Question: 1. If each process in a communicator call MPI_Reduce twice. That is, two reduction operations one after the other. Can some of the processes finish

1. If each process in a communicator call MPI_Reduce twice. That is, two reduction operations one after the other. Can some of the processes finish the first reduction operation and move to the next one before the other processes finish theirs? Justify.

2. Why do MPI processes not suffer from cache coherence overhead?

3. Do Reduction operations in MPI take care of critical sections on the programmers behalf? Justify

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