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Thread: CS604 Mid Term Paper June 2010

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    99 CS604 Mid Term Paper June 2010

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    total Qs 26.
    20 MCQs.
    2Qs of 2 marks.
    2Qs of 3 marks.
    2Qs of 5 marks.
    Limited Register contains the size of the

    process.
    Command-line interpreter is also called shell in

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    some operating system.
    You can use the cp file1 file2 command to copy file1

    to file2.
    IO bound process spend more time doing IO than

    computation.
    Pipes are used for communication between related

    processes on a system.
    What are pros and cons of multithreading?5 marks
    user threadsare supported above kernel and are

    implemented by a thread library at the user level.
    Kernel threads are supported directly by the

    operating system.
    Inone-to-one model, there is a kernel thread for

    every user thread.
    What is waiting time in context of CPU burst?2marks
    Prove that SJF is an optimal scheduling?3marks
    A semaphore is an integer variable that, apart

    from initialization is accessible only through two

    standard atomic operations: wait and signal.
    Q. What is the main disadvantage od semaphore?5marks
    Q. About spinlock..3marks








    20 MCQ's and 6 questions

    1. Write data structures for bakery algorithm? (2 marks)
    2. Which command is used for suspending a foreground process? (2 marks)
    3. Which command is used to resume the execution of a suspended job in
    the background? (3 marks)
    4. Define race condition? (3 marks)
    5. How to implement RR scheduling? (5 marks)

    6. Highlight critical sections of this code? (5 marks)
    :o:o--------------------------------------------------------------------------------------:o:o
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    Senior Member viki's Avatar
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    CS604 - Operating System
    20 MCQ's and 6 questions

    1. Write data structures for bakery algorithm? (2 marks)
    2. Which command is used for suspending a foreground process? (2 marks)
    3. Which command is used to resume the execution of a suspended job in the background? (3 marks)
    4. Define race condition? (3 marks)
    5. How to implement RR scheduling? (5 marks)
    6. Highlight critical sections of this code? (5 marks)

    do
    {
    while (TestAndSet(lock)) ;
    Critical section
    lock=false;
    Remainder section
    } while(1);
    :o:o--------------------------------------------------------------------------------------:o:o
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