Draw the following procedure concurrency diagram, analyze the output sequence of the following program has several possible output sequence?
Int main () {
If (the fork ()==0) {printf (" A "); Printf (" B "); exit(0); }
The else {
If (the fork ()==0) {printf (" C "); Printf (" D "); exit(0); } else {printf (" E "); Printf (" F "); exit(0);
}
}
}