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Questions and Answers
Which mode allows the operating system to protect itself and other system components?
Which mode allows the operating system to protect itself and other system components?
- User mode
- Supervisor mode
- System mode
- Kernel mode (correct)
What is the purpose of the mode bit provided by hardware?
What is the purpose of the mode bit provided by hardware?
- To reset the system call
- To distinguish between user code and kernel code (correct)
- To execute privileged instructions
- To change the mode to user
What happens when a system call is made?
What happens when a system call is made?
- The mode bit is reset
- The mode bit is changed to user
- The mode bit is changed to kernel (correct)
- The mode bit is ignored
Study Notes
System Protection and Mode Bit
- Kernel mode allows the operating system to protect itself and other system components.
- The mode bit provided by hardware is used to differentiate between kernel mode and user mode.
System Calls
- When a system call is made, the operating system switches from user mode to kernel mode.
- This switch allows the operating system to execute privileged instructions and access protected resources.
- The system call interface provides a way for user-mode applications to request services from the operating system.
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Description
Test your knowledge of operating system operations and dual-mode operation with this quiz. Learn about user mode, kernel mode, system calls, and the role of the mode bit in distinguishing between user code and kernel code.
