Processes Exercises

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  1. Names the process states:
    Process states diagram
  2. Names the process transitions:
    Process states diagram with transitions labeled
  3. Discuss with your neighbor what are the missing transitions and when are they possible?
  4. What is displayed after executing the following program: 
    #include <stdio.h>
#include <unistd.h> // pid_t, getpid()

int main( ){
    pid_t  pid1, pid2, pid3;  // Process IDs

    pid1 = fork();
    pid2 = fork();
    pid3 = fork();

    printf("All done!\n");

    return 0;
}
  5. With your neighbor, name as many operations that requires kernel mode as you can.
  6. With your neighbor, discuss if all or part of the OS executes in kernel mode?