Final answer:
When a deadlock occurs, the CPU utilization will drop as processes are stuck waiting and cannot continue, causing the CPU to sit idle.
Step-by-step explanation:
A deadlock in a computer system occurs when two or more processes are each waiting for the other to release a resource, thereby causing all processes to be stuck and none can proceed. This situation causes the system throughput to suffer as no further processing can be done.
When a deadlock occurs, CPU utilization will typically drop because the affected processes cannot continue, and as a result, they do not use the CPU's processing power. The system effectively stalls, waiting for the deadlock to be resolved, leading to poor CPU performance as it sits idle.