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What are the hardware and software requirements for virtual memory?
The hardware required for virtual memory is a secondary memory and page table. The page table should have the ability to mark an entry as valid or invalid. The secondary memory is the one that holds the pages that are not present in the memory. It is generally a high speed disk and the section used is called swap space.
The main software requirement can be restart any instruction after a page fault occurs. If a page fault take place during instruction fetch the instruction is to be restarted moreover if it occurs during fetch of an operand then the instruction is to be fetched and decoded and then fetches the operand.
What are the five major activities of an operating system in regard to process management? The creation and deletion of both user and system processes The suspension and res
why we say " OS is a resource allocator" and “OS is a control program"?
What is a reference string? An algorithm is evaluated by running it on a particular string of memory references and computing the number of page faults. The string of memory re
what is deadlock
Q. Polling for an I/O completion is able to waste a large number of CPU cycles if the processor iterates a busy-waiting loop several times before the I/O completes. However if the
Several schemes available are as follows: Pipes : One-way communication process through which different process can interact. The problem is that the two processes could have
What does Verification represent? Verification shows the set of activities that are carried out to confirm that the software correctly executes the specific functionality.
How a virtual memory can be implemented? What are the benefits of using virtual memory?
The optimal replacement policy, called OPT, is to evict the page which will be accessed farthest into the future. Since we can't predict the future precisely, we can't implement OP
Question: A set of processes are in a deadlock state when every process in the set is waiting for an event that can be caused by only another process in the set. (a) There
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