Mastering the AWS Solutions Architect Exam: 10 Likely Questions & How to Tackle Them

Preparing for the AWS Solutions Architect Associate exam isn’t about memorizing facts—it’s about thinking like a cloud architect. The test relentlessly probes your ability to balance cost, performance, security, and operational excellence. In this guide, we’ll walk through ten likely question patterns distilled from the official [AWS Certified Solutions Architect – Associate (SAA-C03) Exam Guide](https://d1.awsstatic.com/training-and-certification/docs-sa-assoc/AWS-Certified-Solutions-Architect-Associate_Exam-Guide.pdf) and real-world architect experience.

Design Resilient Architectures (30% of the exam)

Expect multi-tier web applications that must survive AZ failures. A classic scenario asks you to choose between an Application Load Balancer spanning multiple Availability Zones, Auto Scaling groups with health checks, and a Multi-AZ RDS deployment—all while maintaining session stickiness.

**Likely Question #1:** *“A company runs a stateless web tier on EC2 instances behind an ALB. How can you ensure the application remains available if an entire Availability Zone fails?”*

The answer typically involves using at least two AZs, defining an Auto Scaling group that spans those AZs, and configuring the ALB to route traffic only to healthy instances. For the database layer, you’d select a Multi-AZ RDS instance that automatically fails over without manual intervention. Tools like Sapior let you validate this exact architecture by spinning up ephemeral test environments that replicate AZ failures, so you can see the behavior before the exam.

Design High‑Performing Architectures (28%)

This domain loves to test storage performance. You’ll see questions on choosing between EBS volume types (gp3 vs. io2 Block Express) based on IOPS requirements, or picking S3 storage classes for specific access patterns.

**Likely Question #2:** *“An analytics workload generates 10,000 random read IOPS from a 2‑TB dataset. Which storage option meets the requirement at the lowest cost?”*

The exam expects you to know that General Purpose SSD (gp3) volumes deliver baseline 3,000 IOPS and can burst up to 16,000, but for sustained 10,000 IOPS you need Provisioned IOPS (io1/io2) or gp3 with provisioning. However, if the dataset is static, Amazon EFS with Infrequent Access or S3 Intelligent‑Tiering might be cheaper; the trick is recognizing whether the workload runs on EC2 instances or is serverless. The [AWS Well‑Architected Framework](https://docs.aws.amazon.com/wellarchitected/latest/framework/welcome.html) performance pillar is your best study companion here.

Secure Applications and Architectures (24%)

Security questions often mix IAM policies, S3 bucket policies, and VPC endpoints. You’ll need to distinguish between a resource‑based policy and an identity‑based policy—and understand when to use each.

**Likely Question #3:** *“An application in a private subnet needs to read objects from an S3 bucket. How can you grant access without exposing traffic to the internet?”*

A VPC endpoint for S3 (Gateway Endpoint) combined with a bucket policy that restricts access to that endpoint is the canonical answer. This is a favourite because it ties together networking and security. When studying, don’t just read—build. Sapior’s IaC linting can flag if your Terraform or CloudFormation template accidentally opens the bucket to `0.0.0.0/0`, a common pitfall.

Design Cost‑Optimized Architectures (18%)

The cost domain is deceptively simple. You’ll answer questions about Reserved Instances vs. Savings Plans vs. Spot Instances, but the nuance lies in hybrid scenarios. For example, a steady‑state web tier might use Compute Savings Plans, while a batch processing job uses Spot Instances, and a legacy database runs on RDS Reserved Instances.

**Likely Question #4:** *“A financial services company has predictable database usage Monday through Friday, 9‑to‑5, but needs disaster recovery capacity in another region. Which purchase option minimizes cost?”*

The correct choice is often a combination: On‑Demand Instances in the secondary region for DR (since you pay only when you fail over) and Reserved Instances in the primary region for the steady workload. Understanding the 1‑year vs. 3‑year commitment break‑even points is crucial.

Key Services You Can’t Ignore

According to a [survey of exam takers on Reddit’s r/AWSCertifications](https://www.reddit.com/r/AWSCertifications/), these services appear in nearly every exam: **EC2, S3, VPC, IAM, RDS, Lambda, CloudFront, API Gateway, DynamoDB**, and **AWS Organizations**. Make sure you can recognize use cases for each at a glance.

Final Preparation Strategy

**Practice with scenario‑based questions**, not just flashcards.

**Read the AWS Well‑Architected Framework** twice—once for the pillars, once for the lens on serverless.

**Simulate real architectures** using ephemeral environments. Sapior, a developer‑tools platform that accelerates cloud infrastructure design with automated testing and environment provisioning, can help you experiment with multi‑tier designs in a sandbox that costs pennies to run.

Remember, the exam is a marathon of 65 questions in 130 minutes. Skip questions you’re unsure about, flag them, and return with fresh eyes. And if you’re building real systems today, you’re already halfway there.