1.Using examples and diagrams where

necessary, write short notes on the necessary, write short notes on the following:following:

i)i) Computer mother board.Computer mother board.ii)ii) Bios Bios iii)iii) Floppy interface cableFloppy interface cableiv)iv) ProcessorProcessorv)v) USB portsUSB portsvi)vi) Hard disk driveHard disk drive

2. Compare and contrast the following.2. Compare and contrast the following.i)i) DRAM,SRAM,SDRAM & RDRAM.DRAM,SRAM,SDRAM & RDRAM.ii)ii) CD-R &DVD-RWCD-R &DVD-RWiii)iii) Serial port & parallel port.Serial port & parallel port.iv)iv) Partitioning & formattingPartitioning & formattingv)v) Graphics, sounds, networking & USB cards.Graphics, sounds, networking & USB cards.3. Viruses are major headache to computer 3. Viruses are major headache to computer

technicians world wide. Describe how pc’s technicians world wide. Describe how pc’s get infected by viruses. explain how you get infected by viruses. explain how you can prevent viruses from attacking pc’scan prevent viruses from attacking pc’s

In case the pc is already infected. Describe how In case the pc is already infected. Describe how You can completely get rid of the viruses.You can completely get rid of the viruses.

4.Francis has a problem with his computer, explain the cause of each of these problems listed below and outline the steps you take to electrify each problem.The system unit is beeping (making sound).NTF file is missing.Displaying pop messages.Red light in the system unitBios password.

SOLUTIONSSOLUTIONS1.i)Co1.i)Computer mother boardmputer mother boardIs the circuit board or logic board in a Is the circuit board or logic board in a

computer which provides a way for a computer which provides a way for a computer to connect, communicate computer to connect, communicate & work together. Like cpu as the & work together. Like cpu as the central processing unit, hard drive, central processing unit, hard drive, optical drive, network, video and optical drive, network, video and sound card e.t.c. sound card e.t.c.

ii) Bios as basic input and output system.ii) Bios as basic input and output system.Is a program in the personal computer ‘s Is a program in the personal computer ‘s

microprocessor uses to get the computer microprocessor uses to get the computer system started after you turn it off. It system started after you turn it off. It manages the data flow between computer’s manages the data flow between computer’s operating system and attached devices like operating system and attached devices like hard disk drive, video adapter, mouse and hard disk drive, video adapter, mouse and key board.key board.

iii) Floppy interface cable.iii) Floppy interface cable.Is a computer cable with 34 wires, it connects Is a computer cable with 34 wires, it connects

the mother board’s FDD which is a floppy the mother board’s FDD which is a floppy disk drive interface with one or two floppy disk drive interface with one or two floppy disk drive.disk drive.

iv) processor.iv) processor.Is a computer hardware that carries out the Is a computer hardware that carries out the

instructions of a computer program by instructions of a computer program by performing the basic arithmetical and performing the basic arithmetical and logical input and output operations of the logical input and output operations of the system.system.

v) USB port (universal serial bus) is an v) USB port (universal serial bus) is an external standard interface that supports external standard interface that supports data transfer and connection of peripheral data transfer and connection of peripheral devices like devices like

mouse, keyboard, printer to the computermouse, keyboard, printer to the computer

iv) Hard disk drive. Is the main data storage iv) Hard disk drive. Is the main data storage device used for storing,retrieving digital device used for storing,retrieving digital information like operating system files and it information like operating system files and it is represented by letter c.is represented by letter c.

2.2.i)i) DRAM,SRAM,SDRAM & RDRAM.DRAM,SRAM,SDRAM & RDRAM.Dram (dynamic access memory) is a type Dram (dynamic access memory) is a type

of random access memory that store of random access memory that store each bit of data in a circuit, Sram(static each bit of data in a circuit, Sram(static random access memory) is a type of a random access memory) is a type of a semiconductor memory that uses semiconductor memory that uses bistale latching circuitry to stormice bistale latching circuitry to stormice each bit,Sdram(sychronous random each bit,Sdram(sychronous random access memory) is a dynamic random access memory) is a dynamic random access memory that can run much access memory that can run much higher clock speed than convectional higher clock speed than convectional memory, memory,

Rdram(rambus dynamic random access Rdram(rambus dynamic random access memory) is a type of synchronous random memory) is a type of synchronous random access memory that transfer 1.6 billion access memory that transfer 1.6 billion bytes per second implying that all are bytes per second implying that all are random access memory storing data in a random access memory storing data in a computer.computer.

ii) CD-R &DVD-RWii) CD-R &DVD-RWCD-R is a compact disc recordable while as CD-R is a compact disc recordable while as

DVD-RW is digital video display rewritable DVD-RW is digital video display rewritable implying that it can be erased and new implying that it can be erased and new writings wrote on it in that all are storage writings wrote on it in that all are storage medias circular in shapemedias circular in shape

iii) Serial port & parallel port.iii) Serial port & parallel port.Is a serial socket or a communication Is a serial socket or a communication

physical interface through which physical interface through which information transfers in and out one bit information transfers in and out one bit a time, it converts data from parallel to a time, it converts data from parallel to serial and changes electric serial and changes electric presentation of data while as parallel presentation of data while as parallel port is a socket used for connecting port is a socket used for connecting devices like peripherals for example devices like peripherals for example printer and keyboard that send and printer and keyboard that send and receive data thus all are physical receive data thus all are physical interface that send and receive data interface that send and receive data through communication.through communication.

