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The semaphore variables full, empty and mutex are initialized to 0, n and 1, respectively. Process P1 repeatedly adds one item at a time to a buffer of size n, and process P2 repeatedly removes one item at a time from the same buffer using the programs given below. In the programs, K, L, M and N are unspecified statements.
P1
while (1) { K; P(mutex); Add an item to the buffer; V(mutex); L; } P2 while (1) { M; P(mutex); Remove an item from the buffer; V(mutex); N; } The statements K, L, M and N are respectively
- a)P(full), V(empty), P(full), V(empty)
- b)P(full), V(empty), P(empty), V(full)
- c)P(empty), V(full), P(empty), V(full)
- d)P(empty), V(full), P(full), V(empty)
Correct answer is option 'D'. Can you explain this answer?
Verified Answer
The semaphore variables full, empty and mutex are initialized to 0, n ...
Process P1 is the producer and process P2 is the consumer.
Semaphore ‘full’ is initialized to '0'. This means there is no item in the buffer. Semaphore ‘empty’ is initialized to 'n'. This means there is space for n items in the buffer.
In process P1, wait on semaphore 'empty' signifies that if there is no space in buffer then P1 can not produce more items. Signal on semaphore 'full' is to signify that one item has been added to the buffer.
In process P2, wait on semaphore 'full' signifies that if the buffer is empty then consumer can’t not consume any item. Signal on semaphore 'empty' increments a space in the buffer after consumption of an item.
Thus, option (D) is correct.
Please comment below if you find anything wrong in the above post.
Semaphore ‘full’ is initialized to '0'. This means there is no item in the buffer. Semaphore ‘empty’ is initialized to 'n'. This means there is space for n items in the buffer.
In process P1, wait on semaphore 'empty' signifies that if there is no space in buffer then P1 can not produce more items. Signal on semaphore 'full' is to signify that one item has been added to the buffer.
In process P2, wait on semaphore 'full' signifies that if the buffer is empty then consumer can’t not consume any item. Signal on semaphore 'empty' increments a space in the buffer after consumption of an item.
Thus, option (D) is correct.
Please comment below if you find anything wrong in the above post.
Most Upvoted Answer
The semaphore variables full, empty and mutex are initialized to 0, n ...
Explanation:
The given programs represent the producer-consumer problem, where P1 is the producer process and P2 is the consumer process. The buffer is a shared resource between the two processes.
Initial Values:
- full: This is initialized to 0, indicating that the buffer is initially empty.
- empty: This is initialized to n, indicating that the buffer has n empty slots.
- mutex: This is initialized to 1, indicating that it is initially available.
Process P1 (Producer):
1. K: This represents any code before acquiring the mutex.
2. P(mutex): This acquires the mutex, ensuring exclusive access to the buffer.
3. Add an item to the buffer: This represents the code to add an item to the buffer. Since the buffer has limited size n, this operation may block if the buffer is full.
4. V(mutex): This releases the mutex, allowing other processes to access the buffer.
5. L: This represents any code after releasing the mutex.
Process P2 (Consumer):
1. M: This represents any code before acquiring the mutex.
2. P(mutex): This acquires the mutex, ensuring exclusive access to the buffer.
3. Remove an item from the buffer: This represents the code to remove an item from the buffer. Since the buffer may be empty, this operation may block if the buffer is empty.
4. V(mutex): This releases the mutex, allowing other processes to access the buffer.
5. N: This represents any code after releasing the mutex.
Explanation of Correct Answer (Option D):
- The semaphore variables are used to synchronize access to the buffer.
- The mutex semaphore ensures that only one process can access the buffer at a time.
- The full semaphore represents the number of filled slots in the buffer, while the empty semaphore represents the number of empty slots in the buffer.
- P(full) and V(empty) are used to synchronize the producer process P1.
- P(empty) and V(full) are used to synchronize the consumer process P2.
- Option D (P(empty), V(full), P(full), V(empty)) correctly represents the synchronization operations required for the producer-consumer problem.
- P(empty) is used by the consumer process P2 to wait if the buffer is empty.
- V(full) is used by the producer process P1 to signal that a slot in the buffer is filled.
- P(full) is used by the producer process P1 to wait if the buffer is full.
