AWS replaced SAA-C02 with SAA-C03 in August 2022. Two years later, I still get the same question from candidates every week: how different is it, really? I maintain a question library for both generations — 520 SAA-C03 items, plus the legacy SAA-C02 bank we keep around for reference — and I audited both side-by-side again last month. Here is the honest answer.
The short version
About 70% of the SAA-C03 content is the same as SAA-C02. 20% is rebranded or reweighted. 10% is genuinely new. Anyone who studied C02 carefully and is now prepping for C03 should plan on 15–20 hours of delta, not a full re-study.
Domain weights changed
The biggest surface change is the blueprint itself:
| Domain | C02 | C03 | Shift |
|---|---|---|---|
| Design resilient architectures | 30% | 26% | ↓ 4% |
| Design high-performing architectures | 28% | 24% | ↓ 4% |
| Design secure applications & architectures | 24% | 30% | ↑ 6% |
| Design cost-optimized architectures | 18% | 20% | ↑ 2% |
Security ate six points, mostly from resilience and performance. In practice, that means questions about KMS key policies, SCPs, IAM boundary policies, and private networking patterns are noticeably more common on C03.
What genuinely moved
These are the services I see far more often on SAA-C03 than I did on C02:
- AWS Organizations + SCPs. On C02 you could get through with one or two questions. C03 tests SCP logic, OU structures, and multi-account guardrails across 5–8% of a typical bank.
- Aurora Serverless v2. v1 was barely tested. v2 is in roughly every other exam form now, and the question is almost always "when do you pick v2 over a provisioned cluster."
- S3 Glacier Instant Retrieval. Launched late 2021, still new at C02 cutoff. On C03, it is the default "needs access within milliseconds but rarely" answer.
- FSx variants. FSx for NetApp ONTAP, OpenZFS, Windows File Server, Lustre — the distinction between them is a recurring trap. Candidates who lumped all FSx into one bucket for C02 now fail these questions.
- Transit Gateway vs VPC peering. C02 let you pick either for small topologies. C03 routinely introduces a third account or a third region in the scenario, which nudges the correct answer toward Transit Gateway.
What was rebranded, not replaced
A handful of topics look new but are really the same thing in different clothing:
- "Design for fault tolerance" → "Design resilient architectures"
- "Decoupled architectures" is now a sub-objective, not a standalone domain, so SQS + SNS questions got folded into resilience scenarios rather than isolated.
- S3 replication questions now routinely mention SRR vs CRR vs batch replication, where C02 treated them as one topic.
If your SAA-C02 notes are well-organized, you will recognize the content under the new section names.
What is genuinely new
Four things that were not testable on C02 and are testable now:
- AWS Backup cross-Region + cross-account. The exam expects you to know this exists and when to reach for it instead of per-service backup.
- CloudWatch Logs Insights + Contributor Insights as a diagnostic pattern for observability questions.
- Compute Optimizer recommendations. Rare, but when it shows up, the answer is almost always "run Compute Optimizer first."
- AWS DataSync over Snowball. Small migrations that could go either way on C02 now favor DataSync.
What dropped off the map
Topics that used to show up on C02 and are effectively gone:
- SimpleDB. Deprecated for new accounts, no longer tested.
- EC2 Classic networking. Zero questions on a recent 500-item audit.
- CodeCommit-flavored deployment scenarios. Partial deprecation made it a risky test topic; the focus shifted to generic CI/CD patterns.
What the weight shift means for study time
If you are restarting from zero, focus your hours like this for SAA-C03:
- 30% of study time on security topics — KMS, IAM, SCPs, private networking
- 25% on resilience — Multi-AZ, replicas, Auto Scaling, Route 53 health checks
- 25% on performance — storage class selection, caching, database choice
- 20% on cost — Savings Plans, Reserved Instances, storage class transitions
If you are migrating from C02 study, spend most of your delta time on the four "genuinely new" items above and on the Aurora Serverless v2 / FSx variant distinctions. The rest of your C02 preparation still holds.
One thing that did not change
The exam format is still 65 questions, 130 minutes, 720/1000 pass mark, multiple-choice and multi-select. AWS has not touched that since SAA-C01.
If you took SAA-C02 in 2021 or 2022 and you are considering renewing via SAA-C03, expect the exam to feel 90% familiar. The 10% that changed is focused enough that a targeted plan beats a full rewrite. If you are starting fresh, use the C03 blueprint directly — there is no reason to study C02 material at this point, and the retired content will waste your time.