♠ RAM / ROM allows quicker access to data than HDD
♥ HDD or the Hard Disk Drive stores information for permanent storage/long term whereas RAM only stores information for relatively short-term usage
♣ Data in RAM is deleted once the power to the device is stopped
♦ RAM stores active program data whereas ROM is unable to
♠ RAM stores data that the user is currently working on whereas ROM is unable to
♥ Large RAM chips can be read faster than most ROMs ...
♣ ROM content is sometimes copied to RAM and subsequently read from RAM
♦Hard disks can be portable and easy to move from device to device unlike ROM/RAM
♠ Data in RAM can be accessed much faster than the data on a hard disk
♥ Hard disk drives are electromechanical devices and more prone to failure than RAM/ROM – no moving parts
♣ In a normal computer configuration RAM size is much smaller than the hard disk size
♦ ROM cannot be changed by a program or user
♠ ROM/HDD retains its data even after the computer is turned off
♥ ROM stores the instructions for the computer to start up when it is turned on again
♣ Would be expensive to save an operating system on ROM so need hard disk
♦ Still need to have boot up instructions to activate hard disk drive so ROM is
needed.
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