The answer is to install and configure the Amazon CloudWatch agent on the EC2 instance. This solution is correct because the CloudWatch agent can be deployed without any code changes—it directly tails the existing local log file and forwards the data to CloudWatch Logs for centralized management, preserving the legacy application’s integrity. On the AWS Certified Solutions Architect Professional SAP-C02 exam, this scenario tests your understanding of operational efficiency versus architectural overhauls; a common trap is suggesting a custom script or a sidecar container, which adds unnecessary complexity when a purpose-built agent exists. The key exam concept here is that the CloudWatch agent is designed specifically to centralize logs without modifying application code, making it the most operationally efficient path for legacy systems. Memory tip: think “agent, not change”—the agent adapts to the app, not the other way around.
SAP-C02 Continuous Improvement for Existing Solutions Practice Question
This SAP-C02 practice question tests your understanding of continuous improvement for existing 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 has a legacy application that runs on a single EC2 instance. The application writes logs to a local file. The company wants to centralize log management without modifying the application code. Which solution is MOST operationally efficient?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Install and configure the Amazon CloudWatch agent on the EC2 instance.
The Amazon CloudWatch agent can be installed on the EC2 instance without modifying application code. It reads the local log file and sends the logs to Amazon CloudWatch Logs for centralized management, making it the most operationally efficient solution.
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.
✗
Use AWS CloudTrail to capture log file changes.
Why it's wrong here
CloudTrail records API calls, not application logs.
✗
Modify the application to write logs to stdout and use the awslogs driver.
Why it's wrong here
Requires code modification, which may not be feasible.
✓
Install and configure the Amazon CloudWatch agent on the EC2 instance.
Why this is correct
CloudWatch agent can collect logs from local files without code changes.
Related concept
Read the scenario before looking for a memorised answer.
✗
Set up an Amazon S3 bucket and use an AWS Lambda function to periodically copy log files.
Why it's wrong here
Running a Lambda function to copy logs is less efficient and adds complexity.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates may think modifying the application to use stdout with the awslogs driver is simpler, but that requires code changes, which the question explicitly prohibits.
Detailed technical explanation
How to think about this question
The Amazon CloudWatch agent uses a configuration file to specify which log files to monitor, including multi-line log patterns and timestamp formats. It supports both Linux and Windows instances and can send logs to CloudWatch Logs in near real-time using the PutLogEvents API, with automatic log rotation handling and retention policies. This approach avoids the overhead of custom scripting or application rewrites.
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.
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
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 media company stores terabytes of video archives that are accessed once a year for audit purposes. Moving these objects to a cold storage tier (Azure Archive, S3 Glacier, or Google Nearline) costs a fraction of hot storage. Questions like this test whether you understand storage tiers, access frequency tradeoffs, and retrieval latency requirements.
What to study next
Got this wrong? Here's your next step.
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
Continuous Improvement for Existing Solutions — This question tests Continuous Improvement for Existing Solutions — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Install and configure the Amazon CloudWatch agent on the EC2 instance. — The Amazon CloudWatch agent can be installed on the EC2 instance without modifying application code. It reads the local log file and sends the logs to Amazon CloudWatch Logs for centralized management, making it the most operationally efficient solution.
What should I do if I get this SAP-C02 question wrong?
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
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Question Discussion
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