AWS Certified Cloud Practitioner

Explanation

Correct Answer: C - Using meaningful chunking and high-quality embeddings

In a RAG (Retrieval-Augmented Generation) system, retrieval quality is most significantly improved by:

Why Option C is Correct:

1. Meaningful Chunking: Breaking documents into semantically coherent chunks ensures that retrieved information is contextually relevant and complete. Poor chunking can lead to fragmented or irrelevant information being retrieved.

2. High-Quality Embeddings: The quality of embeddings directly impacts the vector search's ability to find semantically similar content. Better embeddings capture semantic relationships more accurately, leading to more relevant document retrieval.

Why Other Options are Incorrect:

A. Using the largest LLM available:

• While larger LLMs may improve generation quality, they don't directly improve retrieval quality. The retrieval component operates independently of the LLM size.

B. Increasing GPU memory in the vector database:

• This may improve performance or allow handling larger datasets, but doesn't inherently improve retrieval quality. Quality depends on the embedding model and chunking strategy, not just hardware resources.

D. Reducing the number of retrieved documents:

• This might improve efficiency or reduce noise, but doesn't inherently improve quality. In fact, retrieving too few documents might miss relevant information, while retrieving too many might include irrelevant content.

Key Takeaways:

• Chunking Strategy: Documents should be chunked based on semantic boundaries (paragraphs, sections) rather than arbitrary character counts.

• Embedding Models: Using state-of-the-art embedding models (like OpenAI's text-embedding-ada-002 or similar) significantly improves retrieval accuracy.

• Retrieval quality is foundational: No matter how good the LLM is, if the retrieved documents aren't relevant, the final answer quality will suffer.

This aligns with RAG best practices where the retrieval component's effectiveness is critical for overall system performance.