Give at least 2 reasons that modern operating systems switch from user to kernel mode to perform I/O operations, such as turning on a webcam or using a microphone. Provide 3 other examples of such I/O operations. For each example, describe the process for doing this in general terms. Are the reasons that you stated worth the overhead of switching from user mode to kernel mode, and then back to user mode? If you were to design an OS, what would you do differently?
Give at least 2 reasons that modern operating systems switch from user to kernel mode to perform I/O operations, such as turning on a webcam or using a microphone. Provide 3 other examples of such I/O operations. For each example, describe the process for doing this in general terms. Are the reasons that you stated worth the overhead of switching from user mode to kernel mode, and then back to user mode? If you were to design an OS, what would you do differently?
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
Problem 1PE
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Give at least 2 reasons that modern
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