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AWS Certified Solutions Architect - Professional Questions and Answers

Question 133

A company is planning to migrate workloads from its on-premises data center to Amazon EC2 instances. The workloads run on physical servers and VMware virtual servers. The company has gathered details about each on-premises server and virtual server, including server specification, CPU utilization, and memory utilization. The company has stored these details in a .csv file named onprem.csv.

Before the migration, the company must estimate the cost of running the servers on AWS and must determine recommended EC2 instance types for the servers. The company must export this information to a different .csv file.

Which solution will meet these requirements?

Options:

Configure AWS Compute Optimizer to generate recommendations from an external source. Import the onprem.csv file. Export the Compute Optimizer recommendations to a new .csv file.

Import the onprem.csv file into AWS Migration Hub by using AWS Migration Hub import. Use EC2 instance recommendations from Migration Hub to generate recommendations. Export the recommendations to a new .csv file.

Deploy AWS Application Discovery Service Agentless Collector on premises. Use Agentless Collector to import the onprem.csv file. Send the file to AWS Migration Hub. Use EC2 instance recommendations from Migration Hub to generate recommendations. Export the recommendations to a new .csv file.

Upload the onprem.csv file to an Amazon S3 bucket. Configure Migration Evaluator to import the data from the S3 bucket. Generate and confirm recommendations by using Migration Evaluator Quick Insights. Export the final recommendations to a new .csv file in the S3 bucket.

Question 134

A company runs a serverless ecommerce application on AWS. The application uses API Gateway to invoke Java Lambda functions that connect to an Amazon RDS for MySQL database. During a sale event, traffic spikes caused slow performance and DB connection failures.

Which solution will improve performance with the LEAST application change?

Options:

Move DB connection outside Lambda handler and increase provisioned concurrency.

Use RDS Proxy. Store DB credentials in Secrets Manager. Update Lambda to use RDS Proxy. Increase provisioned concurrency.

Increase max_connections parameter in a custom DB parameter group and reboot. Increase reserved concurrency.

Use RDS Proxy and Secrets Manager. Increase reserved concurrency.

Question 135

A company is planning to migrate its applications from an on-premises data center to AWS. The on-premises data center has an AWS Direct Connect connection. The company needs to test IPv6 connectivity in the VPC so that the applications can communicate with more customers worldwide.

A solutions architect has created a VPC with an IPv6 CIDR block.

Which networking configurations will meet these requirements? (Select TWO.)

Options:

Launch an Amazon EC2 instance into a public subnet. Associate an IPv6 address with the instance during launch. Configure a security group, a network ACL, and route tables for IPv6 communication. Associate a virtual private gateway in the VPC with a Direct Connect gateway.

Launch an Amazon EC2 instance into a private subnet. Associate an IPv6 address with the instance during launch. Configure a security group, a network ACL, and route tables for IPv6 communication. Create a route that directs all IPv6 traffic from the private subnet to a NAT gateway.

Launch an Amazon EC2 instance into a public subnet. Associate an IPv6 address with the instance during launch. Configure a security group, a network ACL, and route tables for IPv6 communication. Create a route that directs all IPv6 traffic from the public subnet to an internet gateway.

Answer:

C, E

Explanation:

The requirement is to test IPv6 connectivity in an AWS VPC. When a VPC is associated with an IPv6 CIDR block, subnets can be configured to assign IPv6 addresses to resources, and routing must be correctly configured to allow IPv6 traffic to flow.

For public IPv6 connectivity, IPv6 traffic must be routed through an internet gateway. Unlike IPv4, IPv6 addresses are globally routable by default, and there is no concept of NAT for IPv6 egress through a NAT gateway. Therefore, for an EC2 instance in a public subnet that needs inbound and outbound IPv6 connectivity, the subnet route table must include a route that sends IPv6 traffic (::/0) to an internet gateway. Option C correctly describes this configuration and is a standard pattern for enabling IPv6 access for public subnets.

For private subnets that require outbound-only IPv6 connectivity (for example, instances that must initiate connections to the internet but must not accept inbound connections), AWS provides an egress-only internet gateway. An egress-only internet gateway allows outbound IPv6 traffic while blocking unsolicited inbound IPv6 traffic, similar in intent to how a NAT gateway is used for IPv4. Option E correctly uses an egress-only internet gateway for IPv6 traffic from a private subnet, making it the correct choice for private IPv6 connectivity testing.

Option A focuses on Direct Connect integration. Although Direct Connect can support IPv6, associating a virtual private gateway with a Direct Connect gateway is not required simply to test IPv6 connectivity to customers worldwide. This option also does not explicitly configure IPv6 internet routing and therefore does not directly meet the stated requirement.

Option B is incorrect because NAT gateways do not support IPv6. NAT gateways are IPv4-only services, so routing IPv6 traffic to a NAT gateway is not a valid configuration.

Option D is also incorrect because NAT instances do not provide a supported or recommended solution for IPv6 traffic. NAT-based designs are intended for IPv4 address translation and are not used for IPv6 connectivity in AWS.

Therefore, using an internet gateway for public IPv6 subnets and an egress-only internet gateway for private IPv6 subnets is the correct and supported approach.

[References:AWS documentation on IPv6 addressing in Amazon VPC, including requirements for internet gateways and egress-only internet gateways.AWS documentation describing that NAT gateways and NAT instances are IPv4-only and are not used for IPv6 traffic., , ]

Question 136

A company recently deployed an application on AWS. The application uses Amazon DynamoDB.The company measured the application load and configured the RCUs and WCUs on the DynamoDB table to match the expected peak load. The peak load occurs once a week for a 4-hour period and is double the average load. The application load is close to the average load tor the rest of the week. The access pattern includes many more writes to the table than reads of the table.

A solutions architect needs to implement a solution to minimize the cost of the table.

Which solution will meet these requirements?

Options:

Use AWS Application Auto Scaling to increase capacity during the peak period. Purchase reserved RCUs and WCUs to match the average load.

Configure on-demand capacity mode for the table.

Configure DynamoDB Accelerator (DAX) in front of the table. Reduce the provisioned read capacity to match the new peak load on the table.

Configure DynamoDB Accelerator (DAX) in front of the table. Configure on-demand capacity mode for the table.

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Download Full Version SAP-C02 Amazon Web Services Exam

AWS Certified Solutions Architect - Professional Questions and Answers

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