1 Which of the Following Instructions Should Be Privileged

IO instructions and Halt instructions. Modify entries in device-status table.

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Set the value of a timer clear memory turn off interrupts modify entries in device-status table access IO device.

. Which of the following instructions should be privileged. Homework 1 The name tags give scholarly attribution to authors of other OS textbooks who wrote the question you do not need the textbook to be able to answer the question. 19 Some early computers protected the operating system by placing it in a memory partition that could not be modified by either the user job.

If privileged instructions are tried to run in user mode then it will not be executed and show as illegal instruction. Which of the following instructions should be privileged. - Turn off interrupts.

Share Save to bookmarks Export as PDF Report. Set value of timer. The Hardware traps it in the Operating System.

Set value of timer. Turn off all Interrupts. Set value of timer.

The following operations need to be privileged. Privileged Instructions possess the following characteristics. Ii Before transferring the control to any User Program it is the responsibility of the.

What are Non-Privileged Instructions. Modify entries in Device-status table. The device interrupt service routine does it and executes a return from interrupt to restore program counter.

Set value of timer clear memory turn off interruptsmodify entries in device-status table access IO device. Also give a one-sentence explanation for why a Set value of timer b Read the clock c Clear memory d Turn off interrupts e Switch from user to monitor mode. There are basically 2 modes in which a modern OS works.

Switch from user to kernel mode. User mode has no ability to directly access hardware. 1 of the following instructions should be privileged and only allowed to execute in kernel mode explain your answer.

Set value of timer clear. The correct answers are option A option C option E option F and option H. Iv Various examples of Privileged Instructions include.

- Load a value from a memory address to a general-purpose register. Privileged instructions are those instructions that can be executed only when the processor is in kernel mode. The Hardware traps it in the Operating System.

The rest can be performed in user mode. User level processes should not be allowed to do this. The following operations need to be privileged.

Switch from user to kernel mode. Switch from user to kernel mode. Up to 24 cash back Privileged Instructions possess the following characteristics.

16 Which of the following instructions should be privileged. The rest can be performed in user mode. Clear the Memory or Remove a process from the Memory.

Set the value of the timer. 16 Which of the following instructions should be privileged. Issue a trap instruction.

In once sentence explain why for each instruction. Read the clock 3. A Switch from user to kernel mode Unprivileged because its how applications invoke system calls.

Issue a trap instruction. Issue a trap instruction. Which of the following instructions should be privileged.

Set value of timer clear memory turn off interrupts modify entries in device-status table access IO device. Issue a trap instruction. This is a privileged instruction because switching to monitor mode would give the process operating system privileges.

Answer to Which of the following instructions should be privileged. Modify entries in device-status table. Yes otherwise the user program can manipulate it such that the OS never gains control.

5 points each a. Answer 1 of 5. Turn off interrupts 6.

Switch from user to kernel mode Privileged. Switch from user SolutionInn. I If any attempt is made to execute a Privileged Instruction in User Mode then it will not be executed and treated as an illegal instruction.

Set value of timer. Engineering Computer Science QA Library Which of the following instructions should be privileged. Which of the following instructions should be privileged.

It is a privileged instruction. I If any attempt is made to execute a Privileged Instruction in User Mode then it will not be executed and treated as an illegal instruction. I Read the system clock ii Clear memory iii Reading from user space iv Writing to user space v Copy from one register to another vi Turn off interrupts and vii Switch from user to monitor mode.

The Instructions that can run only in Kernel Mode are called Privileged Instructions. Find step-by-step Computer science solutions and your answer to the following textbook question. 1 Which of the following instructions should be privileged.

Whenever the the system boots OS transfers control to kernel mode where kernel runs all the necessary routines and then kernel switches to. Modify entries in device-status table. Issue a trap instruction.

Set value of timer. The catch is the application cannot control where the program counter goes when this switch happens. Which Of The Following Instructions Should Be Privileged run In Kernel Mode.

It can be only executed in Kernel mode. But some special registers like general purpose register can be changed freely without a Kernel getting. Anderson For each of the three mechanisms that supports dual-mode operation privileged instructions memory protection and timer interrupts.

The instruction in PC is executed after TRAP but in Kernel mode. These instructions run only in the kernel mode of the operating system. To perform correct operations the operating system runs these types of instructions.

Set value of timer. Modify entries in device-status table g. Issue a trap instructions 5.

The following operations need to be privileged. This would wipe out the code and data of the OS and any other processes. Set value of the timer 2.

User mode has no ability to directly access hardware or reference memory. Which of the following instructions should be privileged. Set value of timer.

User mode and kernel mode. Why should accessing IO device be a privileged instruction.

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Which Of The Following Instructions Should Be Privileged A Quizlet Instruction Privilege Computer Science

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