NCA-GENL Exam Questions and Answers

QUESTION: 9

How does A/B testing contribute to the optimization of deep learning models' performance and effectiveness in real-world applications? (Pick the 2 correct responses)

A/B testing helps validate the impact of changes or updates to deep learning models by statistically analyzing the outcomes of different versions to make informed decisions for model optimization.
A/B testing allows for the comparison of different model configurations or hyperparameters to identify the most effective setup for improved performance.
A/B testing in deep learning models is primarily used for selecting the best training dataset without requiring a model architecture or parameters.
A/B testing guarantees immediate performance improvements in deep learning models without the need for further analysis or experimentation.
A/B testing is irrelevant in deep learning as it only applies to traditional statistical analysis and not complex neural network models.

Answer(s): A,B

Explanation:

A/B testing is a controlled experimentation technique used to compare two versions of a system to determine which performs better. In the context of deep learning, NVIDIA's documentation on model optimization and deployment (e.g., Triton Inference Server) highlights its use in evaluating model performance:
Option A: A/B testing validates changes (e.g., model updates or new features) by statistically comparing outcomes (e.g., accuracy or user engagement), enabling data-driven optimization decisions.
Option B: It is used to compare different model configurations or hyperparameters (e.g., learning rates or architectures) to identify the best setup for a specific task. Option C is incorrect because A/B testing focuses on model performance, not dataset selection. Option D is false, as A/B testing does not guarantee immediate improvements; it requires analysis. Option E is wrong, as A/B testing is widely used in deep learning for real-world applications.

Reference:

NVIDIA Triton Inference Server Documentation: https://docs.nvidia.com/deeplearning/triton-

inference-server/user-guide/docs/index.html

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QUESTION: 10

You are working on developing an application to classify images of animals and need to train a neural model. However, you have a limited amount of labeled dat

Which technique can you use to leverage the knowledge from a model pre-trained on a different task to improve the performance of your new model?
Dropout
Random initialization
Transfer learning
Early stopping

Answer(s): C

Explanation:

Transfer learning is a technique where a model pre-trained on a large, general dataset (e.g., ImageNet for computer vision) is fine-tuned for a specific task with limited data. NVIDIA's Deep Learning AI documentation, particularly for frameworks like NeMo and TensorRT, emphasizes transfer learning as a powerful approach to improve model performance when labeled data is scarce. For example, a pre-trained convolutional neural network (CNN) can be fine-tuned for animal image classification by reusing its learned features (e.g., edge detection) and adapting the final layers to the new task. Option A (dropout) is a regularization technique, not a knowledge transfer method. Option B (random initialization) discards pre-trained knowledge. Option D (early stopping) prevents overfitting but does not leverage pre-trained models.

Reference:

NVIDIA NeMo Documentation: https://docs.nvidia.com/deeplearning/nemo/user- guide/docs/en/stable/nlp/model_finetuning.html
NVIDIA Deep Learning AI: https://www.nvidia.com/en-us/deep-learning-ai/

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QUESTION: 11

What is the fundamental role of LangChain in an LLM workflow?

To act as a replacement for traditional programming languages.
To reduce the size of AI foundation models.
To orchestrate LLM components into complex workflows.
To directly manage the hardware resources used by LLMs.

Answer(s): C

Explanation:

LangChain is a framework designed to simplify the development of applications powered by large language models (LLMs) by orchestrating various components, such as LLMs, external data sources,

memory, and tools, into cohesive workflows. According to NVIDIA's documentation on generative AI workflows, particularly in the context of integrating LLMs with external systems, LangChain enables developers to build complex applications by chaining together prompts, retrieval systems (e.g., for RAG), and memory modules to maintain context across interactions. For example, LangChain can integrate an LLM with a vector database for retrieval-augmented generation or manage conversational history for chatbots. Option A is incorrect, as LangChain complements, not replaces, programming languages. Option B is wrong, as LangChain does not modify model size. Option D is inaccurate, as hardware management is handled by platforms like NVIDIA Triton, not LangChain.

Reference:

NVIDIA NeMo Documentation: https://docs.nvidia.com/deeplearning/nemo/user- guide/docs/en/stable/nlp/intro.html
LangChain Official Documentation: https://python.langchain.com/docs/get_started/introduction

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QUESTION: 12

What type of model would you use in emotion classification tasks?

Auto-encoder model
Siamese model
Encoder model
SVM model

Answer(s): C

Explanation:

Emotion classification tasks in natural language processing (NLP) typically involve analyzing text to predict sentiment or emotional categories (e.g., happy, sad). Encoder models, such as those based on transformer architectures (e.g., BERT), are well-suited for this task because they generate contextualized representations of input text, capturing semantic and syntactic information. NVIDIA's NeMo framework documentation highlights the use of encoder-based models like BERT or RoBERTa for text classification tasks, including sentiment and emotion classification, due to their ability to encode input sequences into dense vectors for downstream classification. Option A (auto-encoder) is used for unsupervised learning or reconstruction, not classification. Option B (Siamese model) is typically used for similarity tasks, not direct classification. Option D (SVM) is a traditional machine learning model, less effective than modern encoder-based LLMs for NLP tasks.

