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 1AM 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
A developer is troubleshooting a three-tier application, which is deployed on Amazon EC2 instances. There is a connectivity problem between the application servers and the database servers.
Which AWS services or tools should be used to identify the faulty component? (Select TWO.)
A. AWS CloudTrail.
B. AWS Trusted Advisor
C. Amazon VPC Flow Logs
D. Network access control lists
E. AWS Config rules
An application uses Amazon DynamoDB as its backend database The application experiences sudden spikes in traffic over the weekend and variable but predictable spikes during weekdays The capacity needs to be set to avoid throttling errors at all times
How can this be accomplished cost-effectively?
A. Use provisioned capacity with AWS Auto Scaling throughout the week.
B. Use on-demand capacity for the weekend and provisioned capacity with AWS Auto Scaling during the weekdays
C. Use on-demand capacity throughout the week
D. Use provisioned capacity with AWS Auto Scaling enabled during the weekend and reserved capacity enabled during the weekdays
A developer has created an AWS Lambda function that is written in Python The Lambda function reads data from objects in Amazon S3 and writes data to an Amazon DynamoDB table
The function is successfully invoked from an S3 event notification when an object is created However, the function fails when if attempts to write to the DynamoDB table
What is the MOST likely cause of this issue?
A. The Lambda function's concurrency limit has been exceeded
B. The DynamoDB table requires a global secondary index (GSI) to support writes.
C. The Lambda function does not have 1AM permissions to write to DynamoDB ID.
D. The DynamoDB table is not running in the same Availability Zone as the Lambda function.
A Lambda function processes data before sending it to a downstream service Each piece of data is approximately 1 MB in size After a security audit, the function t]is now required to encrypt the data before sending it downstream Which API call is required to perform the encryption?
A. Pass the data to the KMS ReEncrypi API for encryption
B. Use the KMS GenerateDataKey API to get an encryption key
C. Use the KMS GenerateDataKeyWithoutPlain.Text API to get an encryption key
D. Pass the data to KMS as part of the Encrypt API for encryption
A company has three AWS Lambda functions that are written in Node js The Lambda functions include a mix of custom code and open-source modules When bugs are occasionally detected in the open-source modules, all three Lambda functions must be patched.
What is the MOST operationally efficient solution to deploy a patched open-source library for all three Lambda functions?
A. Create a custom AWS CloudFormation public registry extension Reference a GitHub repository that hosts the open-source modules m the extension Configure Formation to scan the repository once each day Write an AWS Serverless Application Model (AWS SAM) template to redeploy the three Lambda functions upon a scan notification change.
B. Create an Amazon CloudFront distribution with an Amazon S3 bucket as the origin Upload the patched modules to Amazon S3 when needed Modify each Lambda function to download the patched modules from the CloudFront distribution during the cold start.
C. Launch an Amazon EC2 instance Host a private open-source module registry on the EC2 instance Upload the modified open-source modules to the private registry when needed. Modify each Lambda function deployment script to download the modules from the private registry Redeploy the three new Lambda functions.
D. Create a Lambda layer with the open-source modules Modify all three Lambda functions to depend on the layer Remove the open-source modules from each Lambda function Patch the Lambda layer with the modified open-source modules when needed Update the Lambda functions to reference the new layer version
A developer has written an application that writes data to Amazon DynamoDB-The DynamoDB table has been configured to use conditional writes During peak usage times, writes are failing due to a CondittonatCheckFailedException error.
How can the developer increase the application's reliability when multiple clients are attempting to write to the same record?
A. Write the data to an Amazon SNS topic.
B. Increase the amount of write capacity for the table to anticipate short-term spikes or bursts m write operations
C. Implement a caching solution, such as DynamoDB Accelerator or Amazon ElastiCache.
D. Implement error retries and exponential backoff with jitter.
A company is using continuous integration/continuous deliver (CI/CD) system. A developer must automate the deployment of an application software package to Amazon EC2 instances and virtual servers that run on premises.
Which AWS services should the developer use to meet these requirements?
A. AWS Cloud9
B. AWS CodeBuild
C. AWS Elastic Beanstalk
D. AWS CodeDeploy
A developer must extend an existing application that is based on the AWS Services Application Model (AWS SAM). The developer has used the AWS SAM CLI to create the project. The project contains different AWS Lambda functions.
Which combination of commands must the developer use to redeploy the AWS SAM application (Select TWO.)
A. Sam init
B. Sam validate
C. Sam build
D. Sam deploy
E. Sam publish
A developer must increase read performance from an unencrypted Amazon S3 bucket. The application requires 100.000 read requests each second Cost-effectiveness is a priority. What would be the SIMPLEST approach to implement these requirements?
A. Create 20 or more prefixes in Amazon S3 Place files by prefixes. Read in parallel by prefixes
B. Create 20 of more AWS accounts Create a bucket in each account Read in parallel by bucket
C. Deploy Memcached on Amazon EC2 Cache the files in memory Retrieve from the Memcached cache
D. Copy all files to Amazon DynamoDB Index the files with S3 metadata Retrieve from DynamoDB
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