NVIDIA NCA-AIIO RELIABLE EXAM SIMULATIONS & NCA-AIIO QUESTIONS ANSWERS

NVIDIA NCA-AIIO Reliable Exam Simulations & NCA-AIIO Questions Answers

NVIDIA NCA-AIIO Reliable Exam Simulations & NCA-AIIO Questions Answers

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NVIDIA NCA-AIIO Exam Syllabus Topics:

TopicDetails
Topic 1
  • Essential AI Knowledge: This section of the exam measures the skills of IT professionals and covers the foundational concepts of artificial intelligence. Candidates are expected to understand NVIDIA's software stack, distinguish between AI, machine learning, and deep learning, and identify use cases and industry applications of AI. It also covers the roles of CPUs and GPUs, recent technological advancements, and the AI development lifecycle. The objective is to ensure professionals grasp how to align AI capabilities with enterprise needs.
Topic 2
  • AI Operations: This domain assesses the operational understanding of IT professionals and focuses on managing AI environments efficiently. It includes essentials of data center monitoring, job scheduling, and cluster orchestration. The section also ensures that candidates can monitor GPU usage, manage containers and virtualized infrastructure, and utilize NVIDIA’s tools such as Base Command and DCGM to support stable AI operations in enterprise setups.
Topic 3
  • AI Infrastructure: This part of the exam evaluates the capabilities of Data Center Technicians and focuses on extracting insights from large datasets using data analysis and visualization techniques. It involves understanding performance metrics, visual representation of findings, and identifying patterns in data. It emphasizes familiarity with high-performance AI infrastructure including NVIDIA GPUs, DPUs, and network elements necessary for energy-efficient, scalable, and high-density AI environments, both on-prem and in the cloud.

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NVIDIA-Certified Associate AI Infrastructure and Operations Sample Questions (Q145-Q150):

NEW QUESTION # 145
What is a key consideration when virtualizing accelerated infrastructure to support AI workloads on a hypervisor-based environment?

  • A. Maximize the number of VMs per physical server
  • B. Ensure GPU passthrough is configured correctly
  • C. Disable GPU overcommitment in the hypervisor
  • D. Enable vCPU pinning to specific cores

Answer: B

Explanation:
When virtualizing GPU-accelerated infrastructure for AI workloads,ensuring GPU passthrough is configured correctly(D) is critical. GPU passthrough allows a virtual machine (VM) to directly access a physical GPU, bypassing the hypervisor's abstraction layer. This ensures near-native performance, which is essential for AI workloads requiring high computational power, such as deep learning training or inference.
Without proper passthrough, GPU performance would be severely degraded due to virtualization overhead.
* vCPU pinning(A) optimizes CPU performance but doesn't address GPU access.
* Disabling GPU overcommitment(B) prevents resource sharing but isn't a primary concern for AI workloads needing dedicated GPU access.
* Maximizing VMs per server(C) could compromise performance by overloading resources, counter to AI workload needs.
NVIDIA documentation emphasizes GPU passthrough for virtualized AI environments (D).


NEW QUESTION # 146
An AI operations team is tasked with monitoring a large-scale AI infrastructure where multiple GPUs are utilized in parallel. To ensure optimal performance and early detection of issues, which two criteria are essential for monitoring the GPUs? (Select two)

  • A. Average CPU temperature
  • B. Number of active CPU threads
  • C. GPU fan noise levels
  • D. Memory bandwidth usage on GPUs
  • E. GPU utilization percentage

Answer: D,E

Explanation:
For monitoring GPUs in an AI infrastructure:
* GPU utilization percentage(A) measures how effectively GPUs are being used, identifying underutilization or overloading-key to performance optimization.
* Memory bandwidth usage on GPUs(D) tracks data transfer rates within the GPU, critical for detecting bottlenecks in memory-intensive AI workloads like deep learning.
* Number of active CPU threads(B) is a CPU metric, less relevant to GPU performance.
* Average CPU temperature(C) monitors CPU health, not GPU status.
* GPU fan noise levels(E) are a byproduct, not a direct performance indicator.
NVIDIA's nvidia-smi tool provides these GPU metrics (A and D) for operational monitoring.