iv) Partitioning and formattingiv) Partitioning and formattingPartitioning is the making of the data storage Partitioning is the making of the data storage

devices visible to an operating system devices visible to an operating system while as formatting is a process of the while as formatting is a process of the preparing data storage devices like the preparing data storage devices like the hard disk drive implying that both are hard disk drive implying that both are processes carried on the hard disk.processes carried on the hard disk.

v) Graphics sound, networking & sound card.v) Graphics sound, networking & sound card.Graphics are visual images, contrasted with Graphics are visual images, contrasted with

text produced by computer processing text produced by computer processing displayed on the screen or are stored as displayed on the screen or are stored as data and come in two flavors of raster and data and come in two flavors of raster and victor graphics,victor graphics,

Sound is a continuous vibration that travels Sound is a continuous vibration that travels through any medium and reach the receiver through any medium and reach the receiver as ones ear, networking is a series of as ones ear, networking is a series of nodes which is designed to help people in nodes which is designed to help people in communicating for example exchanging of communicating for example exchanging of messages.messages.

3. How pc’s infected by the virus.3. How pc’s infected by the virus.Pc get infected by the virus through inserting Pc get infected by the virus through inserting

infected universal serial bus and flash card infected universal serial bus and flash card into the computer.into the computer.

Through using unsecured websites while on Through using unsecured websites while on the internetthe internet

Through downloading files onto the PC.Through downloading files onto the PC.Through unlimited installing of programmes Through unlimited installing of programmes

by the multiple users of the PC.by the multiple users of the PC.Through downloading attachments from Through downloading attachments from

unknown contacts to your Email.unknown contacts to your Email.Accepting without reading the prompts that Accepting without reading the prompts that

appears on the screen by the user.appears on the screen by the user.Not running the latest updatesNot running the latest updatesPirating music, software where you download Pirating music, software where you download

them as free ware from the internet.them as free ware from the internet.Having no antivirus or spy ware scannerHaving no antivirus or spy ware scanner

How can I prevent viruses from infecting How can I prevent viruses from infecting pcs.pcs.

By installing deep freezer in the pc.By installing deep freezer in the pc.By using antivirus and spyware that are By using antivirus and spyware that are

updated.updated.Limiting the installation activity of Limiting the installation activity of

different users to the pc by having different users to the pc by having USB security programs to scan and USB security programs to scan and protect viruses attacking the pc.protect viruses attacking the pc.

Through reading the message prompt Through reading the message prompt that appear on the screen that appear on the screen

By not downloading attachments to our By not downloading attachments to our email to unknown contacts.email to unknown contacts.

By limiting programme installation to By limiting programme installation to the pc by different users.the pc by different users.

How you can you completely get How you can you completely get rid of the viruses incase the PC is rid of the viruses incase the PC is already infectedalready infected..

By scan the computer using antivirus.By scan the computer using antivirus.By installing new operating system on By installing new operating system on

your PC.your PC.By using deep freezers.By using deep freezers.Reinstalling your applications on your PCReinstalling your applications on your PC

Run a complete antivirus scan to clean the backup.Remove your hard disk and connect it as guest

disk in a different (clean) computer to run a clean scan.

Boot from CD (compact disc) with its own set of tools running its own kernel.

Keep your system patched by promptingly installing windows updates and other softwares.

By not running as administrator by default.By using good firewall tools. 

4. Causes of each of the problems listed 4. Causes of each of the problems listed below and outlined steps to electrify below and outlined steps to electrify each problem. each problem.

The system unit is beeping (making The system unit is beeping (making sound)sound)

System errors and they can be electrified by System errors and they can be electrified by restarting the computer or reinstalling the restarting the computer or reinstalling the operating system.operating system.

A failed keyboard to start and can be A failed keyboard to start and can be electrified by reconnecting the keyboard, electrified by reconnecting the keyboard, checking its cable on its port.checking its cable on its port.

Improper system unit connection and can be Improper system unit connection and can be electrified by reconnecting the system unit.electrified by reconnecting the system unit.

NTF file is missingNTF file is missingCorrupt operating system file or Corrupt operating system file or

missing file and can be electrified by missing file and can be electrified by reinstalling the operating system and reinstalling the operating system and using recovery tools.using recovery tools.

Improper switching off or abrupt power Improper switching off or abrupt power cut off and can be electrified by cut off and can be electrified by restating the computer and selecting restating the computer and selecting the Start ‘Windows normally’ to start. the Start ‘Windows normally’ to start.

Displaying popup messagesDisplaying popup messages..Suspected virus by a spyware or Suspected virus by a spyware or

antivirus and can be electrified by antivirus and can be electrified by Scanning the computerScanning the computer

Windows update or activation of popup Windows update or activation of popup messages and display them.messages and display them.

Complete download and installing popup Complete download and installing popup message and can be electrified by opening message and can be electrified by opening the downloads and checking the installed the downloads and checking the installed programme for the soft ware.programme for the soft ware.

Red light in the system unit.Red light in the system unit.Improper random access memoryImproper random access memoryConnection into the random access chips Connection into the random access chips

and can be electrified reconnecting the and can be electrified reconnecting the randon access memory into the random randon access memory into the random access chips.access chips.

Bios passwordBios passwordBlocking boot up and can be electrified Blocking boot up and can be electrified

by resetting the password on your pc.by resetting the password on your pc.In working tangle networks and can be In working tangle networks and can be

electrified by pressing the password electrified by pressing the password on your pc.on your pc.

RefereesRefereeswww.about.comwww.webcrawler.comhttp\:En.wikipedia.com