OCI 2025 Generative AI Professional Exam Study Guide

Exam Logistics

What Changed from 1Z0-1127-24

The 2025 version is a significant update:

• Question count: 40 → 50 questions
• Domain structure: 3 domains → 4 domains
• New domain: "Using OCI Generative AI RAG Agents Service" (Domain 4) was split out from the previous "Building LLM Applications" domain
• RAG coverage expanded: RAG topics now span two domains (3 and 4) totaling 40% of the exam, up from 35%
• Oracle Database 23ai: Explicit coverage of vector search integration
• Agent orchestration: New topics on agent creation, deployment, and tool integration
• Hands-on labs: 6 self-paced labs added to the training course

Domain Study Guides

Study Strategy

Time Allocation by Domain Weight

With 90 minutes for 50 questions, you have ~1.8 minutes per question. Allocate study time proportionally:

Study Order

1. Start with Domain 1 (LLM Fundamentals) -- foundational concepts that everything else builds on
2. Then Domain 2 (OCI GenAI Service) -- the service itself, models, fine-tuning, inference
3. Then Domain 3 (RAG Implementation) -- hands-on RAG with LangChain and Oracle 23ai
4. Finish with Domain 4 (RAG Agents) -- the managed service that automates much of Domain 3

Domain 3 and 4 are closely related. Domain 3 covers building RAG manually with LangChain; Domain 4 covers using the managed Agents service. Understanding the manual approach first makes the managed service easier to grasp.

Key Focus Areas

• Domain 2 is 40% of the exam. You cannot pass without solid knowledge of the OCI GenAI Service, its models, fine-tuning workflows, and inference parameters.
• T-Few fine-tuning is Oracle's distinctive approach. Expect multiple questions on how it works and when to use it.
• RAG architecture (Domains 3 + 4 combined = 40%) is heavily tested. Know the full pipeline: load, split, embed, store, retrieve, generate.
• Oracle Database 23ai vector search appears across Domains 3 and 4. Know the SQL syntax, distance functions, and index types.
• Cohere and Meta Llama model families: Know which models are available for what purpose (chat, embedding, fine-tuning).

Primary Study Materials

Official Oracle Resources

Practice Exams

Community Resources

Cost and Vouchers

• Exam fee: $245 USD
• Retake policy: Wait 14 days between attempts
• Oracle University subscriptions include practice exams and learning paths
• Oracle Cloud Free Tier provides hands-on access to OCI GenAI service for practice
• Check the Oracle Certification Discount Page for available vouchers

References

• 1Z0-1127-25 Exam Page (Oracle University)
• Certification Track Page
• Oracle MyLearn Exam Registration
• 1Z0-1127-25 Syllabus (DBExam)
• Oracle AI Training Hub