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Memory consists of RAM, ROM and processor cache.
RAM (Random Access Memory)
It provides random selection and usage of memory location to store and retrieve data.
ROM (Read Only Memory)
A read only memory (ROM) is one in which information is permanently stored.
Processor cache is used for speeding up the data supply to CPU. It stores the most frequently used data.
Storage Devices - It is an important unit of computer and is of types primary and secondary memory.
Primary Storage Devices - They consists of cache, processor register ROM & RAM.
Secondary Storage Devices - They consists of magnetic tape, disk drives (like hard disk drive, etc.), flash memory