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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 21

You are designing a data center platform for a large-scale AI deployment that must handle unpredictable spikes in demand for both training and inference workloads. The goal is to ensure that the platform can scale efficiently without significant downtime or performance degradation. Which strategy would best achieve this goal?

Correct Answer: D
A hybrid cloud model with on-premises GPUs for steady workloads and cloud GPUs for scaling during demand spikes is the best strategy for a scalable AI data center. This approach, supported by NVIDIA DGX systems and NVIDIA AI Enterprise, leverages local resources for predictable tasks while tapping cloud elasticity (e.g., via NGC or DGX Cloud) for bursts, minimizing downtime and performance degradation.
Option A (fixed servers with CPU-based scaling) lacks GPU-specific adaptability. Option B (round-robin) ignores workload priority, risking inefficiency. Option C (single cloud instance) introduces single-point failure risks. NVIDIA's hybrid cloud documentation endorses this model for large-scale AI.
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Question 22

Your AI cluster is managed using Kubernetes with NVIDIA GPUs. Due to a sudden influx of jobs, your cluster experiences resource overcommitment, where more jobs are scheduled than the available GPU resources can handle. Which strategy would most effectively manage this situation to maintain cluster stability?

Correct Answer: D
Implementing Resource Quotas and LimitRanges in Kubernetes is the most effective strategy to manage resource overcommitment and maintain cluster stability in an NVIDIA GPU cluster. Resource Quotas restrict the total amount of resources (e.g., GPU, CPU, memory) that can beconsumed by namespaces, preventing over-scheduling across the cluster. LimitRanges enforce minimum and maximum resource usage per pod, ensuring that individual jobs do not exceed available GPU resources. This approach provides fine-grained control and prevents instability caused by resource exhaustion.
Increasing the maximum number of pods per node (A) could worsen overcommitment by allowing more jobs to schedule without resource checks. Round-robin scheduling (B) lacks resource awareness and may lead to uneven GPU utilization. Using Horizontal Pod Autoscaler based on memory usage (C) focuses on scaling pods, not managing GPU-specific overcommitment. NVIDIA's "DeepOps" and "AI Infrastructure and Operations Fundamentals" documentation recommend Resource Quotas and LimitRanges for stable GPU cluster management in Kubernetes.
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Question 23

Your AI model training process suddenly slows down, and upon inspection, you notice that some of the GPUs in your multi-GPU setup are operating at full capacity while others are barely being used. What is the most likely cause of this imbalance?

Correct Answer: D
Uneven GPU utilization in a multi-GPU setup often stems from an imbalanced data loading process. In distributed training, if data isn't evenly distributed across GPUs (e.g., via data parallelism), some GPUs receive more work while others idle, causing performance slowdowns. NVIDIA's NCCL ensures efficient communication between GPUs, but it relies on the data pipeline-managed by tools like NVIDIA DALI or PyTorch DataLoader-to distribute batches uniformly. A bottleneck in data loading, such as slow I/O or poor partitioning, is a common culprit, detectable via NVIDIA profiling tools like Nsight Systems.
Model code optimized for specific GPUs (Option A) is unlikely unless explicitly written to exclude certain GPUs, which is rare. Different GPU models (Option B) can cause imbalances due to varying capabilities, but NVIDIA frameworks typically handle heterogeneity; this would be a design flaw, not a sudden issue.
Improper installation (Option C) would likely cause complete failures, not partial utilization. Data distribution is the most probable and fixable cause, per NVIDIA's distributed training best practices.
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Question 24

Which is the best PUE value for a data center?

Correct Answer: A
Power Usage Effectiveness (PUE) measures data center efficiency, with an ideal value of 1.0 (all power used by IT equipment). A PUE of 1.2, indicating only 20% overhead, is highly efficient and closer to the ideal than
2.0 (100% overhead), 3.5, or 5.0, making it the best among the options for energy-conscious AI deployments.
(Reference: NVIDIA AI Infrastructure and Operations Study Guide, Section on Data Center Efficiency)
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Question 25

Your AI team is using Kubernetes to orchestrate a cluster of NVIDIA GPUs for deep learning training jobs.
Occasionally, some high-priority jobs experience delays because lower-priority jobs are consuming GPU resources. Which of the following actions would most effectively ensure that high-priority jobs are allocated GPU resources first?

Correct Answer: B
Configuring Kubernetes pod priority and preemption (B) ensures high-priority jobs get GPU resources first.
Kubernetes supports priority classes, allowing high-priority pods to preempt (evict) lower-priority pods when resources are scarce. Integrated with NVIDIA GPU Operator, this dynamically reallocates GPUs, minimizing delays without manual intervention.
* More GPUs(A) increases capacity but doesn't prioritize allocation.
* Manual assignment(C) is unscalable and inefficient.
* Node affinity(D) binds jobs to nodes but doesn't address priority conflicts.
NVIDIA's Kubernetes integration supports this feature (B).
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