Amazon AWS Certified Developer - Associate DVA-C02
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#81 (Accuracy: 100% / 8 votes)
A company stores its data in data tables in a series of Amazon S3 buckets. The company received an alert that customer credit card information might have been exposed in a data table on one of the company's public applications. A developer needs to identify all potential exposures within the application environment.

Which solution will meet these requirements?
  • A. Use Amazon Athena to run a job on the S3 buckets that contain the affected data. Filter the findings by using the SensitiveData:S3Object/Personal finding type.
  • B. Use Amazon Macie to run a job on the S3 buckets that contain the affected data. Filter the findings by using the SensitiveData:S3Object/Financial finding type.
  • C. Use Amazon Macie to run a job on the S3 buckets that contain the affected data. Filter the findings by using the SensitiveData:S3Object/Personal finding type.
  • D. Use Amazon Athena to run a job on the S3 buckets that contain the affected data. Filter the findings by using the SensitiveData:S3Object/Financial finding type.
#82 (Accuracy: 92% / 8 votes)
An ecommerce website uses an AWS Lambda function and an Amazon RDS for MySQL database for an order fulfillment service. The service needs to return order confirmation immediately.

During a marketing campaign that caused an increase in the number of orders, the website's operations team noticed errors for “too many connections” from Amazon RDS. However, the RDS DB cluster metrics are healthy. CPU and memory capacity are still available.

What should a developer do to resolve the errors?
  • A. Initialize the database connection outside the handler function. Increase the max_user_connections value on the parameter group of the DB cluster. Restart the DB cluster.
  • B. Initialize the database connection outside the handler function. Use RDS Proxy instead of connecting directly to the DB cluster.
  • C. Use Amazon Simple Queue Service (Amazon SQS) FIFO queues to queue the orders. Ingest the orders into the database. Set the Lambda function's concurrency to a value that equals the number of available database connections.
  • D. Use Amazon Simple Queue Service (Amazon SQS) FIFO queues to queue the orders. Ingest the orders into the database. Set the Lambda function's concurrency to a value that is less than the number of available database connections.
#83 (Accuracy: 100% / 7 votes)
A developer is building an application that uses Amazon DynamoDB. The developer wants to retrieve multiple specific items from the database with a single API call.

Which DynamoDB API call will meet these requirements with the MINIMUM impact on the database?
  • A. BatchGetItem
  • B. GetItem
  • C. Scan
  • D. Query
#84 (Accuracy: 100% / 6 votes)
An e-commerce web application that shares session state on-premises is being migrated to AWS. The application must be fault tolerant, natively highly scalable, and any service interruption should not affect the user experience.

What is the best option to store the session state?
  • A. Store the session state in Amazon ElastiCache.
  • B. Store the session state in Amazon CloudFront.
  • C. Store the session state in Amazon S3.
  • D. Enable session stickiness using elastic load balancers.
#85 (Accuracy: 92% / 5 votes)
A developer has code that is stored in an Amazon S3 bucket. The code must be deployed as an AWS Lambda function across multiple accounts in the same AWS Region as the S3 bucket. An AWS CloudFormation template that runs for each account will deploy the Lambda function.

What is the MOST secure way to allow CloudFormation to access the Lambda code in the S3 bucket?
  • A. Grant the CloudFormation service role the S3 ListBucket and GetObject permissions. Add a bucket policy to Amazon S3 with the principal of “AWS”: [account numbers].
  • B. Grant the CloudFormation service role the S3 GetObject permission. Add a bucket policy to Amazon S3 with the principal of “*”.
  • C. Use a service-based link to grant the Lambda function the S3 ListBucket and GetObject permissions by explicitly adding the S3 bucket’s account number in the resource.
  • D. Use a service-based link to grant the Lambda function the S3 GetObject permission. Add a resource of “*” to allow access to the S3 bucket.
#86 (Accuracy: 100% / 2 votes)
A development team wants to immediately build and deploy an application whenever there is a change to the source code.

