Jan 10, 2012 - What is the difference between Sequential and Random Access? A lower rate of throughput. The same is true for random writing. Difference Between Serial And Random Access Memory Album. 2/1/2018 0 Comments. By directly transferring data between memory and disk, DMA eliminates the need for the CPU to copy byte per byte, therefore allowing it to process other tasks while the data transfer occurs. • (FC) is a successor to parallel SCSI interface on enterprise market.
RAM stands for Random Access Memory. Computer memory chips on the mother board are random access. Disks drives are mostly random access, in that the head can shift to the location of the data to be read. The memory is slightly sequential in that the head must wait for the tracks to spin beneath it before it can read them. An example of sequential memory would be a tape drive. The tape must advance or rewind to the next location where data is stored. In a sequential file you must begin reading from the first record and continue reading until you find the data you seek (or until the end).
In a random access file you can specify the number or key of the record you wish to read or write. Random access tends to be much faster for this reason. 'RAM' is Random Access Memeory. It's the high speed memory that's on the motherboard and allows the computer to load instructions and data quickly into the processor during normal operation. 'Swap' space is an area on the computer disk that has been reserved as space for overflow. 
When there are too many applications CURRENTLY RUNNING or applications that are CURRENTLY RUNNING that are too large, large blocks of data are swapped into the swap space, freeing up some of the high speed memory. Typically, if the operating system is reasonably intelligent, data is only swapped to disk that is not currently being used.
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Excessive disk swapping will slow your computer dramatically. It's always a good idea to remove unnecessary applications from your startup. Your computer can have many applications on disk, as well as a lot of data. Only the CURRENTLY RUNNING applications can be impacted by swap space. There is none.
Computer memory is called RAM, which is an acronym for Random Access Memory. It's called 'random access' because data can be recalled from any memory location without having to search through all the data stored in front of it. Think of it like this: You can access any tune stored on your iPod at any time. You don't have to fast-forward through hundreds of tunes to get to the one you want, as you would have to do if your tunes were stored on a cassette tape.
The cassette-tape model is an example of sequential memory. ROM (read only memory): It is the part of memory in which the data or the software related to the hardware is stored which is not to be changed frequently. Athought the EPROM and EEPROM available now in the market have the ability to be changed easily. RAM (Random Access Memory): It is t he part of memory in which the data can be accesed fast and at random and the continuous movement of the storage is not necessary. Like CD and dvds.
It is fast but the volatile since the data stored in it is erased after the system is powered off. Cache memory: It is the part of memory in which the data from different intermediate calculations or processes is stored where the original data is expensive to fetch.
› › › Read-only memory, or ROM, is a form of data storage in computers and other electronic devices that can not be easily altered or reprogrammed. RAM is referred to as volatile memory and is lost when the power is turned off whereas ROM in non-volatile and the contents are retained even after the power is switched off. Random-access memory, or RAM, is a form of data storage that can be accessed randomly at any time, in any order and from any physical location in contrast to other storage devices, such as hard drives, where the physical location of the data determines the time taken to retrieve it.