- A
Configure an S3 event notification to directly invoke an AWS Lambda function that starts the MediaConvert job.
This is a simple, reliable, and scalable event-driven pattern.
- B
Configure an S3 event notification to publish to an Amazon SNS topic, which triggers an AWS Lambda function that starts the MediaConvert job.
Why wrong: SNS adds latency and potential for message loss; direct S3 to Lambda is simpler.
- C
Use Amazon EventBridge to detect S3 PUT events and route them to a Lambda function.
Why wrong: EventBridge is not the primary service for S3 event notifications; S3 event notifications are native.
- D
Configure an S3 event notification to send events to an Amazon SQS queue, and have a Lambda function poll the queue and start MediaConvert jobs.
Why wrong: SQS adds polling overhead and complexity.
Quick Answer
The answer is configuring an S3 event notification to directly invoke an AWS Lambda function that starts the MediaConvert job. This pattern is the most reliable and scalable because S3 event notifications guarantee at-least-once delivery for each object created, and Lambda can handle the burst of concurrent invocations needed for high-volume uploads without provisioning servers. On the AWS Certified Solutions Architect Professional SAP-C02 exam, this question tests your understanding of event-driven architectures and the principle of using the simplest, most direct integration path—avoiding unnecessary intermediate services like SQS or SNS when the trigger source (S3) can natively invoke the compute target (Lambda). A common trap is overcomplicating the solution with queuing or fan-out patterns that add latency and cost without benefit. Remember the memory tip: "Direct is best for S3 triggers—Lambda is the glue, not the queue."
SAP-C02 Design for New Solutions Practice Question
This SAP-C02 practice question tests your understanding of design for new solutions. 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 media company is building a video transcoding pipeline using AWS Elemental MediaConvert. The source videos are uploaded to an S3 bucket, and the transcoded outputs are stored in another S3 bucket. The company wants to trigger the transcoding job as soon as a new video is uploaded. The pipeline must handle high volumes of uploads and ensure that no upload is missed. Which solution is MOST reliable and scalable?
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
Configure an S3 event notification to directly invoke an AWS Lambda function that starts the MediaConvert job.
Using S3 Event Notifications with Lambda to invoke MediaConvert is a reliable, serverless pattern. Option B (SQS) adds unnecessary complexity. Option C (SNS to Lambda) is indirect. Option D (CloudWatch Events) is not designed for S3 upload triggers.
Key principle: NAT direction and interface roles matter as much as the IP address mapping. Inside/outside designation controls which traffic is translated.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
Configure an S3 event notification to directly invoke an AWS Lambda function that starts the MediaConvert job.
Why this is correct
This is a simple, reliable, and scalable event-driven pattern.
Related concept
Static NAT maps one inside address to one outside address.
- ✗
Configure an S3 event notification to publish to an Amazon SNS topic, which triggers an AWS Lambda function that starts the MediaConvert job.
Why it's wrong here
SNS adds latency and potential for message loss; direct S3 to Lambda is simpler.
- ✗
Use Amazon EventBridge to detect S3 PUT events and route them to a Lambda function.
Why it's wrong here
EventBridge is not the primary service for S3 event notifications; S3 event notifications are native.
- ✗
Configure an S3 event notification to send events to an Amazon SQS queue, and have a Lambda function poll the queue and start MediaConvert jobs.
Why it's wrong here
SQS adds polling overhead and complexity.
Common exam traps
Common exam trap: NAT rules depend on direction and matching traffic
NAT is not only about the public address. The inside/outside interface roles and the ACL or rule that matches traffic are just as important.
Detailed technical explanation
How to think about this question
NAT questions usually test address translation, overload/PAT behaviour, static mappings and whether the right traffic is being translated. Read the interface direction and address terms carefully.
KKey Concepts to Remember
- Static NAT maps one inside address to one outside address.
- PAT allows many inside hosts to share one public address using ports.
- Inside local and inside global describe the private and translated addresses.
- NAT ACLs identify traffic for translation, not always security filtering.
TExam Day Tips
- Identify inside and outside interfaces first.
- Check whether the scenario needs static NAT, dynamic NAT or PAT.
- Do not confuse NAT matching ACLs with normal packet-filtering intent.
Key takeaway
NAT direction and interface roles matter as much as the IP address mapping. Inside/outside designation controls which traffic is translated.
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.
Review the four NAT address types (inside local, inside global, outside local, outside global), PAT port overload, and static vs dynamic NAT use cases. Then practise related SAP-C02 NAT questions on configuration and troubleshooting.
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Design for New Solutions — study guide chapter
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FAQ
Questions learners often ask
What does this SAP-C02 question test?
Design for New Solutions — This question tests Design for New Solutions — Static NAT maps one inside address to one outside address..
What is the correct answer to this question?
The correct answer is: Configure an S3 event notification to directly invoke an AWS Lambda function that starts the MediaConvert job. — Using S3 Event Notifications with Lambda to invoke MediaConvert is a reliable, serverless pattern. Option B (SQS) adds unnecessary complexity. Option C (SNS to Lambda) is indirect. Option D (CloudWatch Events) is not designed for S3 upload triggers.
What should I do if I get this SAP-C02 question wrong?
Review the four NAT address types (inside local, inside global, outside local, outside global), PAT port overload, and static vs dynamic NAT use cases. Then practise related SAP-C02 NAT questions on configuration and troubleshooting.
What is the key concept behind this question?
Static NAT maps one inside address to one outside address.
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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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