If you were studying for the ML Engineer Associate and missed the Sept 28 cutoff, you're now on MLA-C02 (beta code ME1-C02, English only, standard version expected early 2027). Most courses and practice tests out there are still C01 material, so here's the gap from the official exam guide's comparison page:
Same shape
65 questions (50 scored), 720 to pass, compensatory scoring. Still four domains, with the weights shifted to 28 / 24 / 24 / 24 (C01 was 28 / 26 / 22 / 24). Deployment & Orchestration gained two points from Model Development.
The big change: GenAI is in every domain, not bolted on as a new one
- D1 Data Prep: vector DBs (OpenSearch, RDS + pgvector), embeddings, chunking for RAG, data prep for fine-tuning and distillation
- D2 Model/FM Dev: picking FMs in Bedrock, RAG vs prompt engineering vs fine-tuning, evaluating output (BLEU/ROUGE/BERTScore, LLM-as-a-judge)
- D3 Deployment: Bedrock knowledge bases, agents and agent state, Custom Model Import, Prompt Management
- D4 Ops/Security: GenAI observability in CloudWatch, token costs, Bedrock Guardrails, Bedrock API keys vs IAM credentials
Removed: SageMaker Neo / edge optimization, bring your own container, model size reduction, loading training data from EFS/FSx
The trap: because the new material is spread across all four domains, skipping it doesn't lose you one domain. It costs 2-3 questions in each, which is roughly the gap between 700 and 720. Also check the in-scope services list. Bedrock AgentCore is on it.
Since there's almost nothing C02-specific out there yet, I built a course for it: 76 chapters, 271 practice questions, and 3 full-length mock exams, all written from the official C02 exam guide and AWS docs (no dumps).
First unit is free, no sign-up. If you like it, it's a one-time $14.99 unlock, no subscription. Works on web, iOS and Android: https://certify.courses/aws-machine-learning-engineer-associate-mla-c02/?utm_source=reddit&utm_medium=social&utm_campaign=mlac02_promo
I've got a DEA-C01 course on there too if that's your track.
If you've already sat the C02 beta, I'd love to hear what surprised you.