Which of the following is not true with respect to deadlock prevention and deadlock avoidance schemes?
1
In deadlock prevention, the request for resources is always granted if resulting state is safe
2
In deadlock avoidance, the request for resources is always granted, if the resulting state is safe
3
Deadlock avoidance requires knowledge of resource requirements a priori
4
Deadlock prevention is more restrictive than deadlock avoidance