Long description

Part (a): There is a vertical block labeled Machine 1 with four partitions Application, Run-time system, Operating system, and Hardware from top to bottom. Similarly, on the right, Machine 2 is placed. A true multiprocessor with physical shared memory implemented by the hardware and shown by highlighting the two horizontal lines between machine 1 and machine 2 at the top of the hardware partition of both machines. Part (b): The structure of machines 1 and 2 are the same as in part (a). The shared memory is implemented by the operating system. Part (c): The structure of machines 1 and 2 are the same as in part (a). The shared memory is implemented by the Run-time system.