Which approaches could be used to trigger the deployment? (Choose two.)
  • A. Store the source code in an Amazon S3 bucket. Configure AWS CodePipeline to start whenever a file in the bucket changes.
  • B. Store the source code in an encrypted Amazon EBS volume. Configure AWS CodePipeline to start whenever a file in the volume changes.
  • C. Store the source code in an AWS CodeCommit repository. Configure AWS CodePipeline to start whenever a change is committed to the repository.
  • D. Store the source code in an Amazon S3 bucket. Configure AWS CodePipeline to start every 15 minutes.
  • E. Store the source code in an Amazon EC2 instance’s ephemeral storage. Configure the instance to start AWS CodePipeline whenever there are changes to the source code.
#87 (Accuracy: 100% / 1 votes)
A company has an application that is deployed on AWS Elastic Beanstalk. The application generates user-specific PDFs and stores the PDFs in an Amazon S3 bucket. The application then uses Amazon Simple Email Service (Amazon SES) to send the PDFs by email to subscribers.

Users no longer access the PDFs 90 days after the PDFs are generated. The S3 bucket is not versioned and contains many obsolete PDFs.

A developer must reduce the number of files in the S3 bucket by removing PDFs that are older than 90 days.

Which solution will meet this requirement with the LEAST development effort?
  • A. Update the application code. In the code, add a rule to scan all the objects in the S3 bucket every day and to delete objects after 90 days.
  • B. Create an AWS Lambda function. Program the Lambda function to scan all the objects in the S3 bucket every day and to delete objects after 90 days.
  • C. Create an S3 Lifecycle rule for the S3 bucket to expire objects after 90 days.
  • D. Partition the S3 objects with a // key prefix. Create an AWS Lambda function to remove objects that have prefixes that have reached the expiration date.
              
#88 (Accuracy: 100% / 5 votes)
A developer is creating an AWS Lambda function in VPC mode. An Amazon S3 event will invoke the Lambda function when an object is uploaded into an S3 bucket. The Lambda function will process the object and produce some analytic results that will be recorded into a file. Each processed object will also generate a log entry that will be recorded into a file.

Other Lambda functions, AWS services, and on-premises resources must have access to the result files and log file. Each log entry must also be appended to the same shared log file. The developer needs a solution that can share files and append results into an existing file.

Which solution should the developer use to meet these requirements?
  • A. Create an Amazon Elastic File System (Amazon EFS) file system. Mount the EFS file system in Lambda. Store the result files and log file in the mount point. Append the log entries to the log file.
  • B. Create an Amazon Elastic Block Store (Amazon EBS) Multi-Attach enabled volume. Attach the EBS volume to all Lambda functions. Update the Lambda function code to download the log file, append the log entries, and upload the modified log file to Amazon EBS.
  • C. Create a reference to the /tmp local directory. Store the result files and log file by using the directory reference. Append the log entry to the log file.
  • D. Create a reference to the /opt storage directory. Store the result files and log file by using the directory reference. Append the log entry to the log file.
#89 (Accuracy: 100% / 2 votes)
A developer is setting up the deployment of application stacks to new test environments by using the AWS Cloud Development Kit (AWS CDK). The application contains the code for several AWS Lambda functions that will be deployed as assets. Each Lambda function is defined by using the AWS CDK Lambda construct library.

The developer has already successfully deployed the application stacks to the alpha environment in the first account by using the AWS CDK CLI's cdk deploy command. The developer is preparing to deploy to the beta environment in a second account for the first time. The developer makes no significant changes to the CDK code between deployments, but the initial deployment in the second account is unsuccessful and returns a NoSuchBucket error.

Which command should the developer run before redeployment to resolve this error?
  • A. cdk synth
  • B. cdk bootstrap
  • C. cdk init
  • D. cdk destroy
#90 (Accuracy: 100% / 2 votes)
A company has a website that displays a daily newsletter. When a user visits the website, an AWS Lambda function processes the browser's request and queries the company's on-premises database to obtain the current newsletter. The newsletters are stored in English. The Lambda function uses the Amazon Translate TranslateText API operation to translate the newsletters, and the translation is displayed to the user.

Due to an increase in popularity, the website's response time has slowed. The database is overloaded. The company cannot change the database and needs a solution that improves the response time of the Lambda function.

Which solution meets these requirements?
  • A. Change to asynchronous Lambda function invocation.
  • B. Cache the translated newsletters in the Lambda/tmp directory.
  • C. Enable TranslateText API caching.
  • D. Change the Lambda function to use parallel processing.