Question 1,156 of 1,663
DBS-C01 Monitoring and Troubleshooting Practice Question
A company is using Amazon Redshift and has a query that is running slowly. The DBA wants to identify if the query is I/O-bound. Which TWO metrics from Amazon CloudWatch can indicate I/O-bound queries?
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
ReadIOPS
Options B and E are correct. ReadIOPS measures the number of read I/O operations per second, and ReadLatency measures the average time per read I/O operation. High values for these metrics indicate that the query is I/O-bound. Option A (NetworkReceiveThroughput) measures network throughput, not I/O. Option C (CPUUtilization) indicates CPU-bound workloads. Option D (WriteIOPS) measures write I/O, which is less likely to be the primary indicator for a slow query, and the question asks for the two metrics that can indicate I/O-bound queries; ReadIOPS and ReadLatency are the most direct I/O metrics.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
NetworkReceiveThroughput
Why it's wrong here
Network throughput is not directly related to I/O-bound queries.
- ✓
ReadIOPS
Why this is correct
High ReadIOPS indicates many I/O operations.
- ✗
CPUUtilization
Why it's wrong here
CPUUtilization indicates CPU-bound, not I/O-bound.
- ✗
WriteIOPS
Why it's wrong here
WriteIOPS indicates write I/O, but the question is about read-heavy queries.
- ✓
ReadLatency
Why this is correct
High ReadLatency indicates I/O wait.
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Last reviewed: Jun 20, 2026
This DBS-C01 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 DBS-C01 exam.
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