Question 21 : When high priority task is indirectly preempted by medium priority task effectively inverting the relative priority of the two tasks, the scenario is called
1. priority inversion
2. priority removal
3. priority exchange
4. priority modification
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Question 22 : Mutual exclusion can be provided by the
1. mutex locks
2. binary semaphores
3. both mutex locks and binary semaphores
4. none of the mentioned
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Question 23 : A semaphore is a shared integer variable
1. that can not drop below zero
2. that can not be more than zero
3. that can not drop below one
4. that can not be more than one
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Question 24 : Which one of the following is a synchronization tool?
1. thread
2. pipe
3. semaphore
4. socket
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Question 25 : If a process is executing in its critical section, then no other processes can be executing in their critical section. This condition is called
1. mutual exclusion
2. critical exclusion
3. synchronous exclusion
4. asynchronous exclusion
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Question 26 : When several processes access the same data concurrently and the outcome of the execution depends on the particular order in which the access takes place, is called
1. dynamic condition
2. race condition
3. essential condition
4. critical condition
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Question 27 : Which process can be affected by other processes executing in the system?
1. cooperating process
2. child process
3. parent process
4. init process
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Question 28 : Which of the following does not interrupt a running process ?
1. A device
2. Timer
3. Scheduler process
4. Power failure
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Question 29 : Which of the following need not necessarily be saved on a context switch between processes ?
1. General purpose registers
2. Translation lookaside buffer
3. Program counter
4. All of the mentioned
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Question 30 : The context of a process in the PCB of a process does not contain :
1. the value of the CPU registers
2. the process state
3. memory-management information
4. context switch time
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