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DVA-C02 Exam Guide - DVA-C02 Test Questions & DVA-C02 Exam Torrent

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DVA-C02 Exam Guide - DVA-C02 Test Questions & DVA-C02 Exam Torrent

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Amazon AWS Certified Developer - Associate Sample Questions (Q62-Q67):NEW QUESTION # 62
A developer is troubleshooting an Amazon API Gateway API Clients are receiving HTTP 400 response errors when the clients try to access an endpoint of the API.
How can the developer determine the cause of these errors?
  • A. Create an Amazon Kinesis Data Firehose delivery stream to receive API call logs from API Gateway. Configure Amazon CloudWatch Logs as the delivery stream's destination.
  • B. Turn on execution logging and access logging in Amazon CloudWatch Logs for the API stage. Create a CloudWatch Logs log group. Specify the Amazon Resource Name (ARN) of the log group for the API stage.
  • C. Turn on AWS CloudTrail Insights and create a trail Specify the Amazon Resource Name (ARN) of the trail for the stage of the API.
  • D. Turn on AWS X-Ray for the API stage Create an Amazon CtoudWalch Logs log group Specify the Amazon Resource Name (ARN) of the log group for the API stage.
Answer: B
Explanation:
This solution will meet the requirements by using Amazon CloudWatch Logs to capture and analyze the logs from API Gateway. Amazon CloudWatch Logs is a service that monitors, stores, and accesses log files from AWS resources. The developer can turn on execution logging and access logging in Amazon CloudWatch Logs for the API stage, which enables logging information about API execution and client access to the API. The developer can create a CloudWatch Logs log group, which is a collection of log streams that share the same retention, monitoring, and access control settings. The developer can specify the Amazon Resource Name (ARN) of the log group for the API stage, which instructs API Gateway to send the logs to the specified log group. The developer can then examine the logs to determine the cause of the HTTP 400 response errors. Option A is not optimal because it will create an Amazon Kinesis Data Firehose delivery stream to receive API call logs from API Gateway, which may introduce additional costs and complexity for delivering and processing streaming data. Option B is not optimal because it will turn on AWS CloudTrail Insights and create a trail, which is a feature that helps identify and troubleshoot unusual API activity or operational issues, not HTTP response errors. Option C is not optimal because it will turn on AWS X-Ray for the API stage, which is a service that helps analyze and debug distributed applications, not HTTP response errors.

NEW QUESTION # 63
A developer has an application that uses an Amazon DynamoDB table with a configured local secondary index (LSI). During application testing, the DynamoDB table metrics report a ProvisionedThroughputExceededException error message. The number of requests made by the test suite did not exceed the table's provisioned capacity limits.
What is the cause of this issue?
  • A. The LSI's capacity is different from the table's capacity.
  • B. The application is not implementing exponential backoff retry logic while interacting with the DynamoDB API.
  • C. The data in the table's partition key column is not evenly distributed.
  • D. The application has the IAM permission to query the DynamoDB table but not to query the LSI.
Answer: C

NEW QUESTION # 64
A company has an application that receives batches of orders from partners every day. The application uses an AWS Lambda function to process the batches.
If a batch contains no orders, the Lambda function must publish to an Amazon Simple Notification Service (Amazon SNS) topic as soon as possible.
Which combination of steps will meet this requirement with the LEAST implementation effort?
(Choose two.)
  • A. Modify the existing Lambda function to log orders to an Amazon Kinesis data stream.
  • B. Schedule a new Lambda function to analyze Amazon CloudWatch metrics every 24 hours to identify batches that contain no orders. Configure the Lambda function to publish to the SNS topic.
  • C. Create a new Lambda function as an Amazon Kinesis data stream consumer. Configure the new Lambda function to track orders and to publish to the SNS topic when a batch contains no orders.
  • D. Set up an Amazon CloudWatch alarm that will send a notification to the SNS topic when the value of the custom metric is 0.
  • E. Update the existing Lambda function's code to send an Amazon CloudWatch custom metric for the number of orders in a batch for each partner.
Answer: D,E

NEW QUESTION # 65
A real-time messaging application uses Amazon API Gateway WebSocket APIs with backend HTTP service.
A developer needs to build a feature in the application to identify a client that keeps connecting to and disconnecting from the WebSocket connection. The developer also needs the ability to remove the client Which combination of changes should the developer make to the application to meet these requirements?
(Select TWO.)
  • A. Use the callback URL to disconnect the client from the backend service.
  • B. Switch to HTTP APIs in the backend service.
  • C. Implement $connect and $disconnect routes in the backend service.
  • D. Switch to REST APIs in the backend service.
  • E. Add code to track the client status in Amazon ElastiCache in the backend service.
Answer: C,E
Explanation:
Requirement Summary:
* WebSocket-based messaging app using API Gateway WebSocket APIs
* Need to:
* Identify clients repeatedly connecting/disconnecting
* Be able to remove problematic clients
Evaluate Options:
A). Switch to HTTP APIs
* HTTP APIs don't support WebSocket connections
B). Switch to REST APIs
* REST APIs are not compatible with WebSockets
C). Use the callback URL to disconnect clients
* ## Possible, but not a direct option
* Callback URLs are used for sending messages to connected clients, not for disconnecting D). Track client status in ElastiCache
* Good solution: Store and update connection state (connected, disconnected, timestamps)
* Helps track abuse or reconnections
E). Implement $connect and $disconnect routes
* Required to capture connection lifecycle events
* These can be used to log/store client behavior and decide on removal
* WebSocket routes in API Gateway: https://docs.aws.amazon.com/apigateway/latest/developerguide
/apigateway-websocket-api-route-selection.html
* Managing WebSocket connections: https://docs.aws.amazon.com/apigateway/latest/developerguide
/apigateway-websocket-api-mapping-template-reference.html

NEW QUESTION # 66
A company runs an AWS CodeBuild project on medium-sized Amazon EC2 instances. The company wants to cost optimize the project and reduce the provisioning time.
  • A. Select AWS Lambda as the compute mode for the CodeBuild project.
  • B. Set up Amazon S3 caching for the CodeBuild project.
  • C. Configure the project to run on a CodeBuild on-demand fleet.
  • D. Configure the project to run on a CodeBuild reserved capacity fleet.
Answer: B
Explanation:
Comprehensive and Detailed Step-by-Step Explanation:
* Option D: Set up Amazon S3 Caching for CodeBuild:
* CodeBuild supports S3 caching to store intermediate build artifacts and dependencies. This reduces the time required to download dependencies during subsequent builds, effectively lowering costs and improving build performance.
* By using S3 caching, developers can optimize costs without changing the compute type or adding complexity.
* Why Other Options Are Incorrect:
* Option A: CodeBuild does not have a "reserved capacity fleet" option.
* Option B: AWS Lambda cannot be used as the compute mode for CodeBuild projects.
CodeBuild uses its own managed build environments.
* Option C: CodeBuild already operates on an on-demand basis, so this does not address the need for optimization or reduced provisioning time.
References:
* AWS CodeBuild Caching Documentation

NEW QUESTION # 67
......
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