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RANDOM ACCESS MEMORY
Wednesday, 10 April 2013, ϟ 0 shout(s)

RANDOM ACCESS MEMORY

Random access memory (RAM) ialah sejenis bentuk storan data komputer. RAM berkedudukan di dalam papan induk atau mother board.

 Kegunaan utama RAM adalah untuk menyimpan maklumat sementara digunakan oleh aplikasi yang sedang berjalan.RAM hanyalah ingatan sementara dan akan terpadam bila komputer ditutup. RAM digunakan kerana ingatan (memory) sementara tersebut boleh dicapai dangan kadar yang laju. Oleh itu, kapasiti dan kelajuan sesuatu RAM sangat mempengaruhi potensi sesebuah komputer.

A S C I I A R T
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L 29 A - L 32 E
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L29A

1. True
2. True
3. True
4. False
5. True
6. True
7. True
8. False
9. True
10. False

  1. Input
  2. Process
  3. Output
  4. Storage
      A. Data
      B. Information

L29E
  1. True
  2. True
  3. True
  4. True
  5. D
  6. B
  7. B
    8.  C
    9.  A
   10. D

L30A
  1. On and off
  2. Bit
  3. Analog
  4. Bytes
  5. Byte
  6. Binary digit
  7. 00111001
  8. Character
  9. True
  10. True
  11. American Standard Code for Information Interchange
  12. Extended Binary Coded Decimal Interchange Code
L30E

  1. True
  2. True
  3. True
  4. True
  5. D
  6. D
  7. B
     8. D
     9. C
   10. D

L31A & L31E
  1. A
  2. A
  3. B
  4. B
  5. B
  6. A
     7. B
     8. B
     9. A
   10. B

Step 1 = 3
Step 2 = 5
Step 3 = 1
Step 4 = 6
Step 5 = 2
Step 6 = 4

  1. True
  2. False
  3. True
  4. False
  5. True
  6. A
  7. A

  9. B
  10. A
L32A & L32E
1MB = 1.0 X 2[20]bytes
1TB = 1.0 X 2[40]bytes
1GB = 1.0 X 2[30]bytes
1KB = 1.0 X 2[10]bytes

  1. 1.8 bits
  2. 1.44MB
  3. 4.109

  1. Falase
  2. True
  3. True
  4. True
  5. True
  6. C
  7. A
     8. Binary
     9. 2[20] bytes
   10. GB( Gigabyte)





COMPUTER SYSTEM
Monday, 1 April 2013, ϟ 0 shout(s)

COMPUTER SYSTEM


A computer system is defined as combination of components designed to process data and store files. A computer system consists of:
  • input devices
  • output devices
  • processor
  • storage devices
A computer system requires hardware, software and a user to fully function.

COMPUTER HARDWARE

Input devices

An input device is any hardware device that sends data to the computer, without any input devices, a computer would only be a display device and not allow users to interact with it.
Examples of input devices:
                                                 
Processor

It allows the processing of numeric data, meaning information entered in binary form, and the execution of instructions stored in memory. 
Examples:
                                               
Output devices

An output device is any peripheral device that converts machine-readable information into people-readable form such as a monitor, printer, plotter and voice output device.
Examples:

                                                  
    Storage devices

    A storage device is a hardware device capable of holding information. There are two storage devices used in computers; a primary storage device such as computer RAM and a secondary storage device such as a computer harddrive. The secondary storage could be a removable, internal, or external storage.
    Examples:
                                                 
    Peripheral devices

    A peripheral is a device that is connected to a host computer, but not part of it. It is often, but not always partially or completely dependent on the host.



    SYSTEM SOFTWARE
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    SYSTEM SOFTWARE

     System software is a program that manages and supports the computer resources and operations of a computer system while it executes various tasks such as processing data and information, controlling hardware components, and allowing users to use application software. 

     Application programs usually require an operating system to function. 
    Examples of popular modern operating systems include:

    1. Linux
    2. UNIX
    3. Mac OSX
    4. DOS (Disk Operating System)
    5. Linker Software
    6.  BIOS Software 
    7. HD Sector Boot Software.
    Examples of application software:

    • Word processing
    • Graphics
    • Games
    • Databases
    • Spreadsheets
    • Communications

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