- A
AWS Lambda
Lambda can be triggered by S3 events to process data.
- B
Amazon Kinesis Data Streams
Why wrong: Kinesis is for real-time streaming, not S3 event processing.
- C
Amazon EC2
Why wrong: EC2 is not serverless.
- D
AWS Step Functions
Step Functions can orchestrate Lambda functions for workflow.
- E
Amazon EMR
Why wrong: EMR is for big data processing, not serverless event-driven.
Question 1,152 of 1,616
Serverless Event-Driven Architecture
This DVA-C02 practice question tests your understanding of development with aws services. 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.
Which TWO AWS services can be used to build a serverless event-driven application that processes data from Amazon S3 and stores results in Amazon DynamoDB? (Choose 2.)
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
✓
AWS Lambda
AWS Lambda is correct because it can be triggered directly by S3 events (e.g., ObjectCreated) to process data as soon as it arrives, and it can write the processed results to DynamoDB via the AWS SDK. This creates a fully serverless, event-driven pipeline without provisioning any servers.
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.
- ✓
AWS Lambda
Why this is correct
Lambda can be triggered by S3 events to process data.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
Amazon Kinesis Data Streams
Why it's wrong here
Kinesis is for real-time streaming, not S3 event processing.
- ✗
Amazon EC2
Why it's wrong here
EC2 is not serverless.
- ✓
AWS Step Functions
Why this is correct
Step Functions can orchestrate Lambda functions for workflow.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
Amazon EMR
Why it's wrong here
EMR is for big data processing, not serverless event-driven.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates often confuse Amazon Kinesis Data Streams as a direct S3 event target, but Kinesis cannot be triggered directly by S3 events and requires an intermediary like Lambda, making it an incorrect choice for a simple serverless event-driven application.
Detailed technical explanation
How to think about this question
Under the hood, S3 can send event notifications to Lambda via the S3 bucket notification configuration, which invokes the Lambda function synchronously with the event payload. The Lambda function then uses the DynamoDB PutItem or TransactWriteItems API to store results; this pattern is commonly used for real-time image processing, log parsing, or data enrichment pipelines where low latency and zero infrastructure management are critical.
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 DVA-C02 question test?
Development with AWS Services — This question tests Development with AWS Services — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: AWS Lambda — AWS Lambda is correct because it can be triggered directly by S3 events (e.g., ObjectCreated) to process data as soon as it arrives, and it can write the processed results to DynamoDB via the AWS SDK. This creates a fully serverless, event-driven pipeline without provisioning any servers.
What should I do if I get this DVA-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
This DVA-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 DVA-C02 exam.
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