- V(empty) is used by the consumer process P2 to signal that a slot in the buffer is emptied.
- This combination ensures that the producer and consumer processes synchronize correctly and avoid buffer underflow or overflow conditions.
The given programs represent the producer-consumer problem, where P1 is the producer process and P2 is the consumer process. The buffer is a shared resource between the two processes.
Initial Values:
- full: This is initialized to 0, indicating that the buffer is initially empty.
- empty: This is initialized to n, indicating that the buffer has n empty slots.
- mutex: This is initialized to 1, indicating that it is initially available.
Process P1 (Producer):
1. K: This represents any code before acquiring the mutex.
2. P(mutex): This acquires the mutex, ensuring exclusive access to the buffer.
3. Add an item to the buffer: This represents the code to add an item to the buffer. Since the buffer has limited size n, this operation may block if the buffer is full.
4. V(mutex): This releases the mutex, allowing other processes to access the buffer.
5. L: This represents any code after releasing the mutex.
Process P2 (Consumer):
1. M: This represents any code before acquiring the mutex.
2. P(mutex): This acquires the mutex, ensuring exclusive access to the buffer.
3. Remove an item from the buffer: This represents the code to remove an item from the buffer. Since the buffer may be empty, this operation may block if the buffer is empty.
4. V(mutex): This releases the mutex, allowing other processes to access the buffer.
5. N: This represents any code after releasing the mutex.
Explanation of Correct Answer (Option D):
- The semaphore variables are used to synchronize access to the buffer.
- The mutex semaphore ensures that only one process can access the buffer at a time.
- The full semaphore represents the number of filled slots in the buffer, while the empty semaphore represents the number of empty slots in the buffer.
- P(full) and V(empty) are used to synchronize the producer process P1.
- P(empty) and V(full) are used to synchronize the consumer process P2.
- Option D (P(empty), V(full), P(full), V(empty)) correctly represents the synchronization operations required for the producer-consumer problem.
- P(empty) is used by the consumer process P2 to wait if the buffer is empty.
- V(full) is used by the producer process P1 to signal that a slot in the buffer is filled.
- P(full) is used by the producer process P1 to wait if the buffer is full.
- V(empty) is used by the consumer process P2 to signal that a slot in the buffer is emptied.
- This combination ensures that the producer and consumer processes synchronize correctly and avoid buffer underflow or overflow conditions.
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The semaphore variables full, empty and mutex are initialized to 0, n and 1, respectively. Process P1repeatedly adds one item at a time to a buffer of size n, and process P2repeatedly removes one item at a time from the same buffer using the programs given below. In the programs, K, L, M and N are unspecified statements.P1while (1) { K;P(mutex); Add an item to the buffer; V(mutex); L;}P2while (1) { M;P(mutex); Remove an item from the buffer; V(mutex); N;} The statements K, L, M and N are respectivelya)P(full), V(empty), P(full), V(empty)b)P(full), V(empty), P(empty), V(full)c)P(empty), V(full), P(empty), V(full)d)P(empty), V(full), P(full), V(empty)Correct answer is option 'D'. Can you explain this answer?
