Answered: Consider a file currently consisting of…

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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Question

Consider a file currently consisting of 100 blocks. Assume that the file control
block (and the index block, in the case of indexed allocation) is already in memory. Calculate how
many disk I/O operations are required for contiguous, linked, and indexed (single-level) allocation
strategies, if, for one block, the following conditions hold. In the contiguous-allocation case, assume
that there is no room to grow at the beginning but there is room to grow at the end. Also assume that
the block information to be added is stored in memory.
a. The block is added at the beginning.
b. The block is added in the middle.
c. The block is added at the end.
d. The block is removed from the beginning.
e. The block is removed from the middle.
f. The block is removed from the end

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