NEW QUESTION # 147
Your AI team notices that the training jobs on your NVIDIA GPU cluster are taking longer than expected.
Upon investigation, you suspect underutilization of the GPUs. Which monitoring metric is the most critical to determine if the GPUs are being underutilized?

  • A. GPU Utilization Percentage
  • B. CPU Utilization
  • C. Memory Bandwidth Utilization
  • D. Network Latency

Answer: A

Explanation:
GPU Utilization Percentage is the most direct metric to assess whether GPUs are underutilized during training. Measured as a percentage of time the GPU is actively processing tasks, it's available via NVIDIA tools like nvidia-smi and DCGM (Data Center GPU Manager). A low percentage (e.g., below 70-80% during training) indicates the GPU isn't fully engaged, often due to bottlenecks like slow data loading or inefficient parallelism, common issues in NVIDIA GPU clusters (e.g., DGX systems). This metric pinpoints the root cause of prolonged training times.
Memory Bandwidth Utilization (Option B) shows memory usage efficiency but not overall GPU activity.
Network Latency (Option C) affects multi-node setups but isn't a primary indicator of single-GPU utilization.
CPU Utilization (Option D) reflects CPU load, not GPU performance. NVIDIA's performance tuning guides prioritize GPU Utilization for diagnosing underutilization.


NEW QUESTION # 148
Your AI team is running a distributed deep learning training job on an NVIDIA DGX A100 clusterusing multiple nodes. The training process is slowing down significantly as the model size increases. Which of the following strategies would be most effective in optimizing the training performance?

  • A. Increase Batch Size
  • B. Use Data Parallelism Instead of Model Parallelism
  • C. Decrease the Number of Nodes
  • D. Enable Mixed Precision Training

Answer: D

Explanation:
Enabling Mixed Precision Training is the most effective strategy to optimize training performance on an NVIDIA DGX A100 cluster as model size increases. Mixed precision uses lower-precision data types (e.g., FP16) alongside FP32, reducing memory usage and leveraging Tensor Cores on A100 GPUs for faster computation without significant accuracy loss. This approach, detailed in NVIDIA's "Mixed Precision Training Guide," accelerates training by allowing larger models to fit in GPU memory and speeding up matrix operations, addressing slowdowns in distributed setups.
Data parallelism (B) distributes data but may not help if memory constraints slow computation. Decreasing nodes (C) reduces parallelism, worsening performance. Increasing batch size (D) can strain memory further, exacerbating slowdowns. NVIDIA's DGX A100 documentation highlights mixed precision as a key optimization for large models.


NEW QUESTION # 149
You are responsible for managing an AI infrastructure where multiple data scientists are simultaneously running large-scale training jobs on a shared GPU cluster. One data scientist reports that their training job is running much slower than expected, despite being allocated sufficient GPU resources. Upon investigation, you notice that the storage I/O on the system is consistently high. What is the most likely cause of the slow performance in the data scientist's training job?

  • A. Overcommitted CPU resources
  • B. Incorrect CUDA version installed
  • C. Insufficient GPU memory allocation
  • D. Inefficient data loading from storage

Answer: D

Explanation:
Inefficient data loading from storage (B) is the most likely cause of slow performance when storage I/O is consistently high. In AI training, GPUs require a steady stream of data to remain utilized. If storage I/O becomes a bottleneck-due to slow disk reads, poor data pipeline design, or insufficient prefetching-GPUs idle while waiting for data, slowing the training process. This is common in shared clusters where multiple jobs compete for I/O bandwidth. NVIDIA's Data Loading Library (DALI) is recommended to optimize this process by offloading data preparation to GPUs.
* Incorrect CUDA version(A) might cause compatibility issues but wouldn't directly tie to high storage I
/O.
* Overcommitted CPU resources(C) could slow preprocessing, but high storage I/O points to disk bottlenecks, not CPU.
* Insufficient GPU memory(D) would cause crashes or out-of-memory errors, not I/O-related slowdowns.
NVIDIA emphasizes efficient data pipelines for GPU utilization (B).


NEW QUESTION # 150
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