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NEW QUESTION # 63
A CloudOps engineer has created a VPC that contains a public subnet and a private subnet. Amazon EC2 instances that were launched in the private subnet cannot access the internet. The default network ACL is active on all subnets in the VPC, and all security groups allow outbound traffic.
Which solution will provide the EC2 instances in the private subnet with access to the internet?
- A. Create a NAT gateway in the public subnet. Create a route from the public subnet to the NAT gateway.
- B. Create a NAT gateway in the private subnet. Create a route from the private subnet to the NAT gateway.
- C. Create a NAT gateway in the public subnet. Create a route from the private subnet to the NAT gateway.
- D. Create a NAT gateway in the private subnet. Create a route from the public subnet to the NAT gateway.
Answer: C
Explanation:
According to the AWS Cloud Operations and Networking documentation, instances in a private subnet do not have a direct route to the internet gateway and thus require a NAT gateway for outbound internet access.
The correct configuration is to create a NAT gateway in the public subnet, associate an Elastic IP address, and then update the private subnet's route table to send all 0.0.0.0/0 traffic to the NAT gateway. This enables instances in the private subnet to initiate outbound connections while keeping inbound traffic blocked for security.
Placing the NAT gateway inside the private subnet (Options C or D) prevents connectivity because it would not have a route to the internet gateway. Configuring routes from the public subnet to the NAT gateway (Option B) does not serve private subnet traffic.
Hence, Option A follows AWS best practices for enabling secure, managed, outbound-only internet access from private resources.
NEW QUESTION # 64
A company runs an application on a large fleet of Amazon EC2 instances to process financial transactions. The EC2 instances share data by using an Amazon Elastic File System (Amazon EFS) file system.
The company wants to deploy the application to a new Availability Zone and has created new subnets and a mount target in the new Availability Zone. When a SysOps administrator launches new EC2 instances in the new subnets, the EC2 instances are unable to mount the file system.
What is a reason for this issue?
- A. The IAM role that is associated with the EC2 instances does not allow the efs:MountFileSystem action.
- B. The security group for the mount target does not allow inbound NFS connections from the security group used by the EC2 instances.
- C. The route tables have not been configured to route traffic to a VPC endpoint for Amazon EFS in the new Availability Zone.
- D. The EFS mount target has been created in a private subnet.
Answer: B
Explanation:
When you add a new EFS mount target in a new Availability Zone, that mount target has its own security group. For the EC2 instances in that AZ to mount the file system over NFS, the mount target's security group must allow inbound TCP 2049 (NFS) from the EC2 instances' security group.
If that rule isn't there, the instances can see the mount target in the same VPC/AZ but can't complete the NFS connection, so the mount fails.
NEW QUESTION # 65
A company operates compute resources in a VPC and in the company's on-premises data center. The company already has an AWS Direct Connect connection between the VPC and the on-premises data center.
A CloudOps engineer needs to ensure that Amazon EC2 instances in the VPC can resolve DNS names for hosts in the on-premises data center.
Which solution will meet this requirement with the LEAST amount of ongoing maintenance?
- A. Add the hostnames and IP addresses for the on-premises hosts to the /etc/hosts file of each EC2 instance.
- B. Set up a forwarding rule for reverse DNS queries in Amazon Route 53 Resolver. Set the enableDnsHostnames attribute to true for the VPC.
- C. Create an Amazon Route 53 Resolver outbound endpoint. Add the IP addresses of an on-premises DNS server for the domain names that need to be forwarded.
- D. Create an Amazon Route 53 private hosted zone. Populate the zone with the hostnames and IP addresses of the hosts in the on-premises data center.
Answer: C
Explanation:
Amazon Route 53 Resolver outbound endpoints enable Amazon VPC resources to forward DNS queries to DNS servers that are outside of AWS, such as on-premises DNS servers. Because the company already has AWS Direct Connect in place, DNS queries can be routed privately from the VPC to the on-premises DNS infrastructure without using the public internet.
By creating an outbound endpoint and configuring forwarding rules for the on-premises domains, EC2 instances in the VPC can resolve DNS names dynamically using the existing authoritative DNS servers. This approach requires minimal ongoing maintenance because DNS records continue to be managed centrally in the on-premises DNS system.
Manually populating a private hosted zone or /etc/hosts files would require constant updates and does not scale. Reverse DNS forwarding alone does not solve forward name resolution.
Therefore, using Route 53 Resolver outbound endpoints is the correct solution.
NEW QUESTION # 66
A company runs a web application on three Amazon EC2 instances behind an Application Load Balancer (ALB). The company notices that random periods of increased traffic cause a degradation in the application's performance. A CloudOps engineer must scale the application to meet the increased traffic.
Which solution meets these requirements?
- A. Deploy the application to an Auto Scaling group of EC2 instances with a scheduled scaling policy.Attach the ALB to the Auto Scaling group.
- B. Deploy the application to an Auto Scaling group of EC2 instances with a target tracking scaling policy. Attach the ALB to the Auto Scaling group.
