AWS-Developer Real Braindumps, AWS-Developer Test Discount Voucher

AWS-Developer Real Braindumps, AWS-Developer Test Discount Voucher


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The AWS Certified Developer - Associate exam covers a wide range of topics including AWS core services, AWS developer tools, security, deployment, and troubleshooting. AWS-Developer Exam is designed to test the candidate's ability to design and develop scalable, fault-tolerant, and highly available applications on the AWS platform using various programming languages such as Java, Python, and Node.js.

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Amazon AWS Certified Developer Associate Exam (DVA-C02) Sample Questions (Q273-Q278):

NEW QUESTION # 273

An e-commerce site allows returning users to log in to display customized web pages. The workflow is shown in the image below:


An application is running on EC2 instances. Amazon RDS is used for the database that stores user accounts and preferences. The website freezes or is slow to load while waiting for the login step to complete. The remaining components of the site are well-optimized.

Which of the following techniques will resolve this issue? (Select Two.)

  • A. Batch login requests from hundreds of users together as a single read request to the database.
  • B. Call the database asynchronously so the code can continue executing.
  • C. Implement the user login page as an asynchronous Lambda function.
  • D. Use Amazon ElastiCache for MemCached to cache user data.
  • E. Use Amazon Application Load Balancer to load balance the traffic to the website.

Answer: B,D


NEW QUESTION # 274

A Developer has been asked to build a real-time dashboard web application to visualize the key prefixes and storage size of objects in Amazon S3 buckets. Amazon DynamoDB will be used to store the Amazon S3 metadata.

What is the optimal and MOST cost-effective design to ensure that the real-time dashboard is kept up to date with the state of the objects in the Amazon S3 buckets?

  • A. Create a new Amazon EMR cluster to get all the metadata about Amazon S3 objects; persist the metadata into DynamoDB. Have the web application poll the DynamoDB table to reflect this change.
  • B. Run a cron job within an Amazon EC2 instance to list all objects within Amazon S3 and persist the metadata into DynamoDB. Have the web application poll the DynamoDB table to reflect this change.
  • C. Use Amazon S3 Event Notification backed by a Lambda function to persist the metadata into DynamoDB. Have the web application poll the DynamoDB table to reflect this change.
  • D. Use an Amazon CloudWatch event backed by an AWS Lambda function. Issue an Amazon S3 API call to get a list of all Amazon S3 objects and persist the metadata within DynamoDB. Have the web application poll the DynamoDB table to reflect this change.

Answer: C

Explanation:

Cloudwatch notifications are at best every minute at extra cost. Lambda off an S3 notification will provide real-time data and lambda is the most cost effective processing method.


NEW QUESTION # 275

What does an Amazon SQS delay queue accomplish?

  • A. The consumer can poll the queue for a configurable amount of time before retrieving a message.
  • B. Messages are hidden for a configurable amount of time after they are consumed from the queue.
  • C. Message cannot be deleted for a configurable amount of time after they are consumed from the queue.
  • D. Messages are hidden for a configurable amount of time when they are first added to the queue.

Answer: D

Explanation:

Reference:

https://docs.aws.amazon.com/AWSSimpleQueueService/latest/SQSDeveloperGuide/sqs-delayqueues.html


NEW QUESTION # 276

A developer is building a serverless application by using AWS Serverless Application Model (AWS SAM) on multiple AWS Lambda functions.

When the application is deployed, the developer wants to shift 10% of the traffic to the new deployment of the application for the first 10 minutes after deployment. If there are no issues, all traffic must switch over to the new version.

Which change to the AWS SAM template will meet these requirements?

  • A. Set the Deployment Preference Type to CanaryIOPercentIOMinutes. Set the PreTraffic and PostTraffic properties to the Lambda alias.
  • B. Set the Deployment Preference Type to Canary10Percent10Minutes. Set the AutoPublishAlias property to the Lambda alias.
  • C. Set the Deployment Preference Type to LinearlOPercentEveryIOMinutes. Set PreTraffic and Post Traffic properties to the Lambda alias.
  • D. Set the Deployment Preference Type to LinearlOPercentEvery10Minutes. Set AutoPubIishAIias property to the Lambda alias.

Answer: B

Explanation:

The AWS Serverless Application Model (AWS SAM) comes built-in with CodeDeploy to provide gradual AWS Lambda deployments1. The DeploymentPreference property in AWS SAM allows you to specify the type of deployment that you want. The Canary10Percent10Minutes option means that 10 percent of your customer traffic is immediately shifted to your new version. After 10 minutes, all traffic is shifted to the new version1. The AutoPublishAlias property in AWS SAM allows AWS SAM to automatically create an alias that points to the updated version of the Lambda function1. Therefore, option A is correct.


NEW QUESTION # 277

A company has an internal website that gives users the ability to access contract Idata that is stored in an Amazon RDS DB instance The number of contracts has increased and several users have reported slow retrieval of the contract data The company wants to set up a cache to improve the latency A developer must create a solution that ensures data resiliency The data must be encrypted and must be partitioned by department Which solution will meet these requirements?

  • A. Amazon ElastiCache for Redis with cluster mode disabled
  • B. Amazon ElastiCache for Memcached with cluster mode enabled
  • C. Amazon ElastiCache for Redis with cluster mode enabled
  • D. Amazon ElastiCache for Memcached with cluster mode disabled

Answer: A


NEW QUESTION # 278

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