The answer is ensuring data consistency between services that own their own databases, as this is one of the top challenges when migrating a monolithic application to a microservices architecture on AWS. In a monolith, a single database enforces ACID transactions, but microservices require each service to manage its own database, forcing you to rely on eventual consistency and distributed transaction patterns like Saga or two-phase commit, which introduce complexity and network latency. On the AWS Certified Solutions Architect Professional SAP-C02 exam, this challenge tests your understanding of how to decouple data stores while maintaining integrity, often appearing in scenarios involving Amazon DynamoDB, RDS, or SQS for compensating transactions. A common trap is confusing this with autoscaling, which is actually a benefit of microservices, not a challenge. Remember the mnemonic “DCN” for Data consistency, Coordination overhead, and Network latency—the three core hurdles you must architect around.
SAP-C02 Practice Question: Accelerate Workload Migration and Modernization
This SAP-C02 practice question tests your understanding of accelerate workload migration and modernization. Read the scenario carefully and evaluate each option against the stated constraints before committing to an answer. After answering, compare your reasoning against the explanation and wrong-answer breakdown below. 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.
Which THREE of the following are common challenges when migrating a monolithic application to a microservices architecture on AWS? (Choose three.)
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Managing distributed transactions across multiple services
Distributed transactions, data consistency, and network latency are well-known challenges. Autoscaling is a benefit. Single database bottleneck can be solved with polyglot persistence.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
✓
Managing distributed transactions across multiple services
Why this is correct
Distributed transactions require patterns like saga.
Related concept
Read the scenario before looking for a memorised answer.
✗
Single database bottleneck when all services share the same database
Why it's wrong here
Sharing a database defeats the purpose; each service should have its own database.
✓
Increased network latency due to inter-service communication
Why this is correct
Network calls add latency compared to in-process calls.
Related concept
Read the scenario before looking for a memorised answer.
✓
Ensuring data consistency between services that own their own databases
Why this is correct
Eventual consistency and saga patterns are needed.
Related concept
Read the scenario before looking for a memorised answer.
✗
Difficulty in scaling individual services independently
Why it's wrong here
Microservices enable independent scaling.
Common exam traps
Common exam trap: answer the scenario, not the keyword
Many certification questions include familiar terms but test a specific constraint. Read the exact wording before choosing an answer that is generally true but wrong for this case.
Detailed technical explanation
How to think about this question
This question should be treated as a scenario, not a definition check. Identify the problem, the constraint and the best action. Then compare each option against those facts.
KKey Concepts to Remember
Read the scenario before looking for a memorised answer.
Find the constraint that changes the correct option.
Eliminate answers that are true in general but not in this case.
Use explanations to understand the rule behind the answer.
TExam Day Tips
→Underline the problem statement mentally.
→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
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
How this comes up in practice
A healthcare organisation deploys an application with a public-facing web tier and a private database tier. The database subnet has no public IP and only accepts connections from the web tier's security group. Questions like this test whether you can design cloud network isolation using VNets/VPCs, subnets, and security group rules.
What to study next
Got this wrong? Here's your next step.
Identify which SAP-C02 exam domain this question belongs to, then review the specific concept being tested. Practise related questions in that domain and focus on understanding why each wrong answer is tempting — not just why the correct answer is right.
Accelerate Workload Migration and Modernization — This question tests Accelerate Workload Migration and Modernization — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Managing distributed transactions across multiple services — Distributed transactions, data consistency, and network latency are well-known challenges. Autoscaling is a benefit. Single database bottleneck can be solved with polyglot persistence.
What should I do if I get this SAP-C02 question wrong?
Identify which SAP-C02 exam domain this question belongs to, then review the specific concept being tested. Practise related questions in that domain and focus on understanding why each wrong answer is tempting — not just why the correct answer is right.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
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This SAP-C02 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 SAP-C02 exam.
Question Discussion
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