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  1. Home
  2. NVIDIA Certification
  3. NCA-AIIO Exam
  4. NVIDIA.NCA-AIIO.v2026-09-18.q123 Dumps
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Question 36

You are configuring a multi-node AI training environment using NVIDIA GPUs, and your team wants to ensure that the network infrastructure can handle the data transfer between nodes efficiently, especially during distributed training tasks. What is the most critical factor to consider in the network infrastructure to minimize bottlenecks during distributed AI training?

Correct Answer: A
Implementing InfiniBand with RDMA support is the most critical factor to minimize bottlenecks in distributed AI training. It provides ultra-low latency and high bandwidth (e.g., 200 Gb/s), optimizing GPU-to- GPU data transfers via NCCL. Option B (more Ethernet ports) improves redundancy, not speed. Option C (fewer nodes) limits scalability. Option D (SDN) aids management, not raw performance. NVIDIA's DGX networking guides recommend InfiniBand.
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Question 37

You are assisting a senior data scientist in a project aimed at improving the efficiency of a deep learning model. The team is analyzing how different data preprocessing techniques impact the model's accuracy and training time. Your task is to identify which preprocessing techniques have the most significant effect on these metrics. Which method would be most effective in identifying the preprocessing techniques that significantly affect model accuracy and training time?

Correct Answer: C
Performing a multivariate regression analysis with preprocessing techniques as independent variables and accuracy/training time as dependent variables is the most effective method. This statistical approach quantifies the impact of each technique (e.g., normalization, augmentation) on both metrics, identifying significant contributors while accounting for interactions. NVIDIA's Deep Learning Performance Guide suggests such analyses for optimizing training pipelines on GPUs. Option A (line chart) visualizes trends but lacks statistical rigor. Option B (t-test) compares pairs, not multiple factors. Option D (pie chart) shows usage distribution, not impact. Regression aligns with NVIDIA's data-driven optimization strategies.
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Question 38

You are part of a team that is setting up an AI infrastructure using NVIDIA's DGX systems. The infrastructure is intended to support multiple AI workloads, including training, inference, and dataanalysis.
You have been tasked with analyzing system logs to identify performance bottlenecks under the supervision of a senior engineer. Which log file would be most useful to analyze when diagnosing GPU performance issues in this scenario?

Correct Answer: B
NVIDIA GPU utilization logs from nvidia-smi are most useful for diagnosing GPU performance issues on DGX systems. These logs provide real-time metrics (e.g., utilization, memory usage, processes), pinpointing bottlenecks like underutilization or contention. Option A (network logs) aids distributed issues, not GPU- specific ones. Option C (kernel logs) tracks system events, not GPU performance. Option D (application logs) focuses on software, not hardware. NVIDIA's DGX troubleshooting guides prioritize nvidia-smi for GPU diagnostics.
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Question 39

Which type of GPU core was specifically designed to realistically simulate the lighting of a scene?

Correct Answer: C
Ray Tracing Cores, introduced in NVIDIA's RTX architecture, are specialized hardware units built to accelerate ray-tracing computations-simulating light interactions (e.g., reflections, shadows) for photorealistic rendering in real time. CUDA Cores handle general-purpose parallel tasks, and Tensor Cores optimize matrix operations for AI, but only Ray Tracing Cores target lighting simulation.
(Reference: NVIDIA GPU Architecture Whitepaper, Section on Ray Tracing Cores)
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Question 40

In the context of data center use cases, what is the primary purpose of NVIDIA AI Factories?

Correct Answer: C
NVIDIA AI Factories are designed to integrate data ingestion, processing, and large-scale AI model training into a unified architecture, enabling organizations to efficiently build, train, and deploy AI models by tightly coupling accelerated compute, networking, and software stacks provided by NVIDIA.
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