AWS Certified Developer - Associate

• #261

  A Developer wants to debug an application by searching and filtering log data. The application logs are stored in Amazon CloudWatch Logs. The Developer creates a new metric filter to count exceptions in the application logs. However, no results are returned from the logs. What is the reason that no filtered results are being returned?

  • AA setup of the Amazon CloudWatch interface VPC endpoint is required for filtering the CloudWatch Logs in the VPC.
  • BCloudWatch Logs only publishes metric data for events that happen after the filter is created.
  • CThe log group for CloudWatch Logs should be first streamed to Amazon Elasticsearch Service before metric filtering returns the results.
  • DMetric data points for logs groups can be filtered only after they are exported to an Amazon S3 bucket.
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• #262

  A Lambda function is packaged for deployment to multiple environments, including development, test, production, etc. Each environment has unique set of resources such as databases, etc. How can the Lambda function use the resources for the current environment?

  • AApply tags to the Lambda functions.
  • BHardcore resources in the source code.
  • CUse environment variables for the Lambda functions.
  • DUse separate function for development and production.
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• #263

  What is required to trace Lambda-based applications with AWS X-Ray?

  • ASend logs from the Lambda application to an S3 bucket; trigger a Lambda function from the bucket to send data to AWS X-Ray.
  • BTrigger a Lambda function from the application logs in Amazon CloudWatch to submit tracing data to AWS X-Ray.
  • CUse an IAM execution role to give the Lambda function permissions and enable tracing.
  • DUpdate and add AWS X-Ray daemon code to relevant parts of the Lambda function to set up the trace.
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• #264

  An application is running on an EC2 instance. The Developer wants to store an application metric in Amazon CloudWatch. What is the best practice for implementing this requirement?

  • AUse the PUT Object API call to send data to an S3 bucket. Use an event notification to invoke a Lambda function to publish data to CloudWatch.
  • BPublish the metric data to an Amazon Kinesis Stream using a PutRecord API call. Subscribe a Lambda function that publishes data to CloudWatch.
  • CUse the CloudWatch PutMetricData API call to submit a custom metric to CloudWatch. Provide the required credentials to enable the API call.
  • DUse the CloudWatch PutMetricData API call to submit a custom metric to CloudWatch. Launch the EC2 instance with the required IAM role to enable the API call.
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• #265

  A Developer is creating an AWS Lambda function to process a stream of data from an Amazon Kinesis Data Stream. When the Lambda function parses the data and encounters a missing field, it exits the function with an error. The function is generating duplicate records from the Kinesis stream. When the Developer looks at the stream output without the Lambda function, there are no duplicate records. What is the reason for the duplicates?

  • AThe Lambda function did not advance the Kinesis stream pointer to the next record after the error.
  • BThe Lambda event source used asynchronous invocation, resulting in duplicate records.
  • CThe Lambda function did not handle the error, and the Lambda service attempted to reprocess the data.
  • DThe Lambda function is not keeping up with the amount of data coming from the stream.
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• #266

  A Developer must trigger an AWS Lambda function based on the item lifecycle activity in an Amazon DynamoDB table. How can the Developer create the solution?

  • AEnable a DynamoDB stream that publishes an Amazon SNS message. Trigger the Lambda function synchronously from the SNS message.
  • BEnable a DynamoDB stream that publishes an SNS message. Trigger the Lambda function asynchronously from the SNS message.
  • CEnable a DynamoDB stream, and trigger the Lambda function synchronously from the stream.
  • DEnable a DynamoDB stream, and trigger the Lambda function asynchronously from the stream.
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• #267

  When a Developer tries to run an AWS CodeBuild project, it raises an error because the length of all environment variables exceeds the limit for the combined maximum of characters. What is the recommended solution?

  • AAdd the export LC_ALL="en_US.utf8" command to the pre_build section to ensure POSIX localization.
  • BUse Amazon Cognito to store key-value pairs for large numbers of environment variables.
  • CUpdate the settings for the build project to use an Amazon S3 bucket for large numbers of environment variables.
  • DUse AWS Systems Manager Parameter Store to store large numbers of environment variables.
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• #268

  An application deployed on AWS Elastic Beanstalk experiences increased error rates during deployments of new application versions, resulting in service degradation for users. The Development team believes that this is because of the reduction in capacity during the deployment steps. The team would like to change the deployment policy configuration of the environment to an option that maintains full capacity during deployment while using the existing instances. Which deployment policy will meet these requirements while using the existing instances?

  • AAll at once.
  • BRolling.
  • CRolling with additional batch.
  • DImmutable.
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• #269

  A company is creating an application that will require users to access AWS services and allow them to reset their own passwords. Which of the following would allow the company to manage users and authorization while allowing users to reset their own passwords?

  • AAmazon Cognito identify pools and AWS STS.
  • BAmazon Cognito identity pools and AWS IAM.
  • CAmazon Cognito user pools and AWS KMS.
  • DAmazon Cognito user pools and identity pools.
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• #270

  A Developer is building a mobile application and needs any update to user profile data to be pushed to all devices accessing the specific identity. The Developer does not want to manage a back end to maintain the user profile data. What is the MOST efficient way for the Developer to achieve these requirements using Amazon Cognito?

