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Amazon AWS Certified Developer - Associate Sample Questions (Q95-Q100):

NEW QUESTION # 95
A developer must analyze performance issues with production-distributed applications written as AWS Lambda functions. These distributed Lambda applications invoke other components that make up me applications. How should the developer identify and troubleshoot the root cause of the performance issues in production?

A. Add logging statements to the Lambda functions. then use Amazon CloudWatch to view the logs.
B. Use AWS X-Ray. then examine the segments and errors.
C. Run Amazon inspector agents and then analyze performance.
D. Use AWS CloudTrail and then examine the logs.

Answer: B

Explanation:
Explanation
This solution will meet the requirements by using AWS X-Ray to analyze and debug the performance issues with the distributed Lambda applications. AWS X-Ray is a service that collects data about requests that the applications serve, and provides tools to view, filter, and gain insights into that data. The developer can use AWS X-Ray to identify the root cause of the performance issues by examining the segments and errors that show the details of each request and the components that make up the applications. Option A is not optimal because it will use logging statements and Amazon CloudWatch, which may not provide enough information or visibility into the distributed applications. Option B is not optimal because it will use AWS CloudTrail, which is a service that records API calls and events for AWS services, not application performance data.
Option D is not optimal because it will use Amazon Inspector, which is a service that helps improve the security and compliance of applications on Amazon EC2 instances, not Lambda functions.
References: AWS X-Ray, Using AWS X-Ray with AWS Lambda

NEW QUESTION # 96
A developer is creating a service that uses an Amazon S3 bucket for image uploads. The service will use an AWS Lambda function to create a thumbnail of each image Each time an image is uploaded the service needs to send an email notification and create the thumbnail The developer needs to configure the image processing and email notifications setup.
Which solution will meet these requirements?

A. Create an Amazon Simple Notification Service (Amazon SNS) topic Configure S3 event notifications with a destination of the SNS topic Subscribe the Lambda function to the SNS topic Create an email notification subscription to the SNS topic
B. Create an Amazon Simple Queue Service (Amazon SQS) queue Configure S3 event notifications with a destination of the SQS queue Subscribe the Lambda function to the SQS queue Create an email notification subscription to the SQS queue.
C. Create an Amazon Simple Queue Service (Amazon SQS) queue. Send S3 event notifications to Amazon EventBridge. Create an EventBndge rule that runs the Lambda function when images are uploaded to the S3 bucket Create an EventBridge rule that sends notifications to the SQS queue Create an email notification subscription to the SQS queue
D. Create an Amazon Simple Notification Service (Amazon SNS) topic. Configure S3 event notifications with a destination of the SNS topic. Subscribe the Lambda function to the SNS topic. Create an Amazon Simple Queue Service (Amazon SQS) queue Subscribe the SQS queue to the SNS topic Create an email notification subscription to the SQS queue.

Answer: A

Explanation:
* SNS as a Fan-out Mechanism: SNS is perfect for triggering multiple actions from a single event (here, the image upload).
* Workflow:
* SNS Topic: Create an SNS topic that will be the central notification point.
* S3 Event Notification: Configure the S3 bucket to send 'Object Created' event notifications to the SNS topic.
* Lambda Subscription: Subscribe your thumbnail-creating Lambda function to the SNS topic.
* Email Subscription: Subscribe an email address to the SNS topic to trigger notifications.
References:
* S3 Event Notifications: https://docs.aws.amazon.com/AmazonS3/latest/userguide/EventNotifications.
html
* SNS Subscriptions: https://docs.aws.amazon.com/sns/latest/dg/SNSMobilePush.html

NEW QUESTION # 97
A company has an application that is hosted on Amazon EC2 instances The application stores objects in an Amazon S3 bucket and allows users to download objects from the S3 bucket A developer turns on S3 Block Public Access for the S3 bucket After this change, users report errors when they attempt to download objects The developer needs to implement a solution so that only users who are signed in to the application can access objects in the S3 bucket.
Which combination of steps will meet these requirements in the MOST secure way? (Select TWO.)

A. Modify the application to use the S3 GeneratePresignedUrl API call
B. Create an 1AM user with an appropriate policy. Store the access key ID and secret access key on the EC2 instances
C. Modify the application to use the S3 GetObject API call and to return the object handle to the user
D. Create an EC2 instance profile and role with an appropriate policy Associate the role with the EC2 instances
E. Modify the application to delegate requests to the S3 bucket.

Answer: A,D

Explanation:
* IAM Roles for EC2 (A): The most secure way to provide AWS permissions from EC2.
* Create a role with a policy allowing s3:GetObject on the specific bucket.
* Attach the role to an instance profile and associate that profile with your instances.
* Pre-signed URLs (C): Temporary, authenticated URLs for specific S3 actions.
* Modify the app to use the AWS SDK to call GeneratePresignedUrl.
* Embed these URLs when a user is properly logged in, allowing download access.
References:
* IAM Roles for EC2: https://docs.aws.amazon.com/IAM/latest/UserGuide/id_roles_use_switch-role-ec2.
html
* Generating Presigned URLs: https://docs.aws.amazon.com/AmazonS3/latest/userguide
/ShareObjectPreSignedURL.htm

NEW QUESTION # 98
A company uses an AWS Lambda function to transfer files from an Amazon S3 bucket to the company's SFTP server. The Lambda function connects to the SFTP server by using credentials such as username and password. The company uses Lambda environment variables to store these credentials.
A developer needs to implement encrypted username and password credentials.
Which solution will meet these requirements?

A. Remove the user credentials from the Lambda environment. Implement 1AM database authentication.
B. Move the user credentials from Lambda environment variables to AWS Systems Manager Parameter Store.
C. Move the user credentials from Lambda environment variables to AWS Key Management Service (AWS KMS).
D. Move the user credentials from the Lambda environment to an encrypted .txt file. Store the file in an S3 bucket.

Answer: B

NEW QUESTION # 99
A company is creating a new application that gives users the ability to upload and share short video files. The average size of the video files is 10 MB. After a user uploads a file, a message needs to be placed into an Amazon Simple Queue Service (Amazon SQS) queue so the file can be processed. The files need to be accessible for processing within 5 minutes.
Which solution will meet these requirements MOST cost-effectively?

A. Write the files to Amazon S3 Standard. Add the S3 location of the files to the SQS queue.
B. Write messages that contain the contents of the uploaded files to the SQS queue.
C. Write the files to an Amazon Elastic Block Store (Amazon EBS) General Purpose SSD volume. Add the EBS location of the files to the SQS queue.
D. Write the files to Amazon S3 Glacier Deep Archive. Add the S3 location of the files to the SQS queue.

Answer: A

Explanation:
* Why Option B is Correct:
* Amazon S3 Standard provides immediate access to files and is cost-effective for files that need to be accessed within 5 minutes.
* By adding the S3 location to the SQS queue, you avoid transferring large files directly, which is both more efficient and scalable.
* Why Other Options are Incorrect:
* Option A: S3 Glacier Deep Archive is designed for archival storage with retrieval times ranging from minutes to hours, which does not meet the 5-minute requirement.
* Option C: Amazon EBS is designed for block storage attached to EC2 instances, which adds unnecessary complexity and cost.
* Option D: SQS is not designed to handle large file content directly and has message size limits (256 KB).
* AWS Documentation References:
* Amazon S3 Overview
* Amazon SQS Best Practices

NEW QUESTION # 100
......

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DVA-C02 Real Torrent & DVA-C02 Valid Examcollection

DVA-C02 Valid Examcollection, Reliable DVA-C02 Guide Files

Amazon AWS Certified Developer - Associate Sample Questions (Q95-Q100):

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