.. _hw_intro:

Homework - Introduction Questions
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#.

    Distinguish between the client--server and peer-to-peer models of
    distributed systems.

#.
    What is the purpose of interrupts?  What is the difference between a
    hardware, software interrupt and a trap?    

#.
    Some older computer systems did not provide a privileged (supervisory)
    mode of operation in hardware.  Is it possible to construct a secure
    operating system?  Explain how it might be accomplished. What are the
    potential threats?

#.  What is the purpose of system calls?