What is inside the 1Z0-1127 guide
150 practice questions
Original scenario questions mapped to every exam domain.
Every option explained
Why the answer is right and why each distractor is wrong.
Study plan
A week by week plan weighted by domain, plus a cheat sheet.
Interview questions
The questions employers ask for roles that need this certification.
About the 1Z0-1127 exam
Oracle Cloud Infrastructure Generative AI Professional (current version 1Z0-1127-26) (1Z0-1127) is the exam for the Oracle Cloud OCI Generative AI Professional certification. Our guide follows the official exam outline dated 2025 (1Z0-1127-25 published topics, checked November 2026).
| Current code | 1Z0-1127-26 |
| Length | 90 minutes |
| Questions | 50 multiple choice |
| Passing score | 68% |
1Z0-1127 exam domains and weights
| Domain | Weight |
|---|---|
| Fundamentals of Large Language Models (LLMs) | 20% |
| Using OCI Generative AI Service | 40% |
| Implement RAG using OCI Generative AI service | 20% |
| Using OCI Generative AI RAG Agents service | 20% |
Try 5 free 1Z0-1127 practice questions
Pick an answer to see the correct option and a full explanation.
A support team wants the same prompt to give the same, predictable answer every time it runs. Which decoding setting helps most?
Correct answer: B
Temperature 0 makes decoding close to greedy, so the most probable token wins each time and output becomes consistent. Higher temperature flattens the probability distribution and adds variety.
A startup wants to test several chat models in OCI Generative AI for a proof of concept, paying only for the calls it makes. Which serving option fits best?
Correct answer: D
On-demand mode is pay as you go for each inference call and suits experimentation and proofs of concept. Dedicated clusters need a time commitment.
What is the correct order of the main steps in a basic RAG pipeline?
Correct answer: A
RAG first ingests content (load, chunk, embed, store). At question time it embeds the query, retrieves the most similar chunks and passes them to the LLM to generate a grounded answer.
A team has a few hundred PDF policy files and wants a RAG agent without managing any vector database. Which knowledge base data store should they choose?
Correct answer: C
With an Object Storage data source, Generative AI Agents ingests, chunks, embeds and indexes the files for you. The other options are bring your own stores that you prepare.
Which statement best describes how a decoder only model such as a GPT style LLM generates text?
Correct answer: B
Decoder only models are autoregressive. Each new token is predicted from the prompt plus the tokens already generated, then added to the context for the next step.
Want the full 1Z0-1127 question bank?
The complete 1Z0-1127 study guide covers every exam domain with original questions, an explanation for every option, a four week study plan, a cheat sheet and interview questions. Get the complete guide.
A four week 1Z0-1127 study plan
- Week 1: LLM fundamentals (20%)
- Week 2: OCI Generative AI service (40%)
- Week 3: RAG with LangChain and Oracle AI Database (20%)
- Week 4: Generative AI Agents (20%) and review
Frequently asked questions
Are these real 1Z0-1127 exam questions?
No. Every question is original and written to the official 1Z0-1127 exam objectives. They match the style and difficulty of the exam without copying exam content.
Is this guide updated for the current 1Z0-1127 exam?
Yes. We review each guide whenever the provider changes the exam outline, and buyers get updated versions free.
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Can I try it before buying?
Yes. Answer the free practice questions on this page. Each one shows the correct answer and a full explanation, so you can judge the quality before you buy.