Requiring a process to request all needed resources simultaneously prevents which classic deadlock condition?

💡 Explanation:

Deadlock is possible when four necessary conditions hold: Mutual Exclusion, Hold and Wait, No Preemption, and Circular Wait. The strategy of requiring a process to request all its resources at the beginning and only allowing it to proceed if all are available directly prevents the 'Hold and Wait' condition. If a process is holding resources, it is guaranteed not to be simultaneously waiting for additional ones, as all have already been granted.