ent monitor consuming 10,000 of that. When control is to be assigned to an interactive user, the user’s program and data were

Database System Concepts
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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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Assume a primitive time-sharing operating system is running on a computer with 50,000 32-bit words of main memory, with the resident monitor consuming 10,000 of that. When control is to be assigned to an interactive user, the user’s program and data were loaded into the remaining 40,000 words of main memory. A program is always loaded to start at the location of the 10,000th word; this simplified both the monitor and memory management.

Assume that there are four interactive users with the following memory requirements, in words: Job1: 10,000, Job2: 30,000, Job3: 1000, Job4: 5,000

Draw the main memory state diagram considering the following:

(a) The monitor loads Job1 and transfers control to it.

(b) The monitor decides to load Job2 and transfer control to it.

(c) Next, the monitor decides to load Job3 and transfer control to it.

(d) Next, the monitor decides to load Job1 and transfer control to it.

(e) Next, the monitor decides to load Job4 and transfer control to it.

(f) Next, the monitor decides to load Job3 and transfer control to it.

Solve parts A to F

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