AWS Certified Developer - Associate

• #321

  A Developer writes an AWS Lambda function and uploads the code in a .ZIP file to Amazon S3. The Developer makes changes to the code and uploads a new .ZIP file to Amazon S3. However, Lambda executes the earlier code. How can the Developer fix this in the LEAST disruptive way?

  • ACreate another Lambda function and specify the new .ZIP file.
  • BCall the update-function-code API.
  • CRemove the earlier .ZIP file first, then add the new .ZIP file.
  • DCall the create-alias API.
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• #322

  A static website is hosted in an Amazon S3 bucket. Several HTML pages on the site use JavaScript to download images from another Amazon S3 bucket. These images are not displayed when users browse the site. What is the possible cause for the issue?

  • AThe referenced Amazon S3 bucket is in another region.
  • BThe images must be stored in the same Amazon S3 bucket.
  • CPort 80 must be opened on the security group in which the Amazon S3 bucket is located.
  • DCross Origin Resource Sharing must be enabled on the Amazon S3 bucket.
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• #323Pilih 2

  Which of the following are good use cases for how Amazon ElastiCache can help an application? (Select TWO)

  • AImprove the performance of S3 PUT operations.
  • BImprove the latency of deployments performed by AWS CodeDeploy.
  • CImprove latency and throughput for read-heavy application workloads.
  • DReduce the time required to merge AWS CodeCommit branches.
  • EImprove performance of compute-intensive applications.
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• #324

  An application is expected to process many files. Each file takes four minutes to process each AWS Lambda invocation. The Lambda function does not return any important data. What is the fastest way to process all the files?

  • AFirst split the files to make them smaller, then process with synchronous RequestResponse Lambda invocations.
  • BMake synchronous RequestResponse Lambda invocations and process the files one by one.
  • CMake asynchronous Event Lambda invocations and process the files in parallel.
  • DFirst join all the files, then process it all at once with an asynchronous Event Lambda invocation.
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• #325

  A Developer is writing an imaging micro service on AWS Lambda. The service is dependent on several libraries that are not available in the Lambda runtime environment. Which strategy should the Developer follow to create the Lambda deployment package?

  • ACreate a ZIP file with the source code and all dependent libraries.
  • BCreate a ZIP file with the source code and a script that installs the dependent libraries at runtime.
  • CCreate a ZIP file with the source code. Stage the dependent libraries on an Amazon S3 bucket indicated by the Lambda environment variable LD_LIBRARY_PATH.
  • DCreate a ZIP file with the source code and a buildspec.yaml file that installs the dependent libraries on AWS Lambda.
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• #326

  A Developer is trying to deploy a serverless application using AWS CodeDeploy. The application was updated and needs to be redeployed. What file does the Developer need to update to push that change through CodeDeploy?

  • Adockerrun.aws.json.
  • Bbuildspec.yml.
  • Cappspec.yml.
  • Debextensions.config.
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• #327

  The Developer for a retail company must integrate a fraud detection solution into the order processing solution. The fraud detection solution takes between ten and thirty minutes to verify an order. At peak, the web site can receive one hundred orders per minute. What is the most scalable method to add the fraud detection solution to the order processing pipeline?

  • AAdd all new orders to an Amazon SQS queue. Configure a fleet of 10 EC2 instances spanning multiple AZs with the fraud detection solution installed on them to pull orders from this queue. Update the order with a pass or fails status.
  • BAdd all new orders to an SQS queue. Configure an Auto Scaling group that uses the queue depth metric as its unit of scale to launch a dynamically-sized fleet of EC2 instances spanning multiple AZs with the fraud detection solution installed on them to pull orders from this queue. Update the order with a pass or fails status.
  • CAdd all new orders to an Amazon Kinesis Stream. Subscribe a Lambda function to automatically read batches of records from the Kinesis Stream. The Lambda function includes the fraud detection software and will update the order with a pass or fail status.
  • DWrite all new orders to Amazon DynamoDB. Configure DynamoDB Streams to include all new orders. Subscribe a Lambda function to automatically read batches of records from the Kinesis Stream. The Lambda function includes the fraud detection software and will update the order with a pass or fail status.
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• #328

  A company needs a version control system for collaborative software development. Features of the system must include the following: Support for batches of changes across multiple files. Parallel branching Version tracking. Which AWS service will meet these requirements?

  • AAWS CodePipeline.
  • BAmazon S3.
  • CAWS Code Build.
  • DAWS CodeCommit.
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• #329

  Which code snippet below returns the URL of a load balanced web site created in CloudFormation with an AWS::ElasticLoadBalancing::LoadBalancer resource name ElasticLoad Balancer?

  • A"Fn::Join":[ "".["http://", {Fn::GetAtt": [ "ElasticLoadBalancer","DNSName"]}]].
  • B"Fn::Join":[ "".["http://", {Fn::GetAtt": [ "ElasticLoadBalancer","Url"]}]].
  • C"Fn::Join":[ "".["http://", {"Ref : "ElasticLoadBalancerUrl"}]].
  • D"Fn::Join":[ "".["http://", {"Ref : "ElasticLoadBalancer","DNSName"}]].
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• #330

  A Developer will be using the AWS CLI on a local development server to manage AWS services. What can be done to ensure that the CLI uses the Developer's IAM permissions when making commands?

