Jeff’s Note #
Unlike generic exam dumps, ADH analyzes this scenario through the lens of a Real-World Lead Developer.
For AWS DVA-C02 candidates, the confusion often lies in how to properly share Lambda test event data across multiple developers without losing edit control or security boundaries. In production, this is about knowing exactly where Lambda test events live in the AWS Console and how their sharing and permissions work. Let’s drill down.
The Certification Drill (Simulated Question) #
Scenario #
CloudAdvisor Inc. is developing a serverless microservices application using AWS Lambda functions. The engineering team wants to maintain a standardized set of test events to validate Lambda function behavior in the development environment. These test events should be created once, and then shared with all developers in the “lambda-dev-team” IAM group. Importantly, every developer must be able to edit and update these test events as needed during development.
The Requirement #
Determine an AWS-native approach that enables easy sharing and collaborative editing of Lambda test events among the IAM developer group members without external tooling.
The Options #
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A) Create and store the test events as JSON files in an Amazon S3 bucket. Grant bucket read/write permissions to all IAM users in the developer group.
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B) Create the test events inside the AWS Lambda console and configure the built-in event sharing settings to make the test events shareable among the IAM developer group.
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C) Store the test events in an Amazon DynamoDB table. Assign IAM roles to developers granting read/write access to the table.
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D) Create the test events inside the AWS Lambda console and configure the event sharing settings to make the test events private to each developer.
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Correct Answer #
B
Quick Insight: The Developer Collaboration Imperative #
- For Developers, understanding Lambda console test event behavior is crucial.
- Lambda test events created in the console are scoped per user by default but have native sharing options.
- External storage (S3 or DynamoDB) is possible but adds complexity and deviates from the managed Lambda console workflow.
Content Locked: The Expert Analysis #
You’ve identified the answer. But do you know the implementation details that separate a Junior from a Senior?
The Expert’s Analysis #
Correct Answer #
Option B
The Winning Logic #
Lambda console test events are stored per user by default but support native event sharing functionality. By configuring the event sharing settings within the Lambda console, developers can mark specific test events as “shareable.” Shared test events become accessible and editable by other IAM users who have appropriate Lambda function permissions. This approach leverages built-in Lambda console capabilities without managing external storage or permissions separately, making collaborative development seamless and frictionless.
In the SDK or CLI, test events do not exist as a separate resource, so attempting to externalize test events to S3 or DynamoDB requires building and maintaining additional code and access policies, adding avoidable operational overhead.
The Trap (Distractor Analysis) #
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Why not A?
Storing test events as JSON files in S3 is technically possible but introduces challenges such as managing bucket policies, preventing unauthorized access, and requiring developers to manually sync or load events into Lambda. It circumvents native Lambda console workflows and increases operational complexity. -
Why not C?
Similarly, using DynamoDB to store test events requires building extra application logic to read/write events and manage granular IAM permissions. This is overengineering for a simple console-based testing scenario. -
Why not D?
Making events private to each developer defeats the requirement for shared edit access. This results in duplication and inconsistent test scenarios across the team.
The Technical Blueprint #
# Example of listing Lambda test events and setting sharing (conceptual CLI snippet - note: actual sharing is done in the Lambda console UI)
# AWS CLI does not currently provide direct test event management commands, so sharing is configured via the Console.
# Developers should:
# 1. Open the Lambda function in AWS Console
# 2. Navigate to "Test" tab
# 3. Select a test event
# 4. Use the "Share" option to make the event shareable with an IAM group
# 5. Other developers can then see and edit the shared test event.
The Comparative Analysis #
| Option | API / Console Complexity | Operational Overhead | Use Case Fit |
|---|---|---|---|
| A) S3 | Medium - Requires bucket policies and data syncing | High - Manual management of access and syncing | Possible but impractical for simple Lambda test events scenario |
| B) Lambda Console Sharing | Low - Native console UI sharing feature | Minimal - Uses built-in sharing and editing | Best fit; seamless collaborative editing in dev environment |
| C) DynamoDB | High - Requires additional app logic and IAM roles | High - Overhead of managing DB and permissions | Overengineering for test event management |
| D) Private Events | Low - Default setup per user | Low - No sharing means duplicated effort | Does not meet shared editable requirement |
Real-World Application (Practitioner Insight) #
Exam Rule #
For the exam, always pick Lambda Console Sharing when the question involves collaborative test event editing among developers.
Real World #
In production, teams often adopt centralized test frameworks or CI/CD pipeline integrations for testing Lambda functions but, for manual debugging and rapid iterations in development, native Lambda test event sharing is by far the most practical and efficient approach.
(CTA) Stop Guessing, Start Mastering #
Disclaimer
This is a study note based on simulated scenarios for the AWS DVA-C02 exam.