Die neuesten NCP-AII echte Prüfungsfragen, NVIDIA NCP-AII originale fragen

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NVIDIA NCP-AII Fragen&Antworten, NCP-AII Exam

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NVIDIA AI Infrastructure NCP-AII Prüfungsfragen mit Lösungen (Q35-Q40):

35. Frage
A data center is designed for A1 training with a high degree of east-west traffic. Considering cost and performance, which network topology is generally the most suitable?

• A. Ring
• B. Bus
• C. Spine-Leaf
• D. Three-Tier
• E. Mesh

Antwort: C

Begründung:
Spine-Leaf architecture is designed to handle high-bandwidth, low-latency traffic patterns characteristic of AI training. It provides a non-blocking fabric with equal cost paths between any two servers, making it ideal for east-west communication. Three-Tier is more suited for traditional applications with north-south traffic. Ring and Bus are less scalable and perform poorly under heavy load. Mesh is complex and expensive for large-scale deployments.

36. Frage
You are tasked with installing the latest NVIDIA driver on a server running Ubuntu 22.04 for A1 workloads. You have downloaded the driver package 'NVIDIA-Linux-x86 64-535.104.05.run'. Before installation, what is the most critical step to ensure a smooth process, assuming secure boot is enabled?

• A. Simply run the ' .run' file using 'sudo ./NVlDlA-Linux-x86_64-535.104.05.run' .
• B. Install the driver using 'apt install nvidia-driver-535' and let the system handle Secure Boot automatically.
• C. Disable Secure Boot in the BIOS before installing the driver.
• D. Ensure the 'nouveau- driver is blacklisted by adding 'blacklist nouveau- to 'letc/modprobe.d/blacklist-nouveau.conf.
• E. Create a DKMS module and sign the driver with a machine owner key (MOK) for Secure Boot compatibility.

Antwort: D,E

Begründung:
Secure Boot requires kernel modules to be signed. Directly running the .run' file or disabling Secure Boot are generally not recommended. DKMS and MOK signing allows the driver to be validated by the system. Blacklisting nouveau ensures that it won't conflict with the NVIDIA driver. Installing via apt doesn't guarantee Secure Boot compatibility without further steps, so the best approach involves DKMS/MOK and blacklisting.

37. Frage
A server with four installed NVIDIA GPUs is experiencing intermittent crashes during heavy AI training workloads. You suspect a power issue. You have monitored the power consumption and found that the GPUs are briefly exceeding the rated power capacity of the PSU during peak loads. What are TWO effective mitigation strategies you can implement? (Select TWO)

• A. Underclock the GPIJs to reduce their power consumption.
• B. Re-seat the GPUs in their respective slots.
• C. Replace the PSU with a higher wattage PSU.
• D. Disable one of the GPUs to reduce the total power draw.
• E. Increase the server room temperature.

Antwort: A,C

Begründung:
Underclocking the GPUs reduces their power consumption directly. Replacing the PSU provides more headroom to handle the peak loads. Disabling a GPU reduces performance. Increasing server room temperature exacerbates the problem. Reseating GPUs addresses connection issues, not power limitations.

38. Frage
During cluster validation, the Cable Validation Tool (CVT) reports "Underperforming (BER)" for an InfiniBand link. Which BER thresholds indicate a critical signal quality issue requiring cable replacement?

• A. Effective BER > 0 during the first 125 minutes of link operation
• B. Raw BER > 1e-12 or Effective BER > 1.5E-254 for <6hr measurements
• C. Temperature > 85°C on transceiver module
• D. Rx power variance > 3dB between lanes

Antwort: B

Begründung:
NVIDIA's Cable Validation Tool (CVT) and the Unified Fabric Manager (UFM) use strict Bit Error Rate (BER) thresholds to ensure the stability of NDR (400G) and HDR (200G) InfiniBand fabrics. Because modern high-speed links rely on Forward Error Correction (FEC) to fix minor bit flips, a "Raw BER" (errors before FEC) is expected, but must remain within a specific envelope-typically better than $10

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