Amazon SOA-C02-2 Exam Questions

Question 6 of 932

When attached to an Amazon VPC, which two components provide connectivity with external networks? (Choose two.)

Elastic IPS (EIP)

NAT Gateway (NAT)

Internet Gateway {IGW)

Virtual Private Gateway (VGW)

Correct Answer: B, C

When attached to an Amazon VPC, the Internet Gateway (IGW) and NAT Gateway (NAT) are the components that provide connectivity with external networks. The Internet Gateway allows traffic to flow between the VPC and the internet, enabling instances in public subnets to communicate with external networks. The NAT Gateway allows instances in private subnets to access the internet for outbound connections, such as downloading software updates, while preventing inbound internet traffic from reaching those instances.

Question 7 of 932

Your application currently leverages AWS Auto Scaling to grow and shrink as load Increases/ decreases and has been performing well. Your marketing team expects a steady ramp up in traffic to follow an upcoming campaign that will result in a 20x growth in traffic over 4 weeks. Your forecast for the approximate number of Amazon EC2 instances necessary to meet the peak demand is 175.
What should you do to avoid potential service disruptions during the ramp up in traffic?

Ensure that you have pre-allocated 175 Elastic IP addresses so that each server will be able to obtain one as it launches

Check the service limits in Trusted Advisor and adjust as necessary so the forecasted count remains within limits.

Change your Auto Scaling configuration to set a desired capacity of 175 prior to the launch of the marketing campaign

Pre-warm your Elastic Load Balancer to match the requests per second anticipated during peak demand prior to the marketing campaign

Correct Answer: B

To avoid potential service disruptions during the 20x growth ramp-up in traffic, you should check and adjust the AWS service limits in Trusted Advisor to ensure that the number of necessary EC2 instances (175) falls within the allowed limits for your AWS account. AWS imposes quotas (limits) on the number of resources that can be created, and if you do not adjust these limits, the Auto Scaling group will not be able to provision the required number of instances, leading to service disruptions.

Question 8 of 932

You have an Auto Scaling group associated with an Elastic Load Balancer (ELB). You have noticed that instances launched via the Auto Scaling group are being marked unhealthy due to an ELB health check, but these unhealthy instances are not being terminated.
What do you need to do to ensure trial instances marked unhealthy by the ELB will be terminated and replaced?

Change the thresholds set on the Auto Scaling group health check

Add an Elastic Load Balancing health check to your Auto Scaling group

Increase the value for the Health check interval set on the Elastic Load Balancer

Change the health check set on the Elastic Load Balancer to use TCP rather than HTTP checks

Correct Answer: B

To ensure that instances marked unhealthy by the ELB are terminated and replaced, you need to add an Elastic Load Balancing (ELB) health check to your Auto Scaling group. When you add an ELB health check to the Auto Scaling group, it will consider the health status determined by the ELB in deciding whether to terminate and replace instances.

Question 9 of 932

Which two AWS services provide out-of-the-box user configurable automatic backup-as-a-service and backup rotation options? (Choose two.)

Amazon S3

Amazon RDS

Amazon EBS

Amazon Red shift

Correct Answer: B, D

Amazon RDS and Amazon Redshift both provide out-of-the-box user configurable automatic backup-as-a-service features. Amazon RDS enables automated backups of your DB Instance with a configurable retention period, and Amazon Redshift allows for automated backups of your data warehouse cluster with a retention period as well. These features are inherent to their services and do not require additional manual configuration for backup and rotation.

Question 10 of 932

An organization has configured a VPC with an Internet Gateway (IGW). pairs of public and private subnets (each with one subnet per Availability Zone), and an
Elastic Load Balancer (ELB) configured to use the public subnets. The application s web tier leverages the ELB. Auto Scaling and a mum-AZ RDS database instance The organization would like to eliminate any potential single points ft failure in this design.
What step should you take to achieve this organization's objective?

Nothing, there are no single points of failure in this architecture.

Create and attach a second IGW to provide redundant internet connectivity.

Create and configure a second Elastic Load Balancer to provide a redundant load balancer.

Create a second multi-AZ RDS instance in another Availability Zone and configure replication to provide a redundant database.

Correct Answer: A

The architecture as described has no single points of failure. The Internet Gateway (IGW) is inherently highly available, and the Elastic Load Balancer (ELB) is designed to operate across multiple Availability Zones, offering high availability and fault tolerance. Additionally, the RDS instance is configured for multi-Availability Zone deployment, which ensures high availability for the database. Therefore, no extra configurations are necessary to eliminate single points of failure.