software as a service software as a service is an interesting one you may use it for your core business functions or you may use something which is a mix of saas paas in one to build applications on too
What is Virtual Memory. Virtual memory is a component of most operating systems, such as MAC OS, Windows and Linux. Virtual memory has a very important role in the operating system. It allows us to run more applications on the system than we have enough physical memory to support. Virtual memory is simulated memory that is written to a file on the hard drive. That file is often called page file or swap file.
October 31, 2012. Virtual memory decouples the virtual address space that the programmer and the processor sees from the physical address space of the actual RAM memory. For each process, a mapping is maintained between virtual addresses to physical addressed, and every memory access must pass through this map.