The correct action is to call the IncreaseStreamRetentionPeriod API and set the retention period to 168 hours. This is because Kinesis Data Streams uses a dedicated API to modify retention, and 168 hours equals exactly 7 days, which is the maximum replay window needed. On the AWS Certified Data Engineer Associate DEA-C01 exam, this question tests your understanding of stream lifecycle management versus consumer-side or shard-level operations. A common trap is confusing retention changes with scaling actions like updating shard count or restarting consumers—neither of which affects how long data persists in the stream. Remember that retention is always adjusted via the IncreaseStreamRetentionPeriod or DecreaseStreamRetentionPeriod APIs, and the maximum is 365 days. A quick memory tip: think “Retention = Time, not Shards”—if the question mentions replay or data persistence, look for the API with “RetentionPeriod” in its name.
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.
Network Topology
A data engineer runs the describe-stream command and sees the output above. The stream has a retention period of 24 hours. The engineer needs to ensure that consumers can replay data for up to 7 days. Which action is required?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Use the IncreaseStreamRetentionPeriod API to set retention to 168 hours.
Option C is correct because to increase retention, you call IncreaseStreamRetentionPeriod. Option A is wrong because changing shard count does not affect retention. Option B is wrong because starting new consumers does not change retention. Option D is wrong because you can only increase retention up to 365 days.
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 number of shards to allow more data storage.
Why it's wrong here
Shards affect throughput, not retention duration.
✗
Delete the stream and recreate it with a longer retention period.
Why it's wrong here
Retention can be changed without deleting the stream.
✓
Use the IncreaseStreamRetentionPeriod API to set retention to 168 hours.
Why this is correct
The API can increase retention up to 365 days.
Related concept
Read the scenario before looking for a memorised answer.
✗
Create new consumer applications that read from the stream.
Why it's wrong here
Consumers do not change retention settings.
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.
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: Use the IncreaseStreamRetentionPeriod API to set retention to 168 hours. — Option C is correct because to increase retention, you call IncreaseStreamRetentionPeriod. Option A is wrong because changing shard count does not affect retention. Option B is wrong because starting new consumers does not change retention. Option D is wrong because you can only increase retention up to 365 days.
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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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.
Question Discussion
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