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The key concept with ROM is that the system can READ this memory, but cannot(normally) write to this memory.
Read/write memory is memory that can be read and can be changed.
ROM
Yes you can do both. RAM stands for random access memory, that that means you can read it or write to it at random. That is different from ROM in which it is only made to be read, but not written to.To be technical, the user doesn't exactly write to RAM, but the CPU and/or the DMA controller does. In assembly code, a programmer asks the CPU to move data from memory to the CPU, or from the CPU to memory.
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Rom
Its a memory that can be read and changed
Random Access Memory is also known as the Main Memory or the Internal Memory.
read/write permissions/privileges allow the user to read, append and delete records from your database tables, however it cannot alter / create / drop the tables and its structures.Read/write privileges are ideal for forums and production websites that don't require creation or alteration of table structures on its normal operations.
ram
ROM is Read Only Memory. It holds the codes put there by the manufacture, and is used to start the loading of the Operating System.
read: moving data from file to memory write: moving data from memory to file