- A
Enable concurrency scaling.
Why wrong: Concurrency scaling adds cluster capacity to handle many concurrent queries, improving performance but not high availability.
- B
Configure cross-region snapshot copy.
Cross-region snapshot copy provides disaster recovery by replicating snapshots to another region, ensuring data availability in case of a regional outage. This is a correct action for high availability.
- C
Enable automatic replication across Availability Zones.
Why wrong: Automatic replication across Availability Zones is not a feature of Amazon Redshift. Redshift clusters are deployed in a single AZ, so this option is incorrect.
- D
Use a single-node cluster to reduce complexity.
Why wrong: A single-node cluster has no redundancy; if the node fails, the cluster becomes unavailable. This does not support high availability.
- E
Deploy a multi-node cluster with at least two compute nodes.
A multi-node cluster with at least two compute nodes provides node-level redundancy, so failures can be tolerated. This is a correct action for high availability.
DEA-C01 High Availability Practice Question
This DEA-C01 practice question tests your understanding of data operations and support. The scenario asks you to isolate a root cause — eliminate options that address a different problem before choosing. A key principle to apply: high Availability. 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 data engineer is setting up a Redshift cluster and needs to ensure high availability. Which TWO actions should be taken?
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
Configure cross-region snapshot copy.
For high availability in Amazon Redshift, you need to protect against data loss and downtime. Option B (configure cross-region snapshot copy) ensures that snapshots are replicated to another region, providing disaster recovery and high availability in case of a regional outage. Option E (deploy a multi-node cluster with at least two compute nodes) provides node-level redundancy; if one node fails, the workload can be redistributed. Option C (enable automatic replication across Availability Zones) is not a feature of Amazon Redshift; Redshift does not support automatic cross-AZ replication for compute nodes. Option A (concurrency scaling) improves query concurrency, not availability. Option D (single-node cluster) offers no redundancy.
Key principle: High Availability
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Enable concurrency scaling.
Why it's wrong here
Concurrency scaling adds cluster capacity to handle many concurrent queries, improving performance but not high availability.
- ✓
Configure cross-region snapshot copy.
Why this is correct
Cross-region snapshot copy provides disaster recovery by replicating snapshots to another region, ensuring data availability in case of a regional outage. This is a correct action for high availability.
Related concept
High Availability
- ✗
Enable automatic replication across Availability Zones.
Why it's wrong here
Automatic replication across Availability Zones is not a feature of Amazon Redshift. Redshift clusters are deployed in a single AZ, so this option is incorrect.
- ✗
Use a single-node cluster to reduce complexity.
Why it's wrong here
A single-node cluster has no redundancy; if the node fails, the cluster becomes unavailable. This does not support high availability.
- ✓
Deploy a multi-node cluster with at least two compute nodes.
Why this is correct
A multi-node cluster with at least two compute nodes provides node-level redundancy, so failures can be tolerated. This is a correct action for high availability.
Related concept
High Availability
Common exam traps
Common exam trap: answer the scenario, not the keyword
Candidates often assume that cross-AZ replication is available for Redshift, but it is not. The correct HA measures are cross-region snapshot copy and multi-node clusters.
Detailed technical explanation
How to think about this question
Treat this as a scenario question. Identify the problem, the constraint, and the best action. Then compare each option against those facts.
KKey Concepts to Remember
- High Availability
- Cross-Region Snapshot Copy
- Multi-Node Cluster
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
High Availability
Real-world example
How this comes up in practice
An e-commerce site experiences heavy traffic on Black Friday and near-zero traffic during off-peak weeks. Rather than provisioning permanent large VMs, the team uses auto-scaling groups that add capacity automatically under load and reduce it overnight. Questions like this test whether you understand elasticity, availability zones, and cloud compute scaling patterns.
What to study next
Got this wrong? Here's your next step.
Review high Availability, then practise related DEA-C01 questions on the same topic to reinforce the concept.
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FAQ
Questions learners often ask
What does this DEA-C01 question test?
Data Operations and Support — This question tests Data Operations and Support — High Availability.
What is the correct answer to this question?
The correct answer is: Configure cross-region snapshot copy. — For high availability in Amazon Redshift, you need to protect against data loss and downtime. Option B (configure cross-region snapshot copy) ensures that snapshots are replicated to another region, providing disaster recovery and high availability in case of a regional outage. Option E (deploy a multi-node cluster with at least two compute nodes) provides node-level redundancy; if one node fails, the workload can be redistributed. Option C (enable automatic replication across Availability Zones) is not a feature of Amazon Redshift; Redshift does not support automatic cross-AZ replication for compute nodes. Option A (concurrency scaling) improves query concurrency, not availability. Option D (single-node cluster) offers no redundancy.
What should I do if I get this DEA-C01 question wrong?
Review high Availability, then practise related DEA-C01 questions on the same topic to reinforce the concept.
What is the key concept behind this question?
High Availability
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Last reviewed: Jun 20, 2026
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