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Homework Help: Why are these considered privileged/not privileged?

  1. Jan 29, 2013 #1
    1. Why are these considered privileged/not privileged?
    a. Set value of timer.
    b. Read the clock.
    c. Invoking a system call
    d. Check the current list of running processes

    3. a. Yes
    b. No
    c. Yes
    d. No

    I'm thinking b/d is not privileged because any one can have access to it? But I'm not sure what makes a and c privileged.
  2. jcsd
  3. Jan 29, 2013 #2

    Simon Bridge

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    Science Advisor
    Homework Helper

    Think about (c): would you really want just anybody to be able to invoke a system call?
    Compare with (b) - does it matter who can read the clock?
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