# Quiz

+ What is the correct assumption that TiKV has a writing hotspot? (Please select 3) 
  + `A` . GRPC CPU usage is unbalanced
  + `B` . Scheduler worker CPU usage is unbalanced
  + `C` . Unified read pool CPU usage is unbalanced
  + `D` . Raftstore CPU usage is unbalanced

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1. What is the correct assumption that TiKV has a writing hotspot? (a, b, d)
  1. Unbalanced gRPC CPU usage
  2. Scheduler worker CPU usage is unbalanced
  3. Unified read pool CPU usage is unbalanced
  4. Unbalanced CPU usage in Raftstore