Synchronization

How many semaphores are used to provide solution of producer-consumer problem

• 2 binary semaphore and 1 counting semaphore

• 1 binary semaphore and 2 counting semaphore

• 2 binary semaphore and 2 counting semaphore

• 3 counting semaphores

Which of the following statement is true for hardware synchronization

• interrupt is disabled when critical section is in execution

• interrupt is enabled when critical section is in execution

• interrupt is enabled when critical section execution is completed

• Multiprocessor system not provide this synchronization mechanism

1. Consider a semaphore S, initialized with value 27. Which of the following options gives the final value of S=12?

• Execution of 12 P() and 15 V()

• Execution of 15 P()

• Execution of 23 P() and 8 V()

• Execution of 21 P() and 6 V()

A monitor is a module and monitor which of the following can encapsulates

• shared data structures
  

• procedures that operate on shared data structure
  

• synchronization between concurrent procedure invocation
  

• all of the mentioned

When high priority task is indirectly preempted by medium priority task effectively inverting the relative priority of the two tasks, the scenario is called

•   priority inversion

    

• priority removal

   

• priority exchange

    

• priority modification