IBA

COMPUTER ASSIGNMENT #2

1.List the two main parts of the CPU and explain how they work.

1-Control Unit:

• The control unit directs the flow of data through the CPU, and to and from other devices.
• The control unit stores CPU's microcode, which contains the instructions for all the tasks the CPU can perform.

2. ALU:

• The actual manipulation of data takes place in ALU.
• The ALU can perform arithmetic and logic operations.
• The ALU connected to a set of registers-small memory aresa in the CPU, which hold data and program instructions while they are being processed

1.System Clock

• the system clock's tick set the pace of CPU.
• the system take to turn of and thn on a transistor.

2.RAM:

• the more amount of RAM a PC have the more amount of programe instruction & data it have in RAM which is faster to access thn storage.

3.BUS WIDTH

• the Bus width defines how many bits are going to travel at the samr time.

• CISC

• RISC

Reduced Instruction Set Coputers:
faster bcz hav less intructions to decode.

4.Describe the four characteristics you would consider when comparing monitors.

1. Size
2. Resolution
3. Refresh Rate
4. Dot Pitch

1-Size :

• its the diagonal measurment of the moniters screen.

2-Resolution:

• Resolution is the number of pixels on a screen, expressed as a matrix (600 x 800)
• The resolution is determined by the video controller
• Monitors can operate different resolutions
  640 x 480 Video Graphics Array (VGA)
  800 x 600 Super VGA (SVGA)
  1280 x 1024

3-Refresh Rate:

• Phosphor Dots refresh rate in zig zag pattren, from left to reight & right to left,
• Fast Scanning=faster refresh rate( less flickering)

4-Dot Pitch:

• Dot pitch is the distance between the phosphor dots that make up a pixel
• In colour monotors each pixel is made up of three dots
• The closer the dots the crisper the picture
  

• Passive Matrix – Uses a transitor for each row and each column of pixels
• Active Matrix – Uses a transistor for each pixel
• Thin Film Transistor Displays (TFT)

2-PLAZMA:

it uses gases as a display element.

• Image Quality – Measured in dots per inch (dpi)
• Speed – Measured in pages per minute (ppm) or characters per second (cps)
• Intial Cost – Printers vary in cost
• Cost Of Operation – This refers to the cost of supplies used by the printer
  

• Magnatic Storage:
  •Diskettes (floppy disks)
  •Hard Disks
  •High Capacity Floppy Disks
  •Disk Cartridges
  •Magnetic Tape
• Optical Storage:
  •Compact Disk Read-Only Memory (CD-ROM)
  •CD-Recordable (CD-R)/CD-ReWritable (CD-RW)
  •Digital Video Disk Read-Only Memory (DVD-ROM)
  •DVD Recordable (DVD-R)/DVD ReWritable (DVD-RW)
  •Photo CD

1. •Boot Sector – Stores the master boot record, a small program that runs when you first start (boot) the computer.
2. •File allocation Table (FAT) – a log that records each file’s allocation and each sectors status
3. •Root Folder – enables the user to store data on the disk in logical way
4. •Data Area – the portion of the disk that actually holds data
   

Notes :

• when ever u found any document from Adeel, do run spell check twice !
• this is just a draft, plz take ur time to modify it.
• Although the contributer is a computers engineer but is not very much in books rather lov to present his own theories, so use on ur own risk!
• if want to add anything ...plz use comments.... below ...