Q What is the difference between Swapping and Paging A Swapping Whole process is moved from the swap device to

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Previous Question: Q. What is IPC? What are the various schemes available? A. The term IPC (Inter-Process Communication) describes various ways by which different process running on some operating system communicate between each other. Various schemes available are as follows: Pipes: One-way communication scheme through which different process can communicate. The problem is that the two processes should have a common ancestor (parent-child relationship). However this problem was fixed with the introduction of named-pipes (FIFO). Message Queues : Message queues can be used between related and unrelated processes running on a machine. Shared Memory: This is the fastest of all IPC schemes. The memory to be shared is mapped into the address space of the processes (that are sharing). The speed achieved is attributed to the fact that there is no kernel involvement. But this scheme needs synchronization. Various forms of synchronisation are mutexes, condition-variables, read-write locks, record-locks, and semaphores. Next Question: Q. What is major difference between the Historic Unix and the new BSD release of Unix System V in terms of Memory Management? A. Historic Unix uses Swapping entire process is transferred to the main memory from the swap device, whereas the Unix System V uses Demand Paging only the part of the process is moved to the main memory. Historic Unix uses one Swap Device and Unix System V allow multiple Swap Devices

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Q. What is the difference between Swapping and Paging?

A.
Swapping-:
Whole process is moved from the swap device to the main memory for execution. Process size must be less than or equal to the available main memory. It is easier to implementation and overhead to the system. Swapping systems does not handle the memory more flexibly as compared to the paging systems.
Paging-:
Only the required memory pages are moved to main memory from the swap device for execution. Process size does not matter. Gives the concept of the virtual memory.
It provides greater flexibility in mapping the virtual address space into the physical memory of the machine. Allows more number of processes to fit in the main memory simultaneously. Allows the greater process size than the available physical memory. Demand paging systems handle the memory more flexibly.: Asked In UNIX MAN (10 years ago); Unsolved; Is this Puzzle helpful? (0) (0) Submit Your Solution

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Latest UNIX Aptitude Question SOLUTION: Q. What is the difference between Swapping and Paging? A. Swapping-: Whole process is moved from the swap device to the main memory for execution. Process size must be less than

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