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Q1. Which of the following instructions should be privileged? Explain your answer. Set value of timer. Read the clock. Clear memory. Issue a trap instruction.

Q1. Which of the following instructions should be privileged? Explain your answer.

  1. Set value of timer.
  2. Read the clock.
  3. Clear memory.
  4. Issue a trap instruction.
  5. Turn off interrupts.
  6. Modify entries in device-status table.
  7. Switch from user to kernel mode.
  8. Access I/O device.

EXPLAIN WHY PLEASE !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

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