フリー問題

問題文

A power utility has one queue with a guaranteed share that keeps waiting because another queue took everything. Which pair describes what enabling preemption changes?

選択肢

1. Preemption lets the higher priority work displace the lower priority work, so the taken resources come from the greedy queue and the waiting queue reaches its guaranteed share after that change.
2. Preemption lets the higher priority work displace the lower priority work, so the taken resources come from the greedy queue and the waiting queue reaches its requested maximum after that change.
3. Preemption lets the higher priority work displace the lower priority work, so the taken resources come from the idle queue and the waiting queue reaches its guaranteed share after that change.
4. Preemption lets the higher priority work displace the lower priority work, so the taken resources come from the idle queue and the waiting queue reaches its requested maximum after that change.