  • AUse Cognito federated identities.
  • BUse a Cognito user pool.
  • CUse Cognito Sync.
  • DUse Cognito events.
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• #271

  A Developer needs to use AWS X-Ray to monitor an application that is deployed on EC2 instances. What steps have to be executed to perform the monitoring?

  • ADeploy the X-Ray SDK with the application and use X-Ray annotation.
  • BInstall the X-Ray daemon and instrument the application code.
  • CInstall the X-Ray daemon and configure it to forward data to Amazon CloudWatch Events.
  • DDeploy the X-Ray SDK with the application and instrument the application code.
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• #272

  An organization is storing large files in Amazon S3, and is writing a web application to display meta-data about the files to end-users. Based on the metadata a user selects an object to download. The organization needs a mechanism to index the files and provide single-digit millisecond latency retrieval for the metadata. What AWS service should be used to accomplish this?

  • AAmazon DynamoDB.
  • BAmazon EC2.
  • CAWS Lambda.
  • DAmazon RDS.
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• #2732টি বাছুন

  A supplier is writing a new RESTful API for customers to query the status of orders. The customers requested the following API endpoint http://www.supplierdomain.com/status/customerID. Which of the following application designs meet the requirements? (Select TWO)

  • AAmazon SQS; Amazon SNS.
  • BElastic Load Balancing; Amazon EC2.
  • CAmazon ElastiCache; Amazon Elacticsearch Service.
  • DAmazon API Gateway; AWS Lambda.
  • EAmazon S3; Amazon CloudFront.
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• #274

  An application is experiencing performance issues based on increased demand. This increased demand is on read-only historical records pulled from an Amazon RDS-hosted database with custom views and queries. A Developer must improve performance without changing the database structure. Which approach will improve performance and MINIMIZE management overhead?

  • ADeploy Amazon DynamoDB, move all the data, and point to DynamoDB.
  • BDeploy Amazon ElastiCache for Redis and cache the data for the application.
  • CDeploy Memcached on Amazon EC2 and cache the data for the application.
  • DDeploy Amazon DynamoDB Accelerator (DAX) on Amazon RDS to improve cache performance.
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• #275

  A Developer must encrypt a 100-GB object using AWS KMS. What is the BEST approach?

  • AMake an Encrypt API call to encrypt the plaintext data as ciphertext using a customer master key (CMK).
  • BMake an Encrypt API call to encrypt the plaintext data as ciphertext using a customer master key (CMK) with imported key material.
  • CMake an GenerateDataKey API call that returns a plaintext key and an encrypted copy of a data key. Use a plaintext key to encrypt the data.
  • DMake an GenerateDataKeyWithoutPlaintext API call that returns an encrypted copy of a data key. Use an encrypted key to encrypt the data.
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• #2762টি বাছুন

  A Developer is writing an application that will run on Amazon EC2 instances in an Auto Scaling group. The Developer wants to externalize session state to support the application. Which services will meet these needs? (Choose TWO)

  • AAmazon DynamoDB.
  • BAmazon Cognito.
  • CAmazon ElastiCache.
  • DAmazon EBS.
  • EAmazon SQS.
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• #277

  A Developer is working on an application that handles 10MB documents that contain highly-sensitive data. The application will use AWS KMS to perform clientside encryption. What steps must be followed?

  • AInvoke the Encrypt API passing the plaintext data that must be encrypted, then reference the customer managed key ARN in the KeyId parameter.
  • BInvoke the GenerateRandom API to get a data encryption key, then use the data encryption key to encrypt the data.
  • CInvoke the GenerateDataKey API to retrieve the encrypted version of the data encryption key to encrypt the data.
  • DInvoke the GenerateDataKey API to retrieve the plaintext version of the data encryption key to encrypt the data.
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• #278

  Your application is trying to upload a 6 GB file to Simple Storage Service and receive a Your proposed upload exceeds the maximum allowed object size. error message. What is a possible solution for this?

  • ANone, Simple Storage Service objects are limited to 5 GB.
  • BUse the multi-part upload API for this object.
  • CUse the large object upload API for this object.
  • DContact support to increase your object size limit.
  • EUpload to a different region.
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• #279

  A Developer is investigating an application's performance issues. The application consists of hundreds of microservices, and a single API call can potentially have a deep call stack. The Developer must isolate the component that is causing the issue. Which AWS service or feature should the Developer use to gather information about what is happening and isolate the fault?

  • AAWS X-Ray.
  • BVPC Flow Logs.
  • CAmazon GuardDuty.
  • DAmazon Macie.
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• #280

  A Developer wants to find a list of items in a global secondary index from an Amazon DynamoDB table. Which DynamoDB API call can the Developer use in order to consume the LEAST number of read capacity units?

  • AScan operation using eventually-consistent reads.
  • BQuery operation using strongly-consistent reads.
  • CQuery operation using eventually-consistent reads.
  • DScan operation using strongly-consistent reads.
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