- 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.
SAP-C02 Design for New Solutions Practice Question
This SAP-C02 practice question tests your understanding of design for new solutions. This is a configuration task: choose the command set that satisfies every stated requirement. Small differences — like 'secret' vs 'password' or 'transport input ssh' vs 'all' — change whether the answer is correct. 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.
Option A is correct because S3 event notifications can directly invoke a Lambda function with minimal latency and no intermediate components, making it the simplest and most reliable way to trigger MediaConvert jobs for each upload. S3 event notifications are designed to deliver events with at-least-once delivery semantics, ensuring no upload is missed even under high volumes. This direct integration avoids additional failure points like SNS or SQS, which could introduce delays or require extra configuration for scaling.
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.
- ✓
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
Read the scenario before looking for a memorised answer.
- ✗
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: answer the scenario, not the keyword
The trap here is that candidates may overcomplicate the solution by adding intermediate services like SNS or SQS, thinking they improve reliability, when in fact the direct S3-to-Lambda integration is the most reliable and scalable for this specific trigger pattern, and additional components only introduce unnecessary complexity and potential failure points.
Detailed technical explanation
How to think about this question
S3 event notifications use a push model where S3 sends events to the configured destination (Lambda, SQS, or SNS) with at-least-once delivery, meaning duplicates are possible but events are never lost. Lambda functions invoked by S3 events can scale up to 1,000 concurrent executions per region by default, which is sufficient for most high-volume video upload scenarios. MediaConvert jobs are asynchronous and can be queued by the service itself, so the Lambda function only needs to submit the job and can exit quickly, avoiding timeout issues.
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.
Quick reference
AWS S3 Storage Class Comparison
| Storage Class | Min Duration | Retrieval | Use Case |
|---|---|---|---|
| S3 Standard | None | Immediate | Frequently accessed data |
| S3 Standard-IA | 30 days | Immediate | Infrequent access, rapid retrieval |
| S3 One Zone-IA | 30 days | Immediate | Non-critical infrequent data |
| S3 Intelligent-Tiering | None | Immediate–hours | Unknown or changing access patterns |
| S3 Glacier Instant | 90 days | Milliseconds | Archive with instant retrieval |
| S3 Glacier Flexible | 90 days | Minutes–hours | Archive, flexible retrieval |
| S3 Glacier Deep Archive | 180 days | Hours | Long-term compliance archive |
What to study next
Got this wrong? Here's your next step.
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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 — Read the scenario before looking for a memorised answer..
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. — Option A is correct because S3 event notifications can directly invoke a Lambda function with minimal latency and no intermediate components, making it the simplest and most reliable way to trigger MediaConvert jobs for each upload. S3 event notifications are designed to deliver events with at-least-once delivery semantics, ensuring no upload is missed even under high volumes. This direct integration avoids additional failure points like SNS or SQS, which could introduce delays or require extra configuration for scaling.
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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Last reviewed: Jul 4, 2026
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