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| Section | Weight | Objectives |
|---|---|---|
| Security and Compliance | 18% | - Data protection and encryption - Security monitoring and auditing - Identity and access management (IAM) |
| Monitoring, Logging, and Remediation | 20% | - Centralized logging and log analysis with AWS services - Metrics and monitoring using Amazon CloudWatch - Automated remediation and operational workflows |
| Reliability and Business Continuity | 16% | - Data replication and recovery mechanisms - Backup and disaster recovery strategies - High availability and fault tolerance design |
| Cost and Performance Optimization | 28% | - Right-sizing and capacity planning - Cost monitoring and optimization strategies - Resource performance tuning |
| Deployment, Provisioning, and Automation | 18% | - Infrastructure as Code using AWS CloudFormation - Automated deployment pipelines - Configuration management and orchestration tools |
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질문 # 322
A CloudOps engineer is working on cost savings for a company. The CloudOps engineer notices multiple unused Elastic IP addresses. The addresses are spread across different accounts and AWS Regions in an organization in AWS Organizations.
The CloudOps engineer must administer and track the addresses based on security domains.
The CloudOps engineer must be able to view the history of assigned addresses.
Which solution will meet these requirements?
정답：B
설명：
Amazon VPC IP Address Manager supports organization-wide IP address tracking across accounts and AWS Regions. It can group and administer IP usage by security or business domains through IPAM scopes and pools, and it provides visibility into IP address allocation history, including assigned and unassigned addresses.
질문 # 323
A CloudOps engineer creates a new VPC that contains a private subnet, a security group that allows all outbound traffic, and an endpoint for Amazon EC2 Instance Connect in a private subnet. The CloudOps engineer associates the security group with EC2 Instance Connect.
The CloudOps engineer launches an EC2 instance from an Amazon Linux Amazon Machine Image (AMI) in the private subnet. The CloudOps engineer launches the EC2 instance without an SSH key pair.
The CloudOps engineer tries to connect to the instance by using the EC2 Instance Connect endpoint.
However, the connection fails.
How can the CloudOps engineer connect to the instance?
정답：D
설명：
Amazon EC2 Instance Connect enables secure SSH access to EC2 instances without requiring a traditional SSH key pair. However, although authentication is handled through IAM and the Instance Connect endpoint, the underlying network requirements for SSH still apply.
For EC2 Instance Connect to function, the EC2 instance's security group must allow inbound traffic on TCP port 22 from the network where the Instance Connect endpoint resides. In this case, both the endpoint and the EC2 instance are in the private subnet, so the security group must explicitly allow SSH traffic from that subnet or from the security group associated with the endpoint.
Allowing HTTPS traffic on port 443 does not enable SSH access. Systems Manager Session Manager is a separate access mechanism and does not resolve an EC2 Instance Connect failure. Recreating the instance with an SSH key pair is unnecessary because EC2 Instance Connect does not rely on key pairs.
Therefore, enabling inbound SSH traffic on port 22 from the private subnet resolves the connection issue.
질문 # 324
A company uses multiple Amazon RDS databases to support an application. The application receives all its traffic during weekdays and is idle during weekends. The company wants a solution to automatically manage the RDS DB instances during idle periods to optimize costs.
Which solution will meet these requirements?
정답：A
설명：
Comprehensive Explanation (250-350 words):
The Instance Scheduler on AWS is an AWS-provided solution designed specifically to start and stop AWS resources such as Amazon RDS instances on a defined schedule. This directly aligns with the requirement to automatically manage RDS instances during predictable idle periods, such as weekends, to reduce costs.
RDS instances incur compute charges while running, even if idle. Stopping them during weekends eliminates those charges while retaining storage and backups. Instance Scheduler supports tag-based scheduling, centralized management, and automated start/stop workflows without custom scripting.
Option A introduces custom automation and ongoing maintenance overhead. Option C (Reserved Instances) is unsuitable because the databases are idle for long, predictable periods and Reserved Instances charge regardless of usage. Option D is incorrect because RDS does not support auto scaling of DB instance classes based on utilization.
Instance Scheduler is the most cost-effective and operationally efficient solution for this use case.
질문 # 325
A company has a VPC that contains a public subnet and a private subnet. The company deploys an Amazon EC2 instance that uses an Amazon Linux AMI and has the AWS Systems Manager Agent (SSM Agent) installed in the private subnet. The EC2 instance is in a security group that allows only outbound traffic.
A CloudOps engineer needs to give a group of privileged administrators the ability to connect to the instance through SSH without exposing the instance to the internet.
Which solution will meet this requirement?
정답：A
설명：
Comprehensive Explanation (250-350 words):
EC2 Instance Connect Endpoint (EICE) enables secure SSH access to instances in private subnets without requiring public IP addresses, bastion hosts, or inbound internet access. By deploying the endpoint in the private subnet, administrators can connect securely using IAM-based authentication.
The instance security group must allow inbound SSH (port 22) from the EICE security group. Access control is handled via IAM, which eliminates the need to distribute or manage SSH keys.
Option B incorrectly attempts to use Systems Manager for SSH, which is unnecessary when EICE is available. Option C incorrectly places the endpoint in a public subnet, which does not align with the requirement to keep access private. Option D is incorrect because Systems Manager Session Manager does not require SSH and AmazonEC2ReadOnlyAccess does not allow instance access.
EICE provides the least overhead and most secure SSH access path for private EC2 instances.
질문 # 326
A company runs an application on Amazon EC2 instances that are in an Amazon EC2 Auto Scaling group. Scale-out actions take a long time to become complete because of long-running boot scripts. A CloudOps engineer must implement a solution to reduce the required time for scale-out actions without overprovisioning the Auto Scaling group.
Which solution will meet these requirements?
정답：B
설명：
An Auto Scaling warm pool keeps a set of pre-initialized EC2 instances in a "stopped" or
"running" state, ready to be quickly added to the active instance pool when scaling out. This significantly reduces scale-out latency caused by lengthy boot scripts, without permanently running extra instances (avoiding overprovisioning). Once demand increases, instances from the warm pool can be launched almost instantly.
질문 # 327
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