Describe the three techniques used for communicating data in a local procedure call.What different settings are most conducive for the application of the different message passing techniques?
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Answer:Data is communicated using one of the following three facilities:1)messages are simply copied from one process to the other,2）a shared memory segment is created and messages simply contain a pointer into the shared memory segment,thereby avoiding copies
between processes,3)a process directly writes into the other process's virtual space.