Amazon Exam DVA-C02 Topic 2 Question 21 Discussion

Actual exam question for Amazon's DVA-C02 exam

Question #: 21
Topic #: 2

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 Audra at Mar 08, 2024, 12:10 PM

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Lura

10 months ago

Candidate 6: Agreed, I think I would go with option B as well to ensure efficient processing of documents without complicating the existing application too much.

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Valda

10 months ago

Candidate 5: Overall, it seems like the majority prefers option B for implementing near-real time processing with the least amount of code changes.

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Linwood

10 months ago

Candidate 4: I think option D would require the most changes to the existing code since we would need to update the application to process documents synchronously after every write.

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Jerry

10 months ago

Candidate 3: Option C could also work, but it involves updating the application code to send PutEvents requests to EventBridge, which might require more changes than option B.

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Glenna

10 months ago

Candidate 2: I agree with that, setting up a cron job with option A seems like it would introduce unnecessary delays in processing the documents.

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Stephaine

10 months ago

Candidate 1: I think option B is the best choice because enabling a DynamoDB stream will allow us to process documents in near-real time with minimal code changes.

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Leonora

10 months ago

I see your point, but we also need to consider the cost implications of setting up and maintaining a DynamoDB stream and Lambda function in option B.

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Myra

11 months ago

I still think option B is the way to go since it offers a more scalable and reliable solution for near-real time processing.

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Hillary

11 months ago

That's true, but processing documents synchronously could potentially impact the performance of the application during peak times.

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Ronnie

11 months ago

But wouldn't option D be simpler since we can just update the application code to process the documents synchronously after the write?

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Carmelina

12 months ago

I agree, setting up a DynamoDB stream to trigger a Lambda function is a more efficient way to handle real-time processing.

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Viva

1 years ago

I think option B is the best choice because it allows for near-real time processing without changing much of the existing application code.

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James

1 years ago

I'm leaning towards option C. Sending a PutEvents request to EventBridge and using a rule to trigger a Lambda function could be a nice, event-driven solution. And it doesn't require too many changes to the existing code.

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Kendra

1 years ago

And it keeps the application code more streamlined without the need for frequent script executions.

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Lizette

1 years ago

It's definitely a more efficient way to handle near-real-time processing of documents in DynamoDB.

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Lisha

1 years ago

I agree. Using EventBridge to trigger a Lambda function seems like a clean solution.

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Carline

1 years ago

Option C sounds like a good choice. It allows for event-driven processing with minimal code changes.

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Elina

1 years ago

Ah, the age-old dilemma of 'least amount of change' versus 'most efficient solution'. Option D may be the fastest, but it could also slow down the main application, so that's probably not the way to go.

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Vinnie

1 years ago

I think option B is the best choice here. Enabling a DynamoDB stream and invoking a Lambda function to process the documents seems like the most straightforward approach.

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Franchesca

1 years ago

This question is a bit tricky. The key is to find the solution that requires the least amount of change to the existing application code.

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