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Amazon AWS Certified Solutions Architect - Associate Sample Questions (Q134-Q139):

NEW QUESTION # 134
A company has a web application that uses Amazon API Gateway to route HTTPS requests to AWS Lambda functions. The application uses an Amazon Aurora MySQL database for its data storage. The application has experienced unpredictable surges in traffic that overwhelm the database with too many connection requests.
The company wants to implement a scalable solution that is more resilient to database failures.
Which solution will meet these requirements MOST cost-effectively?

A. Increase the instance class of the database with more memory. Set a larger value for the max_connections parameter.
B. Create an Amazon RDS proxy for the database. Replace the database endpoint with the proxy endpoint in the Lambda functions.
C. Migrate the database to Amazon DynamoDB tables by using AWS Database Migration Service (AWS DMS).
D. Review the existing connections. Call MySQL queries to end any connections in the sleep state.

Answer: B

Explanation:
Amazon RDS Proxy helps manage and pool database connections from serverless compute like AWS Lambda, significantly reducing the stress on the database during unpredictable traffic surges. It improves scalability and resiliency by efficiently managing connections, protecting the database from being overwhelmed, and enabling failover handling.
Option A is the most cost-effective and operationally efficient approach to handling unpredictable surges and improving resilience without requiring major application changes.
Option B involves a migration to DynamoDB, which is a significant architectural change and costlier initially.
Option C is manual connection cleanup, insufficient for unpredictable surges. Option D increases resources but does not solve connection storm problems efficiently and is more costly.
References:
Amazon RDS Proxy (https://docs.aws.amazon.com/AmazonRDS/latest/UserGuide/rds-proxy.html) AWS Well-Architected Framework - Reliability Pillar (https://d1.awsstatic.com/whitepapers/architecture
/AWS_Well-Architected_Framework.pdf)
AWS Lambda Best Practices (https://docs.aws.amazon.com/lambda/latest/dg/best-practices.html)

NEW QUESTION # 135
A company has an application that runs on Amazon EC2 instances and uses an Amazon Aurora database. The EC2 instances connect to the database by using user names and passwords that are stored locally in a file. The company wants to minimize the operational overhead of credential management.
What should a solutions architect do to accomplish this goal?

A. Use AWS Secrets Manager. Turn on automatic rotation.
B. Use AWS Systems Manager Parameter Store. Turn on automatic rotation.
C. Create an encrypted Amazon Elastic Block Store (Amazon EBS) volume (or each EC2 instance. Attach the new EBS volume to each EC2 instance. Migrate the credential file to the new EBS volume. Point the application to the new EBS volume.
D. Create an Amazon S3 bucket lo store objects that are encrypted with an AWS Key Management Service (AWS KMS) encryption key. Migrate the credential file to the S3 bucket. Point the application to the S3 bucket.

Answer: A

Explanation:
Explanation
https://aws.amazon.com/cn/blogs/security/how-to-connect-to-aws-secrets-manager-service-within-a-virtual-priva
https://aws.amazon.com/blogs/security/rotate-amazon-rds-database-credentials-automatically-with-aws-secrets-m

NEW QUESTION # 136
An application runs on Amazon EC2 instances in private subnets. The application needs to access an Amazon DynamoDB table. What is the MOST secure way to access the table while ensuring that the traffic does not leave the AWS network?

A. Use the internet gateway attached to the VPC.
B. Use a NAT instance in a private subnet.
C. Use a NAT gateway in a public subnet.
D. Use a VPC endpoint for DynamoDB.

Answer: D

Explanation:
https://docs.aws.amazon.com/amazondynamodb/latest/developerguide/vpc-endpoints-dynamodb.html A VPC endpoint for DynamoDB enables Amazon EC2 instances in your VPC to use their private IP addresses to access DynamoDB with no exposure to the public internet. Your EC2 instances do not require public IP addresses, and you don't need an internet gateway, a NAT device, or a virtual private gateway in your VPC. You use endpoint policies to control access to DynamoDB. Traffic between your VPC and the AWS service does not leave the Amazon network.

NEW QUESTION # 137
A company's application integrates with multiple software-as-a-service (SaaS) sources for data collection. The company runs Amazon EC2 instances to receive the data and to upload the data to an Amazon S3 bucket for analysis. The same EC2 instance that receives and uploads the data also sends a notification to the user when an upload is complete. The company has noticed slow application performance and wants to improve the performance as much as possible.
Which solution will meet these requirements with the LEAST operational overhead?

A. Create an Amazon AppFlow flow to transfer data between each SaaS source and the S3 bucket. Configure an S3 event notification to send events to an Amazon Simple Notification Service (Amazon SNS) topic when the upload to the S3 bucket is complete.
B. Create an Amazon EventBridge (Amazon CloudWatch Events) rule for each SaaS source to send output data. Configure the S3 bucket as the rule's target. Create a second EventBridge (CloudWatch Events) rule to send events when the upload to the S3 bucket is complete. Configure an Amazon Simple Notification Service (Amazon SNS) topic as the second rule's target.
C. Create an Auto Scaling group so that EC2 instances can scale out. Configure an S3 event notification to send events to an Amazon Simple Notification Service (Amazon SNS) topic when the upload to the S3 bucket is complete.
D. Create a Docker container to use instead of an EC2 instance. Host the containerized application on Amazon Elastic Container Service (Amazon ECS). Configure Amazon CloudWatch Container Insights to send events to an Amazon Simple Notification Service (Amazon SNS) topic when the upload to the S3 bucket is complete.

Answer: A

NEW QUESTION # 138
A company has a stateless web application that runs on AWS Lambda functions that are invoked by Amazon API Gateway. The company v wants to deploy the application across multiple AWS Regions to provide Regional failover capabilities.
What should a solutions architect do to route traffic to multiple Regions?

A. Create a transit gateway. Attach the transit gateway to the API Gateway endpoint in each Region. Configure the transit gateway to route requests.
B. Create Amazon Route 53 health checks for each Region. Use an active-active failover configuration.
C. Create an Amazon CloudFront distribution with an origin for each Region. Use CloudFront health checks to route traffic.
D. Create an Application Load Balancer in the primary Region. Set the target group to point to the API Gateway endpoint hostnames in each Region.

Answer: A

Explanation:
This answer is correct because it provides Regional failover capabilities for the online gaming application by using AWS Global Accelerator. AWS Global Accelerator is a networking service that helps you improve the availability, performance, and security of your public applications. Global Accelerator provides two global static public IPs that act as a fixed entry point to your application endpoints, such as NLBs, in different AWS Regions. Global Accelerator uses the AWS global network to route traffic to the optimal regional endpoint based on health, client location, and policies that you configure. Global Accelerator also terminates TCP and UDP traffic at the edge locations, which reduces the number of hops and improves the network performance. By adding AWS Global Accelerator in front of the NLBs, you can achieve Regional failover for your online gaming application.
Reference:
https://docs.aws.amazon.com/global-accelerator/latest/dg/what-is-global-accelerator.html
https://aws.amazon.com/global-accelerator/

NEW QUESTION # 139
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