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Exam NCA-AIIO Topic 2 Question 37 Discussion

Actual exam question for NVIDIA's NCA-AIIO exam
Question #: 37
Topic #: 2
You are managing an AI infrastructure using NVIDIA GPUs to train large language models for a social media company. During training, you observe that the GPU utilization is significantly lower than expected, leading to longer training times. Which of the following actions is most likely to improve GPU utilization and reduce training time?

Suggested Answer: A Vote an answer

Using mixed precision training (A) is most likely to improve GPU utilization and reduce training time. Mixed precision combines FP16 and FP32 computations, leveraging NVIDIA Tensor Cores (e.g., in A100 GPUs) to perform more operations per cycle. This increases throughput, reduces memory usage, and keeps GPUs busier, addressing low utilization. It's widely supported in frameworks like PyTorch and TensorFlow via NVIDIA's Apex or automatic mixed precision (AMP).
* Decreasing model complexity(B) might speed up training but sacrifices accuracy, not addressing utilization directly.
* Increasing batch size(C) can improve utilization but risks memory overflows if too large, and doesn't optimize compute efficiency like mixed precision.
* Reducing learning rate(D) affects convergence, not GPU utilization.
NVIDIA promotes mixed precision for large language models (A).

by Enid at Dec 27, 2025, 01:32 PM

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