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CSE MCQs :: OS MCQs

OS MCQs - RAID - Operating System
OS MCQs - Basics - Operating System
OS MCQs - Threads - Operating System
OS MCQs - Security - Operating System
OS MCQs - Deadlocks - Operating System
OS MCQs - Processes - Operating System
OS MCQs - Semaphores - Operating System
OS MCQs - CPU Scheduling - Operating System
OS MCQs - Virtual memory - Operating System
OS MCQs - Memory Management - Operating System
  1. An un-interruptible unit is known as :
    2. A.
    single
    B.
    atomic
    C.
    static
    D.
    None of these

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  2. The TestAndSet instruction is executed :
    3. A.
    after a particular process
    B.
    periodically
    C.
    atomically
    D.
    None of these

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  3. Semaphore is a/an _______ to solve the critical section problem.
    4. A.
    hardware for a system
    B.
    special program for a system
    C.
    integer variable
    D.
    None of these

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  4. Spinlocks are :
    5. A.
    CPU cycles wasting locks over critical sections of programs
    B.
    locks that avoid time wastage in context switches
    C.
    locks that work better on multiprocessor systems
    D.
    All of these

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  5. The main disadvantage of spinlocks is that :
    6. A.
    they are not sufficient for many process
    B.
    they require busy waiting
    C.
    they are unreliable sometimes
    D.
    they are too complex for programmers

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