
A.
Mutex:
A mutex delivers mutual exclusion to either producer or consumer may have the mutex (that is key) and continue with their works. The consumer need to wait until the producer fill the buffer and vice versa.
Semaphore:
A semaphore is the generalized mutex. It split the buffer into identical resources. The producer and the consumer may work on different buffers at the same time.
B.
Mutex:
A mutex delivers mutual exclusion to either producer or consumer may have the mutex (that is key) and continue with their works. The consumer needs to wait until the producer fill the buffer and vice versa.
Semaphore:
A semaphore is the generalized mutex. It split the buffer into identical resources. The producer and the consumer may work on different buffers at the same time.
C.
Mutex:
A mutex delivers mutual exclusion to either producer or consumer may have the mutex (that is key) and continue with their works. The consumer need to wait until the producer fill the buffer and vice versa.
Semaphore:
A semaphore is the generalized mutex. It split the buffer into identical resources. The producer and the consumer may work on different buffers at the same time.

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