what is main memory


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what is primary memory
asked Jun 14, 2012 in Computer Questions by anonymous
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Refers to physical memory that is internal to the computer. The word main is used to distinguish it from external mass storage devices such as disk drives. Another term for main memory is RAM.

The computer can manipulate only data that is in main memory. Therefore, every program you execute and every file you access must be copied from astorage device into main memory. The amount of main memory on a computer is crucial because it determines how many programs can be executed at one time and how much data can be readily available to a program.

Because computers often have too little main memory to hold all the data they need, computer engineers invented a technique called swapping, in which portions of data are copied into main memory as they are needed. Swapping occurs when there is no room in memory for needed data. When one portion of data is copied into memory, an equal-sized portion is copied (swapped) out to make room.

answered Jun 19, 2012 by pavi Moderator (259,500 points)
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RANDOM ACCESS MEMORY (RAM)
answered Oct 2, 2012 by skygirl Moderator (63,000 points)

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