A parent process can wait for the completion of its child process before it, the parent, continues. An example is a command line interpreter that makes a child process to run the command a user typed in, waiting for it to finish. It receives a SIGCHILD sent from the child process when the child is done. But a parent process has the option of not waiting for its child process to end before continuing. In that case, does it still get SIGCHILD from the child process? What would that mean to the parent in that case?