PRS for Kishores lecture for Feb 23, 2006

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PRS for Kishores lecture for Feb 23, 2006
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• Q1. (30 sec) A process differs from a program in
  that
• Process is a machine language representation of a
  program.
• Process is a program in execution.
• Process is a program that executes correctly.
• Process is a special kind of program that is part
  of the operating system.
• There is no difference.
• No clue.

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• Q2. (30 sec) In most modern day operating systems
• There is exactly one program in residence in
  memory at any point of time
• There are multiple programs in residence in
  memory at any point of time
• There is exactly one program but multiple
  processes in residence in memory at any point of
  time
• There are no systems that operate
• All of the above
• None of the above

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• Q3. (30 sec) The following attributes are part of
  the state of a running program
• General Purpose Registers that are visible to the
  instruction set
• Program counter and the register that represents
  the stack pointer
• Layout of the program in memory
• Priority information
• Internal registers in the datapath of the
  processor
• All of the above
• 1, 2, 3, 4, 5
• 1, 2, 3
• 1, 2, 3, 4
• None of the above

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• Q4. (30 secs) The most user centric metric of a
  scheduler is
• Throughput
• Average waiting time
• Average turnaround time
• CPU Utilization
• Response time
• None of the above

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FCFS

• Each process does
• CPU burst
• I/O burst
• CPU burst
• DONE

• Q5. (30 secs) Assuming all the processes arrive
  time 0, the wait time experienced by P2 is
• 27 units
• 0 units
• 26 units

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SJF

• Each process does
• CPU burst
• I/O burst
• CPU burst
• DONE

• Q6. (30 secs) Assuming all the processes arrive
  time 0, the throughput of the system is
• 1/11 processes/unit-time
• 2/33 processes/unit-time
• 3/23 processes/unit-time