Windows named pipes cannot be used over a network and do not support full duplex communication. The maximum speedup of an application with 15% serial and 85% parallel portions on a multicore processor is 15x. Communication between a user level task and kernel involves system calls, while communication between two user level tasks uses inter-process communication mechanisms. The code fragment shows a parent process creating three child processes (A, B, C) where A then creates child E, and C creates child F, depicted in a process tree diagram.

1. as soon as possible 2. a. Windows named pipe: i. Can't be used over the network ii. Can't be full
duplex iii. Needs parent child relationship for communication b. What is the maximum speed up
of an application with 15% serial and 85% parallel on a multicore iv. None of the above [1.5] c.
Explain communication between a user level task and kernel, and between two user level tasks
processor. [3.5] d. Write code fragment where parent process creates three child processes
(Assume A, B, C), one using Mach. process (assume A) creates one child process (assume E),
and the child process (assume C) creates one child processes (Assume F ). [At first draw the tree
of processes then write the code] 3. a. Message passing is difficult to implement in a distributed
system than shared memory. [1] i. True b. Data parallelism and task parallelism across multiple
cores are not mutually exclusive ii. False i. True ii. False c. How the race condition occurs in
producer-consumer paradigm? d. Explain how java executor framework can be used to return
value from one thread to another and also can be used not to return value from the child threads.
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