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DEA-C01 Data Store Management Practice Question

This DEA-C01 practice question tests your understanding of data store management. The scenario asks you to isolate a root cause — eliminate options that address a different problem before choosing. 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 uses Amazon Redshift for data warehousing. The data team notices that queries are slow due to high disk usage on the cluster. They need to free up space without deleting any data. What should they do?

A
Change the table's sort keys
Why wrong: Changing sort keys requires recreating tables and does not immediately free space.
B
Run a deep copy to re-sort and reclaim space
Deep copy reorganizes data and reclaims disk space effectively.
C
Run VACUUM command
Why wrong: VACUUM reclaims space from deleted rows but may not be sufficient.
D
Add more nodes to the cluster
Why wrong: This increases capacity but does not free space on existing nodes.

Full breakdown with real-world context →

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

✓

Run a deep copy to re-sort and reclaim space

Option B is correct because a deep copy recreates the table with optimal sort order and reclaims unused space by reorganizing data blocks. This process effectively frees up disk space without deleting any data, addressing the high disk usage issue.

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.

✗
Change the table's sort keys
Why it's wrong here
Changing sort keys requires recreating tables and does not immediately free space.
✓
Run a deep copy to re-sort and reclaim space
Why this is correct
Deep copy reorganizes data and reclaims disk space effectively.
Related concept
Read the scenario before looking for a memorised answer.
✗
Run VACUUM command
Why it's wrong here
VACUUM reclaims space from deleted rows but may not be sufficient.
✗
Add more nodes to the cluster
Why it's wrong here
This increases capacity but does not free space on existing nodes.

Common exam traps

Common exam trap: answer the scenario, not the keyword

The trap here is that candidates often confuse the VACUUM command with a deep copy, assuming VACUUM reclaims all unused space, but VACUUM only handles space from deleted rows and does not fully reorganize unsorted data to reduce high disk usage.

Detailed technical explanation

How to think about this question

A deep copy in Amazon Redshift involves creating a new table with the same schema and data, sorted according to the defined sort keys, then dropping the original table and renaming the new one. This process eliminates interleaved unsorted regions and reclaims space that was previously occupied by deleted or outdated rows, as Redshift does not automatically reorganize data after deletes. In real-world scenarios, deep copies are often scheduled during maintenance windows to optimize storage and query performance without data loss.

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 cloud solutions architect for a retail company is evaluating services for a new workload. The correct answer here reflects best practice for the specific scenario described — not a general cloud recommendation. Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option. Cloud exam questions reward reading the constraint carefully: the same technology can be right or wrong depending on the use case.

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.

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FAQ

Questions learners often ask

What does this DEA-C01 question test?

Data Store Management — This question tests Data Store Management — Read the scenario before looking for a memorised answer..

What is the correct answer to this question?

The correct answer is: Run a deep copy to re-sort and reclaim space — Option B is correct because a deep copy recreates the table with optimal sort order and reclaims unused space by reorganizing data blocks. This process effectively frees up disk space without deleting any data, addressing the high disk usage issue.

What should I do if I get this DEA-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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This DEA-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 DEA-C01 exam.