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AWS Certified Solutions Architect - Associate (SAA-C03)

AWS architecture exam section for SAA-C03, focused on service selection, high availability, security, networking, storage, and cost-performance trade-offs.

This guide is for candidates preparing for AWS Certified Solutions Architect - Associate (SAA-C03) and for readers who need a stronger review of AWS design trade-offs. The exam is not a service flash-card test. It is a decision test: choose the right storage, networking, database, compute, resiliency, and cost pattern under an explicit constraint such as latency, operational effort, failure tolerance, or security.

Current exam snapshot

AWS’s current SAA-C03 exam guide states:

  • 65 questions in 130 minutes
  • 50 scored questions plus 15 unscored
  • 720 passing score on a scaled 100-1000 range
  • recommended candidate profile: about 1 year of hands-on AWS solution-design experience

AWS’s current exam guide breaks SAA-C03 into four weighted domains:

  • 1. Secure Architectures: 30%
  • 2. Resilient Architectures: 26%
  • 3. High-Performing Architectures: 24%
  • 4. Cost-Optimized Architectures: 20%

This guide follows that structure directly.

How to use this guide well

    flowchart LR
	  S["Study Plan"] --> D["Domain chapters"]
	  D --> L["Lesson pages"]
	  L --> C["Cheat Sheet and Glossary"]
	  C --> M["Mixed mocks and miss-log review"]
	  M --> R["Resources for final scope check"]

What to notice:

  • the main lesson pages are where you learn the architecture logic
  • the appendices are support layers, not replacements for the chapter work
  • mixed mocks should happen after you already have domain-level judgment, not before

Use one of these paths:

  • if you want a paced build, start with the study plan
  • if you already know AWS services but miss scenario questions, go straight into the four domain chapters and keep the cheat sheet open
  • if you are close to exam day, use the faq, glossary, and resources to tighten scope and eliminate avoidable mistakes

Coverage map against the current exam guide

DomainWeightWhat to master in this guide
1. Secure Architectures30%1.1 Secure Access, 1.2 Secure Workloads & Applications, 1.3 Data Security Controls
2. Resilient Architectures26%2.1 Scalable & Loosely Coupled, 2.2 Highly Available & Fault-Tolerant
3. High-Performing Architectures24%3.1 Storage Solutions, 3.2 Compute Solutions, 3.3 Database Solutions, 3.4 Network Architectures, 3.5 Data Ingestion & Transformation
4. Cost-Optimized Architectures20%4.1 Storage Solutions, 4.2 Compute Solutions, 4.3 Database Solutions, 4.4 Network Architectures

Cross-domain patterns you should expect repeatedly

These are the same decisions that keep reappearing in different clothing:

  • gateway endpoint vs NAT for private AWS service access
  • Multi-AZ vs read replica for availability versus read scale
  • ALB vs NLB for Layer 7 versus Layer 4 routing
  • CloudFront vs Global Accelerator for HTTP edge caching versus fast network entry
  • RDS or Aurora vs DynamoDB for relational workload shape versus key-value scale
  • SQS vs SNS vs EventBridge for queueing, fan-out, and event routing

Use the appendices as support layers rather than substitutes for the main guide:

  • Cheat Sheet for last-mile decision tables
  • Glossary when similar AWS terms blur together
  • FAQ for exam logistics and common traps
  • Resources for the official AWS exam guide and primary docs

If you only have time for one final pass before mocks, spend it on Secure Architectures and Resilient Architectures first. Those two domains carry the most weight and also influence how many performance and cost questions are solved.

In this section

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