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Implement a system of three concurrent processes which read and write sequence numbers to a file. Each of the three processes must obtain 200 integers from the file. The file only holds one integer at a given time. Given a file, F, containing a single integer, each process must perform the following steps: Please show steps and answer. 1. Open F 2. Read an integer N from the file 3. Close F 4. Output N and the process ID (PID) (either on the screen or an output file) 5. Increment N by 1 6. Open F 7. Write N to F (overwriting the current value in F) 8. Close F Will the numbers that are read by the processes always be unique? Or do you observe duplicates of numbers being obtained by different processes? That is, does a particular integer N appear in the output of more than one process? Rewrite your implementation of these 3 processes to guarantee that no duplicate numbers are ever obtained by the processes. In other words, each time the file is read by any process, that process reads a distinct integer. The processes must run concurrently. Briefly describe why the code sequence above can lead to duplication of integer values and discuss how your solution will avoid these duplicates.

Implement a system of three concurrent processes which read and write sequence numbers to a file. Each of the three processes must obtain 200 integers from the file. The file only holds one integer at a given time. Given a file, F, containing a single integer, each process must perform the following steps: Please show steps and answer. 1. Open F 2. Read an integer N from the file 3. Close F 4. Output N and the process ID (PID) (either on the screen or an output file) 5. Increment N by 1 6. Open F 7. Write N to F (overwriting the current value in F) 8. Close F Will the numbers that are read by the processes always be unique? Or do you observe duplicates of numbers being obtained by different processes? That is, does a particular integer N appear in the output of more than one process? Rewrite your implementation of these 3 processes to guarantee that no duplicate numbers are ever obtained by the processes. In other words, each time the file is read by any process, that process reads a distinct integer. The processes must run concurrently. Briefly describe why the code sequence above can lead to duplication of integer values and discuss how your solution will avoid these duplicates.

EBK JAVA PROGRAMMING
EBK JAVA PROGRAMMING
9th Edition
ISBN:9781337671385
Author:FARRELL
Publisher:FARRELL
Chapter13: File Input And Output
Section: Chapter Questions
Problem 13RQ
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Implement a system of three concurrent processes which read and write sequence numbers to a file. Each of the three processes must obtain 200 integers from the file. The file only holds one integer at a given time. Given a file, F, containing a single integer, each process must perform the following steps: Please show steps and answer. 1. Open F 2. Read an integer N from the file 3. Close F 4. Output N and the process ID (PID) (either on the screen or an output file) 5. Increment N by 1 6. Open F 7. Write N to F (overwriting the current value in F) 8. Close F Will the numbers that are read by the processes always be unique? Or do you observe duplicates of numbers being obtained by different processes? That is, does a particular integer N appear in the output of more than one process? Rewrite your implementation of these 3 processes to guarantee that no duplicate numbers are ever obtained by the processes. In other words, each time the file is read by any process, that process reads a distinct integer. The processes must run concurrently. Briefly describe why the code sequence above can lead to duplication of integer values and discuss how your solution will avoid these duplicates.
Transcribed Image Text:Implement a system of three concurrent processes which read and write sequence numbers to a file. Each of the three processes must obtain 200 integers from the file. The file only holds one integer at a given time. Given a file, F, containing a single integer, each process must perform the following steps: Please show steps and answer. 1. Open F 2. Read an integer N from the file 3. Close F 4. Output N and the process ID (PID) (either on the screen or an output file) 5. Increment N by 1 6. Open F 7. Write N to F (overwriting the current value in F) 8. Close F Will the numbers that are read by the processes always be unique? Or do you observe duplicates of numbers being obtained by different processes? That is, does a particular integer N appear in the output of more than one process? Rewrite your implementation of these 3 processes to guarantee that no duplicate numbers are ever obtained by the processes. In other words, each time the file is read by any process, that process reads a distinct integer. The processes must run concurrently. Briefly describe why the code sequence above can lead to duplication of integer values and discuss how your solution will avoid these duplicates.
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