DEA-C01 Data Operations and Support Practice Question
A company is using Amazon Kinesis Data Analytics (now part of Amazon Managed Service for Apache Flink) for streaming data processing. The application is experiencing high latency and the data engineer wants to improve performance. Which THREE actions should the engineer consider? (Choose three.)
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
✓
Use a larger Kinesis data stream with more shards.
Options A, C, and D are correct. Increasing the number of shards in the Kinesis stream (A) increases the ingestion capacity, which can reduce bottlenecks and lower latency. Increasing Flink parallelism (C and D) allows more parallel processing of data, improving throughput and reducing latency. Option B is incorrect because decreasing the buffer time in Flink can lead to increased network overhead and may not improve overall performance; it can actually increase latency due to more frequent data transfers. Option E is incorrect because decreasing the checkpoint interval increases the frequency of state snapshots, adding overhead and potentially increasing latency rather than reducing it.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
Use a larger Kinesis data stream with more shards.
Why this is correct
More shards provide higher throughput.
- ✗
Decrease the buffer time in the Flink application to reduce latency.
Why it's wrong here
Smaller buffer time increases micro-batching overhead, potentially increasing latency.
- ✓
Increase the Flink parallelism parameter in the application configuration.
Why this is correct
Higher parallelism improves throughput.
- ✓
Increase the Parallelism of the Flink application.
Why this is correct
More parallelism allows parallel processing.
- ✗
Decrease the checkpoint interval to reduce state size.
Why it's wrong here
Decreasing checkpoint interval increases overhead and latency.
Go deeper
Related to this question
About these practice questions
This DEA-C01 question is part of Courseiva's 1,711-question bank — original exam-style content with full explanations and wrong-answer analysis, never real exam questions or exam dumps. Learn why practice questions differ from exam dumps →
JA
Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
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.