public class Page
public int id;
public int physical;
public byte R;
public byte M;
public int inMemTime;
public int lastTouchTime;
public long high;
public long low;
public Page( int id, int physical, byte R, byte M, int inMemTime, int
public class Kernel extends Thread
/ The number of virtual pages must be fixed at 63 due to
/ dependencies in the GUI
private static int virtPageNum = 63;
private String out
1) What is a character special file?
It's a special category of character that works like pipes, serial ports, redirecters, and others and they can be used as models to allow interaction with some devices, like printers and modems. These characters are co
23. Does the busy waiting solution using the turn variable (Fig. 2-23) work when the two processes are running on a shared-memory multiprocessor, that is, two CPUs sharing a common memory?
It will work normally, but still being a busy waiting.
2. What happens if two CPUs in a multiprocessor attempt to access exactly the same word of memory at exactly the same instant?
It depends on how the CPUs are connected to the memory. If one of them gets through first so seizes the bus first. Once it comp
1. In Fig. 2-2 (pg 90), three process states are shown. In theory, with three states, there could be six transition, two out of each state.
However, only four transitions are shown. Are there any circumstances in which either or both of the missing trans
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by David Z Morris
Photo by Gallery Stock
David Z Morris write