- C. Create an Amazon CloudWatch alarm to monitor application latency and increase the size of each EC2 instance if the desired threshold is reached.
- D. Create an Amazon EventBridge rule to monitor application latency and add an EC2 instance to the ALB if the desired threshold is reached.
Answer: B
Explanation:
An Auto Scaling group (ASG) with a target tracking scaling policy automatically adjusts the number of EC2 instances based on real-time demand (for example, CPU utilization or request count). This allows the application to handle sudden, volatile traffic spikes seamlessly while maintaining performance. The Application Load Balancer (ALB) distributes traffic evenly among the instances in the ASG, ensuring scalability and fault tolerance without manual intervention.
NEW QUESTION # 67
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?
- A. Recreate the EC2 instance. Associate an SSH key pair with the instance.
- B. Create an inbound rule in the security group to allow SSH traffic on port 22 from the private subnet.
- C. Create an IAM instance profile that allows AWS Systems Manager Session Manager to access the EC2 instance. Associate the instance profile with the instance.
- D. Create an inbound rule in the security group to allow HTTPS traffic on port 443 from the private subnet.
Answer: B
Explanation:
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.
NEW QUESTION # 68
A company runs custom statistical analysis software on a cluster of Amazon EC2 instances. The software is highly sensitive to network latency between nodes, although network throughput is not a limitation.
Which solution will minimize network latency?
- A. Place all the EC2 instances into a spread placement group in the same AWS Region.
- B. Configure and assign two Elastic IP addresses for each EC2 instance.
- C. Place all the EC2 instances into a cluster placement group.
- D. Configure jumbo frames on all the EC2 instances in the cluster.
Answer: C
Explanation:
The AWS Cloud Operations and Compute documentation explains that placement groups control how EC2 instances are physically arranged within AWS data centers to optimize network performance.
Among the available placement strategies:
Cluster placement groups place instances physically close together within a single Availability Zone, connected through high-bandwidth, low-latency networking (ideal for tightly coupled, HPC, or distributed workloads).
Spread placement groups distribute instances across distinct racks or Availability Zones for fault tolerance, increasing latency.
Partition placement groups separate instances into partitions for isolation, not latency reduction.
Therefore, to minimize latency for workloads such as computational clusters, the CloudOps engineer should use a cluster placement group. This placement ensures single-digit microsecond latency and enhanced packet rate performance between instances.
Elastic IPs (Option B) do not influence internal networking. Jumbo frames (Option C) can marginally improve throughput but do not reduce propagation latency. Spread placement (Option D) increases distance, worsening latency.
Hence, Option A - using a cluster placement group - delivers the lowest possible network latency and is AWS's best-practice design for HPC-style clusters.
NEW QUESTION # 69
A company uses hundreds of Amazon EC2 On-Demand Instances and Spot Instances to run production and non-production workloads. The company installs and configures the AWS Systems Manager Agent (SSM Agent) on the EC2 instances.
During a recent instance patch operation, some instances were not patched because the instances were either busy or down. The company needs to generate a report that lists the current patch version of all instances.
Which solution will meet these requirements in the MOST operationally efficient way?
- A. Use AWS Config to track EC2 instance configuration changes by using output from the SSM Agents.
Create a custom rule to check for patch versions. Generate a report of all unpatched instances. - B. Use Systems Manager Inventory to collect patch versions. Generate a report of all instances.
- C. Use AWS Config to monitor the patch status of the EC2 instances by using output from the SSM Agents. Create a configuration compliance rule to check whether patches are installed. Generate a report of all instances.
- D. Use Systems Manager Run Command to remotely collect patch version information. Generate a report of all instances.
Answer: B
Explanation:
AWS Systems Manager Inventory is designed to collect metadata from managed instances, including installed software, applications, and patch information. It works asynchronously and does not require instances to be actively running a command at the time of collection, which is critical when instances may be busy or temporarily unavailable during patch windows.
Inventory data is stored centrally and can be queried to generate reports showing the current patch level or installed patch versions across all managed instances. This makes it well-suited for large fleets that include both On-Demand and Spot Instances and that may scale dynamically.
Option B relies on Run Command, which requires instances to be online and available at execution time. This does not meet the requirement because some instances were already missed during patch operations due to being busy or down. Option C and Option D use AWS Config, which is primarily intended for configuration compliance and drift detection, not detailed patch version reporting. Creating custom or managed rules for patch status introduces unnecessary complexity and overhead compared to Inventory's built-in capability.
Therefore, Systems Manager Inventory provides the most operationally efficient and reliable solution for collecting and reporting patch version data across all EC2 instances.
NEW QUESTION # 70
An Amazon EC2 instance is running an application that uses Amazon Simple Queue Service (Amazon SQS) queues. A CloudOps engineer must ensure that the application can read, write, and delete messages from the SQS queues.
Which solution will meet these requirements in the MOST secure manner?
- A. Create and associate an IAM role that allows EC2 instances to call AWS services. Attach an IAM policy to the role that allows the sqs:SendMessage permission, the sqs:ReceiveMessage permission, and the sqs:DeleteMessage permission to the appropriate queues.
