1Z0-1127-25 Practice Question: Building LLM Applications with RAG and Vector Search
Which THREE factors directly influence the quality of responses in a RAG system? (Choose three.)
⚠ Common exam trap
Oracle certification exams often test the distinction between factors that directly influence response quality (prompt, chunk size, embedding model) versus factors that affect performance or output style (temperature, GPU count), leading candidates to mistakenly select temperature or hardware options.
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
✓
The prompt template used to ask the LLM
The prompt template directly controls how the LLM interprets the retrieved context and formulates its response. A well-structured prompt with clear instructions, context formatting, and output constraints significantly improves response relevance and accuracy, while a poorly designed prompt can lead to hallucinations or off-topic answers.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
The prompt template used to ask the LLM
Why this is correct
A well-structured prompt helps the LLM use the context properly.
- ✓
The chunk size used during document processing
Why this is correct
Chunk size determines how much context is in each retrieved piece.
- ✗
The temperature parameter of the LLM
Why it's wrong here
Temperature affects randomness, not the core retrieval quality.
- ✗
The number of GPUs allocated to the LLM
Why it's wrong here
GPU count affects speed but not response quality directly.
- ✓
The choice of embedding model
Why this is correct
Different models produce different vector spaces, impacting retrieval relevance.
Go deeper
Related to this question
About these practice questions
Courseiva writes every 1Z0-1127-25 question from scratch — 768 in total, each with an explanation and a wrong-answer breakdown. None are copied from real exams or dumps. 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.