Quick Answer
The answer is Amazon Kinesis Data Firehose because it is purpose-built to buffer real-time clickstream data for up to 15 minutes and reliably deliver it to S3 without requiring any server management or manual scaling. This service directly handles the variable data volume from 100 to 100,000 events per second by automatically scaling its ingestion throughput, while its built-in buffering window satisfies the 5-minute requirement before writing to the S3 bucket. On the AWS Certified Solutions Architect Professional SAP-C02 exam, this scenario tests your ability to distinguish between streaming ingestion services: Kinesis Data Streams is a common distractor because it also handles clickstream data, but it requires you to manage shards and consumers, increasing operational overhead. The key trap is assuming you need a separate buffer like Lambda or SQS, but Firehose already includes native buffering with no concurrency limits or polling complexity. Memory tip: Firehose is the "fire-and-forget" delivery truck—it buffers, batches, and dumps to S3 automatically, while Data Streams is the "pay-per-shard" firehose you have to steer yourself.
This SAP-C02 practice question tests your understanding of design for new solutions. 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 company is designing a new solution to ingest real-time clickstream data from a website. The data volume varies from 100 to 100,000 events per second. The solution must buffer the data for up to 5 minutes and then deliver it to Amazon S3 for analysis. The company wants to minimize operational overhead and cost. Which service should be used to buffer the data?
Clue words in this question
Noticing these words before you look at the options changes how you read each choice.
Clue: "minimum / minimize"
Why it matters: Asks for the least resource use — fewest addresses, smallest subnet, lowest overhead. Eliminate over-provisioned options even if they would technically work.
Amazon Kinesis Data Streams
Why wrong: Requires managing shards and consumers.
AWS Lambda
Why wrong: Lambda is not a buffer service.
Amazon Kinesis Data Firehose
Firehose provides serverless buffering and delivery to S3.
Amazon SQS
Why wrong: SQS is not optimized for high-throughput streaming.
Answer choices
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
Amazon Kinesis Data Firehose
Option D is correct. Amazon Kinesis Data Firehose can buffer incoming data for up to 15 minutes and then deliver it to S3, with no server management. Option A is wrong because Kinesis Data Streams requires managing shards and consumers. Option B is wrong because SQS is not designed for large-scale streaming. Option C is wrong because Lambda has concurrency limits and is not a buffer.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Answer analysis
For each option: why learners choose it and why it is or isn't the right answer here.
Amazon Kinesis Data Streams
Why it's wrong here
Requires managing shards and consumers.
AWS Lambda
Why it's wrong here
Lambda is not a buffer service.
Amazon Kinesis Data Firehose
Why this is correct
Firehose provides serverless buffering and delivery to S3.
Clue confirmation
The clue word "minimum / minimize" in the question point toward this answer.
Related concept
Read the scenario before looking for a memorised answer.
Amazon SQS
Why it's wrong here
SQS is not optimized for high-throughput streaming.
Common exam traps
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
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.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
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
Identify which SAP-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.
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FAQ
Design for New Solutions — This question tests Design for New Solutions — Read the scenario before looking for a memorised answer..
The correct answer is: Amazon Kinesis Data Firehose — Option D is correct. Amazon Kinesis Data Firehose can buffer incoming data for up to 15 minutes and then deliver it to S3, with no server management. Option A is wrong because Kinesis Data Streams requires managing shards and consumers. Option B is wrong because SQS is not designed for large-scale streaming. Option C is wrong because Lambda has concurrency limits and is not a buffer.
Identify which SAP-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.
Yes — watch for: "minimum / minimize". Asks for the least resource use — fewest addresses, smallest subnet, lowest overhead. Eliminate over-provisioned options even if they would technically work.
Read the scenario before looking for a memorised answer.
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Last reviewed: Jun 20, 2026
This SAP-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 SAP-C02 exam.
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