Operating Systems Questions

1. The bakery algorithm allows two processes to pick the same value for turn. Yet, it does not create a conflict for mutual exclusion. How is this situation resolved?

2. Consider the three states a process can assume: running, ready, and blocked. A process is currently scheduled to run. There is a hardware interrupt raised. What will be the state transition for the process?

3. The the following code to creates a child to do something and return. The return value is to be caught by the parent. Can you see any problem with the code that I wrote? How will you fix it?

pid_t pid = fork();

if ( pid < 0 )

exit ( 1 );

if ( pid == 0 )

wait();

exit ( 0 );