- A
Snappy: Designed for high speed and efficient compression, ideal for real-time data processing.
Snappy prioritizes speed over compression ratio, making it suitable for real-time processing.
- B
Gzip: Provides the highest compression ratio, best for archival storage.
Why wrong: Incorrect — Bzip2 offers the highest compression ratio, not Gzip. Gzip provides moderate compression.
- C
LZO: Offers fast compression and decompression, widely used in Hadoop for intermediate data.
LZO is optimized for speed and often used in Hadoop for intermediate map-reduce data.
- D
Bzip2: Commonly used for log files due to good compression ratio.
Why wrong: Incorrect — Gzip is commonly used for log files. Bzip2 is slower and used for archival where higher compression is needed.
- E
Zstandard: Balances compression ratio and speed, suitable for a variety of workloads.
Zstandard provides a good trade-off between compression ratio and speed, making it versatile.
DEA-C01 Data Operations and Support Practice Question
This DEA-C01 practice question tests your understanding of data operations and support. Match the stated requirement to the specific cloud service, access model, or configuration option — many options are valid in isolation but not for this scenario. 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.
Match each AWS data compression format to its typical use case.
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
Snappy: Designed for high speed and efficient compression, ideal for real-time data processing.
In AWS data engineering, compression format choice depends on trade-offs between compression ratio and speed. Snappy and LZO are optimized for speed, Gzip and Bzip2 for higher compression (with Bzip2 highest), and Zstandard offers a middle ground. Common misassociations include confusing Gzip with Bzip2 for highest compression and missing Snappy's speed focus.
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.
- ✓
Snappy: Designed for high speed and efficient compression, ideal for real-time data processing.
Why this is correct
Snappy prioritizes speed over compression ratio, making it suitable for real-time processing.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
Gzip: Provides the highest compression ratio, best for archival storage.
Why it's wrong here
Incorrect — Bzip2 offers the highest compression ratio, not Gzip. Gzip provides moderate compression.
- ✓
LZO: Offers fast compression and decompression, widely used in Hadoop for intermediate data.
Why this is correct
LZO is optimized for speed and often used in Hadoop for intermediate map-reduce data.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
Bzip2: Commonly used for log files due to good compression ratio.
Why it's wrong here
Incorrect — Gzip is commonly used for log files. Bzip2 is slower and used for archival where higher compression is needed.
- ✓
Zstandard: Balances compression ratio and speed, suitable for a variety of workloads.
Why this is correct
Zstandard provides a good trade-off between compression ratio and speed, making it versatile.
Related concept
Read the scenario before looking for a memorised answer.
Common exam traps
Common exam trap: answer the scenario, not the keyword
Many certification questions include familiar terms but test a specific constraint. Read the exact wording before choosing an answer that is generally true but wrong for this case.
Detailed technical explanation
How to think about this question
This question should be treated as a scenario, not a definition check. Identify the problem, the constraint and the best action. Then compare each option against those facts.
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.
- Use explanations to understand the rule behind the answer.
TExam Day Tips
- Underline the problem statement mentally.
- 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 media company stores terabytes of video archives that are accessed once a year for audit purposes. Moving these objects to a cold storage tier (Azure Archive, S3 Glacier, or Google Nearline) costs a fraction of hot storage. Questions like this test whether you understand storage tiers, access frequency tradeoffs, and retrieval latency requirements.
What to study next
Got this wrong? Here's your next step.
Identify which DEA-C01 exam domain this question belongs to, then review the specific concept being tested. Practise related questions in that domain and focus on understanding why each wrong answer is tempting — not just why the correct answer is right.
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Data Operations and Support — study guide chapter
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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 — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Snappy: Designed for high speed and efficient compression, ideal for real-time data processing. — In AWS data engineering, compression format choice depends on trade-offs between compression ratio and speed. Snappy and LZO are optimized for speed, Gzip and Bzip2 for higher compression (with Bzip2 highest), and Zstandard offers a middle ground. Common misassociations include confusing Gzip with Bzip2 for highest compression and missing Snappy's speed focus.
What should I do if I get this DEA-C01 question wrong?
Identify which DEA-C01 exam domain this question belongs to, then review the specific concept being tested. Practise related questions in that domain and focus on understanding why each wrong answer is tempting — not just why the correct answer is right.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
About these practice questions
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Last reviewed: Jun 11, 2026
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.
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