- (Exam Topic 1)
A company's HTTP application is behind a Network Load Balancer (NLB). The NLB's target group is configured to use an Amazon EC2 Auto Scaling group with multiple EC2 instances that run the web service.
The company notices that the NLB is not detecting HTTP errors for the application. These errors require a manual restart of the EC2 instances that run the web service. The company needs to improve the application's availability without writing custom scripts or code.
What should a solutions architect do to meet these requirements?

1. A. Enable HTTP health checks on the NL
2. B. supplying the URL of the company's application.
3. C. Add a cron job to the EC2 instances to check the local application's logs once each minut
4. D. If HTTP errors are detected, the application will restart.
5. E. Replace the NLB with an Application Load Balance
6. F. Enable HTTP health checks by supplying the URL of the company's applicatio
7. G. Configure an Auto Scaling action to replace unhealthy instances.
8. H. Create an Amazon Cloud Watch alarm that monitors the UnhealthyHostCount metric for the NL
9. I. Configure an Auto Scaling action to replace unhealthy instances when the alarm is in the ALARM state.

Correct Answer: C

- (Exam Topic 3)
A media company hosts its website on AWS. The website application's architecture includes a fleet of Amazon EC2 instances behind an Application Load Balancer (ALB) and a database that is hosted on Amazon Aurora The company's cyber security teem reports that the application is vulnerable to SOL injection.
How should the company resolve this issue?

1. A. Use AWS WAF in front of the ALB Associate the appropriate web ACLs with AWS WAF.
2. B. Create an ALB listener rule to reply to SQL injection with a fixed response
3. C. Subscribe to AWS Shield Advanced to block all SQL injection attempts automatically.
4. D. Set up Amazon Inspector to block all SOL injection attempts automatically

Correct Answer: A

- (Exam Topic 3)
A company needs to migrate a legacy application from an on-premises data center to the AWS Cloud because of hardware capacity constraints. The application runs 24 hours a day. & days a week,. The application database storage continues to grow over time.
What should a solution architect do to meet these requirements MOST cost-affectivity?

1. A. Migrate the application layer to Amazon FC2 Spot Instances Migrate the data storage layer to Amazon S3.
2. B. Migrate the application layer to Amazon EC2 Reserved Instances Migrate the data storage layer to Amazon RDS On-Demand Instances.
3. C. Migrate the application layer to Amazon EC2 Reserved instances Migrate the data storage layer to Amazon Aurora Reserved Instances.
4. D. Migrate the application layer to Amazon EC2 On Demand Amazon Migrate the data storage layer to Amazon RDS Reserved instances.

Correct Answer: C

- (Exam Topic 1)
A company has an automobile sales website that stores its listings in a database on Amazon RDS When an automobile is sold the listing needs to be removed from the website and the data must be sent to multiple target systems.
Which design should a solutions architect recommend?

1. A. Create an AWS Lambda function triggered when the database on Amazon RDS is updated to send the information to an Amazon Simple Queue Service (Amazon SQS> queue for the targets to consume
2. B. Create an AWS Lambda function triggered when the database on Amazon RDS is updated to send the information to an Amazon Simple Queue Service (Amazon SQS) FIFO queue for the targets to consume
3. C. Subscribe to an RDS event notification and send an Amazon Simple Queue Service (Amazon SQS) queue fanned out to multiple Amazon Simple Notification Service (Amazon SNS) topics Use AWS Lambda functions to update the targets
4. D. Subscribe to an RDS event notification and send an Amazon Simple Notification Service (Amazon SNS) topic fanned out to multiple Amazon Simple Queue Service (Amazon SQS) queues Use AWS Lambda functions to update the targets

Correct Answer: D
https://docs.aws.amazon.com/lambda/latest/dg/services-rds.html https://docs.aws.amazon.com/lambda/latest/dg/with-sns.html

- (Exam Topic 3)
A solutions architect is designing the architecture for a software demonstration environment The environment will run on Amazon EC2 instances in an Auto Scaling group behind an Application Load Balancer (ALB) The system will experience significant increases in traffic during working hours but Is not required to operate on weekends.
Which combination of actions should the solutions architect take to ensure that the system can scale to meet demand? (Select TWO)

1. A. Use AWS Auto Scaling to adjust the ALB capacity based on request rate
2. B. Use AWS Auto Scaling to scale the capacity of the VPC internet gateway
3. C. Launch the EC2 instances in multiple AWS Regions to distribute the load across Regions
4. D. Use a target tracking scaling policy to scale the Auto Scaling group based on instance CPU utilization
5. E. Use scheduled scaling to change the Auto Scaling group minimum, maximum, and desired capacity to zero for weekends Revert to the default values at the start of the week

Correct Answer: DE