DOP-C02 Resilient Cloud Solutions Practice Question
This DOP-C02 practice question tests your understanding of resilient cloud solutions. 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.
A company uses Amazon DynamoDB with global tables for a multi-region active-active application. They notice that occasionally, concurrent updates to the same item in different regions cause data inconsistency. How can they resolve this?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Use conditional writes and design the application to handle conflicts
Option C is correct because DynamoDB global tables use an eventually consistent model for multi-region replication, meaning concurrent updates to the same item in different regions can lead to conflicts. Conditional writes allow the application to enforce a last-writer-wins (LWW) strategy or custom conflict resolution logic, ensuring data consistency by only applying updates that meet specified conditions (e.g., a version number or timestamp check). This approach aligns with the recommended practice for handling concurrent writes in an active-active global table setup.
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.
✗
Disable global tables and use a single region
Why it's wrong here
That removes the multi-region benefit.
✗
Use DynamoDB read replicas instead of global tables
Why it's wrong here
Read replicas are for read scaling, not write conflicts.
✓
Use conditional writes and design the application to handle conflicts
Why this is correct
Conditional writes prevent overwrites and allow conflict resolution.
Related concept
Read the scenario before looking for a memorised answer.
✗
Use DynamoDB Accelerator (DAX) to cache writes
Why it's wrong here
DAX does not resolve cross-region conflicts.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates often assume DynamoDB global tables automatically resolve all write conflicts, but the exam tests the understanding that without conditional writes or custom conflict resolution, concurrent updates can cause data inconsistency due to eventual consistency.
Detailed technical explanation
How to think about this question
Under the hood, DynamoDB global tables replicate changes asynchronously using a last-writer-wins (LWW) conflict resolution mechanism based on a timestamp or a custom conflict resolution strategy if you implement conditional writes. However, without application-level control, LWW can lead to data loss if two writes occur at nearly the same time in different regions, as the replication process may not preserve the intended order. A real-world scenario is a shopping cart application where two users update the same item quantity from different regions; using conditional writes with a version number ensures that only the intended update succeeds, and the application can retry or merge changes on conflict.
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.
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
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 cloud solutions architect for a retail company is evaluating services for a new workload. The correct answer here reflects best practice for the specific scenario described — not a general cloud recommendation. Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option. Cloud exam questions reward reading the constraint carefully: the same technology can be right or wrong depending on the use case.
What to study next
Got this wrong? Here's your next step.
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
Resilient Cloud Solutions — This question tests Resilient Cloud Solutions — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Use conditional writes and design the application to handle conflicts — Option C is correct because DynamoDB global tables use an eventually consistent model for multi-region replication, meaning concurrent updates to the same item in different regions can lead to conflicts. Conditional writes allow the application to enforce a last-writer-wins (LWW) strategy or custom conflict resolution logic, ensuring data consistency by only applying updates that meet specified conditions (e.g., a version number or timestamp check). This approach aligns with the recommended practice for handling concurrent writes in an active-active global table setup.
What should I do if I get this DOP-C02 question wrong?
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
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Question Discussion
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