Read the next MPI code and determine whether deadlock will occur. If not, explain; if so, explain and fix it. double other_data ; if ( rank==0 | | rank==2) { MPI_Ssend( &own_data , 1 , MPI_DOUBLE , 3 , tag , MPI_COMM_WORLD ) ; MPI_Recv(&other_data , 1 , MPI_DOUBLE , 1 , tag , MPI_COMM_WORLD ,&status ) ; } elseif ( rank==1 ) { MPI_Ssend(&own_data , 1 , MPI_DOUBLE , 0 , tag , MPI_COMM_WORLD ) ; MPI_Ssend(&other_data , 1 , MPI_DOUBLE , 2 , tag , MPI_COMM_WORLD ) ; } elseif ( rank==3 ) { MPI_Recv(&own_data , 1 , MPI_DOUBLE , 0 , tag , MPI_COMM_WORLD ,&status ) ; MPI_Recv(&other_data , 1 , MPI_DOUBLE , 2 , tag , MPI_COMM_WORLD ,&status ) ; } Here as usual rank is the processor id, and we assume somewhere in the program before the displayed code, the variable own data is already initialized.