DVA-C02 Development with AWS Services Practice Question
This DVA-C02 practice question tests your understanding of development with aws services. This is a configuration task: choose the command set that satisfies every stated requirement. Small differences — like 'secret' vs 'password' or 'transport input ssh' vs 'all' — change whether the answer is correct. 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 developer is writing a Lambda function that processes events from an Amazon Kinesis stream. The function must ensure that records are processed in the order they were received and that each shard is processed by only one instance of the function at a time. How should the developer configure the Lambda function?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Set the batch size to 1 and configure the function's reserved concurrency to 1.
Option B is correct because setting the batch size to 1 and the concurrency to the number of shards (or reserved concurrency of 1) ensures per-shard ordering and single-threaded processing per shard. Option A is wrong because parallelization factor processes batches in parallel, breaking ordering. Option C is wrong because Lambda processes multiple shards concurrently by default, but reserving concurrency per shard is not possible; instead, set concurrency to 1. Option D is wrong because Kinesis ordering is per-shard, not across the stream.
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.
✗
Set the function's concurrency to the number of shards and enable parallelization factor.
Why it's wrong here
This would allow multiple instances per shard, breaking ordering.
✓
Set the batch size to 1 and configure the function's reserved concurrency to 1.
Why this is correct
Batch size 1 ensures records are processed one at a time, and reserved concurrency 1 ensures only one instance processes all shards sequentially.
Related concept
Read the scenario before looking for a memorised answer.
✗
Set the batch size to 100 and enable parallelization factor per shard.
Why it's wrong here
Parallelization factor allows concurrent processing of batches from the same shard, breaking ordering.
✗
Use a DynamoDB table to track sequence numbers and enforce ordering.
Why it's wrong here
This adds complexity and is not a built-in feature; Kinesis ensures ordering per shard.
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 startup's cloud architect reviews their monthly bill and notices costs are higher than expected for a long-running batch job. Switching from on-demand instances to Reserved Instances — or using Spot/Preemptible VMs — can reduce compute costs by up to 72 %. Questions like this test whether you understand the tradeoffs between commitment, flexibility, and cost across cloud pricing models.
What to study next
Got this wrong? Here's your next step.
Identify which DVA-C02 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.
Development with AWS Services — This question tests Development with AWS Services — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Set the batch size to 1 and configure the function's reserved concurrency to 1. — Option B is correct because setting the batch size to 1 and the concurrency to the number of shards (or reserved concurrency of 1) ensures per-shard ordering and single-threaded processing per shard. Option A is wrong because parallelization factor processes batches in parallel, breaking ordering. Option C is wrong because Lambda processes multiple shards concurrently by default, but reserving concurrency per shard is not possible; instead, set concurrency to 1. Option D is wrong because Kinesis ordering is per-shard, not across the stream.
What should I do if I get this DVA-C02 question wrong?
Identify which DVA-C02 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 DVA-C02 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 DVA-C02 exam.
Question Discussion
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