What are the two operating system modes and the two core tasks that an operating system performs? What precisely does the file system's main purpose truly entail?

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
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What are the two operating system modes and the two core tasks that an operating system performs? What precisely does the file system's main purpose truly entail?

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