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QUESTION 1
A developer wants to send multi-value headers to an AWS Lambda function that is registered as a target with an Application Load Balancer (ALB). What should the developer do to achieve this?
A. Place the Lambda function and target group in the same account.
B. Send the request body to the Lambda function with a size less than 1 MB.
C. Include the Base64 encoding status, status code, status description, and headers in the Lambda function.
D. Enable the multi-value headers on the ALB.
Correct Answer: D
QUESTION 2
An application running on Amazon EC2 instances must access objects within an Amazon S3 bucket that
are encrypted using server-side encryption using AWS KMS encryption keys (SSE-KMS). The application
must have access to the customer master key (CMK) to decrypt the objects. Which combination of steps will grant the application access? (Select TWO.)
A. Write an S3 bucket policy that grants the bucket access to the key.
B. Grant access to the key in the IAM EC2 role attached to the application\\’s EC2 instances.
C. Write a key policy that enables IAM policies to grant access to the key.
D. Grant access to the key in the S3 bucket\\’s ACL
E. Create a Systems Manager parameter that exposes the KMS key to the EC2 instances.
Correct Answer: BC
https://aws.amazon.com/premiumsupport/knowledge-center/decrypt-kms-encrypted-objects-s3/ IAM role needs access to the keys to decrypt the object and key policies must allow role access to the key. Key policies are the primary way to control access to customer master keys (CMKs) in AWS KMS. You need permission to decrypt the AWS KMS key.
When a user sends a GET request, Amazon S3 checks if the AWS Identity and Access Management (IAM) user or role that sent the request is authorized to decrypt the key associated with the object. If the IAM user or role belongs to the same AWS account as the key, then the permission to decrypt must be granted on the AWS KMS key\\’s policy.
QUESTION 3
Multiple development teams are working on a project to migrate a monolithic application to a microservices-based application running on AWS Lambda. The teams need a way to centrally manage code that is shared across multiple functions. Which approach requires the LEAST maintenance?
A. Each team maintains the code for the common components in their own code repository. They build and deploy the components with their Lambda functions together.
B. One team builds a Lambda layer to include the common components and shares the layer with the other teams.
C. Each team builds and publishes the component they want to share to an Amazon S3 bucket. The Lambda functions will download the components from the bucket.
D. One team builds a Docker container for the common components and shares the container with the other teams.
Correct Answer: A
QUESTION 4
An application is experiencing performance issues based on increased demand. This increased demand is for read-only historical records pulled from an Amazon RDS-hosted database with custom views and queries. A developer improves performance without changing the database structure. Which approach will improve performance and MINIMIZE management overhead?
A. Deploy Amazon DynamoDB, move all the data, and point to DynamoDB.
B. Deploy Amazon ElasticCache for Redis and cache the data for the application.
C. Deploy Memcached on Amazon EC2 and cache the data for the application.
D. Deploy Amazon DynamoDB Accelerator (DAX) on Amazon RDS to improve cache performance
Correct Answer: B
QUESTION 5
A developer is working on a web application that runs on Amazon Elastic Container Service (Amazon ECS) and uses an Amazon DynamoDB table to store data. The application performs a large number of reading requests against a small set of the table data. How can the developer improve the performance of these requests\’? (Select TWO )
A. Create an Amazon ElastiCache cluster Configure the application to cache data in the cluster.
B. Create a DynamoDB Accelerator (DAX) cluster Configure the application to use the DAX cluster for DynamoDB requests
C. Configure the application to make strongly consistent read requests against the DynamoDB table
D. Increase the read capacity of the DynamoDB table
E. Enable DynamoDB adaptive capacity
Correct Answer: AB
QUESTION 6
A developer is creating a serverless web application and maintains different branches of code. The developer wants to avoid updating the Amazon API Gateway target endpoint each time a new code push is performed. What solution would allow the developer to perform a code push efficiently, without the need to update the API Gateway?
A. Associate different AWS Lambda functions to an API Gateway target endpoint.
B. Create different stages in API Gateway, then associate API Gateway with AWS Lambda.
C. Create aliases and versions in AWS Lambda.
D. Tag the AWS Lambda functions with different names.
Correct Answer: C
QUESTION 7
A developer is working on an internal web application that has low traffic. The application is deployed on Amazon EC2 instances and uses a Network Load Balancer (NLB) to distribute traffic. The developer needs to add Security Assertion Markup Language (SAML)-based authentication to the application.
