AWS Certified Developer - Associate

• #61

  What is the format of structured notification messages sent by Amazon SNS?

  • AAn XML object containing Messageld, UnsubscribeURL, Subject, Message and other values.
  • BAn JSON object containing Messageld, DuplicateFlag, Message and other values.
  • CAn XML object containing Messageld, DuplicateFlag, Message and other values.
  • DAn JSON object containing Messageld, unsubscribeURL, Subject, Message and other values.
  解答を表示
• #62

  A company is developing a serverless ecommerce web application. The application needs to make coordinated, all-or-nothing changes to multiple items in the company's inventory table in Amazon DynamoDB. Which solution will meet these requirements?

  • AEnable transactions for the DynamoDB table. Use the BatchWriteItem operation to update the items.
  • BUse the TransactWriteitems operation to group the changes. Update the items in the table.
  • CSet up a FIFO queue using Amazon SQS. Group the changes in the queue. Update the table based on the grouped changes.
  • DCreate a transaction table in an Amazon Aurora DB cluster to manage the transactions. Write a backend process to sync the Aurora DB table and the DynamoDB table.
  解答を表示
• #63

  A Developer is writing a Linux-based application to run on AWS Elastic Beanstalk. Application requirements state that the application must maintain full capacity during updates while minimizing cost. Which type of Elastic Beanstalk deployment policy should the Developer specify for the environment?

  • AImmutable.
  • BRolling.
  • CAll at Once.
  • DRolling with additional batch.
  解答を表示
• #64

  A company is building a compute-intensive application that will run on a fleet of Amazon EC2 instances. The application uses attached Amazon EBS disks for storing data. The application will process sensitive information and all the data must be encrypted. What should a developer do to ensure the data is encrypted on disk without impacting performance?

  • AConfigure the Amazon EC2 instance fleet to use encrypted EBS volumes for storing data.
  • BAdd logic to write all data to an encrypted Amazon S3 bucket.
  • CAdd a custom encryption algorithm to the application that will encrypt and decrypt all data.
  • DCreate a new Amazon Machine Image (AMI) with an encrypted root volume and store the data to ephemeral disks.
  解答を表示
• #65

  When using a large Scan operation in DynamoDB, what technique can be used to minimize the impact of a scan on a table's provisioned throughput?

  • ASet a smaller page size for the scan.
  • BUse parallel scans.
  • CDefine a range index on the table.
  • DPrewarm the table by updating all items.
  解答を表示
• #66

  A company needs to distribute firmware updates to its customers around the world. Which service will allow easy and secure control of the access to the downloads at the lowest cost?

  • AUse Amazon CloudFront with signed URLs for Amazon S3.
  • BCreate a dedicated Amazon CloudFront Distribution for each customer.
  • CUse Amazon CloudFront with AWS Lambda@Edge.
  • DUse Amazon API Gateway and AWS Lambda to control access to an S3 bucket.
  解答を表示
• #67

  In DynamoDB, what type of HTTP response codes indicate that a problem was found with the client request sent to the service?

  • A5xx HTTP response code.
  • B200 HTTP response code.
  • C306 HTTP response code.
  • D4xx HTTP response code.
  解答を表示
• #68

  A gaming company is developing a mobile game application for iOS® and Android® platforms. This mobile game securely stores user data locally on the device. The company wants to allow users to use multiple device for the game, which requires user data synchronization across device.Which service should be used to synchronize user data across devices without the need to create a backend application?

  • AAWS Lambda.
  • BAmazon S3.
  • CAmazon DynamoDB.
  • DAmazon Cognito.
  解答を表示
• #69

  A Developer is leveraging a Border Gateway Protocol (BGP)-based AWS VPN connection to connect from on-premises to Amazon EC2 instances in the Developer's account. The Developer is able to access an EC2 instance in subnet A, but is unable to access an EC2 instance in subnet B in the same VPC. Which logs can the Developer use to verify whether the traffic is reaching subnet B?

  • AVPN logs.
  • BBGP logs
  • CVPC Flow Logs.
  • DAWS CloudTrail logs.
  解答を表示
• #70

  The upload of a 15 GB object to Amazon S3 fails. The error message reads: Your proposed upload exceeds the maximum allowed object size.. What technique will allow the Developer to upload this object?

  • AUpload the object using the multi-part upload API.
  • BUpload the object over an AWS Direct Connect connection.
  • CContact AWS Support to increase the object size limit.
  • DUpload the object to another AWS region.
  解答を表示
• #712 つ選択

  A company is migrating from a monolithic architecture to a microservices-based architecture. The Developers need to refactor the application so that the many microservices can asynchronously communicate with each other without impacting performance. Use of which managed AWS services will enable asynchronous message passing? (Choose TWO)

  • AAmazon SQS.
  • BAmazon Cognito.
  • CAmazon Kinesis.
  • DAmazon SNS.
  • EAmazon ElastiCache.
  解答を表示
• #72

  What happens, by default, when one of the resources in a CloudFormation stack cannot be created?

