What is a Computer Memory?
A computer memory is nothing but a power or capability to store data and then reproduce or delivery or retrieve the stored data when necessary.
Example: Hard disk, RAM, ROM, CD, DVD, Pen drive etc.
Question: Why RAM is called the Main memory?
Answer: RAM is a very much essential memory. During the execution of a program, there is a close interaction in between RAM and processor. In the execution of the program, the processor takes data and instruction from RAM. After processing, RAM stores information. For this important role, RAM is called the main memory.
Question: Why RAM is called a Volatile memory?
Answer: RAM holds its contents (data) as long as power or electricity is available. When the power is interrupted or shut down, the contents of RAM is lost. This is why, RAM is called a volatile memory. On the other hand, non-volatile memory does not loss its contents when the electricity is turned off.
RAM – Random Access Memory
SRAM – Static Random Access Memory
DRAM – Dynamic Random Access Memory
RDRAM – Rambus Dynamic Random Access Memory
SDRAM – Sequential Dynamic Random Access Memory
ROM – Read Only Memory
MROM – Masked Read Only Memory
PROM – Programmable Read Only Memory
EPROM – Erasable Programmable Read Only Memory
EEPROM – Electrically Erasable Programmable Read Only Memory
CD – Compact Disk
DVD – Digital Versatile Disk
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