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Difference between Cache Memory and Virtual Memory
Cache Memory
Cache Memory is memory area which contains recently used data and it is used by CPU to increase speed. Whenever a program is to be executed, it is copied to cache memory and then CPU executes it. If it is already present, then program is executed.
Virtual Memory
Virtual Memory is a technique to increase the main memory capacity. It uses data swap technology and hard disk area is used as virtual memory.
Following are the important differences between Cache Memory and Virtual Memory.
| Sr. No. | Key | Cache Memory | Virtual Memory |
|---|---|---|---|
| 1 | Objective | Cache memory increase CPU access speed. | Virtual memory increase main memory capacity. |
| 2 | Memory Unit | Cache memory is a memory unit and is very fast to access. | Virtual memory is a technique and involes hard disk and is slower to access. |
| 3 | Management | CPU and related hardwares manages cache memory. | Operating System manages virtual memory. |
| 4 | Size | Cache memory is small in size. | Size of virtual memory is much larger than cache memory. |
| 5 | Operation | Cache memory keeps recently used data. | Virtual memory keeps the programs which are not getting accomodated in main memory. |
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