The answer is to use Amazon Athena with Lambda User-Defined Functions (UDFs) to redact sensitive data during query execution. This approach is the most scalable because it applies redaction logic on the fly at query time, directly within the Athena engine, without requiring any data movement or pre-processing. By invoking a Lambda UDF for each row or batch of rows, you can dynamically mask IP addresses in VPC Flow Logs stored in S3, ensuring the underlying data remains untouched while analysts only see redacted results. On the AWS Certified Solutions Architect Professional SAP-C02 exam, this scenario tests your understanding of serverless, query-time data masking versus object-level or pipeline-based transformations—a common trap is choosing S3 Object Lambda, which transforms entire objects before retrieval, not during a SQL query. Remember the memory tip: “Query-time redaction, not object mutation.”
SAP-C02 Practice Question: Design Solutions for Organizational Complexity
This SAP-C02 practice question tests your understanding of design solutions for organizational complexity. Match the stated requirement to the specific cloud service, access model, or configuration option — many options are valid in isolation but not for this scenario. 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 centralized logging solution where all VPC Flow Logs from member accounts are delivered to a central S3 bucket in the logging account. The logs contain sensitive IP addresses that must be redacted before analysis. What is the MOST scalable approach?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Use Amazon Athena with Lambda User-Defined Functions (UDFs) to redact data during query execution.
Option B is correct because Athena queries can use Lambda UDFs to redact data on the fly. Option A is wrong because S3 Object Lambda is for object-level transformations, not query-time. Option C is wrong because it's not scalable to run a script on each account. Option D is wrong because Kinesis adds complexity and is not necessary.
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.
✗
Create a Lambda function in each member account to redact logs before delivery.
Why it's wrong here
Not scalable; requires managing functions in many accounts.
✗
Use S3 Object Lambda to redact sensitive data when objects are read.
Why it's wrong here
S3 Object Lambda transforms objects at read time, but it's per-object, not per-query, and may not be efficient for large datasets.
✓
Use Amazon Athena with Lambda User-Defined Functions (UDFs) to redact data during query execution.
Why this is correct
Scalable and flexible; allows redaction on the fly without modifying stored data.
Related concept
Read the scenario before looking for a memorised answer.
✗
Use Amazon Kinesis Data Firehose to transform data before writing to S3.
Why it's wrong here
Adds streaming complexity and cost; may not be necessary for batch analysis.
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 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 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.
Design Solutions for Organizational Complexity — This question tests Design Solutions for Organizational Complexity — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Use Amazon Athena with Lambda User-Defined Functions (UDFs) to redact data during query execution. — Option B is correct because Athena queries can use Lambda UDFs to redact data on the fly. Option A is wrong because S3 Object Lambda is for object-level transformations, not query-time. Option C is wrong because it's not scalable to run a script on each account. Option D is wrong because Kinesis adds complexity and is not necessary.
What should I do if I get this SAP-C02 question wrong?
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.
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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