A developer at a company writes an AWS CloudFormation template. The template refers to subnets that were created by a separate AWS CloudFormation template that the company's network team wrote. When the developer attempts to launch the stack for the first time, the launch fails.
Which template coding mistakes could have caused this failure? (Choose two.)
A. The developer's template does not use the Ref intrinsic function to refer to the subnets.
B. The developer's template does not use the ImportValue intrinsic function to refer to the subnets.
C. The Mappings section of the developer's template does not refer to the subnets.
D. The network team's template does not export the subnets in the Outputs section.
E. The network team's template does not export the subnets in the Mappings section.
A developer has created an AWS Lambda function for a company's application. The developer must make the Lambda function available for other developers at the company to deploy as needed. The other developers must be able to use
the application without needing to configure the environment or resources.
The developer decides to publish the application in the AWS Serverless Application Repository and needs to build the AWS Serverless Application Model (AWS SAM) template for the deployment.
Which sections is the developer required to include in the template? (Choose two.)
A. Resources
B. Parameters
C. Metadata
D. Globals
E. Transform
A developer is creating an application that generates real-time transaction data. Two systems need to process the data. One system must process the data in real time, and the other system must audit the data each night. The two systems must process the data in the same order.
What should the developer do to meet these requirements?
A. Send the transaction data to an Amazon Simple Queue Service (Amazon SQS) standard queue. Configure the two systems as subscribers of the queue.
B. Send the transaction data to an Amazon Simple Queue Service (Amazon SQS) FIFO queue. Configure the two systems as subscribers of the queue.
C. Send the transaction data to an Amazon Kinesis data stream. Configure the two systems as consumers of the data stream.
D. Send the transaction data to an Amazon Simple Notification Service (Amazon SNS) standard topic. Configure the two systems as subscribers of the topic.
A developer must cache dependent artifacts from Maven Central, a public package repository, as part of an application's build pipeline. The build pipeline has an AWS CodeArtifact repository where artifacts of the build are published. The developer needs a solution that requires minimum changes to the build pipeline.
Which solution meets these requirements?
A. Modify the existing CodeArtifact repository to associate an upstream repository with the public package repository
B. Create a new CodeArtifact repository that has an external connection to the public package repository
C. Create a new CodeArtifact domain that contains a new repository that has an external connection to the public package repository.
D. Modify the CodeArtifact repository resource policy to allow artifacts to be fetched from the public package repository
A developer creates an Amazon S3 bucket to store project status files that are uploaded hourly. The developer also creates an AWS Lambda function that will be used to process the project status files. What should the developer do to invoke the function with the LEAST amount of AWS infrastructure?
A. Create an Amazon EventBridge (Amazon CloudWatch Events) rule to invoke the function every 5 minutes and scan for new objects.
B. Create an S3 event notification to invoke the function when a new object is created in the S3 bucket.
C. Create an S3 event notification that publishes a message to an Amazon Simple Notification Service (Amazon SNS) topic. Subscribe the function to the SNS topic.
D. Create an S3 event notification that adds a message to an Amazon Simple Queue Service (Amazon SQS) queue. Configure the function to poll the queue.
A company has a three-tier application that is deployed in Amazon Elastic Container Service (Amazon ECS). The application is using an Amazon RDS for MySQL DB instance. The application performs more database reads than writes. During times of peak usage, the application's performance degrades. When this performance degradation occurs, the DB instance's ReadLatency metric in Amazon CloudWatch increases suddenly.
How should a developer modify the application to improve performance?
A. Use Amazon ElastiCache to cache query results
B. Scale the ECS cluster to contain more ECS instances
C. Add read capacity units (RCUs) to the DB instance
D. Modify the ECS task definition to increase the task memory
A company is running an application on AWS Elastic Beanstalk in a single-instance environment. The company's deployments must avoid any downtime. Which deployment option will meet these requirements?
A. All at once
B. Rolling
C. Rolling with additional batch
D. Immutable
A company is adding items to an Amazon DynamoDB table from an AWS Lambda function that is written in Python. A developer needs to implement a solution that inserts records in the DynamoDB table and performs automatic retry when the insert fails.
Which solution meets these requirements with MINIMUM code changes?
A. Configure the Python code to run the AWS CLI through shell to call the PutItem operation
B. Call the PutItem operation from Python by using the DynamoDB HTTP API
C. Queue the items in AWS Glue, which will put them into the DynamoDB table
D. Use the AWS software development kit (SDK) for Python (boto3) to call the PutItem operation
A developer is developing an application that uses signed requests (Signature Version 4) to call other AWS services. The developer has created a canonical request, has created the string to sign, and has calculated signing information. Which methods could the developer use to complete a signed request? (Choose two.)
A. Add the signature to an HTTP header that is named Authorization
B. Add the signature to a session cookie
C. Add the signature to an HTTP header that is named Authentication
D. Add the signature to a query string parameter that is named X-Amz-Signature
E. Add the signature to an HTTP header that is named WWW-Authenticate
A company has an AWS Lambda function that runs hourly, reads log files that are stored in Amazon S3, and forwards alerts to Amazon Simple Notification Service (Amazon SNS) topics based on content. A developer wants to add a custom metric to the Lambda function to track the number of alerts of each type for each run. The developer needs to log this information in Amazon CloudWatch in a metric that is named Lambda/AlertCounts.
How should the developer modify the Lambda function to meet this requirement with the LEAST operational overhead?
A. Add a print statement to standard out for each alert and the number of occurrences.
B. Add a call to the PutMetricData API operation. Pass an array for alerts and the number of occurrences in the Values and Counts fields with a namespace of “Lambda/AlertCounts”.
C. Add a call to the PutMetricAlarm API operation. Pass an array of alerts in the metrics member with the namespace of “Lambda/AlertCounts”.
D. Add a call to the PutDashboard API operation. Pass an array of alerts in the metrics member with the namespace of “Lambda/AlertCounts”.
Nowadays, the certification exams become more and more important and required by more and more enterprises when applying for a job. But how to prepare for the exam effectively? How to prepare for the exam in a short time with less efforts? How to get a ideal result and how to find the most reliable resources? Here on Vcedump.com, you will find all the answers. Vcedump.com provide not only Amazon exam questions, answers and explanations but also complete assistance on your exam preparation and certification application. If you are confused on your DVA-C01 exam preparations and Amazon certification application, do not hesitate to visit our Vcedump.com to find your solutions here.