SAA-C03 Design High-Performing Architectures Practice Question
This SAA-C03 practice question tests your understanding of design high-performing architectures. Read the scenario carefully and evaluate each option against the stated constraints before committing to an answer. A key principle to apply: rDS Read Replicas are asynchronous copies of a primary database instance.. Once you have made your selection, read the full explanation to reinforce the concept and understand why each distractor is designed to mislead on exam day.
A telemetry pipeline uses RDS MySQL and receives many read-only reporting queries that slow down the primary database. What should the architect add? The architecture review board prefers a managed AWS-native control.
Clue words in this question
Noticing these words before you look at the options changes how you read each choice.
Clue: "primary"
Why it matters: Asks for the main purpose or function, not a secondary benefit. Eliminate answers that describe side-effects or partial functions.
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
RDS read replica and route reporting queries to it
The correct answer is B because RDS read replicas are designed specifically to offload read-heavy workloads like reporting queries from the primary database. They provide an asynchronous read-only copy of the database that can handle SELECT statements without impacting the primary's write performance. This is a fully managed AWS-native solution that aligns with the architecture review board's preference.
Key principle: RDS Read Replicas are asynchronous copies of a primary database instance.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
✗
Multi-AZ standby and route reads to the standby
Why it's wrong here
The Multi-AZ standby is not used for normal read scaling.
✓
RDS read replica and route reporting queries to it
Why this is correct
Read replicas offload read traffic from the primary instance.
Clue confirmation
The clue word "primary" in the question point toward this answer.
Related concept
RDS Read Replicas are asynchronous copies of a primary database instance.
✗
S3 lifecycle policy
Why it's wrong here
Lifecycle policies manage object storage cost, not RDS read load.
✗
A larger NAT gateway
Why it's wrong here
NAT throughput does not solve database read contention.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is confusing Multi-AZ standby (which is for failover only) with read replicas (which are for read scaling), leading candidates to incorrectly choose Option A.
Detailed technical explanation
How to think about this question
RDS read replicas use MySQL's native asynchronous replication to maintain a near-real-time copy of the database, allowing the primary to focus on writes while replicas handle SELECT statements. They can be promoted to a standalone instance in case of primary failure, but this breaks replication. In a real-world scenario, heavy reporting queries with complex joins or aggregations can cause replication lag on the read replica, which must be monitored using the 'ReplicaLag' CloudWatch metric to ensure data freshness requirements are met.
KKey Concepts to Remember
RDS Read Replicas are asynchronous copies of a primary database instance.
They are used to offload read-heavy workloads from the primary database.
Read Replicas can be promoted to a standalone database instance if needed.
They support cross-Region and cross-AZ replication for disaster recovery and read scaling.
TExam Day Tips
→Watch for words such as best, first, most likely and least administrative effort.
→Review why wrong options are wrong, not only why the correct option is correct.
Key takeaway
RDS Read Replicas are asynchronous copies of a primary database instance.
Real-world example
How this comes up in practice
A media company stores terabytes of video archives that are accessed once a year for audit purposes. Moving these objects to a cold storage tier (Azure Archive, S3 Glacier, or Google Nearline) costs a fraction of hot storage. Questions like this test whether you understand storage tiers, access frequency tradeoffs, and retrieval latency requirements.
What to study next
Got this wrong? Here's your next step.
Review rDS Read Replicas are asynchronous copies of a primary database instance., then practise related SAA-C03 questions on the same topic to reinforce the concept.
Design High-Performing Architectures — This question tests Design High-Performing Architectures — RDS Read Replicas are asynchronous copies of a primary database instance..
What is the correct answer to this question?
The correct answer is: RDS read replica and route reporting queries to it — The correct answer is B because RDS read replicas are designed specifically to offload read-heavy workloads like reporting queries from the primary database. They provide an asynchronous read-only copy of the database that can handle SELECT statements without impacting the primary's write performance. This is a fully managed AWS-native solution that aligns with the architecture review board's preference.
What should I do if I get this SAA-C03 question wrong?
Review rDS Read Replicas are asynchronous copies of a primary database instance., then practise related SAA-C03 questions on the same topic to reinforce the concept.
Are there clue words in this question I should notice?
Yes — watch for: "primary". Asks for the main purpose or function, not a secondary benefit. Eliminate answers that describe side-effects or partial functions.
What is the key concept behind this question?
RDS Read Replicas are asynchronous copies of a primary database instance.
About these practice questions
Courseiva creates original exam-style practice questions with explanations and wrong-answer analysis. It does not publish real exam questions, exam dumps, or protected exam content. Learn why practice questions differ from exam dumps →
Share a tip, memory trick, or ask about the reasoning behind this question. Do not post real exam questions, leaked content, braindumps, or copyrighted exam material. Comments are moderated and may be removed without notice.
This SAA-C03 practice question is part of Courseiva's free Amazon Web Services certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the SAA-C03 exam.
Question Discussion
Share a tip, memory trick, or ask about the reasoning behind this question. Do not post real exam questions, leaked content, braindumps, or copyrighted exam material. Comments are moderated and may be removed without notice.
Sign in to join the discussion.