SAP-C02 Continuous Improvement for Existing Solutions Practice Question
This SAP-C02 practice question tests your understanding of continuous improvement for existing solutions. Examine the command output carefully: the correct answer depends on what the output actually shows, not on general recall alone. 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 as its primary database. The operations team is seeing increased read latency during peak hours. The table has a provisioned read capacity of 1000 RCU, but CloudWatch metrics show that consumed read capacity frequently reaches 1000 RCU. The application uses eventually consistent reads. What is the MOST cost-effective way to reduce read latency?
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
✓
Enable DynamoDB Accelerator (DAX) to cache frequently read items.
Option C is correct because enabling DynamoDB Accelerator (DAX) provides an in-memory cache that reduces read latency without increasing provisioned RCU. Option A is wrong because increasing RCU increases cost. Option B is wrong because switching to strongly consistent reads would double RCU consumption. Option D is wrong because adding a global secondary index does not reduce read latency for the base table. Option E is wrong because using ElastiCache adds complexity and cost.
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.
✗
Switch to strongly consistent reads to improve consistency.
Why it's wrong here
Strongly consistent reads consume double the RCU, worsening throttling.
✓
Enable DynamoDB Accelerator (DAX) to cache frequently read items.
Why this is correct
DAX provides microsecond read latency and reduces load on the table.
Clue confirmation
The clue word "primary" in the question point toward this answer.
Related concept
Read the scenario before looking for a memorised answer.
✗
Create a global secondary index (GSI) on the table to offload reads.
Why it's wrong here
GSI is for different access patterns, not for reducing base table read latency.
✗
Increase the provisioned read capacity to 2000 RCU.
Why it's wrong here
Increases cost without addressing latency directly.
✗
Use Amazon ElastiCache for Memcached as a read cache.
Why it's wrong here
ElastiCache is more complex and requires application changes; DAX is native to DynamoDB.
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 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.
Continuous Improvement for Existing Solutions — This question tests Continuous Improvement for Existing Solutions — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Enable DynamoDB Accelerator (DAX) to cache frequently read items. — Option C is correct because enabling DynamoDB Accelerator (DAX) provides an in-memory cache that reduces read latency without increasing provisioned RCU. Option A is wrong because increasing RCU increases cost. Option B is wrong because switching to strongly consistent reads would double RCU consumption. Option D is wrong because adding a global secondary index does not reduce read latency for the base table. Option E is wrong because using ElastiCache adds complexity and cost.
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.
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?
Read the scenario before looking for a memorised answer.
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Question Discussion
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