Kernels and Privilege Levels An operating system's user mode (a privilege level) offers access to privileged commands, which are reserved for the kernel components of the operating system. Ring 0 of the onion model of the layered approach to operating system structuring is the innermost ring and corresponds to the kernel mode. The traditional UNIX kernel is an example of a microkernel.

Database System Concepts
7th Edition
ISBN:9780078022159
Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Chapter1: Introduction
Section: Chapter Questions
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Please answer this to the best of abilities.. Select all of the statements that are true.
Kernels and Privilege Levels
0
An operating system's user mode (a privilege level) offers access to privileged
commands, which are reserved for the kernel components of the operating
system.
Ring 0 of the onion model of the layered approach to operating system
structuring is the innermost ring and corresponds to the kernel mode.
The traditional UNIX kernel is an example of a microkernel.
Transcribed Image Text:Kernels and Privilege Levels 0 An operating system's user mode (a privilege level) offers access to privileged commands, which are reserved for the kernel components of the operating system. Ring 0 of the onion model of the layered approach to operating system structuring is the innermost ring and corresponds to the kernel mode. The traditional UNIX kernel is an example of a microkernel.
Interrupts
0
In order to be able to handle hardware interrupts, an appropriate interrupt
service routine must be identified and invoked.
Interrupt handling is much more efficient than periodically checking for external
hardware events (polling).
Software interrupts are generated synchronously to program flow.
Transcribed Image Text:Interrupts 0 In order to be able to handle hardware interrupts, an appropriate interrupt service routine must be identified and invoked. Interrupt handling is much more efficient than periodically checking for external hardware events (polling). Software interrupts are generated synchronously to program flow.
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