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Andrew S. Tanenbaum (OS) Edition 4 Exercise 2 Question 10 (Page No. 174)
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In the text it was stated that the model of Fig. $2-11(a)$ was not suited to a file server using a cache in memory. Why not? Could each process have its own cache?
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Andrew S. Tanenbaum (OS) Edition 4 Exercise 2 Question 13 (Page No. 174)
In the text, we described a multithreaded Web server, showing why it is better than a single-threaded server and a finite-state machine server. Are there any circumstances in which a single-threaded server might be better? Give an example.
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Andrew S. Tanenbaum (OS) Edition 4 Exercise 2 Question 12 (Page No. 174)
In Fig. $2-8$, a multithreaded Web server is shown. If the only way to read from a file is the normal blocking read system call, do you think user-level threads or kernel-level threads are being used for the Web server? Why?
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Andrew S. Tanenbaum (OS) Edition 4 Exercise 2 Question 11 (Page No. 174)
If a multithreaded process forks, a problem occurs if the child gets copies of all the parent’s threads. Suppose that one of the original threads was waiting for keyboard input. Now two threads are waiting for keyboard input, one in each process. Does this problem ever occur in single-threaded processes?
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Andrew S. Tanenbaum (OS) Edition 4 Exercise 2 Question 9 (Page No. 174)
Assume that you are trying to download a large $2$-GB file from the Internet. The file is available from a set of mirror servers, each of which can deliver a subset of the file's bytes; assume that a ... request specifies the starting and ending bytes of the file. Explain how you might use threads to improve the download time.
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