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[General] AWS-Developer Reliable Test Answers | Reliable AWS-Developer Exam Practice

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【General】 AWS-Developer Reliable Test Answers | Reliable AWS-Developer Exam Practice

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Amazon AWS Certified Developer Associate Exam (DVA-C02) Sample Questions (Q256-Q261):NEW QUESTION # 256
A company runs an ecommerce application on AWS. The application stores data in an Amazon Aurora database.
A developer is adding a caching layer to the application. The caching strategy must ensure that the application always uses the most recent value for each data item.
Which caching strategy will meet these requirements?
  • A. Implement a read-through strategy for every item that is loaded.
  • B. Implement a TTL strategy for every item that is saved in the cache.
  • C. Implement a lazy loading strategy for every item that is loaded.
  • D. Implement a write-through strategy for every item that is created and updated.
Answer: D

NEW QUESTION # 257
In regards to Amazon SQS how can you secure the messages in your queues?
  • A. Through your IAM access keys
  • B. You can't
  • C. Don't use root access
  • D. Amazon SQS uses either your Access Key ID or an X.509 certificate to authenticate your identity
Answer: D
Explanation:
Authentication mechanisms are provided to ensure that messages stored in Amazon SQS queues are secured against unauthorized access. Only the AWS account owners can access the queues they create. Amazon SQS uses proven cryptographic methods to authenticate your identity, either through the use of your Access Key ID and request signature, or through the use of an X.509 certificate.
https://aws.amazon.com/sqs/faqs/

NEW QUESTION # 258
A Developer is testing a Docker-based application that uses the AWS SDK to interact with Amazon
DynamoDB. In the local development environment, the application has used IAM access keys. The application is now ready for deployment onto an ECS cluster.
How should the application authenticate with AWS services in production?
  • A. Configure an ECS task IAM role for the application to use
  • B. Configure AWS access key/secret access key environment variables with new credentials
  • C. Configure the credentials file with a new access key/secret access key
  • D. Refactor the application to call AWS STS AssumeRole based on an instance role
Answer: A
Explanation:
https://docs.aws.amazon.com/Amaz ... 20ECS%20Task%20Role,Task%20Role%20trust%20relationship%20policy.

NEW QUESTION # 259
In regard to AWS CloudFormation, what is a stack?
  • A. The set of AWS templates that are created and managed as a single unit
  • B. The set of AWS templates that are created and managed as a template
  • C. The set of AWS resources that are created and managed as a template
  • D. The set of AWS resources that are created and managed as a single unit
Answer: D
Explanation:
A stack is the set of AWS resources that are created and managed as a single unit when AWS CloudFormation initiates a template.
Reference: http://docs.aws.amazon.com/AWSCl ... /concept-stack.html

NEW QUESTION # 260
A developer is using Amazon DynamoDB to store application data. The developer wants to further improve application performance by reducing response times for read and write operations.
Which DynamoDB feature should be used to meet these requirements?
  • A. Amazon DynamoDB transactions
  • B. Amazon DynamoDB global tables
  • C. Amazon DynamoDB Accelerator
  • D. Amazon DynamoDB Streams
Answer: A
Explanation:
Explanation/Reference: https://docs.aws.amazon.com/amazondynamodb/latest/developerguide/ HowItWorks.ReadWriteCapacityMode.html

NEW QUESTION # 261
......
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