1Z0-1127-25 Fundamentals of Large Language Models Practice Question
An organization is implementing a RAG system using OCI GenAI. Which two are best practices for optimizing retrieval and generation? (Choose two.)
⚠ Common exam trap
Oracle often tests the misconception that retrieval and generation should share the same model, but in practice they are optimized separately, and candidates may confuse 'embedding model' with 'generation model' in a RAG context.
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Use semantic search (embeddings) for document retrieval
Semantic search using embeddings retrieves documents based on meaning rather than keyword matching, which significantly improves the relevance of context provided to the LLM in a RAG system. This aligns with best practices for OCI GenAI, where embedding models convert text into vector representations for similarity search in a vector database.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Use the same embedding model for both retrieval and generation
Why it's wrong here
Different models may be optimized for different tasks; using the same is not a best practice.
- ✗
Store all documents in a single large index
Why it's wrong here
A single large index can cause slower retrieval and lower precision; splitting by topic is better.
- ✓
Use semantic search (embeddings) for document retrieval
Why this is correct
Semantic search captures meaning beyond keywords, improving relevance.
- ✓
Implement caching for frequently asked questions
Why this is correct
Caching reduces redundant computations and latency.
- ✗
Disable summarization to save inference costs
Why it's wrong here
Summarization can improve user experience and may be necessary; disabling it solely for cost is not a best practice.
Go deeper
Related to this question
About these practice questions
One of 768 original 1Z0-1127-25 practice questions on Courseiva, each with a full explanation and wrong-answer analysis — not exam dumps or protected exam content. Learn why practice questions differ from exam dumps →
JA
Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
This 1Z0-1127-25 practice question is part of Courseiva's free Oracle certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the 1Z0-1127-25 exam.