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The semaphore variables full, empty and mutex are initialized to 0, n and 1, respectively. Process P1repeatedly adds one item at a time to a buffer of size n, and process P2repeatedly removes one item at a time from the same buffer using the programs given below. In the programs, K, L, M and N are unspecified statements.P1while (1) { K;P(mutex); Add an item to the buffer; V(mutex); L;}P2while (1) { M;P(mutex); Remove an item from the buffer; V(mutex); N;} The statements K, L, M and N are respectivelya)P(full), V(empty), P(full), V(empty)b)P(full), V(empty), P(empty), V(full)c)P(empty), V(full), P(empty), V(full)d)P(empty), V(full), P(full), V(empty)Correct answer is option 'D'. Can you explain this answer? for Computer Science Engineering (CSE) 2025 is part of Computer Science Engineering (CSE) preparation. The Question and answers have been prepared according to the Computer Science Engineering (CSE) exam syllabus. Information about The semaphore variables full, empty and mutex are initialized to 0, n and 1, respectively. Process P1repeatedly adds one item at a time to a buffer of size n, and process P2repeatedly removes one item at a time from the same buffer using the programs given below. In the programs, K, L, M and N are unspecified statements.P1while (1) { K;P(mutex); Add an item to the buffer; V(mutex); L;}P2while (1) { M;P(mutex); Remove an item from the buffer; V(mutex); N;} The statements K, L, M and N are respectivelya)P(full), V(empty), P(full), V(empty)b)P(full), V(empty), P(empty), V(full)c)P(empty), V(full), P(empty), V(full)d)P(empty), V(full), P(full), V(empty)Correct answer is option 'D'. Can you explain this answer? covers all topics & solutions for Computer Science Engineering (CSE) 2025 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for The semaphore variables full, empty and mutex are initialized to 0, n and 1, respectively. Process P1repeatedly adds one item at a time to a buffer of size n, and process P2repeatedly removes one item at a time from the same buffer using the programs given below. In the programs, K, L, M and N are unspecified statements.P1while (1) { K;P(mutex); Add an item to the buffer; V(mutex); L;}P2while (1) { M;P(mutex); Remove an item from the buffer; V(mutex); N;} The statements K, L, M and N are respectivelya)P(full), V(empty), P(full), V(empty)b)P(full), V(empty), P(empty), V(full)c)P(empty), V(full), P(empty), V(full)d)P(empty), V(full), P(full), V(empty)Correct answer is option 'D'. Can you explain this answer?.
The semaphore variables full, empty and mutex are initialized to 0, n and 1, respectively. Process P1repeatedly adds one item at a time to a buffer of size n, and process P2repeatedly removes one item at a time from the same buffer using the programs given below. In the programs, K, L, M and N are unspecified statements.P1while (1) { K;P(mutex); Add an item to the buffer; V(mutex); L;}P2while (1) { M;P(mutex); Remove an item from the buffer; V(mutex); N;} The statements K, L, M and N are respectivelya)P(full), V(empty), P(full), V(empty)b)P(full), V(empty), P(empty), V(full)c)P(empty), V(full), P(empty), V(full)d)P(empty), V(full), P(full), V(empty)Correct answer is option 'D'. Can you explain this answer? for Computer Science Engineering (CSE) 2025 is part of Computer Science Engineering (CSE) preparation. The Question and answers have been prepared according to the Computer Science Engineering (CSE) exam syllabus. Information about The semaphore variables full, empty and mutex are initialized to 0, n and 1, respectively. Process P1repeatedly adds one item at a time to a buffer of size n, and process P2repeatedly removes one item at a time from the same buffer using the programs given below. In the programs, K, L, M and N are unspecified statements.P1while (1) { K;P(mutex); Add an item to the buffer; V(mutex); L;}P2while (1) { M;P(mutex); Remove an item from the buffer; V(mutex); N;} The statements K, L, M and N are respectivelya)P(full), V(empty), P(full), V(empty)b)P(full), V(empty), P(empty), V(full)c)P(empty), V(full), P(empty), V(full)d)P(empty), V(full), P(full), V(empty)Correct answer is option 'D'. Can you explain this answer? covers all topics & solutions for Computer Science Engineering (CSE) 2025 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for The semaphore variables full, empty and mutex are initialized to 0, n and 1, respectively. Process P1repeatedly adds one item at a time to a buffer of size n, and process P2repeatedly removes one item at a time from the same buffer using the programs given below. In the programs, K, L, M and N are unspecified statements.P1while (1) { K;P(mutex); Add an item to the buffer; V(mutex); L;}P2while (1) { M;P(mutex); Remove an item from the buffer; V(mutex); N;} The statements K, L, M and N are respectivelya)P(full), V(empty), P(full), V(empty)b)P(full), V(empty), P(empty), V(full)c)P(empty), V(full), P(empty), V(full)d)P(empty), V(full), P(full), V(empty)Correct answer is option 'D'. Can you explain this answer?.
Solutions for The semaphore variables full, empty and mutex are initialized to 0, n and 1, respectively. Process P1repeatedly adds one item at a time to a buffer of size n, and process P2repeatedly removes one item at a time from the same buffer using the programs given below. In the programs, K, L, M and N are unspecified statements.P1while (1) { K;P(mutex); Add an item to the buffer; V(mutex); L;}P2while (1) { M;P(mutex); Remove an item from the buffer; V(mutex); N;} The statements K, L, M and N are respectivelya)P(full), V(empty), P(full), V(empty)b)P(full), V(empty), P(empty), V(full)c)P(empty), V(full), P(empty), V(full)d)P(empty), V(full), P(full), V(empty)Correct answer is option 'D'. Can you explain this answer? in English & in Hindi are available as part of our courses for Computer Science Engineering (CSE).
