Amazon Exam DVA-C02 Topic 7 Question 31 Discussion

Actual exam question for Amazon's DVA-C02 exam

Question #: 31
Topic #: 7

A developer maintains a critical business application that uses Amazon DynamoDB as the primary data store The DynamoDB table contains millions of documents and receives 30-60 requests each minute The developer needs to perform processing in near-real time on the documents when they are added or updated in the DynamoDB table

How can the developer implement this feature with the LEAST amount of change to the existing application code?

ASet up a cron job on an Amazon EC2 instance Run a script every hour to query the table for changes and process the documents

BEnable a DynamoDB stream on the table Invoke an AWS Lambda function to process the documents.

CUpdate the application to send a PutEvents request to Amazon EventBridge. Create an EventBridge rule to invoke an AWS Lambda function to process the documents.

DUpdate the application to synchronously process the documents directly after the DynamoDB write

Show Suggested Answer

Suggested Answer: B

DynamoDB Streams:Capture near real-time changes to DynamoDB tables, triggering downstream actions.

Lambda for Processing:Lambda functions provide a serverless way to execute code in response to events like DynamoDB Stream updates.

Minimal Code Changes:This solution requires the least modifications to the existing application.

DynamoDB Streams:https://docs.aws.amazon.com/amazondynamodb/latest/developerguide/Streams.html

AWS Lambda:https://aws.amazon.com/lambda/

by Ashlee at Jul 08, 2024, 02:36 PM

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Catrice

5 months ago

Option B is the way to go. It's the 'DynamoDB-stream-and-Lambda' special - the peanut butter and jelly of serverless solutions!

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Jesusita

5 months ago

C seems like a bit of overkill for this use case. EventBridge is great, but do we really need the extra layer of complexity here?

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Francoise

3 months ago

Let's go with option B then. It's the most straightforward solution for near-real time processing.

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Kallie

3 months ago

I think option B is the best choice. Using DynamoDB streams and Lambda would be efficient.

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Vesta

3 months ago

I agree, C does seem like overkill. We should go with a simpler solution.

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Rosenda

3 months ago

D) Updating the application to process the documents directly after the DynamoDB write seems like a more straightforward approach.

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Yasuko

4 months ago

C) I agree, using EventBridge might be too complex for this scenario.

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France

4 months ago

B) Enable a DynamoDB stream on the table Invoke an AWS Lambda function to process the documents.

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Jarod

5 months ago

I prefer option C. Sending PutEvents to EventBridge and invoking Lambda seems like a cleaner solution to me.

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Janna

5 months ago

I'd steer clear of A. Running a cron job to query the table for changes? That's just begging for performance issues and latency problems.

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Chauncey

5 months ago

D? Really? Synchronously processing documents after a DynamoDB write? That's a recipe for disaster with millions of documents and 30-60 requests per minute!

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Dexter

5 months ago

I agree with Shanice. Option B is the most efficient way to implement this feature with minimal code changes.

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Leeann

5 months ago

Option B all the way! Leveraging DynamoDB streams and Lambda is the cleanest solution to handle near-real-time processing without disrupting the existing app code.

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Malinda

4 months ago

I agree, using DynamoDB streams and Lambda is the way to go for this scenario.

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Glory

4 months ago

Definitely! It's a seamless way to handle the processing without causing disruptions.

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Shonda

4 months ago

That's a great choice! It allows for near-real-time processing without changing much of the existing code.

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Vernice

4 months ago

I agree, using DynamoDB streams and Lambda is the way to go for near-real-time processing.

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Thaddeus

5 months ago

B) Enable a DynamoDB stream on the table Invoke an AWS Lambda function to process the documents.

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Arlene

5 months ago

B) Enable a DynamoDB stream on the table Invoke an AWS Lambda function to process the documents.

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Shanice

5 months ago

I think option B is the best choice. Using DynamoDB streams with Lambda will allow for near-real time processing.

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