NCP-AII

NCP-AII practice questions, page 7 of 7, with answer review and explanations.

Question 31

What command sequence is used to identify the exact name of the server that runs as the master SM in a multi-node fabric?

  1. ibstat, then sminfo
  2. sminfo, then smpquery ND
  3. ibis, then ibsim
  4. sminfo, then smpquery NI

Question 32

An InfiniBand server stops working, and a system administrator runs the “ibstat” command that provides the following output: What is the cause of the issue?

  1. The HCA port is faulty.
  2. There is no running SM in the fabric.
  3. The cable is disconnected.
  4. The neighboring switch port is faulty.

Question 33

After NCCL burn-in reports “transport retry count exceeded”, which corrective action addresses the underlying fabric issue?

  1. Switch from Ring to Tree algorithms via NCCL_ALGO=TREE
  2. Inspect InfiniBand link quality metrics (BER, symbol errors) and replace faulty cables
  3. Increase NCCL_IB_TIMEOUT to tolerate longer latencies
  4. Reduce message size to decrease network utilization