Which solution will meet these requirements with the LEAST amount of development effort?
A. Enable authentication on the NLB listener. Connect the NLB to Amazon Cognito for authentication with SAML.
B. Change the load balancer to an Application Load Balancer (ALB), and enable authentication on the ALB listener. Connect the ALB to Amazon Cognito for authentication with SAML.
C. Implement SAML-based authentication in the application.
D. Create an Amazon CloudFront distribution, and implement SAML-based authentication by using an AWS Lambda@Edge function. Configure the Lambda@Edge function to access Amazon Cognito for temporary credentials.
Correct Answer: A
QUESTION 8
A Developer has an application that must accept a large number of incoming data streams and process the data before sending it to many downstream users. Which serverless solution should the Developer use to meet these requirements?
A. Amazon RDS MySQL stored procedure with AWS Lambda
B. AWS Direct Connect with AWS Lambda
C. Amazon Kinesis Data Streams with AWS Lambda
D. Amazon EC2 bash script with AWS Lambda
Correct Answer: C
Reference: https://aws.amazon.com/kinesis/data-analytics/faqs/
QUESTION 9
A Developer has a stateful web server on-premises that is being migrated to AWS. The Developer must have greater elasticity in the new design. How should the Developer re-factor the application to make it more elastic? (Choose two.)
A. Use pessimistic concurrency on Amazon DynamoDB
B. Use Amazon CloudFront with an Auto Scaling group
C. Use Amazon CloudFront with an AWS Web Application Firewall
D. Store session state data in an Amazon DynamoDB table
E. Use an ELB with an Auto Scaling group
Correct Answer: DE
QUESTION 10
A company maintains an application responsible for processing several thousand external callbacks each day. The company\\’s System administrators want to know how many callbacks are being received on a rolling basis, and they want this data available for 10 days.
The company also wants the ability to issue automated alerts if the number of callbacks exceeds the defined thresholds. What is the MOST cost-effective way to address the need to track and alert on these statistics?
A. Push callback data to an Amazon RDS database that can be queried to show historical data and to alert on exceeded thresholds.
B. Push callback data to AWS X-Ray and use AWS Lambda to query, display, and alert on exceeded thresholds.
C. Push callback data to Amazon Kinesis Data Streams and invoke an AWS Lambda function that stores data in Amazon DynamoDB and sends the required alerts.
D. Push callback data to Amazon CloudWatch as a custom metric and use the CloudWatch alerting mechanisms to alert System Administrators.
Correct Answer: D
QUESTION 11
A Lambda function processes data before sending it to a downstream service Each piece of data is approximately 1 MB in size After a security audit, the function t]is now required to encrypt the data before sending it downstream Which API call is required to perform the encryption?
A. Pass the data to the KMS ReEncrypi API for encryption
B. Use the KMS GenerateDataKey API to get an encryption key
C. Use the KMS GenerateDataKeyWithoutPlain.Text API to get an encryption key
D. Pass the data to KMS as part of the Encrypt API for encryption
Correct Answer: D
QUESTION 12
A developer is designing a distributed application built using a microservices architect spanning multiple AWS accounts. The company\\’s operations team wants to analyze and debug application issues from a centralized account. How can the developer meet these requirements?
A. Use an Amazon X-Ray agent with role assumption to publish data into the centralized account.
B. Use Amazon X-Ray and create a new IAM user to publish the access keys into the centralized account.
C. Use VPC Flow Logs to collect application logs across different accounts.
D. Enable AWS CloudTrail to publish the trails in an Amazon S3 bucket in the centralized account.
Correct Answer: A
QUESTION 13
A Developer created a Lambda function for a web application backend. When testing the Lambda function from the AWS Lambda console, the Developer can see that the function is being executed, but there is no log data being generated in Amazon CloudWatch Logs, even after several minutes. What could cause this situation?
A. The Lambda function does not have any explicit log statements for the log data to send it to CloudWatch Logs.
B. The Lambda function is missing CloudWatch Logs as a source trigger to send log data.
C. The execution role for the Lambda function is missing permissions to write log data to the CloudWatch Logs.
D. The Lambda function is missing a target CloudWatch Log group.
Correct Answer: C
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