- A
Increase the parallelism of the Flink application.
Why wrong: Increasing parallelism is a tuning step, not a diagnostic action. It may help after identifying a bottleneck, but the first step should be to diagnose the cause of checkpoint failures.
- B
Monitor CPU and memory utilization of the Flink application using Amazon CloudWatch metrics.
Checkpoint failures are often due to insufficient resources (CPU/memory). Monitoring CPU and memory utilization via CloudWatch metrics directly helps identify resource bottlenecks.
- C
Switch to the Kinesis Client Library (KCL) for checkpointing.
Why wrong: The Kinesis Client Library (KCL) is used for processing Kinesis streams with the Kinesis Data Streams API, not for Apache Flink. KCL is not relevant to Flink checkpointing.
- D
Increase the checkpoint interval to reduce checkpoint frequency.
Why wrong: Increasing the checkpoint interval might reduce the frequency of failures but does not diagnose the root cause. The first step should be to check resource utilization.
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 Analytics for Apache Flink to process streaming data. The application reads from a Kinesis data stream, performs a 1-minute tumbling window aggregation, and writes results to an S3 bucket. Recently, the application started experiencing checkpoint failures and increasing processing delay. Which action should the engineer take FIRST to diagnose the issue?
Clue words in this question
Noticing these words before you look at the options changes how you read each choice.
Clue:
"first"Why it matters: Order matters here. You are being tested on which action comes before the others — not which action is generally useful.
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
Monitor CPU and memory utilization of the Flink application using Amazon CloudWatch metrics.
Option B is correct because checkpoint failures are often due to insufficient resources (CPU/memory) for the Flink job. Monitoring CPU and memory utilization via CloudWatch metrics directly helps identify resource bottlenecks. Option A (increasing parallelism) is a tuning step that might help but is not diagnostic. Option C (switching to KCL) is not relevant for Flink checkpointing. Option D (increasing checkpoint interval) might reduce checkpoint frequency but does not address the root cause of checkpoint failures. The first step is to check resource utilization.
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 parallelism of the Flink application.
Why it's wrong here
Increasing parallelism is a tuning step, not a diagnostic action. It may help after identifying a bottleneck, but the first step should be to diagnose the cause of checkpoint failures.
- ✓
Monitor CPU and memory utilization of the Flink application using Amazon CloudWatch metrics.
Why this is correct
Checkpoint failures are often due to insufficient resources (CPU/memory). Monitoring CPU and memory utilization via CloudWatch metrics directly helps identify resource bottlenecks.
Clue confirmation
The clue word "first" in the question point toward this answer.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
Switch to the Kinesis Client Library (KCL) for checkpointing.
Why it's wrong here
The Kinesis Client Library (KCL) is used for processing Kinesis streams with the Kinesis Data Streams API, not for Apache Flink. KCL is not relevant to Flink checkpointing.
- ✗
Increase the checkpoint interval to reduce checkpoint frequency.
Why it's wrong here
Increasing the checkpoint interval might reduce the frequency of failures but does not diagnose the root cause. The first step should be to check resource utilization.
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.
Quick reference
AWS S3 Storage Class Comparison
| Storage Class | Min Duration | Retrieval | Use Case |
|---|---|---|---|
| S3 Standard | None | Immediate | Frequently accessed data |
| S3 Standard-IA | 30 days | Immediate | Infrequent access, rapid retrieval |
| S3 One Zone-IA | 30 days | Immediate | Non-critical infrequent data |
| S3 Intelligent-Tiering | None | Immediate–hours | Unknown or changing access patterns |
| S3 Glacier Instant | 90 days | Milliseconds | Archive with instant retrieval |
| S3 Glacier Flexible | 90 days | Minutes–hours | Archive, flexible retrieval |
| S3 Glacier Deep Archive | 180 days | Hours | Long-term compliance archive |
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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FAQ
Questions learners often ask
What does this DEA-C01 question test?
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: Monitor CPU and memory utilization of the Flink application using Amazon CloudWatch metrics. — Option B is correct because checkpoint failures are often due to insufficient resources (CPU/memory) for the Flink job. Monitoring CPU and memory utilization via CloudWatch metrics directly helps identify resource bottlenecks. Option A (increasing parallelism) is a tuning step that might help but is not diagnostic. Option C (switching to KCL) is not relevant for Flink checkpointing. Option D (increasing checkpoint interval) might reduce checkpoint frequency but does not address the root cause of checkpoint failures. The first step is to check resource utilization.
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.
Are there clue words in this question I should notice?
Yes — watch for: "first". Order matters here. You are being tested on which action comes before the others — not which action is generally useful.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
About these practice questions
Courseiva creates original exam-style practice questions with explanations and wrong-answer analysis. It does not publish real exam questions, exam dumps, or protected exam content. Learn why practice questions differ from exam dumps →
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Last reviewed: Jun 20, 2026
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