DBS-C01 Management and Operations Practice Question
This DBS-C01 practice question tests your understanding of management and operations. 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 has an Amazon DynamoDB table that stores session data for a web application. The table's read capacity units (RCUs) are consistently near 100% utilization during peak hours, causing throttling. The application can tolerate eventually consistent reads. Which action should the application team take to reduce throttling?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Change the read consistency to eventually consistent.
Option A is correct because using eventually consistent reads consumes only half the RCUs compared to strongly consistent reads, effectively doubling the read capacity. Option B is wrong because DynamoDB Accelerator (DAX) is an in-memory cache that can reduce read load but does not directly address the RCU consumption for reads that still hit the table. Option C is wrong because increasing RCUs would solve throttling but increase costs unnecessarily if eventually consistent reads suffice. Option D is wrong because decreasing RCUs would worsen throttling.
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.
✗
Decrease the provisioned RCUs for the table.
Why it's wrong here
Decreasing RCUs would increase throttling.
✗
Enable DynamoDB Accelerator (DAX) to cache the session data.
Why it's wrong here
DAX reduces read load on the table but does not change the RCU consumption for reads that miss the cache; it adds complexity.
✓
Change the read consistency to eventually consistent.
Why this is correct
Eventually consistent reads use half the RCUs of strongly consistent reads, allowing more read operations without increasing capacity.
Related concept
Read the scenario before looking for a memorised answer.
✗
Increase the provisioned RCUs for the table.
Why it's wrong here
Increasing RCUs resolves throttling but incurs additional cost, whereas the application can tolerate eventually consistent reads.
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 startup's cloud architect reviews their monthly bill and notices costs are higher than expected for a long-running batch job. Switching from on-demand instances to Reserved Instances — or using Spot/Preemptible VMs — can reduce compute costs by up to 72 %. Questions like this test whether you understand the tradeoffs between commitment, flexibility, and cost across cloud pricing models.
What to study next
Got this wrong? Here's your next step.
Identify which DBS-C01 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.
Management and Operations — This question tests Management and Operations — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Change the read consistency to eventually consistent. — Option A is correct because using eventually consistent reads consumes only half the RCUs compared to strongly consistent reads, effectively doubling the read capacity. Option B is wrong because DynamoDB Accelerator (DAX) is an in-memory cache that can reduce read load but does not directly address the RCU consumption for reads that still hit the table. Option C is wrong because increasing RCUs would solve throttling but increase costs unnecessarily if eventually consistent reads suffice. Option D is wrong because decreasing RCUs would worsen throttling.
What should I do if I get this DBS-C01 question wrong?
Identify which DBS-C01 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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Question Discussion
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