Reference:

NVIDIA NeMo Documentation: https://docs.nvidia.com/deeplearning/nemo/user- guide/docs/en/stable/nlp/text_classification.html

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QUESTION: 13

In the context of a natural language processing (NLP) application, which approach is most effective for implementing zero-shot learning to classify text data into categories that were not seen during training?

Use rule-based systems to manually define the characteristics of each category.
Use a large, labeled dataset for each possible category.
Train the new model from scratch for each new category encountered.
Use a pre-trained language model with semantic embeddings.

Answer(s): D

Explanation:

Zero-shot learning allows models to perform tasks or classify data into categories without prior training on those specific categories. In NLP, pre-trained language models (e.g., BERT, GPT) with semantic embeddings are highly effective for zero-shot learning because they encode general linguistic knowledge and can generalize to new tasks by leveraging semantic similarity. NVIDIA's NeMo documentation on NLP tasks explains that pre-trained LLMs can perform zero-shot classification by using prompts or embeddings to map input text to unseen categories, often via techniques like natural language inference or cosine similarity in embedding space. Option A (rule- based systems) lacks scalability and flexibility. Option B contradicts zero-shot learning, as it requires labeled data. Option C (training from scratch) is impractical and defeats the purpose of zero-shot learning.

Reference:

NVIDIA NeMo Documentation: https://docs.nvidia.com/deeplearning/nemo/user- guide/docs/en/stable/nlp/intro.html
Brown, T., et al. (2020). "Language Models are Few-Shot Learners."

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QUESTION: 14

Which technology will allow you to deploy an LLM for production application?

Git
Pandas
Falcon
Triton

Answer(s): D

Explanation:

NVIDIA Triton Inference Server is a technology specifically designed for deploying machine learning models, including large language models (LLMs), in production environments. It supports high- performance inference, model management, and scalability across GPUs, making it ideal for real- time LLM applications. According to NVIDIA's Triton Inference Server documentation, it supports frameworks like PyTorch and TensorFlow, enabling efficient deployment of LLMs with features like dynamic batching and model ensemble. Option A (Git) is a version control system, not a deployment tool. Option B (Pandas) is a data analysis library, irrelevant to model deployment. Option C (Falcon) refers to a specific LLM, not a deployment platform.

Reference:

NVIDIA Triton Inference Server Documentation: https://docs.nvidia.com/deeplearning/triton- inference-server/user-guide/docs/index.html

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QUESTION: 15

Which Python library is specifically designed for working with large language models (LLMs)?

NumPy
Pandas
HuggingFace Transformers
Scikit-learn

Answer(s): C

Explanation:

The HuggingFace Transformers library is specifically designed for working with large language models (LLMs), providing tools for model training, fine-tuning, and inference with transformer-based architectures (e.g., BERT, GPT, T5). NVIDIA's NeMo documentation often references HuggingFace Transformers for NLP tasks, as it supports integration with NVIDIA GPUs and frameworks like PyTorch for optimized performance. Option A (NumPy) is for numerical computations, not LLMs. Option B (Pandas) is for data manipulation, not model-specific tasks. Option D (Scikit-learn) is for traditional machine learning, not transformer-based LLMs.

Reference:

NVIDIA NeMo Documentation: https://docs.nvidia.com/deeplearning/nemo/user- guide/docs/en/stable/nlp/intro.html
HuggingFace Transformers Documentation: https://huggingface.co/docs/transformers/index

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QUESTION: 16

Transformers are useful for language modeling because their architecture is uniquely suited for handling which of the following?

Long sequences
Embeddings
Class tokens
Translations

Answer(s): A

Explanation:

The transformer architecture, introduced in "Attention is All You Need" (Vaswani et al., 2017), is particularly effective for language modeling due to its ability to handle long sequences. Unlike RNNs,

which struggle with long-term dependencies due to sequential processing, transformers use self- attention mechanisms to process all tokens in a sequence simultaneously, capturing relationships across long distances. NVIDIA's NeMo documentation emphasizes that transformers excel in tasks like language modeling because their attention mechanisms scale well with sequence length, especially with optimizations like sparse attention or efficient attention variants. Option B (embeddings) is a component, not a unique strength. Option C (class tokens) is specific to certain models like BERT, not a general transformer feature. Option D (translations) is an application, not a structural advantage.

Reference:

Vaswani, A., et al. (2017). "Attention is All You Need." NVIDIA NeMo Documentation: https://docs.nvidia.com/deeplearning/nemo/user- guide/docs/en/stable/nlp/intro.html

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NVIDIA NCA-GENL Exam (page: 2) NVIDIA Generative AI LLMs Updated on: 02-Jan-2026

QUESTION: 9

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QUESTION: 10

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QUESTION: 11

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QUESTION: 12

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QUESTION: 13

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QUESTION: 14

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QUESTION: 15

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QUESTION: 16

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NVIDIA NCA-GENL Exam (page: 2)
NVIDIA Generative AI LLMs
Updated on: 02-Jan-2026