Virtual memory is an old concept; before computers had caches, they had virtual
ID: 3685576 • Letter: V
Question
Virtual memory is an old concept; before computers had caches, they had virtual memory. For a long time, virtual memory only appeared on mainframes. Personal computers in the 1980s did not use virtual memory. In fact, many good ideas that were in common use in the UNIX operating systems didn't appear in personal computer operating systems until the mid-1990s.
Initially, virtual memory meant the idea of using disk to extend RAM. Programs wouldn't have to care whether the memory was "real" memory (i.e., RAM) or disk. Later on, virtual memory was used as a means of memory protection. Every program uses a range of addresses called the address space.
Discuss the advantages of virtual memory. Identify some real-life applications of virtual memory and discuss why virtual memory would be beneficial in those situations.
Explanation / Answer
Answer:
Long back, virtual memory were used to load and execute the process that is bigger than the avilable memory. Process used to break in parts and load on the memory avilable. But now a days Virtual Memory is used very often . Virtual memory provide the degree of multi programming. Degree of multi programming is the number of processes loaded on the main memory and thus increases the CPU efficency. Virtual memory eliminates external fragmentation.
Th real life application of virtual memory is gamming. In gamming virtual memory is used. As we can observe the degree of multi programming in gamming and the multi programming provided by the virtual memory only. Another application of virtual memory is Vmare in our PCs. I am using Kali Linux on window 7 Ultimate . This is the stunning application of virtual memory. Both windows and linux are run simultaneously all because of virtual memory. Thus virtual memory concept changed the way of computer sciences.It gonna come with alot features in near future.
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