The answer is to register an enhanced fan-out consumer for the slow consumer. This is correct because enhanced fan-out consumers each receive their own dedicated 2 MB per second read throughput per shard, allowing the lagging consumer to catch up independently without competing for the default shared 2 MB per second read throughput that all standard consumers must split. On the AWS Certified Data Engineer Associate DEA-C01 exam, this question tests your understanding of how enhanced fan-out provides isolated read capacity, a key differentiator from standard consumers that share the shard’s read quota. A common trap is to suggest increasing the number of shards, but that action increases write capacity and affects all consumers, while enhanced fan-out only impacts the specific consumer’s read path. Remember the mnemonic “EFO = Each Fan Out” to recall that each enhanced consumer gets its own exclusive throughput pipe.
DEA-C01 Data Ingestion and Transformation Practice Question
This DEA-C01 practice question tests your understanding of data ingestion and transformation. Read the scenario carefully and evaluate each option against the stated constraints before committing to an answer. 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 data pipeline uses Amazon Kinesis Data Streams with enhanced fan-out consumers. The team notices that one consumer falls behind and data accumulates. Which action will help this consumer catch up without affecting other consumers?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Register an enhanced fan-out consumer for the slow consumer.
Registering a new enhanced fan-out consumer with its own dedicated read throughput allows it to catch up independently. Increasing shards affects all consumers, and increasing iterator age may help but doesn't increase throughput.
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.
✗
Increase the retention period of the stream.
Why it's wrong here
Longer retention allows more time to process but doesn't speed up consumption.
✓
Register an enhanced fan-out consumer for the slow consumer.
Why this is correct
Enhanced fan-out provides dedicated throughput per consumer, allowing the slow consumer to catch up without impacting others.
Related concept
Read the scenario before looking for a memorised answer.
✗
Increase the number of shards in the stream.
Why it's wrong here
Adding shards increases overall throughput but affects all consumers, not just the slow one.
✗
Use a Lambda consumer instead of an enhanced fan-out consumer.
Why it's wrong here
Lambda consumers still share read throughput unless using enhanced fan-out.
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 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 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.
Data Ingestion and Transformation — This question tests Data Ingestion and Transformation — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Register an enhanced fan-out consumer for the slow consumer. — Registering a new enhanced fan-out consumer with its own dedicated read throughput allows it to catch up independently. Increasing shards affects all consumers, and increasing iterator age may help but doesn't increase throughput.
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.
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Question Discussion
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