AWS SAA-C03 Study Guide: What to Actually Learn

AWS SAA-C03 Study Guide: What to Actually Learn

Most "SAA-C03 study guide" posts start with a giant checklist of every AWS service and hope you memorize it. That's backwards. AWS publishes an official exam guide with exact domain weightings — start there, because it tells you exactly where the exam actually spends its questions.

What the exam is testing

The AWS Certified Solutions Architect – Associate (SAA-C03) validates your ability to design solutions on AWS: secure, resilient, high-performing and cost-optimized architectures, and reviewing existing solutions for improvements. It's scenario-based — most questions describe a business requirement and ask you to pick the AWS service or configuration that satisfies it, not to recite service names.

The four domains, and their exact weight

This is the single most useful piece of information for planning your study time, straight from AWS's exam guide:

Domain	Weight
1. Design Secure Architectures	30%
2. Design Resilient Architectures	26%
3. Design High-Performing Architectures	24%
4. Design Cost-Optimized Architectures	20%

Security is the single largest domain on the exam. If you only have time to go deep on one area, make it IAM, security groups vs. NACLs, KMS and data protection. We cover the networking half of that domain in AWS VPC networking basics for the SAA-C03 exam.

Exam format (from AWS's exam guide)

• 65 questions total — 50 are scored, 15 are unscored (AWS uses them to test future questions; you can't tell which is which, so treat every question as if it counts).
• Two question types: multiple choice (one correct answer, three distractors) and multiple response (two or more correct answers from five or more options).
• 130 minutes to complete the exam.
• Scored 100–1,000, with a passing score of 720.
• Compensatory scoring — you don't need to pass each domain individually, only the exam overall. A weak domain can be offset by a strong one.
• $150 USD, taken at a Pearson VUE testing center or as an online proctored exam.
• AWS recommends at least 1 year of hands-on experience designing cloud solutions before sitting the exam.

How to plan your study time

Given the domain weights, your study time should roughly track them — spending equal time on all four domains means under-preparing for security (30%) and over-preparing for cost optimization (20%). A reasonable split:

• Security (30%) — IAM policies and roles, security groups vs. NACLs, KMS, Secrets Manager, encryption at rest/in transit.
• Resilience (26%) — Multi-AZ vs. Multi-Region, RDS Multi-AZ vs. read replicas, Auto Scaling, backup/DR strategies, decoupling with SQS/SNS.
• Performance (24%) — Caching (CloudFront, ElastiCache), storage class selection, right-sizing compute, database performance patterns.
• Cost (20%) — Reserved/Spot pricing models, S3 storage classes and lifecycle rules, Cost Explorer and Trusted Advisor.

Don't just read — answer scenario questions

The exam is scenario-based, so reading a service's feature list doesn't prepare you for it the way answering "a company needs X, which service configuration achieves it" questions does. See how to approach AWS scenario-based exam questions for a walkthrough of how to break these down, then practice with real questions on AWS Certification Prep — it covers structured lessons, practice questions, timed assessments and guided labs across services including VPC, IAM, EC2, S3 and RDS, aimed at CLF-C02 and SAA-C03.

Frequently asked questions

How many questions are on the SAA-C03 exam?

65 total: 50 scored and 15 unscored. The unscored questions aren't identified, so answer every question as if it counts toward your score.

What is the passing score for SAA-C03?

720, on a scaled score of 100–1,000. Scoring is compensatory, meaning you only need to pass the exam overall — not each individual domain.

How long is the SAA-C03 exam?

130 minutes, taken at a Pearson VUE testing center or as an online proctored exam, per AWS's own certification page.

Which domain should I study first?

Design Secure Architectures — at 30% of scored content it's the single largest domain, ahead of Resilient Architectures (26%), High-Performing Architectures (24%) and Cost-Optimized Architectures (20%).