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Sunday 6 November 2011

Describe the memory units for memory measurement?

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Memory Unit:- The smallest element of data is called binary digit. Its also called BITS.
The BIT can have a value of 0 (OFF) and 1 (ON).
 
Memory Unit
1 Byte  8 Bits
1 Kilo Byte  1024 Bytes
1 Mega Byte  1024  KB
1 Gega Byte  1024 MB
1 Tera Byte  1024 GB
1 Peta Byte  1024 TB
 

What is Memory? How many types of memory we use in a computer? Describe.

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Memory: Memory is something which a computer need for data processing as well as future references.
Computer Memory - RAM
There are two types of memory:
1. Primary Memory
2. Secondary Memory
Primary Memory
Its stores all the data temporarily. If computer gets shutdown, all the data get lost.
It is also called volatile memory.
Example: RAM, ROM.
RAM :- Random Access Memory.
ROM :- Read Only Memory.
 

 Secondary Memory  

Its stores all the data permanently. It is also called versatile memory.
Example: Hard Disk, Floppy Disk, CD, DVD.