| Question.21 A company has a public web application that experiences rapid traffic increases after advertisements appear on local television. The application runs on Amazon EC2 instances that are in an Auto Scaling group. The Auto Scaling group is not keeping up with the traffic surges after an advertisement runs. The company often needs to scale out to 100 EC2 instances during the traffic surges. The instance startup times are lengthy because of a boot process that creates machine-specific data caches that are unique to each instance. The exact timing of when the advertisements will appear on television is not known. A SysOps administrator must implement a solution so that the application can function properly during the traffic surges. Which solution will meet these requirements? (A) Create e warm pool. Keep enough instances in the Stopped state to meet the increased demand. (B) Start 100 instances. Allow the boot process to finish running. Store this data on the instance store volume before stopping the instances. (C) Increase the value of the instance warmup time in the scaling policy (D) Use predictive scaling for the Auto Scaling group. |
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Answer: D
| Question.22 A company is using an AWS KMS customer master key (CMK) with imported key material. The company references the CMK by its alias in the Java application to encrypt data. The CMK must be rotated every 6 months. What is the process to rotate the key? (A) Enable automatic key rotation for the CMK, and specify a period of 6 months. (B) Create a new CMK with new imported material, and update the key alias to point to the new CMK. (C) Delete the current key material, and import new material into the existing CMK. (D) Import a copy of the existing key material into a new CMK as a backup, and set the rotation schedule for 6 months. |
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Answer: B
| Question.23 A SysOps administrator is responsible for managing a company’s cloud infrastructure with AWS CloudFormation. The SysOps administrator needs to create a single resource that consists of multiple AWS services. The resource must support creation and deletion through the CloudFormation console. Which CloudFormation resource type should the SysOps administrator create to meet these requirements? (A) AWS::EC2::Instance with a cfn-init helper script (B) AWS::OpsWorks::Instance (C) AWS::SSM::Document (D) Custom::MyCustomType |
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Answer: D
| Question.24 A SysOps administrator is creating a simple, public-facing website running on Amazon EC2. The SysOps administrator created the EC2 instance in an existing public subnet and assigned an Elastic IP address to the instance. Next, the SysOps administrator created and applied a new security group to the instance to allow incoming HTTP traffic from 0.0.0.0/0. Finally, the SysOps administrator created a new network ACL and applied it to the subnet to allow incoming HTTP traffic from 0.0.0.0/0. However, the website cannot be reached from the internet. What is the cause of this issue? (A) The SysOps administrator did not create an outbound rule that allows ephemeral port return traffic in the new network ACL. (B) The SysOps administrator did not create an outbound rule in the security group that allows HTTP traffic from port 80. (C) The Elastic IP address assigned to the EC2 instance has changed. (D) There is an additional network ACL associated with the subnet that includes a rule that denies inbound HTTP traffic from port 80. |
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Answer: A
| Question.25 A company uses an Amazon Simple Queue Service (Amazon SQS) standard queue with its application. The application sends messages to the queue with unique message bodies. The company decides to switch to an SQS FIFO queue. What must the company do to migrate to an SQS FIFO queue? (A) Create a new SQS FIFO queue. Turn on content-based deduplication on the new FIFO queue. Update the application to include a message group ID in the messages. (B) Create a new SQS FIFO queue. Update the application to include the DelaySeconds parameter in the messages. (C) Modify the queue type from SQS standard to SQS FIFO. Turn off content-based deduplication on the queue. Update the application to include a message group ID in the messages. (D) Modify the queue type from SQS standard to SQS FIFO. Update the application to send messages with identical message bodies and to include the DelaySeconds parameter in the messages. |
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Answer: B