Memory system of a computer consists of primary and secondary memory units. Primary Memory Primary memory unit is used to store data ,instructions, and information before,during and after processing by Arithmetic Logic Unit(ALU) .It is actually a work area (physically,a collection of integrated circuits) within the computer ,where the CPU stores the data and instructions .It is mainly of the following three type s. 1.Read Only Memory(ROM) 2.Random Access Memory (RAM) 3.Complementary Metal -Oxide-Semiconductor(CMOS ) Read Only Memory(ROM) Read only memory is an essential component of the memory unit.We know that the computer ,being a machine ,itself has no intelligence or memory and requires instructions ,which are given by us.Whenever the computer is switched on ,it searches for the required instructions .The memory is permanent and is not erased when the system is switched off .So,ROM is ...
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