CS1550: Quiz

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CS1550 Quiz 1
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Questions (True A, False B)

• 01) The operating system must provide GUI
  (graphical user interface) functions.No, just
  look at the old DOS and the old Unix systems.
• 02) Kernel threads allow for faster context
  switches than user-level threads.Credit for
  everyone. Yes and no ambiguous question.
  User-level threads have faster context switches
  if they are inside the same process. If they are
  in different processes, kernel-level threads have
  faster context switches
• 03) Deadlock is possible in a batch system.No,
  deadlocks require more than one process to be
  running at a time, and in batch systems only one
  process runs
• 04) Synchronization (with semaphores, locks,
  etc.) is needed when we have multiple processes,
  even if the processes cannot communicate.No, if
  the processes are completely isolated, there is
  no shared resources and therefore no need to
  synchronize.
• 05) Credit for everyone
• 06) Credit for everyone
• 07) Deadlocks waste processor time.No, the
  processes just sit there, so it is as if there
  were no processes
• 08) Whenever there is deadlock there is
  starvation.Yes, deadlocks mean 2 or more
  processes are blocked for ever. They cannot run,
  therefore they are in a starvation situation
• 09) Whenever there is starvation there is a
  deadlock. No, there could be starvation due to
  livelocks or due to a lower priority job never
  getting a chance to run (never being chosen by
  the scheduler)