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Two atomic operations permissible on Semaphores are __________ and __________.
- a)wait, stop
- b)wait, hold
- c)hold, signal
- d)wait, signal
Correct answer is option 'D'. Can you explain this answer?
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Two atomic operations permissible on Semaphores are __________ and ___...
Wait and signal are the atomic operation possible on semaphore.
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Two atomic operations permissible on Semaphores are __________ and ___...
Atomic Operations on Semaphores:
Semaphores are used for process synchronization in operating systems. Two atomic operations permissible on semaphores are "wait" and "signal".
Wait Operation:
- The wait operation decrements the semaphore value by 1.
- If the semaphore value becomes negative after decrementing, the process executing the wait operation is blocked until the semaphore value becomes positive.
- This operation is used to acquire resources or enter critical sections.
Signal Operation:
- The signal operation increments the semaphore value by 1.
- If there are processes blocked on the semaphore due to wait operations, one of them is unblocked.
- This operation is used to release resources or exit critical sections.
Importance of Atomicity:
- Both wait and signal operations need to be atomic to avoid race conditions.
- Atomicity ensures that these operations are indivisible and cannot be interrupted by other processes.
Example of Semaphore Usage:
- Consider a scenario where multiple processes need to access a shared resource.
- A semaphore can be used to control access to the resource by allowing only one process at a time using wait and signal operations.
In conclusion, the wait and signal operations on semaphores are crucial for process synchronization in operating systems. These atomic operations help in managing access to shared resources and critical sections effectively.
Semaphores are used for process synchronization in operating systems. Two atomic operations permissible on semaphores are "wait" and "signal".
Wait Operation:
- The wait operation decrements the semaphore value by 1.
- If the semaphore value becomes negative after decrementing, the process executing the wait operation is blocked until the semaphore value becomes positive.
- This operation is used to acquire resources or enter critical sections.
Signal Operation:
- The signal operation increments the semaphore value by 1.
- If there are processes blocked on the semaphore due to wait operations, one of them is unblocked.
- This operation is used to release resources or exit critical sections.
Importance of Atomicity:
- Both wait and signal operations need to be atomic to avoid race conditions.
- Atomicity ensures that these operations are indivisible and cannot be interrupted by other processes.
Example of Semaphore Usage:
- Consider a scenario where multiple processes need to access a shared resource.
- A semaphore can be used to control access to the resource by allowing only one process at a time using wait and signal operations.
In conclusion, the wait and signal operations on semaphores are crucial for process synchronization in operating systems. These atomic operations help in managing access to shared resources and critical sections effectively.
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Two atomic operations permissible on Semaphores are __________ and __________.a)wait, stopb)wait, holdc)hold, signald)wait, signalCorrect answer is option 'D'. Can you explain this answer?
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