The primary storage is referred to as random access memory (RAM) because
it is possible to randomly select and use any location of the memory
directly for storing and retrieving data. It takes same time to reach
any address of the memory whether it is in the beginning or in the last.
It is also called read/write memory. The storage of data and instructions inside the primary storage is temporary. It disappears from
RAM as soon as the power to the computer is switched off. The memory,
which loose its contents on failure of power supply, are known as
volatile memories. So now we can say that RAM is volatile memory.
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