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 wants to store application logs in a centralized location for analysis. The logs are generated by EC2 instances in an Auto Scaling group. The solution must be cost-effective and support real-time analysis. Which service should be used to collect and analyze the logs?
Amazon S3
Why wrong: S3 is not designed for real-time log analysis.
Amazon Kinesis Data Firehose
Why wrong: Firehose is for streaming data to destinations, but CloudWatch is simpler for logs.
Amazon Elasticsearch Service
Why wrong: Elasticsearch is for search and analytics, not real-time log collection.
Amazon CloudWatch Logs
CloudWatch Logs provides real-time log collection and analysis.
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 CloudWatch Logs
Amazon CloudWatch Logs is the correct choice because it natively integrates with EC2 instances via the CloudWatch Logs agent to collect, monitor, and analyze log data in real time. It provides a centralized log storage with built-in metric filters and subscription filters for real-time analysis, making it cost-effective for logs generated by Auto Scaling groups without requiring additional infrastructure.
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 S3
Why it's wrong here
S3 is not designed for real-time log analysis.
Amazon Kinesis Data Firehose
Why it's wrong here
Firehose is for streaming data to destinations, but CloudWatch is simpler for logs.
Amazon Elasticsearch Service
Why it's wrong here
Elasticsearch is for search and analytics, not real-time log collection.
Amazon CloudWatch Logs
Why this is correct
CloudWatch Logs provides real-time log collection and analysis.
Related concept
Read the scenario before looking for a memorised answer.
Common exam traps
The trap here is that candidates often confuse 'real-time analysis' with needing a dedicated analytics service like Amazon Elasticsearch Service, overlooking that CloudWatch Logs provides built-in real-time monitoring and filtering capabilities without additional cost or complexity.
Detailed technical explanation
CloudWatch Logs uses a unified CloudWatch agent that can be installed on EC2 instances to send logs to log groups, where log streams are automatically created per instance. It supports real-time analysis through metric filters (which convert log patterns into CloudWatch metrics) and subscription filters (which stream logs to other services like Lambda or Kinesis for further processing). For Auto Scaling groups, the agent configuration can be baked into an AMI or deployed via user data, ensuring logs are collected even as instances scale in and out.
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
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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 CloudWatch Logs — Amazon CloudWatch Logs is the correct choice because it natively integrates with EC2 instances via the CloudWatch Logs agent to collect, monitor, and analyze log data in real time. It provides a centralized log storage with built-in metric filters and subscription filters for real-time analysis, making it cost-effective for logs generated by Auto Scaling groups without requiring additional infrastructure.
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
Read the scenario before looking for a memorised answer.
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Last reviewed: Jun 24, 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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