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  1. Home
  2. NVIDIA Certification
  3. NCA-GENM Exam
  4. NVIDIA.NCA-GENM.v2026-10-09.q63 Dumps
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Question 51

Given the following Python code snippet using Pandas, which is intended to filter rows where the 'price' column is greater than 100 and the 'quantity' column is less than 5, identify the correct approach to achieve this:

Correct Answer: B,D
Option B uses the 'query' method for concise filtering. Option D correctly uses boolean indexing with the (and) operator within square brackets. Option E is syntactically incorrect because it uses the 'and' keyword, which is meant for single boolean values, not Pandas Series. Option A does logical OR which is not what we intend to filter. Option C is incorrecrt since filter method expects list of column names.
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Question 52

You have trained a multimodal model to generate descriptions for recipes, using images of the finished dish as one modality and a list of ingredients as another. When evaluating the generated descriptions, you notice the descriptions are factually correct in terms of ingredients but often fail to capture the stylistic nuances or tone of professionally written recipes. Which evaluation strategy would provide the most insightful feedback on this aspect of the model's performance?

Correct Answer: D
Human evaluation is the most reliable way to assess subjective aspects of the generated text, such as stylistic appropriateness. While automated metrics like BLEU, ROUGE, and perplexity can provide insights into factual accuracy and fluency, they do not capture the nuances of style and tone as effectively as human judgment. Therefore, the correct answer is (D).
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Question 53

You are tasked with building a multimodal generative AI model to create marketing content from product images and descriptions. The image encoder uses a pre-trained ResNet50 model, and the text encoder uses a pre-trained BERT model. After initial training, the generated content frequently misinterprets the image. Which of the following strategies is MOST effective in improving the model's ability to correctly interpret the image within the multimodal context?

Correct Answer: B
Fine-tuning ResNet50 with a relevant image dataset and a contrastive loss function directly addresses the issue of misinterpreting the image. Freezing weights prevents learning, increasing BERT's learning rate imbalances the model, and a simpler image encoder might lose crucial image details. Decreasing batch size can improve generalization but isn't the primary solution for image misinterpretation.
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Question 54

Consider the following Python code snippet using Triton Inference Server's Python client. The code intends to send a request to a model that expects two input tensors: 'input_image' (shape: [1, 3, 224, 224], datatype: FP32) and 'input_text' (shape: [1 ,], datatype: BYTES). Identify potential issues in this code that could prevent successful inference.

Correct Answer: E
All the mentioned issues (A, B, C, D) can prevent successful inference. requires correction. The input text requires explicit byte encoding. Converting input_image to the correct numpy data type. Specifying the model name and input/output names is important for triton to understand the request. If all of these requirements are not met, the triton request will fail.
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Question 55

What is the significance of A/B testing in ML software engineering?

Correct Answer: D
A/B testing in an ML engineering context is a controlled experimental methodology where two (or more) model variants - for example, a current production model (A) and a candidate replacement (B) - are deployed simultaneously to randomly assigned, statistically comparable segments of live traffic, and their real- world performance is compared on business or task-relevant metrics (conversion rate, click-through rate, task accuracy, latency-adjusted engagement). This provides causal evidence of which model performs better under actual production conditions, which offline evaluation on static held-out datasets cannot fully capture, since production data distributions shift and downstream user behavior interacts with model outputs in ways offline metrics miss.
Option A narrows A/B testing incorrectly to UI changes alone; while A/B testing originated in and remains common for UI/UX experimentation, its application in ML engineering explicitly extends to comparing model versions, algorithms, and feature sets - not just interface elements. Option B misattributes a distinct methodology (systematic hyperparameter search, covered in the previous question) to A/B testing, which evaluates already-trained model variants rather than searching a hyperparameter space. Option C is simply incorrect - A/B testing is a cornerstone of responsible ML deployment and MLOps practice, gating rollout decisions before full production release.
Reference: Experimentation domain - A/B testing, online evaluation, controlled experimentation in production ML.
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