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Andrew S. Tanenbaum (OS) Edition 4 Exercise 2 Question 55 (Page No. 178)
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Consider the procedure put forks in Fig. $2-47$. Suppose that the variable $state[i]$ was set to THINKING after the two calls to test, rather than before. How would this change affect the solution?
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Andrew S. Tanenbaum (OS) Edition 4 Exercise 2 Question 57 (Page No. 178 - 179)
Write a shell script that produces a file of sequential numbers by reading the last number in the file, adding $1$ to it, and then appending it to the file. Run one instance of the script in the background and one in ... region? Modify the script to prevent the race. (Hint: use ln file file.lock to lock the data file.)
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Andrew S. Tanenbaum (OS) Edition 4 Exercise 2 Question 56 (Page No. 178)
The readers and writers problem can be formulated in several ways with regard to which category of processes can be started when. Carefully describe three different variations of the problem, each one favoring (or not ... reader or a writer becomes ready to access the database, and what happens when a process is finished.
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Andrew S. Tanenbaum (OS) Edition 4 Exercise 2 Question 54 (Page No. 178)
In the solution to the dining philosophers problem (Fig. $2-47$), why is the state variable set to HUNGRY in the procedure take_forks?
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Andrew S. Tanenbaum (OS) Edition 4 Exercise 2 Question 53 (Page No. 178)
Consider a system in which it is desired to separate policy and mechanism for the scheduling of kernel threads. Propose a means of achieving this goal.
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