Computer Systems: A Programmer's Perspective (3rd Edition)
Computer Systems: A Programmer's Perspective (3rd Edition)
3rd Edition
ISBN: 9780134092669
Author: Bryant, Randal E. Bryant, David R. O'Hallaron, David R., Randal E.; O'Hallaron, Bryant/O'hallaron
Publisher: PEARSON
Question
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Chapter 12.5, Problem 12.9PP

A.

Program Plan Intro

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.

Program Plan Intro

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.

Program Plan Intro

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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Problem #2: [35 pts] Parity Bit CheckerThe parity bit of a sequence of bits is 0 if the number of 1’s in the sequence is even and 1otherwise.Example: if the sequence of bits is 1 1 0 1, the parity bit should be 1 (total number of 1-bits is 3 whichis odd) if the sequence of bits is 1 0 1 0, the parity bit should be 0 (total number of 1-bits is 2 whichis even)Write a Java program that asks the user to enter the number of bits he has. The program thenreads the bits as separate integers. In the end, the program prints the parity bit on the screen. Ifthe use enters a bit value that is neither 0 nor 1, the entry should be discarded and a messagedisplayed as shown in the sample run.Sample run 1:How many bits do you have? 6Enter 6 bits: 1 1 0 0 1 0The parity bit is 1Sample run 2:How many bits do you have? 8Enter 8 bits: 1 1 1 0 0 0 0 1The parity bit is 0Sample run 3:How many bits do you have? 5Enter 5 bits: 1 1 3 0 1Incorrect bit value 3 is discarded.The parity bit is 1       java brogram
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