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Andrew S. Tanenbaum (OS) Edition 4 Exercise 5 Question 55 (Page No. 434)
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Write a program that simulates stable storage. Use two large fixed-length files on your disk to simulate the two disks.
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Andrew S. Tanenbaum (OS) Edition 4 Exercise 5 Question 57 (Page No. 434)
Write a program to implement multiple timers using a single clock. Input for this program consists of a sequence of four types of commands ... , and Clock header. Your program should also print out a statement whenever it is time to raise a signal.
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Andrew S. Tanenbaum (OS) Edition 4 Exercise 5 Question 56 (Page No. 434)
Write a program to implement the three disk-arm scheduling algorithms. Write a driver program that generates a sequence of cylinder numbers $(0–999)$ at random, runs the three algorithms for this sequence and prints out the total distance (number of cylinders) the arm needs to traverse in the three algorithms.
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Andrew S. Tanenbaum (OS) Edition 4 Exercise 5 Question 54 (Page No. 434)
A notebook computer is set up to take maximum advantage of power saving features including shutting down the display and the hard disk after periods of inactivity. A user sometimes runs UNIX programs in text mode, and ... She is surprised to find that battery life is significantly better when she uses text-only programs. Why?
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Andrew S. Tanenbaum (OS) Edition 4 Exercise 5 Question 53 (Page No. 434)
If a CPU's maximum voltage, $V,$ is cut to $V/n,$ its power consumption drops to $1/n^{2}$ of its original value and its clock speed drops to $1/n$ of its original value. Suppose that a user ... is the corresponding energy saving in percent compared to not cutting the voltage? Assume that an idle CPU consumes no energy at all.
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