  • APreviously-created resources are kept but the stack creation terminates.
  • BPreviously-created resources are deleted and the stack creation terminates.
  • CThe stack creation continues, and the final results indicate which steps failed.
  • DCloudFormation templates are parsed in advance so stack creation is guaranteed to succeed.
  解答を表示
• #73

  A company has an AWS CloudFormation template that is stored as a single file. The template is able to launch and create a full infrastructure stack. Which best practice would increase the maintainability of the template?

  • AUse nested stacks for common template patterns.
  • BEmbed credentials to prevent typos.
  • CRemove mappings to decrease the number of variables.
  • DUse AWS::Include to reference publicly-hosted template files.
  解答を表示
• #74

  A Developer created a dashboard for an application using Amazon API Gateway, Amazon S3, AWS Lambda, and Amazon RDS. The Developer needs an authentication mechanism allowing a user to sign in and view the dashboard. It must be accessible from mobile applications, desktops, and tablets, and must remember user preferences across platforms. Which AWS service should the Developer use to support this authentication scenario?

  • AAWS KMS.
  • BAmazon Cognito.
  • CAWS Directory Service.
  • DAmazon IAM.
  解答を表示
• #75

  A company wants to migrate its web application to AWS and leverage Auto Scaling to handle peak workloads. The Solutions Architect determined that the best metric for an Auto Scaling event is the number of concurrent users. Based on this information, what should the Developer use to autoscale based on concurrent users?

  • AAn Amazon SNS topic to be triggered when a concurrent user threshold is met.
  • BAn Amazon Cloudwatch NetworkIn metric.
  • CAmazon CloudFront to leverage AWS Edge Locations.
  • DA Custom Amazon CloudWatch metric for concurrent users.
  解答を表示
• #764 つ選択

  In AWS, which security aspects are the customer's responsibility? (Choose FOUR)

  • ALife-cycle management of IAM credentials.
  • BDecommissioning storage devices.
  • CSecurity Group and ACL (Access Control List) settings.
  • DEncryption of EBS (Elastic Block Storage) volumes.
  • EControlling physical access to compute resources.
  • FPatch management on the EC2 instance's operating system.
  解答を表示
• #77

  A company is launching an ecommerce website and will host the static data in Amazon S3. The company expects approximately 1,000 transactions per second (TPS) for GET and PUT requests in total. Logging must be enabled to track all requests and must be retained for auditing purposes. What is the MOST cost-effective solution?

  • AEnable AWS CloudTrail logging for the S3 bucket-level action and create a lifecycle policy to move the data from the log bucket to Amazon S3 Glacier in 90 days.
  • BEnable S3 server access logging and create a lifecycle policy to expire the data in 90 days.
  • CEnable AWS CloudTrail logging for the S3 bucket-level action and create a lifecycle policy to expire the data in 90 days.
  • DEnable S3 server access logging and create a lifecycle policy to move the data to Amazon S3 Glacier in 90 days.
  解答を表示
• #78

  Which of the following is an example of a good DynamoDB hash key schema for provisioned throughput efficiency?

  • AUser ID, where the application has many different users.
  • BStatus Code where most status codes are the same.
  • CDevice ID, where one is by far more popular than all the others.
  • DGame Type, where there are three possible game types.
  解答を表示
• #79

  A company is migrating a single-server, on-premises web application to AWS. The company intends to use multiple servers behind an Elastic Load Balancer (ELB) to balance the load, and will also store session data in memory on the web server. The company does not want to lose that session data if a server fails or goes offline, and it wants to minimize user's downtime. Where should the company move session data to MOST effectively reduce downtime and make users' session data more fault tolerant?

  • AAn Amazon ElastiCache for Redis cluster.
  • BA second Amazon EBS volume.
  • CThe web server's primary disk.
  • DAn Amazon EC2 instance dedicated to session data.
  解答を表示
• #80

  A developer needs to modify an application architecture to meet new functional requirements. Application data is stored in Amazon DynamoDB and processed for analysis in a nightly batch. The system analysts do not want to wait unit the next day to view the processed data and have asked to have it available in near-real time. Which application architect pattern would enables the data to be processed as it is received?

  • AEvent driven.
  • BClient served driven.
  • CFan-out driven.
  • DSchedule driven.
  解答を表示

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