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CPU as two modes privileged and non-privileged. In order to change the mode from privileged to non-privileged
- a)A hardware interrupt is needed
- b)A software interrupt is needed
- c)Either hardware or software interrupt is needed
- d)A non-privileged instruction (which does not generate an interrupt)is needed
Correct answer is option 'B'. Can you explain this answer?
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Verified Answer
CPU as two modes privileged and non-privileged. In order to change the...
Answer: b
Explanation: A software interrupt by some program which needs some cPU service, at that time the two modes can be interchanged.
Explanation: A software interrupt by some program which needs some cPU service, at that time the two modes can be interchanged.
Most Upvoted Answer
CPU as two modes privileged and non-privileged. In order to change the...
Explanation:
Privileged and non-privileged modes are two modes of operation in CPU. Privileged mode is also known as kernel mode, where the CPU has access to all resources and can execute all instructions. Non-privileged mode is also known as user mode, where the CPU has limited access to resources and can only execute a subset of instructions.
To change the mode from privileged to non-privileged, we need to use a software interrupt. A software interrupt is a mechanism that allows a program to request services from the operating system. When a software interrupt is executed, the CPU switches from privileged mode to non-privileged mode, and control is transferred to the operating system.
The following are the reasons why a software interrupt is needed to change from privileged to non-privileged mode:
1. Security: Privileged mode is designed to protect the operating system from unauthorized access. By using a software interrupt, the operating system can ensure that only authorized programs can execute privileged instructions.
2. Resource Protection: Privileged mode has access to all system resources, including hardware devices and memory. By using a software interrupt, the operating system can control access to these resources and prevent unauthorized access.
3. System Stability: Privileged mode allows the CPU to execute instructions that can modify the system state. By using a software interrupt, the operating system can ensure that these modifications are controlled, and the system remains stable.
Conclusion:
In summary, a software interrupt is needed to change from privileged to non-privileged mode in CPU. This mechanism provides security, resource protection, and system stability. By using a software interrupt, the operating system can ensure that only authorized programs can execute privileged instructions, control access to system resources, and maintain system stability.
Privileged and non-privileged modes are two modes of operation in CPU. Privileged mode is also known as kernel mode, where the CPU has access to all resources and can execute all instructions. Non-privileged mode is also known as user mode, where the CPU has limited access to resources and can only execute a subset of instructions.
To change the mode from privileged to non-privileged, we need to use a software interrupt. A software interrupt is a mechanism that allows a program to request services from the operating system. When a software interrupt is executed, the CPU switches from privileged mode to non-privileged mode, and control is transferred to the operating system.
The following are the reasons why a software interrupt is needed to change from privileged to non-privileged mode:
1. Security: Privileged mode is designed to protect the operating system from unauthorized access. By using a software interrupt, the operating system can ensure that only authorized programs can execute privileged instructions.
2. Resource Protection: Privileged mode has access to all system resources, including hardware devices and memory. By using a software interrupt, the operating system can control access to these resources and prevent unauthorized access.
3. System Stability: Privileged mode allows the CPU to execute instructions that can modify the system state. By using a software interrupt, the operating system can ensure that these modifications are controlled, and the system remains stable.
Conclusion:
In summary, a software interrupt is needed to change from privileged to non-privileged mode in CPU. This mechanism provides security, resource protection, and system stability. By using a software interrupt, the operating system can ensure that only authorized programs can execute privileged instructions, control access to system resources, and maintain system stability.
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CPU as two modes privileged and non-privileged. In order to change the mode from privileged to non-privilegeda)A hardware interrupt is neededb)A software interrupt is neededc)Either hardware or software interrupt is neededd)A non-privileged instruction (which does not generate an interrupt)is neededCorrect answer is option 'B'. Can you explain this answer?
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CPU as two modes privileged and non-privileged. In order to change the mode from privileged to non-privilegeda)A hardware interrupt is neededb)A software interrupt is neededc)Either hardware or software interrupt is neededd)A non-privileged instruction (which does not generate an interrupt)is neededCorrect answer is option 'B'. Can you explain this answer? for Computer Science Engineering (CSE) 2024 is part of Computer Science Engineering (CSE) preparation. The Question and answers have been prepared according to the Computer Science Engineering (CSE) exam syllabus. Information about CPU as two modes privileged and non-privileged. In order to change the mode from privileged to non-privilegeda)A hardware interrupt is neededb)A software interrupt is neededc)Either hardware or software interrupt is neededd)A non-privileged instruction (which does not generate an interrupt)is neededCorrect answer is option 'B'. Can you explain this answer? covers all topics & solutions for Computer Science Engineering (CSE) 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for CPU as two modes privileged and non-privileged. In order to change the mode from privileged to non-privilegeda)A hardware interrupt is neededb)A software interrupt is neededc)Either hardware or software interrupt is neededd)A non-privileged instruction (which does not generate an interrupt)is neededCorrect answer is option 'B'. Can you explain this answer?.
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