Question: All processes share a semaphore variable mutex, which is initialized to 1. Each process must execute wait(mutex) before entering the critical section and signal(mutex) afterward. Suppose that a process replaces signal(mutex) with wait(mutex). That is, it executes wait(mutex);...critical section...wait(mutex); In this Case
Answer:
MCQ: All processes share a semaphore variable mutex, which is initialized to 1. Each process must execute wait(mutex) before entering the critical section and signal(mutex) afterward. Suppose that a process replaces signal(mutex) with wait(mutex). That is, it executes wait(mutex);...critical section...wait(mutex); In this Case
Correct Answer:
A. a deadlock will occur
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Related Questions
- 1. in the following execution: signal(mutex);...critical section...wait(mutex); Suppose that a process omits the wait(mutex), or the signal(mutex), or both. In this case:
- 2. CPU-scheduling decisions may take place under which of the following circumstances: <ol> <li>When a process switches from the running state to the waiting state</li> <li>When a process switches from the running state to the ready state</li> <li>When a process switches from the waiting state to the ready state</li> <li>When a process terminates</li> </ol>
- 3. Under nonpreemptive scheduling, once the CPU has been allocated to a process, the process keeps the CPU until . <ol> <li>it releases the CPU by terminating</li> <li>it releases the CPU by switching to the waiting state</li> <li>it releases the CPU By switching to the ready state</li> <li>it releases the CPU By switching to the Running state</li> </ol>
- 4. An I/O-bound program typically has
- 5. A CPU-bound program might have
- 6. Whenever the CPU becomes idle, the operating system must select one of the processes in the ___ to be executed.
- 7. The ____ is the module that gives control of the CPU to the process selected by the short-term scheduler.
- 8. The dispatcher should be as fast as possible, since it is invoked during every process switch. The time it takes for the dispatcher to stop one process and start another running is known as the ____.
- 9. Many criteria have been suggested for comparing CPU-scheduling algorithms.The criteria include which of thefollowing: <ol> <li>CPU utilization</li> <li>Throughput</li> <li>Turnaround time</li> <li>Waiting time</li> <li>Response time</li> </ol>
- 10. We want to keep the CPU as busy as possible,This criteria refers to as
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