Free DVA-001 – AWS Certified Developer Associate 2018 AWS-Certified-Developer-Associate Exam Practice Test

What type of block cipher does Amazon S3 offer for server side encryption?

• Triple DES
  
• Advanced Encryption Standard
  
• Blowfish
  
• RC5
  

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 filesParallel branchingWhich AWS service will meet these requirements?

• AWS CodePipeline
  
• Amazon S3
  
• AWS Code Build
  
• AWS CodeCommit
  

A nightly batch job loads 1 million new records into a DynamoDB table. The records are only needed for one hour, and the table needs to be empty by the next night's batch job.Which is the MOST efficient and cost-effective method to provide an empty table?

• Use DeleteItem using a ConditionExpression.
  
• Use BatchWriteItem to empty all of the rows.
  
• With a recursive function that scans and calls out DeleteItem.
  
• Create and then delete the table after the task has completed.
  

A developer is trying to monitor an application's status by running a cron job that returns 1 if the service is up and 0 if the service is down. The developer created code that uses an AWS CLI put-metric-alarm command to publish the custom metrics to Amazon CloudWatch and create an alarm However the developer is unable to create an alarm as the custom metrics do not appear m the CloudWatch console.What is causing this issue?

• Sending custom metrics using the CLI is not supported
  
• The developer needs to use the put-metric-data command.
  
• The developer must use a unified CloudWatch agent to publish custom metrics
  
• The code is not running on an Amazon EC2 instance
  

You have written an application that uses the Elastic Load Balancing service to spread traffic to several web servers. Your users complain that they are sometimes forced to login again in the middle of using your application, after they have already logged in. This is not behavior you have designed.What is a possible solution to prevent this happening?

• Use instance memory to save session state.
  
• Use instance storage to save session state.
  
• Use EBS to save session state
  
• Use ElastiCache to save session state.
  
• Use Glacier to save session slate.
  

A company uses a third-party tool to build, bundle, and package rts applications on-premises. and store them locally The company uses Amazon EC2 instances to run its front-end applications How can an application be deployed from the source control system onto the EC2 instances?

• Use AWS CodeDeploy and point it to the local storage to directly deploy a bundle m a zip. tar. or tar.gz format
  
• Upload the bundle to an Amazon S3 bucket and specify the S3 location when doing a deployment using AWS CodeDeploy
  
• Create a repository using AWS CodeCommit to automatically trigger a deployment to the EC2 instances
  
• Use AWS CodeBuild to automatically deploy the latest build to the latest EC2 instances
  

A developer is building an application. The application's front end is developed in JavaScript, and the data is stored in an Amazon DynamoDB table During testing, the application returns an HTTP 5xx error from the strongly consistent reads to the DynamoDB table; 'Internal server error (Service: AmazonDynamoDBv2. Status Code: 500; Error Code; InternalServerError).'Which actions should the developer take to mitigate this error? (Select TWO )

• Avoid strongly consistent reads
  
• Use DynamoDB Accelerator (DAX)
  
• Increase read/write capacity of DynamoDB to meet the peak load.
  
• Retry the failed read requests with exponential backoff
  
• Configure DynamoDB auto scaling
  

A Developer is creating an application that needs to locate the public IPv4 address of the Amazon EC2 instance on which it runs. How can the application locate this information?

• Get the instance metadata by retrieving http://169.254.169.254/latest/metadata/.
  
• Get the instance user data by retrieving http://169.254.169.254/latest/userdata/.
  
• Get the application to run IFCONFIG to get the public IP address.
  
• Get the application to run IPCONFIG to get the public IP address.
  

A Developer decides lo store highly secure data in Amazon S3 and wants to implement server-side encryption (SSF) with granular control of who can access the master key Company policy requires that the master key be created, rotated, and disabled easily when needed, all for security reasons.Which solution should be used to moot these requirements?

• SSE with Amazon S3 managed keys (SSE-S3)
  
• SSFE with AWS KMS managed keys (SSE KMS)
  
• SSE with AWS Secrets Manager
  
• SSE with customer provided encryption keys
  

A startup s photo-sharing site is deployed in a VPC. An ELB distributes web traffic across two subnets. ELB session stickiness is configured to use the AWS-generated session cookie, with a session TTL of 5 minutes. The webserver Auto Scaling Group is configured as: min-size=4, max-size=4.The startups preparing for a public launch, by running load-testing software installed on a single EC2 instance running in us-west-2a. After 60 minutes of load-testing, the webserver logs show:Which recommendations can help ensure load-testing HTTP requests are evenly distributed across the four webservers? Choose 2 answers

• Launch and run the load-tester EC2 instance from us-east-1 instead.
  
• Re-configure the load-testing software to re-resolve DNS for each web request.
  
• Use a 3rd-party load-testing service which offers globally-distributed test clients.
  
• Configure ELB and Auto Scaling to distribute across us-west-2a and us-west-2c.
  
• Configure ELB session stickiness to use the app-specific session cookie.