| Question.96 A company runs a worker process on three Amazon EC2 instances. The instances are in an Auto Scaling group that is configured to use a simple scaling policy. The instances process messages from an Amazon Simple Queue Service (Amazon SQS) queue. Random periods of increased messages are causing a decrease in the performance of the worker process. A SysOps administrator must scale the instances to accommodate the increased number of messages. Which solution will meet these requirements? (A) Use CloudWatch to create a metric math expression to calculate the approximate age of the oldest message in the SQS queue. Create a target tracking scaling policy for the metric math expression to modify the Auto Scaling group. (B) Use CloudWatch to create a metric math expression to calculate the approximate number of messages visible in the SQS queue for each instance. Create a target tracking scaling policy for the metric math expression to modify the Auto Scaling group. (C) Create an Application Load Balancer (ALB). Attach the ALB to the Auto Scaling group. Create a target tracking scaling policy for the ALBRequestCountPerTarget metric to modify the Auto Scaling group. (D) Create an Application Load Balancer (ALB). Attach the ALB to the Auto Scaling group. Create a scheduled scaling policy for the Auto Scaling group. |
96. Click here to View Answer
Answer: B
| Question.97 An organization created an Amazon Elastic File System (Amazon EFS) volume with a file system ID of fs-85ba41fc, and it is actively used by 10 Amazon EC2 hosts. The organization has become concerned that the file system is not encrypted. How can this be resolved? (A) Enable encryption on each host’s connection to the Amazon EFS volume. Each connection must be recreated for encryption to take effect. (B) Enable encryption on the existing EFS volume by using the AWS Command Line Interface. (C) Enable encryption on each host’s local drive. Restart each host to encrypt the drive. (D) Enable encryption on a newly created volume and copy all data from the original volume. Reconnect each host to the new volume. |
97. Click here to View Answer
Answer: D
| Question.98 A company is running an ecommerce application on AWS. The application maintains many open but idle connections to an Amazon Aurora DB cluster. During times of peak usage, the database produces the following error message: Too many connections. The database clients are also experiencing errors. Which solution will resolve these errors? (A) Increase the read capacity units (RCUs) and the write capacity units (WCUs) on the database. (B) Configure RDS Proxy. Update the application with the RDS Proxy endpoint. (C) Turn on enhanced networking for the DB instances. (D) Modify the DB cluster to use a burstable instance type. |
98. Click here to View Answer
Answer: B
| Question.99 A company runs an application on hundreds of Amazon EC2 instances in three Availability Zones. The application calls a third-party API over the public internet. A SysOps administrator must provide the third party with a list of static IP addresses so that the third party can allow traffic from the application. Which solution will meet these requirements? (A) Add a NAT gateway in the public subnet of each Availability Zone. Make the NAT gateway the default route of all private subnets in those Availability Zones. (B) Allocate one Elastic IP address in each Availability Zone. Associate the Elastic IP address with all the instances in the Availability Zone. (C) Place the instances behind a Network Load Balancer (NLB). Send the traffic to the internet through the private IP address of the NLB. (D) Update the main route table to send the traffic to the internet through an Elastic IP address that is assigned to each instance. |
99. Click here to View Answer
Answer: C
| Question.100 A company has a high performance computing (HPC) application that runs on Amazon EC2 instances. The application requires minimum latency and maximum network throughput between nodes. How should a SysOps administrator deploy the EC2 instances to meet these requirements? (A) Use a cluster placement group in a single Availability Zone. (B) Use a cluster placement group across multiple Availability Zones. (C) Use a partition placement group in a single Availability Zone. (D) Use a partition placement group across multiple Availability Zones. |
100. Click here to View Answer
Answer: B