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Here you can find the meaning of The semaphore variables full, empty and mutex are initialized to 0, n and 1, respectively. Process P1repeatedly adds one item at a time to a buffer of size n, and process P2repeatedly removes one item at a time from the same buffer using the programs given below. In the programs, K, L, M and N are unspecified statements.P1while (1) { K;P(mutex); Add an item to the buffer; V(mutex); L;}P2while (1) { M;P(mutex); Remove an item from the buffer; V(mutex); N;} The statements K, L, M and N are respectivelya)P(full), V(empty), P(full), V(empty)b)P(full), V(empty), P(empty), V(full)c)P(empty), V(full), P(empty), V(full)d)P(empty), V(full), P(full), V(empty)Correct answer is option 'D'. Can you explain this answer? defined & explained in the simplest way possible. Besides giving the explanation of
The semaphore variables full, empty and mutex are initialized to 0, n and 1, respectively. Process P1repeatedly adds one item at a time to a buffer of size n, and process P2repeatedly removes one item at a time from the same buffer using the programs given below. In the programs, K, L, M and N are unspecified statements.P1while (1) { K;P(mutex); Add an item to the buffer; V(mutex); L;}P2while (1) { M;P(mutex); Remove an item from the buffer; V(mutex); N;} The statements K, L, M and N are respectivelya)P(full), V(empty), P(full), V(empty)b)P(full), V(empty), P(empty), V(full)c)P(empty), V(full), P(empty), V(full)d)P(empty), V(full), P(full), V(empty)Correct answer is option 'D'. Can you explain this answer?, a detailed solution for The semaphore variables full, empty and mutex are initialized to 0, n and 1, respectively. Process P1repeatedly adds one item at a time to a buffer of size n, and process P2repeatedly removes one item at a time from the same buffer using the programs given below. In the programs, K, L, M and N are unspecified statements.P1while (1) { K;P(mutex); Add an item to the buffer; V(mutex); L;}P2while (1) { M;P(mutex); Remove an item from the buffer; V(mutex); N;} The statements K, L, M and N are respectivelya)P(full), V(empty), P(full), V(empty)b)P(full), V(empty), P(empty), V(full)c)P(empty), V(full), P(empty), V(full)d)P(empty), V(full), P(full), V(empty)Correct answer is option 'D'. Can you explain this answer? has been provided alongside types of The semaphore variables full, empty and mutex are initialized to 0, n and 1, respectively. Process P1repeatedly adds one item at a time to a buffer of size n, and process P2repeatedly removes one item at a time from the same buffer using the programs given below. In the programs, K, L, M and N are unspecified statements.P1while (1) { K;P(mutex); Add an item to the buffer; V(mutex); L;}P2while (1) { M;P(mutex); Remove an item from the buffer; V(mutex); N;} The statements K, L, M and N are respectivelya)P(full), V(empty), P(full), V(empty)b)P(full), V(empty), P(empty), V(full)c)P(empty), V(full), P(empty), V(full)d)P(empty), V(full), P(full), V(empty)Correct answer is option 'D'. Can you explain this answer? theory, EduRev gives you an
ample number of questions to practice The semaphore variables full, empty and mutex are initialized to 0, n and 1, respectively. Process P1repeatedly adds one item at a time to a buffer of size n, and process P2repeatedly removes one item at a time from the same buffer using the programs given below. In the programs, K, L, M and N are unspecified statements.P1while (1) { K;P(mutex); Add an item to the buffer; V(mutex); L;}P2while (1) { M;P(mutex); Remove an item from the buffer; V(mutex); N;} The statements K, L, M and N are respectivelya)P(full), V(empty), P(full), V(empty)b)P(full), V(empty), P(empty), V(full)c)P(empty), V(full), P(empty), V(full)d)P(empty), V(full), P(full), V(empty)Correct answer is option 'D'. Can you explain this answer? tests, examples and also practice Computer Science Engineering (CSE) tests.
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