3. Processes, Exceptions and Signals

1. A parent process fork()ed a child process to create some large object. The child process wants to give the object back to the parent. Can this easily be done by signals? If yes, say how:

   If no, say why not and give an alternative:

2. A parent process fork()s a child process. The child continues running the same program as the parent (it does not do a execl() or similar system call). Is the best way that the parent can give a data structure created before the fork() to the child by writing it to a file and having the child read that file?

   If so, why? If not, why not?

3. Let us say you write a program to measure how quick a person's fingers are by trapping SIGINT and then asking them to pressCtrl-C as rapidly as possible. The SIGINT signal handler increments a global counter every time Ctrl-C is typed. After a predefined time it stops and prints the global counter divided by the time used. What is a fundamental problem with this program?