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NVIDIA AI Infrastructure Sample Questions:

1. You are deploying a new A1 cluster using RoCEv2 over a lossless Ethernet fabric. Which of the following QOS (Quality of Service) mechanisms is critical for ensuring reliable RDMA communication?

A) ECN (Explicit Congestion Notification)
B) Rate Limiting
C) DSCP (Differentiated Services Code Point) marking
D) ACL (Access Control List)
E) PFC (Priority Flow control)

2. You've successfully deployed BlueField OS to your SmartNlC. You need to verify that the Mellanox Ethernet driver (mlx5) is loaded and functioning correctly. What command would you use to confirm this?

A)

B)

C)

D)

E)

3. You are deploying a new A1 inference service using Triton Inference Server on a multi-GPU system. After deploying the models, you observe that only one GPU is being utilized, even though the models are configured to use multiple GPUs. What could be the possible causes for this?

A) The model configuration file does not specify the 'instance_group' parameter correctly to utilize multiple GPUs.
B) The Triton Inference Server is not configured to enable CUDA Multi-Process Service (MPS).
C) The GPUs are not of the same type and Triton cannot properly schedule across them.
D) Insufficient CPU cores are available for the Triton Inference Server, limiting its ability to spawn multiple inference processes.
E) The models are not optimized for multi-GPU inference, resulting in a single GPU bottleneck.

4. Consider a scenario where you need to isolate GPU workloads in a multi-tenant Kubernetes cluster. Which of the following Kubernetes constructs would be MOST suitable for achieving strong isolation at both the resource and network level?

A) Using namespaces with resource quotas and network policies.
B) Using taints and tolerations to dedicate GPU nodes to specific workloads.
C) Using labels and selectors to schedule workloads on specific GPU nodes.
D) Using node affinity only.
E) Using pod affinity and anti-affinity rules to control pod placement.

5. You encounter an error during the BlueField OS flashing process using 'bfboot: 'ERROR: Could not detect a BlueField device'. Which of the following steps is MOST likely to resolve the issue?

A) Update the 'bfboot' utility to the latest version. Older versions may have compatibility issues.
B) Ensure the BlueField device is powered on and properly connected to the host system via PCIe.
C) Check the systems BIOS/UEFI to confirm that SR-IOV is enabled.
D) Install the Mellanox OFED drivers on the host system. These drivers are required for 'bfboot' to function correctly.
E) Verify that the correct PCIe slot is being used. Some systems may have specific slots designated for SmartNICs.

Solutions: