Can someone offer an explanation to these few simple questions please? Answer these questions about the various forms of VOb. What is the byte count, as used in DMA IVO and what happens when this count reaches 0?c. What can channel I/O do that DMA I/O cannot?

Answered: Answer these questions about the…

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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Can someone offer an explanation to these few simple questions please?

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Step 1

Step 2

Answer for the various type of I/O is dicussed here.

Step 3

Reasons of interrupt-driven I/O better than programmed I/O:

In the programmed I/O, CPU spends most of its time in a tight loop waiting for the device until I/O is completed.
But in the interrupt-driven I/O, the processor does not wait for until the I/O operation is complete. Rather the processor do the other operation.
Therefore, the interrupt-driven I/O is better than programmed I/O.

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