  • ASpecify the Developer's IAM access key ID and secret access key as parameters for each CLI command.
  • BRun the aws configure CLI command, and provide the Developer's IAM access key ID and secret access key.
  • CSpecify the Developer's IAM user name and password as parameters for each CLI command.
  • DUse the Developer's IAM role when making the CLI command.
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• #331

  An IAM role is attached to an Amazon EC2 instance that explicitly denies access to all Amazon S3 API actions. The EC2 instance credentials file specifies the IAM access key and secret access key, which allow full administrative access. Given that multiple modes of IAM access are present for this EC2 instance, which of the following is correct?

  • AThe EC2 instance will only be able to list the S3 buckets.
  • BThe EC2 instance will only be able to list the contents of one S3 bucket at a time.
  • CThe EC2 instance will be able to perform all actions on any S3 bucket.
  • DThe EC2 instance will not be able to perform any S3 action on any S3 bucket.
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• #332

  You are inserting 1000 new items every second in a DynamoDB table. Once an hour these items are analyzed and then are no longer needed. You need to minimize provisioned throughput, storage, and API calls. Given these requirements, what is the most efficient way to manage these Items after the analysis?

  • ARetain the items in a single table.
  • BDelete items individually over a 24 hour period.
  • CDelete the table and create a new table per hour.
  • DCreate a new table per hour.
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• #333

  A development team uses AWS Elastic Beanstalk for application deployment. The team has configured the application version lifecycle policy to limit the number of application versions to 25. However, even with the lifecycle policy, the source bundle is deleted from the Amazon S3 source bucket. What should a developer do in the Elastic Beanstalk application version lifecycle settings to retain the source code in the S3 bucket?

  • AChange the Set the application versions limit by total count setting to zero.
  • BDisable the Lifecycle policy setting.
  • CChange the Set the application version limit by age setting to zero.
  • DSet Retention to Retain source bundle in S3.
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• #334

  A stock market monitoring application uses Amazon Kinesis for data ingestion. During simulated tests of peak data rates, the Kinesis stream cannot keep up with the incoming data. What step will allow Kinesis to accommodate the traffic during peak hours?

  • AInstall the Kinesis Producer Library (KPL) for ingesting data into the stream.
  • BReduce the data retention period to allow for more data ingestion using DecreaseStreamRetentionPeriod.
  • CIncrease the shard count of the stream using UpdateShardCount.
  • DIngest multiple records into the stream in a single call using PutRecords.
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• #335

  For a deployment using AWS CodeDeploy, what is the run order of the hooks for in-place deployments?

  • ABefore Install -> Application Stop -> Application Start -> After Install.
  • BApplication Stop -> Before Install -> After Install -> Application Start.
  • CBefore Install -> Application Stop -> Validate Service -> Application Start.
  • DApplication Stop -> Before Install -> Validate Service -> Application Start.
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• #336

  An application stores images in an S3 bucket. Amazon S3 event notifications are used to trigger a Lambda function that resizes the images. Processing each image takes less than a second. How will AWS Lambda handle the additional traffic?

  • ALambda will scale out to execute the requests concurrently.
  • BLambda will handle the requests sequentially in the order received.
  • CLambda will process multiple images in a single execution.
  • DLambda will add more compute to each execution to reduce processing time.
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• #337Pilih 2

  A developer must extend an existing application that is based on the AWS Serverless 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)

  • Asam init.
  • Bsam validate.
  • Csam build.
  • Dsam deploy.
  • Esam publish.
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• #338

  You are providing AWS consulting services for a company developing a new mobile application that will be leveraging Amazon SNS Mobile Push for push notifications. In order to send direct notification messages to individual devices each device registration identifier or token needs to be registered with SNS; however the developers are not sure of the best way to do this. You advise them to:

  • ABulk upload the device tokens contained in a CSV file via the AWS Management Console.
  • BLet the push notification service (e.g. Amazon Device Messaging) handle the registration.
  • CImplement a token vending service to handle the registration.
  • DCall the CreatePlatformEndPoint API function to register multiple device tokens.
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• #339

  A company has implemented AWS CodeDeploy as part of its cloud native CI/CD stack. The company enables automatic rollbacks while deploying a new version of a popular web application from in-place to Amazon EC2. What occurs if the deployment of the new version fails due to code regression?

  • AThe last known good deployment is automatically restored using the snapshot stored in Amazon S3.
  • BCodeDeploy switches the Amazon Route 53 alias records back to the known good green deployment and terminates the failed blue deployment.
  • CA new deployment of the last known version of the application is deployed with a new deployment ID.
  • DAWS CodePipeline promotes the most recent deployment with a SUCCEEDED status to production.
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• #340

  A company is running a Docker application on Amazon ECS. The application must scale based on user load in the last 15 seconds. How should a Developer instrument the code so that the requirement can be met?

  • ACreate a high-resolution custom Amazon CloudWatch metric for user activity data, then publish data every 30 seconds.
  • BCreate a high-resolution custom Amazon CloudWatch metric for user activity data, then publish data every 5 seconds.
  • CCreate a standard-resolution custom Amazon CloudWatch metric for user activity data, then publish data every 30 seconds.
  • DCreate a standard-resolution custom Amazon CloudWatch metric for user activity data, then publish data every 5 seconds.
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