what is RAM and ROM ?

what is RAM and ROM ?

                                                            RAM the term RAM stand for random access memory, meaning that any memory word i... 07:41

                                                            RAM
the term RAM stand for random access memory, meaning that any memory word is easily accessible as any other. when the term RAM is used with semiconductor memories it is usually taken to mean READ/WRITE memory as opposed ROM.

RAMS are used in computer for the storage of active programs and data. the consent of RAM change continually as the computer executes a program. the requires first READ and WRITE operation for the RAM so as not to slow down the computer operation.

the major disadvantage of RAM is that it is volatile and will lose all stored information if power is turned off.

RAM plays Avery important role in the processing speed  of the computer. large RAM size provides large amount of information to a computer for processing and hence increases the processing speed.
                                                ROM
the term ROM stands for red only memory. the type of semiconductor memory is designed to hold information that is either permanent or will not change frequently. during normal operation, no new data can be written into a ROM, but data can be read from ROM. for some ROM's, the data can be entered during the manufacturing process; for the ROM's, the data can be entered electrically. the process of entering data is called programming the ROM. some ROM's connect have their data changed once they have been programmed; others can be erased and programmed as often as required by the manufacturing. ROM's are used to store programs that are frequently required and are not to change during the operation  of the computer. because all ROM's are volition, these programs are not lost when the computer is turned off. once of the main function of program stored in ROM is to make the computer ready for operation.


their are primarily three types of read-only memory. ROM refers to IC chips that are marked or programmed by the manufacturing.a PROM is a semiconductor chip that is obtained from the manufacturing in an unprogrammed state and the user programs it according to his desire. a PROM is programmed outside of the circuit where it is to be used and many commercially available machines, called PROM PROGRAMMER are used to program it.