DVA-C02 Exam Dumps - AWS Certified Developer - Associate

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Question # 65

A company uses Amazon API Gateway to expose a set of APIs to customers. The APIs have caching enabled in API Gateway. Customers need a way to invalidate the cache for each API when they test the API.

What should a developer do to give customers the ability to invalidate the API cache?

Ask the customers to use AWS credentials to call the InvalidateCache API operation.

Attach an InvalidateCache policy to the IAM execution role that the customers use to invoke the API. Ask the customers to send a request that contains the HTTP header when they make an API call.

Ask the customers to use the AWS SDK API Gateway class to invoke the InvalidateCache API operation.

Attach an InvalidateCache policy to the IAM execution role that the customers use to invoke the API. Ask the customers to add the INVALIDATE_CACHE query string parameter when they make an API call.

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Question # 66

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?

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

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

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

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

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Question # 67

A company caches session information for a web application in an Amazon DynamoDB table. The company wants an automated way to delete old items from the table.

What is the simplest way to do this?

Write a script that deletes old records; schedule the script as a cron job on an Amazon EC2 instance.

Add an attribute with the expiration time; enable the Time To Live feature based on that attribute.

Each day, create a new table to hold session data; delete the previous day's table.

Add an attribute with the expiration time; name the attribute ItemExpiration.

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Question # 68

A developer is building an application that uses Amazon DynamoDB. The developer wants to retrieve multiple specific items from the database with a single API call. Which DynamoDB API call will meet these requirements with the MINIMUM impact on the database?

BatchGetltem

Getltem

Scan

Query

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Question # 69

A developer is building a serverless application by using AWS Serverless Application Model (AWS SAM) on multiple AWS Lambda functions.

When the application is deployed, the developer wants to shift 10% of the traffic to the new deployment of the application for the first 10 minutes after deployment. If there are no issues, all traffic must switch over to the new version.

Which change to the AWS SAM template will meet these requirements?

Set the Deployment Preference Type to Canary10Percent10Minutes. Set the AutoPublishAlias property to the Lambda alias.

Set the Deployment Preference Type to LinearlOPercentEvery10Minutes. Set AutoPubIishAIias property to the Lambda alias.

Set the Deployment Preference Type to CanaryIOPercentIOMinutes. Set the PreTraffic and PostTraffic properties to the Lambda alias.

Set the Deployment Preference Type to LinearlOPercentEveryIOMinutes. Set PreTraffic and Post Traffic properties to the Lambda alias.

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Question # 70

A company is using Amazon API Gateway to invoke a new AWS Lambda function The company has Lambda function versions in its PROD and DEV environments. In each environment, there is a Lambda function alias pointing to the corresponding Lambda function version API Gateway has one stage that is configured to point at the PROD alias

The company wants to configure API Gateway to enable the PROD and DEV Lambda function versions to be simultaneously and distinctly available

Which solution will meet these requirements?

Enable a Lambda authorizer for the Lambda function alias in API Gateway Republish PROD and create a new stage for DEV Create API Gateway stage variables for the PROD and DEV stages. Point each stage variable to the PROD Lambda authorizer to the DEV Lambda authorizer.

Set up a gateway response in API Gateway for the Lambda function alias. Republish PROD and create a new stage for DEV. Create gateway responses in API Gateway for PROD and DEV Lambda aliases

Use an environment variable for the Lambda function alias in API Gateway. Republish PROD and create a new stage for development. Create API gateway environment variables for PROD and DEV stages. Point each stage variable to the PROD Lambda function alias to the DEV Lambda function alias.

Use an API Gateway stage variable to configure the Lambda function alias Republish PROD and create a new stage for development Create API Gateway stage variables for PROD and DEV stages Point each stage variable to the PROD Lambda function alias and to the DEV Lambda function alias

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Question # 71

A developer is troubleshooting an application in an integration environment. In the application, an Amazon Simple Queue Service (Amazon SQS) queue consumes messages and then an AWS Lambda function processes the messages. The Lambda function transforms the messages and makes an API call to a third-party service.

There has been an increase in application usage. The third-party API frequently returns an HTTP 429 Too Many Requests error message. The error message prevents a significant number of messages from being processed successfully.

How can the developer resolve this issue?

Increase the SQS event source's batch size setting.

Configure provisioned concurrency for the Lambda function based on the third-party API's documented rate limits.

Increase the retry attempts and maximum event age in the Lambda function's asynchronous configuration.

Configure maximum concurrency on the SQS event source based on the third-party service's documented rate limits.

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Question # 72

An application that is deployed to Amazon EC2 is using Amazon DynamoDB. The app cation calls the DynamoDB REST API Periodically the application receives a ProvisionedThroughputExceededException error when the application writes to a DynamoDB table.

Which solutions will mitigate this error MOST cost-effectively^ (Select TWO)

Modify the application code to perform exponential back off when the error is received.

Modify the application to use the AWS SDKs for DynamoDB.

Increase the read and write throughput of the DynamoDB table.

Create a DynamoDB Accelerator (DAX) cluster for the DynamoDB table.

Create a second DynamoDB table Distribute the reads and writes between the two tables.

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