Operating Systems MCQs Set-4

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  1. 1. Process synchronization can be done on
    • hardware level
    • software level
    • both (a) and (b)
    • none of the mentioned
  2. 2. A monitor is a module that encapsulates
    • shared data structures
    • procedures that operate on shared data structure
    • synchronization between concurrent procedure invocation
    • all of the mentioned
  3. 3. What is the reusable resource?
    • that can be used by one process at a time and is not depleted by that use
    • that can be used by more than one process at a time
    • that can be shared between various threads
    • none of the mentioned
  4. 4. Which of the following condition is required for deadlock to be possible?
    • mutual exclusion
    • a process may hold allocated resources while awaiting assignment of other resources
    • no resource can be forcibly removed from a process holding it
    • all of the mentioned
  5. 5. Which one of the following is the deadlock avoidance algorithm?
    • banker’s algorithm
    • round-robin algorithm
    • elevator algorithm
    • karn’s algorithm
  6. 6. For effective operating system, when to check for deadlock?
    • every time a resource request is made
    • at fixed time intervals
    • both (a) and (b)
    • none of the mentioned
  7. 7. To avoid deadlock
    • there must be a fixed number of resources to allocate
    • resource allocation must be done only once
    • all deadlocked processes must be aborted
    • inversion technique can be used
  8. 8. An un-interruptible unit is known as :
    • single
    • atomic
    • static
    • None of these
  9. 9. Semaphore is a/an _______ to solve the critical section problem.
    • hardware for a system
    • special program for a system
    • integer variable
    • None of these
  10. 10. CPU fetches the instruction from memory according to the value of
    • program counter
    • status register
    • instruction register
    • program status word

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