An application interacts with Amazon Aurora to store and track customer information. The primary database is set up with multiple read replicas for improving the performance of the read queries. However, one of the Aurora replicas is receiving most or all of the traffic, while the other Aurora replica remains idle. How can this issue be resolved?
A. Disable application-level DNS caching.
B. Enable application-level DNS caching.
C. Enable application pooling.
D. Disable application pooling.
An application interacts with Amazon Aurora to store and track customer information. The primary database is set up with multiple read replicas for improving the performance of the read queries. However, one of the Aurora replicas is receiving most or all of the traffic, while the other Aurora replica remains idle. How can this issue be resolved?
A. Disable application-level DNS caching.
B. Enable application-level DNS caching.
C. Enable application pooling.
D. Disable application pooling.
A company has a website that is developed in PHP and is launched using AWS Elastic Beanstalk. There is a new version of the website that needs to be deployed in the Elastic Beanstalk environment. The company cannot tolerate having the website offline if an update fails. Deployments must have minimal impact and rollback as soon as possible.
A. All at once
B. Rolling
C. Snapshots
D. Immutable
A developer is building a microservice that uses AWS Lambda to process messages from an Amazon Simple Queue Service (Amazon SQS) standard queue. The Lambda function calls external APIs to enrich the SOS message data before loading the data into an Amazon Redshift data warehouse. The SOS queue must handle a maximum of 1.000 messages per second. During initial testing, the Lambda function repeatedly inserted duplicate data into the Amazon Redshift table. The duplicate data led to a problem with data analysis. All duplicate messages were submitted to the queue within 1 minute of each other. How should the developer resolve this issue?
A. Create an SOS FIFO queue. Enable message deduplication on the SOS FIFO queue.
B. Reduce the maximum Lambda concurrency that the SOS queue can invoke.
C. Use Lambda's temporary storage to keep track of processed message identifiers.
D. Configure a message group ID for every sent message. Enable message deduplication on the SQS standard queue.
A developer used the AWS SDK to create an application that aggregates and produces log records for 10 services. The application delivers data to an Amazon Kinesis Data Streams stream. Each record contains a log message with a service name, creation timestamp, and other log information. The stream has 15 shards in provisioned capacity mode. The stream uses service name as the partition key. The developer notices that when all the services are producing logs, ProvisionedThroughputExceededException errors occur during PutRecord requests. The stream metrics show that the write capacity the applications use is below the provisioned capacity.
A. Change the capacity mode from provisioned to on-demand.
B. Double the number of shards until the throttling errors stop occurring.
C. Change the partition key from service name to creation timestamp.
D. Use a separate Kinesis stream for each service to generate the logs.
A developer is implementing a serverless application by using AWS CloudFormation to provision Amazon S3 web hosting. Amazon API Gateway, and AWS Lambda functions. The Lambda function source code is zipped and uploaded to an S3 bucket. The S3 object key of the zipped source code is specified in the Lambda resource in the CloudFormation template. The developer notices that there are no changes in the Lambda function every time the CloudFormation stack is updated. How can the developer resolve this issue?
A. Create a new Lambda function alias before updating the CloudFormation stack.
B. Change the S3 object key or the S3 version in the CloudFormation template before updating the CloudFormation stack.
C. Upload the zipped source code to another S3 bucket before updating the CloudFormation stack.
D. Associate a code signing configuration with the Lambda function before updating the CloudFormation stack.
A developer is creating an AWS Lambda function that needs network access to private resources in a VPC.
A. Attach the Lambda function to the VPC through private subnets. Create a security group
that allows network access to the private resources. Associate the security group with the
Lambda function.
B. Configure the Lambda function to route traffic through a VPN connection. Create a security group that allows network access to the private resources. Associate the security group with the Lambda function.
C. Configure a VPC endpoint connection for the Lambda function. Set up the VPC endpoint to route traffic through a NAT gateway.
D. Configure an AWS PrivateLink endpoint for the private resources. Configure the Lambda function to reference the PrivateLink endpoint.
A company is building a new application that runs on AWS and uses Amazon API Gateway to expose APIs Teams of developers are working on separate components of the application in parallel The company wants to publish an API without an integrated backend so that teams that depend on the application backend can continue the development work before the API backend development is complete. Which solution will meet these requirements?
A. Create API Gateway resources and set the integration type value to MOCK Configure
the method integration request and integration response to associate a response with an
HTTP status code Create an API Gateway stage and deploy the API.
B. Create an AWS Lambda function that returns mocked responses and various HTTP status codes. Create API Gateway resources and set the integration type value to AWS_PROXY Deploy the API.
C. Create an EC2 application that returns mocked HTTP responses Create API Gateway resources and set the integration type value to AWS Create an API Gateway stage and deploy the API.
D. Create API Gateway resources and set the integration type value set to HTTP_PROXY. Add mapping templates and deploy the API. Create an AWS Lambda layer that returns various HTTP status codes Associate the Lambda layer with the API deployment
A developer is creating an application that must transfer expired items from Amazon DynamoDB to Amazon S3. The developer sets up the DynamoDB table to automatically delete items after a specific TTL. The application must process the items in DynamoDB and then must store the expired items in Amazon S3. The entire process, including item processing and storage in Amazon S3, will take 5 minutes. Which solution will meet these requirements with the LEAST operational overhead?
A. Configure DynamoDB Accelerator (DAX) lo query for expired items based on the TTL
Save the results to Amazon S3.
B. Configure DynamoDB Streams to invoke an AWS Lambda function. Program the Lambda function to process the items and to store the expired items in Amazon S3.
C. Deploy a custom application on an Amazon Elastic Container Service (Amazon ECS) cluster on Amazon EC2 instances. Program the custom application to process the items and to store the expired items in Amazon S3.
D. Create an Amazon EventBridge rule to invoke an AWS Lambda function. Program the Lambda function to process The items and to store the expired items in Amazon S3.
A developer created a Node.js-based AWS Lambda function by using a container image of an AWS OS-only base image. There is a new security patch for Node.js that must be patched to the new Lambda function. Which solution will meet this requirement?
A. Set the runtime update mode of the Lambda function to Auto.
B. Patch the runtime version by redeploying the same version of the Lambda function.
C. Rebuild the Lambda container code with the latest version of the AWS OS base image. Publish a new version of the Lambda function.
D. Rebuild the Lambda container code with the latest Node.js patch version. Publish a new version of the Lambda function.