Cloud Practice

#211 (Accuracy: 100% / 4 votes)

A developer is writing an application that runs on Amazon EC2 instances in an Auto Scaling group The application data is stored in an Amazon DynamoDB table and records are constantly updated by all instances. An instance sometimes retrieves old data. The developer wants to correct this by making sure the reads are strongly consistent.

How can the developer accomplish this?

A. Set ConsistentRead to true when calling GetItem.
B. Create a new DynamoDB Accelerator (DAX) table
C. Set Consistency to strong when calling UpdateTable.
D. Use the GetShardIterator command.

#212 (Accuracy: 93% / 5 votes)

A developer uses the Amazon S3 ListObjectsV2 API call to retrieve and list object keys from an S3 bucket. The list can contain thousands of keys, and the retrieval often returns more than the max-keys maximum value. The code must handle any number of returned results.

How can the developer modify the code to handle any number of returns?

A. Set max-keys in the ListObjectsV2 API call to the expected number of returned objects.
B. Set max-keys in the ListObjectsV2 API call to -1.
C. Run an S3 Select query to retrieve and list object keys from the bucket.
D. When applicable, repeat the ListObjectsV2 API call by using NextContinuationToken.

#213 (Accuracy: 100% / 3 votes)

A developer has written an application that runs on Amazon EC2 instances. The developer is adding functionality for the application to write objects to an Amazon S3 bucket.

Which policy must the developer modify to allow the instances to write these objects?

A. The IAM policy that is attached to the EC2 instance profile role.
B. The session policy that is applied to the EC2 instance role session.
C. The AWS Key Management Service (AWS KMS) key policy that is attached to the EC2 instance profile role.
D. The Amazon VPC endpoint policy.

#214 (Accuracy: 100% / 4 votes)

A developer is building a static, client-side rendered website that is powered by ReactJS. The code has no server-side generated components and does not need to run any programming languages on the server. However, the code serves static HTML, CSS, and JavaScript to the client on each request. The developer’s solution to host the website must maximize performance and cost-effectiveness.

Which combination of AWS services or resources should the developer use to meet these requirements?

A. Application Load Balancer and Amazon EC2
B. Amazon API Gateway and AWS Lambda
C. Amazon CloudFront and Amazon S3
D. Amazon CloudFront and AWS Elastic Beanstalk

#215 (Accuracy: 100% / 4 votes)

An application adds a processing date to each transaction that it receives. The application writes each transaction to an Amazon DynamoDB table by using the PutItem operation. Each transaction has a unique ID (transactionID). Sometimes the application receives transactions more than once.

A developer notices that duplicate transactions in DynamoDB have the latest processing date instead of the date when the transaction was first received. Duplicate records happen infrequently, and most of the transactions are unique.

What is the MOST cost-effective solution that the developer can implement to ensure that PutItem does not update an existing record?

A. Call the GetItem operation first to confirm that the record does not exist. Then call PutItem.
B. Enable the TTL attribute on the DynamoDB table.
C. Implement a conditional put by using the attribute_exists(transactionID) condition expression.
D. Implement a conditional put by using the attribute_not_exists(transactionID) condition expression.

#216 (Accuracy: 100% / 4 votes)

A developer is creating a template that uses AWS CloudFormation to deploy an application. The application is serverless and uses Amazon API Gateway. Amazon DynamoDB, and AWS Lambda.

Which AWS service or tool should the developer use to define serverless resources in YAML?

A. CloudFormation serverless intrinsic functions
B. AWS Elastic Beanstalk
C. AWS Serverless Application Model (AWS SAM)
D. AWS Cloud Development Kit (AWS CDK)

#217 (Accuracy: 100% / 4 votes)

A company has three different environments: Development. QA, and Production. The company wants to deploy its code first in the Development environment, then QA, and then Production.

Which AWS service can be used to meet this requirement?

A. Use AWS CodeCommit to create multiple repositories to deploy the application.
B. Use AWS CodeBuild to create, configure, and deploy multiple build application projects.
C. Use AWS Data Pipeline to create multiple data pipeline provisions to deploy the application.
D. Use AWS CodeDeploy to create multiple deployment groups.

#218 (Accuracy: 100% / 3 votes)

A developer is using an AWS CodePipeline pipeline to provide continuous integration and continuous delivery (CI/CD) support for a Java application. The developer needs to update the pipeline to support the introduction of a new application dependency .jar file. The pipeline must start a build when a new version of the .jar file becomes available.

Which solution will meet these requirements?

A. Create an Amazon S3 bucket to store the dependency .jar file. Publish the dependency .jar file to the S3 bucket. Use an Amazon Simple Notification Service (Amazon SNS) notification to start a CodePipeline pipeline build.
B. Create an Amazon Elastic Container Registry (Amazon ECR) private repository. Publish the dependency jar file to the repository. Use an ECR source action to start a CodePipeline pipeline build.
C. Create an Amazon Elastic Container Registry (Amazon ECR) private repository. Publish the dependency .jar file to the repository. Use an Amazon Simple Notification Service (Amazon SNS) notification to start a CodePipeline pipeline build.
D. Create an AWS CodeArtifact repository. Publish the dependency .jar file to the repository. Use an Amazon EventBridge (Amazon CloudWatch Events) rule to start a CodePipeline pipeline build.

#219 (Accuracy: 100% / 4 votes)

A developer is writing a new serverless application for a company. Several other developers must collaborate on the code for this application, and the company expects frequent changes to the code. The developer needs to deploy the code from source control to AWS Lambda with the fewest number of manual steps.

Which strategy for the build and deployment should the developer use to meet these requirements?

A. Build the code locally, and then upload the code into the source control system. When a release is needed, run AWS CodePipeline to extract the uploaded build and deploy the resources.
B. Use the AWS Serverless Application Model (AWS SAM) CLI to build and deploy the application from the developer's local machine with the latest version checked out locally.
C. Use AWS CodeBuild and AWS CodePipeline to invoke builds and corresponding deployments when configured source controlled branches have pull requests merged into them
D. Use the Lambda console to upload a .zip file of the application that is created by the AWS Serverless Application Model (AWS SAM) CLI build command.

#220 (Accuracy: 100% / 4 votes)

Two containerized microservices are hosted on Amazon EC2 ECS. The first microservice reads an Amazon RDS Aurora database instance, and the second microservice reads an Amazon DynamoDB table.

How can each microservice be granted the minimum privileges?

A. Set ECS_ENABLE_TASK_IAM_ROLE to false on EC2 instance boot in ECS agent configuration file. Run the first microservice with an IAM role for ECS tasks with read-only access for the Aurora database. Run the second microservice with an IAM role for ECS tasks with read-only access to DynamoDB.
B. Set ECS_ENABLE_TASK_IAM_ROLE to false on EC2 instance boot in the ECS agent configuration file. Grant the instance profile role read-only access to the Aurora database and DynamoDB.
C. Set ECS_ENABLE_TASK_IAM_ROLE to true on EC2 instance boot in the ECS agent configuration file. Run the first microservice with an IAM role for ECS tasks with read-only access for the Aurora database. Run the second microservice with an IAM role for ECS tasks with read-only access to DynamoDB.
D. Set ECS_ENABLE_TASK_IAM_ROLE to true on EC2 instance boot in the ECS agent configuration file. Grant the instance profile role read-only access to the Aurora database and DynamoDB.

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