The answer is Amazon CloudWatch Contributor Insights for DynamoDB. This tool is correct because it analyzes DynamoDB request logs to surface the top-N partition keys by request count or throttled events, directly revealing which specific partition keys are causing throttling during peak hours. On the AWS Certified Database Specialty DBS-C01 exam, this question tests your ability to differentiate between monitoring tools: CloudWatch metrics show aggregate throttling, but only Contributor Insights drills down to the partition key level. A common trap is choosing DynamoDB Accelerator (DAX) or CloudWatch Logs, but DAX caches reads without identifying hot keys, and raw logs require manual parsing. For the exam, remember that Contributor Insights is purpose-built for identifying hot partitions causing throttling, while standard CloudWatch metrics only tell you that throttling is happening, not where. Memory tip: “Contributor Insights = Key-Level Detective.”
DBS-C01 Monitoring and Troubleshooting Practice Question
This DBS-C01 practice question tests your understanding of monitoring and troubleshooting. 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 is running a production Amazon DynamoDB table with on-demand capacity. The application is experiencing increased latency and throttled requests during peak hours. Which monitoring tool should the database specialist use to identify the specific partition keys causing the throttling?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Amazon CloudWatch Contributor Insights for DynamoDB
Amazon CloudWatch Contributor Insights for DynamoDB is the correct tool because it analyzes DynamoDB request logs to identify the most frequently accessed partition keys, including those causing throttling. It provides top-N keys by request count or throttled events, enabling the database specialist to pinpoint hot partitions responsible for increased latency and throttled requests during peak hours.
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.
✓
Amazon CloudWatch Contributor Insights for DynamoDB
Why this is correct
Contributor Insights analyzes access patterns and identifies throttled partition keys.
Related concept
Read the scenario before looking for a memorised answer.
✗
Amazon Inspector
Why it's wrong here
Amazon Inspector is a vulnerability management service, not for DynamoDB monitoring.
✗
AWS Config
Why it's wrong here
AWS Config tracks configuration changes, not performance metrics.
✗
AWS CloudTrail logs
Why it's wrong here
CloudTrail records API calls but does not provide partition-level throttling analysis.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates often confuse CloudTrail (which logs all API calls) with Contributor Insights, assuming CloudTrail can provide per-key throttling data, but CloudTrail lacks the aggregation and top-N analysis needed to identify specific hot partition keys.
Detailed technical explanation
How to think about this question
CloudWatch Contributor Insights uses a high-cardinality analytics engine that ingests DynamoDB request logs (via CloudWatch Logs) and computes top contributors based on specified dimensions like PartitionKey. Under the hood, it applies a space-saving algorithm to approximate the most frequent keys without storing all data, making it efficient for real-time monitoring. In a real-world scenario, a sudden spike in throttling on a DynamoDB table with on-demand capacity often stems from a single hot key (e.g., a popular user ID or product), and Contributor Insights can surface that key within minutes, allowing the specialist to implement strategies like write sharding or DAX caching.
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 company's IT admin needs to give a contractor read-only access to production logs without sharing account credentials. Using role-based access control (RBAC) and temporary scoped permissions — not a permanent shared password — is the correct pattern. Questions like this test whether you can apply least-privilege access across cloud identity services.
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.
Monitoring and Troubleshooting — This question tests Monitoring and Troubleshooting — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Amazon CloudWatch Contributor Insights for DynamoDB — Amazon CloudWatch Contributor Insights for DynamoDB is the correct tool because it analyzes DynamoDB request logs to identify the most frequently accessed partition keys, including those causing throttling. It provides top-N keys by request count or throttled events, enabling the database specialist to pinpoint hot partitions responsible for increased latency and throttled requests during peak hours.
What should I do if I get this DBS-C01 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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