The correct answer is to increase the Firehose buffer size and buffer interval, which reduces the frequency of S3 PUT requests and directly resolves the S3 ThrottlingException in Kinesis Firehose. When Kinesis Data Firehose sends data to S3, it issues PUT requests based on the configured buffer size (default 5 MB) and buffer interval (default 60 seconds); if these are too small, the high request rate can exceed S3’s bucket-level request rate limits, causing throttling. On the AWS Certified Data Engineer Associate DEA-C01 exam, this question tests your understanding of Firehose’s buffering mechanics and error handling—a common trap is to assume you need to change the destination or enable S3 Transfer Acceleration, but those don’t address the root cause of excessive PUT requests. Remember that Firehose automatically retries failed deliveries, so increasing the buffer size or interval reduces the request rate without data loss. Memory tip: “Bigger buffer, fewer PUTs—throttling gets the boot.”
DEA-C01 Data Ingestion and Transformation Practice Question
This DEA-C01 practice question tests your understanding of data ingestion and transformation. 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 Kinesis Data Firehose to deliver streaming data to an Amazon S3 bucket. The delivery occasionally fails due to 'ThrottlingException' from S3. What should the team do to resolve this issue without losing data?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Increase the Firehose buffer size and buffer interval to reduce the number of S3 PUT requests.
Option C is correct. Kinesis Firehose can buffer failed records and retry; you can also increase the buffer size or interval to reduce S3 PUT frequency. Option A is wrong because disabling error logging is not a solution. Option B is wrong because S3 Transfer Acceleration is for speed, not throttling. Option D is wrong because DynamoDB is not the target.
Key principle: NAT direction and interface roles matter as much as the IP address mapping. Inside/outside designation controls which traffic is translated.
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 S3 Transfer Acceleration on the destination bucket.
Why it's wrong here
Transfer Acceleration does not help with throttling; it uses edge locations.
✗
Disable error logging in Firehose to reduce API calls.
Why it's wrong here
Disabling logging does not prevent throttling and may hide issues.
✗
Configure Firehose to deliver data to Amazon DynamoDB instead.
Why it's wrong here
Firehose cannot deliver to DynamoDB natively; the requirement is S3.
✓
Increase the Firehose buffer size and buffer interval to reduce the number of S3 PUT requests.
Why this is correct
Larger buffers mean fewer writes, reducing throttling risk.
Related concept
Static NAT maps one inside address to one outside address.
Common exam traps
Common exam trap: NAT rules depend on direction and matching traffic
NAT is not only about the public address. The inside/outside interface roles and the ACL or rule that matches traffic are just as important.
Detailed technical explanation
How to think about this question
NAT questions usually test address translation, overload/PAT behaviour, static mappings and whether the right traffic is being translated. Read the interface direction and address terms carefully.
KKey Concepts to Remember
Static NAT maps one inside address to one outside address.
PAT allows many inside hosts to share one public address using ports.
Inside local and inside global describe the private and translated addresses.
NAT ACLs identify traffic for translation, not always security filtering.
TExam Day Tips
→Identify inside and outside interfaces first.
→Check whether the scenario needs static NAT, dynamic NAT or PAT.
→Do not confuse NAT matching ACLs with normal packet-filtering intent.
Key takeaway
NAT direction and interface roles matter as much as the IP address mapping. Inside/outside designation controls which traffic is translated.
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.
Review the four NAT address types (inside local, inside global, outside local, outside global), PAT port overload, and static vs dynamic NAT use cases. Then practise related DEA-C01 NAT questions on configuration and troubleshooting.
Data Ingestion and Transformation — This question tests Data Ingestion and Transformation — Static NAT maps one inside address to one outside address..
What is the correct answer to this question?
The correct answer is: Increase the Firehose buffer size and buffer interval to reduce the number of S3 PUT requests. — Option C is correct. Kinesis Firehose can buffer failed records and retry; you can also increase the buffer size or interval to reduce S3 PUT frequency. Option A is wrong because disabling error logging is not a solution. Option B is wrong because S3 Transfer Acceleration is for speed, not throttling. Option D is wrong because DynamoDB is not the target.
What should I do if I get this DEA-C01 question wrong?
Review the four NAT address types (inside local, inside global, outside local, outside global), PAT port overload, and static vs dynamic NAT use cases. Then practise related DEA-C01 NAT questions on configuration and troubleshooting.
What is the key concept behind this question?
Static NAT maps one inside address to one outside address.
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Question Discussion
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