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NVIDIA NCP-AII Exam Syllabus Topics:

TopicDetails
Topic 1
  • Cluster Test and Verification: Covers full cluster validation through HPL and NCCL benchmarks, NVLink and fabric bandwidth tests, cable and firmware checks, and burn-in testing using HPL, NCCL, and NeMo.
Topic 2
  • Physical Layer Management: Covers configuring BlueField network platform devices and setting up Multi-Instance GPU (MIG) partitioning for AI and HPC workloads.
Topic 3
  • Troubleshoot and Optimize: Covers identifying and replacing faulty hardware components such as GPUs, network cards, and power supplies, along with performance optimization for AMD
  • Intel servers and storage.
Topic 4
  • System and Server Bring-up: Covers end-to-end physical setup of GPU-based AI infrastructure, including BMC
  • OOB
  • TPM configuration, firmware upgrades, hardware installation, and power and cooling validation to ensure servers are workload-ready.
Topic 5
  • Control Plane Installation and Configuration: Covers deploying the software stack including Base Command Manager, OS, Slurm
  • Enroot
  • Pyxis, NVIDIA GPU and DOCA drivers, container toolkit, and NGC CLI.

NVIDIA AI Infrastructure Sample Questions (Q29-Q34):

NEW QUESTION # 29
You are setting up a BlueField-2 SmartNIC and want to offload network functions. Which of the following are valid methods for enabling hardware offload capabilities?

Answer: C,E

Explanation:
The 'ethtoor command is used to configure various network interface settings, including enabling/disabling hardware offload features. Installing the correct Mellanox OFED drivers is crucial, as they provide the necessary modules and tools to utilize the hardware offload capabilities. While device tree modification can influence hardware behavior, it's less common and typically handled by driver configuration. A custom script directly programming the hardware is unlikely and driver recompilation may be required, but often isn't necessary with default settings.


NEW QUESTION # 30
An InfiniBand server stops working, and a system administrator runs the "ibstat" command that provides the following output:
CA 'mlx5_1'
CA type: MT4115
Number of ports: 2
Firmware version: 10.20.1010
Hardware version: 0
Node GUID: 0x0002c90300002f78
System image GUID: 0x0002c90300002f7b
Port 1:
State: Initializing
Physical state: Linkup
Rate: 100
Base lid: 0
LMC: 0
SM lid: 0
Capability mask: 0x0251086a
Port GUID: 0x0002c90300002f79
Link layer: InfiniBand
What is the cause of the issue?

Answer: D

Explanation:
The ibstat command is a fundamental diagnostic tool in the NVIDIA InfiniBand stack used to query the status of local Host Channel Adapters (HCAs). In the provided output, the most critical data points are the Physical state, the State, and the SM lid.
The Physical state: Linkup confirms that the electrical or optical connection between the server's HCA and the neighboring switch port is established and healthy at the physical layer. This immediately rules out a disconnected cable (Option D) or a completely dead hardware port (Options A and C). However, the State:
Initializing indicates that while the "wires" are connected, the logical InfiniBand protocol has not finished its handshake.
In an InfiniBand fabric, the Subnet Manager (SM) is the centralized "brain" responsible for discovering nodes, assigning Local Identifiers (LIDs), and configuring routing tables. The output shows Base lid: 0 and SM lid: 0, which signifies that the port has not been assigned a LID and cannot find an active Subnet Manager to talk to. Without a running SM to transition the port from "Initializing" to "Active," no RDMA traffic can pass through the fabric. This scenario typically occurs if the SM service has crashed on the management node, or if the SM is disabled on the managed switches. Therefore, the root cause is the absence of an operational Subnet Manager in the fabric to complete the logical link initialization.


NEW QUESTION # 31
You're deploying a BlueField-2 DPU in a cloud environment and need to ensure the integrity of the DPU's firmware. You want to verify that the firmware hasn't been tampered with. Which of the following methods provides the strongest level of assurance for firmware integrity?

Answer: A

Explanation:
Digitally signed firmware provides the strongest guarantee of integrity. The signature verifies that the firmware hasn't been tampered with since it was signed by NVIDIA. SHA256 checksums are good, but digital signatures are cryptographically stronger. MD5 checksums are considered weak and easily compromised. Firmware version and file size offer minimal assurance against sophisticated attacks.


NEW QUESTION # 32
A system engineer needs to set the vGPU scheduling behavior for all GPUs to share the scheduling equally with the default time slice length. What command should be used?

Answer: B

Explanation:
When deploying NVIDIA vGPU on VMware ESXi, the NVIDIA driver provides several scheduling policies to determine how GPU physical resources are shared among multiple virtual machines. The default behavior is often the "Best Effort" scheduler, but for environments requiring predictable performance across all users, the "Equal Share" scheduler is preferred. This scheduler gives each vGPU an equal "time slice" of the physical GPU's engines. The configuration is managed via module parameters passed to the nvidia kernel driver during host boot. The specific registry key for this behavior is RmPVMRL. Setting RmPVMRL=0x01 enables the Equal Share scheduler (Option A). Conversely, 0x00 would revert to the default time-sliced behavior. It is critical to use system module parameters set to ensure the setting persists across reboots and is applied globally to the NVIDIA driver stack. This ensures that no single "noisy neighbor" VM can monopolize the GPU cycles, which is a common requirement in shared AI research labs or virtual desktop infrastructures where consistency is more important than raw peak throughput of a single task.


NEW QUESTION # 33
To validate bisectional bandwidth across two racks in a Spectrum-X Ethernet fabric, which NCCL test configuration isolates East-West traffic?

Answer: C

Explanation:
In a large-scale Spectrum-X Ethernet fabric, "East-West" traffic refers to the cross-rack communication between compute nodes. To validate the "Bisectional Bandwidth" (the throughput between two halves of the cluster), administrators use NCCL tests with specific environment variables to control traffic patterns. The NCCL_TESTS_SPLIT variable is used to partition the GPUs into distinct groups for the benchmark. Setting NCCL_TESTS_SPLIT="DIV 8" is a standard configuration for multi-node testing on 8-GPU systems. It effectively divides the total number of GPUs by the node count, creating a test environment where each GPU communicates with its corresponding rank on other nodes. By combining this with -g 1 (one GPU per process) across multiple nodes, the engineer can force data to travel across the leaf-and-spine switches rather than staying within the NVLink fabric of a single node. This isolates the physical network performance from the internal GPU-to-GPU bandwidth, providing a true measurement of the fabric's ability to handle high- speed AI traffic.


NEW QUESTION # 34
......

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