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SOA-C02 Practice Question: CloudWatch Logs Insights for querying structured…
This SOA-C02 practice question tests your understanding of cloudwatch logs insights for querying structured…. Read the scenario carefully and evaluate each option against the stated constraints before committing to an answer. A key principle to apply: cloudWatch Logs Insights. 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.
Multiple microservices each write structured JSON logs to separate CloudWatch log groups. The operations team needs to find all ERROR-level log entries across all log groups for the past 24 hours and count errors by service name. Which approach achieves this with the least operational overhead?
Answer choices
Why each option matters
Good practice is not just finding the correct option. The wrong answers often show the exact trap the exam wants you to fall into.
A
Distractor review
Use the AWS CLI to download and grep log events from each log group separately, then sum the results
CLI log downloads are slow for 24-hour windows across many groups and require scripting to aggregate counts. Logs Insights performs this server-side in seconds without downloading any data.
B
Best answer
Run a CloudWatch Logs Insights query selecting all relevant log groups, filter where level = 'ERROR', and use stats count(*) by service
Logs Insights accepts a comma-separated list of log group names (or a log group name prefix pattern) in the query scope. The filter and stats commands work across all selected groups in a single query execution. No additional pipeline or aggregation layer is needed.
C
Distractor review
Export each log group to S3 and run an Athena query joining all exported files
Exporting to S3 is an asynchronous operation (hours for large log groups) and requires setting up Glue tables or Athena schema definitions before querying. For an ad-hoc 24-hour investigation, this approach has far more setup overhead than Logs Insights.
D
Distractor review
Subscribe all log groups to a Kinesis Data Firehose stream and query the aggregated data in OpenSearch
A Kinesis + OpenSearch pipeline is a persistent, always-on log aggregation architecture appropriate for long-term search and dashboarding. For a one-off cross-service query, it requires provisioning and configuring significant infrastructure before any query can be run.
Common exam trap
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.
Technical deep dive
How to think about this question
Treat this as a scenario question. Identify the problem, the constraint, and the best action. Then compare each option against those facts.
KKey Concepts to Remember
- CloudWatch Logs Insights
- log query syntax
- cross-log-group query
- filter and stats
TExam Day Tips
- 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
CloudWatch Logs Insights
Related practice questions
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More questions from this exam
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Question 1
A company uses Amazon CloudFront to deliver content to a global audience. The origin is an Application Load Balancer in us-east-1. The SysOps administrator wants to reduce costs by minimizing the number of requests that reach the origin server. Which action should the administrator take?
Question 2
A company runs a batch processing application on Amazon EC2 that runs for 2 hours every night. The workload can tolerate interruptions. Which EC2 purchasing option provides the lowest cost for this use case?
Question 3
A SysOps administrator needs to monitor the CPU utilization of an Amazon RDS DB instance and receive an alarm when CPU utilization exceeds 80% for 5 consecutive minutes. Which AWS service should be used to create this alarm?
Question 4
A company runs a critical web application on Amazon EC2 instances in an Auto Scaling group behind an Application Load Balancer (ALB). The application uses session stickiness (sticky sessions) to maintain user sessions. The SysOps administrator notices that when instances are replaced during a scale-in or failure event, users lose their session data. The administrator needs to preserve session data across instance failures without losing stickiness benefits. What should the administrator do?
Question 5
A company runs a production web application on a single Amazon EC2 instance. The application experiences a predictable and steady workload 24/7. The SysOps administrator wants to minimize compute costs for this instance while ensuring it remains available during the expected workload. Which EC2 purchasing option should the administrator use?
Question 6
A company has a VPC with public and private subnets. The private subnets host application servers that need to make outbound HTTPS connections to the internet. The SysOps administrator must implement a solution that provides outbound internet connectivity while preventing inbound connections from the internet. Additionally, the solution must allow the company to control which domains the application servers can access. Which solution should the administrator implement?
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FAQ
Questions learners often ask
What does this SOA-C02 question test?
CloudWatch Logs Insights
What is the correct answer to this question?
The correct answer is: Run a CloudWatch Logs Insights query selecting all relevant log groups, filter where level = 'ERROR', and use stats count(*) by service — CloudWatch Logs Insights supports queries across multiple log groups simultaneously — up to 50 groups in a single query. The query syntax can filter on JSON fields (e.g., filter level = 'ERROR') and aggregate with stats count(*) by service. This requires no additional infrastructure, no log aggregation pipeline, and no third-party tool. Results are returned interactively in the console or programmatically via the StartQuery and GetQueryResults API.
What should I do if I get this SOA-C02 question wrong?
Review cloudWatch Logs Insights, then practise related SOA-C02 questions on the same topic to reinforce the concept.
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