SAA-C03 practice questions

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Yes. All 15 SAA-C03 practice questions on this page are free, with instant scoring and a written explanation for each answer. You do not need an account and there is no time limit.

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Q: Are these questions the same as the real SAA-C03 exam?

No. These are original practice questions written to match the published exam objectives and difficulty. They are not real exam questions — sharing or reproducing live exam content breaches every certification body's candidate agreement and can void your certification.

Q: How should I use this practice test?

Use it as a readiness check rather than a study tool. Work through the questions without notes, read the explanation for every answer including the ones you got right, and treat any domain where you miss more than a third as the area to revise before booking your exam.

Question 1

An application running on an Amazon EC2 instance needs to read and write objects in an Amazon S3 bucket. Which approach follows AWS security best practices for granting this access?

Accepted Answer

IAM roles deliver automatically rotated temporary credentials to the instance through the instance metadata service, so no long-term keys are ever stored on disk. Embedding access keys or root credentials creates permanent secrets that can be leaked and must be manually rotated.

Question 2

A solutions architect must enable encryption at rest for an existing unencrypted Amazon RDS for MySQL production database with minimal downtime. What should the architect do?

Accepted Answer

Encryption cannot be turned on for an existing RDS instance, so the supported path is to copy an unencrypted snapshot into an encrypted snapshot and restore a new instance from it. Read replicas of an unencrypted source cannot be encrypted, and Multi-AZ standbys inherit the source's encryption state.

Question 3

A company uses AWS Organizations with dozens of member accounts. Security requires that no principal in any member account — including account administrators and the root user — can stop logging or delete the organization CloudTrail trail. What is the most effective control?

Accepted Answer

An SCP sets the maximum available permissions for every principal in the affected accounts, including the member account root user, so the deny cannot be overridden locally. IAM policies and permissions boundaries are applied inside each account and can be modified or bypassed by an account administrator, and log file validation only detects tampering after the fact.

Question 4

What is the primary purpose of deploying an Amazon RDS DB instance in a Multi-AZ configuration?

Accepted Answer

Multi-AZ maintains a synchronous standby replica in a second Availability Zone and fails the DNS endpoint over to it automatically during an outage or maintenance event. Scaling reads is the job of read replicas, not the Multi-AZ standby.

Question 5

An e-commerce application sends orders directly from its web tier to a fleet of EC2 processing instances over HTTP. During flash sales the processing fleet becomes overwhelmed and some orders are lost. Which change best improves durability and decouples the tiers?

Accepted Answer

An SQS queue durably buffers order messages so bursts are absorbed rather than dropped, and consumers process at their own rate while Auto Scaling reacts to queue depth. Load balancing or larger instances still lose requests once capacity is saturated, and SNS HTTP fan-out delivers without persistent buffering for slow consumers.

Question 6

A financial services application backed by Amazon Aurora MySQL must survive a full Region failure with an RPO of under 1 minute and an RTO of under 15 minutes, while keeping standby costs as low as possible. Which disaster recovery design meets these requirements?

Accepted Answer

Aurora global database replicates with typical sub-second lag and supports managed failover in about a minute, and a scaled-down pilot light application tier keeps standby cost low while still meeting a 15-minute RTO. Hourly snapshot copies violate the RPO, and an active-active multi-site design meets the objectives but at far higher cost than required.

Question 7

A company hosts a static marketing website in an Amazon S3 bucket. Users in Europe and Asia report slow page loads because the bucket is in us-east-1. What is the simplest way to improve performance for global users?

Accepted Answer

CloudFront caches the static content at edge locations worldwide so requests are served close to the viewer instead of traveling to us-east-1. Transfer Acceleration optimizes uploads to a bucket, and storage classes affect cost, not latency.

Question 8

A read-heavy application repeatedly issues identical queries against an Amazon DynamoDB table and now requires microsecond read latency without changing the application's DynamoDB API calls. Which solution should the architect recommend?

Accepted Answer

DAX is a DynamoDB-native, in-memory write-through cache that delivers microsecond reads and is API-compatible, so only the endpoint changes. ElastiCache would achieve similar latency but requires application rewrites, and more capacity or an index still yields single-digit millisecond reads.

Question 9

A research team runs a tightly coupled MPI simulation across 40 EC2 instances. The job is bottlenecked by node-to-node communication and requires the lowest possible network latency and highest packet-per-second throughput. Which combination should the architect implement?

Accepted Answer

A cluster placement group packs instances onto the same high-bisection-bandwidth network segment in one AZ, and an EFA bypasses the OS kernel to give MPI workloads the lowest latency available. Spread and partition placement groups deliberately separate instances for fault isolation, which increases inter-node latency.

Question 10

A company runs a steady, predictable production workload on EC2 instances 24 hours a day and expects to keep running it for the next three years. Which purchasing option minimizes compute cost?

Accepted Answer

A three-year all-upfront Savings Plan gives the deepest discount over On-Demand pricing in exchange for a committed hourly spend, which fits a constant long-running workload. Spot capacity can be interrupted and is unsuitable for steady production baselines, while Dedicated Hosts carry a premium.

Question 11

A company stores millions of objects in Amazon S3. Access patterns are unpredictable — some objects are read constantly while others go untouched for months — and the business will not accept any retrieval delay or availability impact. What is the most cost-effective storage approach?

Accepted Answer

S3 Intelligent-Tiering automatically shifts objects between frequent and infrequent access tiers based on observed usage with no retrieval fees and millisecond access in both tiers, which is exactly the unpredictable-access use case. Standard-IA charges retrieval fees and a 30-day minimum, and lifecycle rules cannot promote objects back on read.

Question 12

EC2 instances in private subnets download several terabytes of data per month from an Amazon S3 bucket in the same Region. The bill shows very high NAT gateway data processing charges. What change reduces cost the most?

Accepted Answer

A gateway VPC endpoint routes S3 traffic over the AWS network at no hourly or data processing charge, eliminating the NAT gateway fees entirely while keeping the instances private. A NAT instance shifts cost rather than removing it, and public subnets sacrifice the private network posture.

Question 13

Which statement correctly describes the difference between a security group and a network ACL in an Amazon VPC?

Accepted Answer

A security group automatically permits return traffic for an allowed connection and evaluates every rule as an allow list at the ENI level, whereas a network ACL is stateless at the subnet boundary and processes numbered allow and deny rules in order. The remaining options invert those properties.

Question 14

A company transfers large nightly datasets between its on-premises data center and a VPC. The current site-to-site VPN over the internet delivers inconsistent throughput, and the business requires predictable bandwidth and consistent latency. What should the solutions architect recommend?

Accepted Answer

Direct Connect provides a private, dedicated physical circuit with committed bandwidth and stable latency because traffic never traverses the public internet. Additional VPN tunnels, DataSync, or a transit gateway still ride the internet path and inherit its variability.

Question 15

A SaaS provider must expose an internal application to hundreds of customer VPCs across many AWS accounts. Several customers use CIDR blocks that overlap with the provider's VPC, and the provider must not expose the service to the internet or manage per-customer routing. Which solution meets these requirements?

Accepted Answer

PrivateLink exposes the service through interface endpoints in each consumer VPC, so traffic stays on the AWS network, no route table entries are needed, and overlapping CIDRs are irrelevant because the endpoint ENI uses the consumer's own address space. VPC peering and Transit Gateway both require non-overlapping CIDRs and per-attachment routing, and an internet-facing ALB violates the private requirement.

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