DBS-C01 Management and Operations Practice Question
A company is running an Amazon Redshift cluster with a single node. They need to improve query performance for large analytical workloads. Which action would provide the most immediate performance improvement?
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
✓
Increase the number of nodes in the cluster.
Adding more nodes to the cluster distributes the workload and improves parallelism. Option A is wrong because using a single node, distributing data across slices is limited. Option B is wrong because compression is already used typically. Option D is wrong because VACUUM reclaims space but does not significantly improve performance for large workloads.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Distribute the data across all slices.
Why it's wrong here
Single node has limited slices; distribution helps but not as much as adding nodes.
- ✗
Apply compression encodings to all columns.
Why it's wrong here
Compression reduces storage but not query performance dramatically.
- ✓
Increase the number of nodes in the cluster.
Why this is correct
Adding nodes increases processing power and memory.
- ✗
Run the VACUUM command to reclaim space.
Why it's wrong here
VACUUM improves space utilization, not query performance directly.
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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.