DBS-C01 Monitoring and Troubleshooting Practice Question
A data analytics company runs Amazon Redshift clusters. A user reports that a complex query is taking much longer than expected. The DBA uses the STL_QUERY view to check the query execution. Which column in STL_QUERY should the DBA examine to identify if the query is waiting for resources?
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
✓
service_class
The 'service_class' column indicates the workload management (WLM) queue assigned to the query, which can help identify if the query was queued or waiting for resources. Option A is wrong because 'aborted' indicates whether the query was aborted, not waiting. Option B is wrong because 'query' is just the query ID. Option C is wrong because 'starttime' shows when the query started, not waiting status.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
aborted
Why it's wrong here
Aborted indicates if the query was terminated, not waiting.
- ✗
query
Why it's wrong here
The query ID does not indicate waiting.
- ✗
starttime
Why it's wrong here
Start time shows when the query began execution, not waiting.
- ✓
service_class
Why this is correct
Service class indicates the WLM queue; a high queue time suggests waiting for resources.
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JA
Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
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.