Which one of these is not a condition for Resource Deadlock?

For a deadlock to occur, four specific conditions must hold simultaneously:

1. Mutual Exclusion (Non-shareable resources)

2. Hold and Wait

3. No Preemption

4. Circular Wait

5. No Preemption is the actual condition required for deadlock. If "Preemption" is allowed, the operating system can forcibly take a resource away from a process to give it to another, which actually helps prevent or break a deadlock.