- B. Create an IAM user with an IAM policy that allows the sqs:SendMessage permission, the sqs:
ReceiveMessage permission, and the sqs:DeleteMessage permission to the appropriate queues. Export the IAM user's access key and secret access key as environment variables on the EC2 instance. - C. Create an IAM user with an IAM policy that allows the sqs:SendMessage permission, the sqs:
ReceiveMessage permission, and the sqs:DeleteMessage permission to the appropriate queues. Embed the IAM user's credentials in the application's configuration. - D. Create and associate an IAM role that allows EC2 instances to call AWS services. Attach an IAM policy to the role that allows sqs:* permissions to the appropriate queues.
Answer: A
Explanation:
The most secure pattern is to use an IAM role for Amazon EC2 with the minimum required permissions.
AWS guidance states: "Use roles for applications that run on Amazon EC2 instances" and "grant least privilege by allowing only the actions required to perform a task." By attaching a role to the instance, short- lived credentials are automatically provided through the instance metadata service; this removes the need to create long-term access keys or embed secrets. Granting only sqs:SendMessage, sqs:ReceiveMessage, and sqs:DeleteMessage against the specific SQS queues enforces least privilege and aligns with CloudOps security controls. Options A and B rely on IAM user access keys, which contravene best practices for workloads on EC2 and increase credential-management risk. Option C uses a role but grants sqs:*, violating least-privilege principles. Therefore, Option D meets the security requirement with scoped, temporary credentials and precise permissions.
References:* AWS Certified CloudOps Engineer - Associate (SOA-C03) Exam Guide - Security & Compliance* IAM Best Practices - "Use roles instead of long-term access keys," "Grant least privilege"* IAM Roles for Amazon EC2 - Temporary credentials for applications on EC2* Amazon SQS - Identity and access management for Amazon SQS
NEW QUESTION # 71
A company's developers manually install software modules on Amazon EC2 instances to deploy new versions of a service. A security audit finds that instances contain inconsistent and unapproved modules.
A CloudOps engineer must create a new instance image that contains only approved software.
Which solution will meet these requirements?
- A. Use AWS Systems Manager Run Command to install the approved modules on all running instances during an in-place update.
- B. Use Amazon Detective to continuously find and uninstall unauthorized modules from the instances.
- C. Use EC2 Image Builder to create and test an Amazon Machine Image (AMI) that includes only the approved modules. Update the deployment workflow to use the new AMI.
- D. Use Amazon GuardDuty to create and deploy an Amazon Machine Image (AMI) that includes only the approved modules.
Answer: C
Explanation:
According to the AWS Cloud Operations and Deployment documentation, EC2 Image Builder is the AWS-managed service for automating the creation, maintenance, validation, and deployment of secure and compliant Amazon Machine Images (AMIs).
It allows CloudOps teams to define image pipelines that include only approved software modules and configuration scripts. EC2 Image Builder automatically tests and verifies these AMIs for compliance before deployment.
This process ensures configuration consistency, eliminates manual installation errors, and simplifies ongoing patch management. The service integrates with AWS Systems Manager, Amazon Inspector, and AWS CloudFormation for end-to-end automation.
In contrast:
* Amazon Detective and GuardDuty (Options A & B) are security monitoring tools, not image management solutions.
* Run Command (Option C) applies ad-hoc updates but does not create standard, reusable AMIs.
Therefore, Option D is correct-EC2 Image Builder provides the most operationally efficient and compliant way to create an approved baseline AMI for future deployments.
Reference: AWS Cloud Operations & Deployment Guide - Building Secure, Consistent AMIs Using EC2 Image Builder
NEW QUESTION # 72
A CloudOps engineer needs to set up alerting and remediation for a web application. The application consists of Amazon EC2 instances that have AWS Systems Manager Agent (SSM Agent) installed. Each EC2 instance runs a custom web server. The EC2 instances run behind a load balancer and write logs locally.
The CloudOps engineer must implement a solution that restarts the web server software automatically if specific web errors are detected in the logs.
Which combination of steps will meet these requirements? (Select THREE.)
- A. Create an Amazon CloudWatch metric filter for the web logs. Configure an alarm for the specific errors.
- B. Create an Amazon Simple Notification Service (Amazon SNS) notification that responds to the alarm. Configure the notification to invoke an AWS Systems Manager Automation runbook to restart the web server software.
- C. Create an Amazon EventBridge rule that responds to the alarm. Configure the rule to invoke an AWS Systems Manager Automation runbook to restart the web server software.
- D. Create an AWS CloudTrail metric filter for the web logs. Configure an alarm for the specific errors.
- E. Install the Amazon CloudWatch agent on the EC2 instances.
- F. Publish alarm findings to Amazon Simple Email Service (Amazon SES). Invoke an AWS Lambda function to restart the web server software.
Answer: A,C,E
Explanation:
Per the AWS Cloud Operations, Monitoring, and Automation documentation, the correct workflow for automated operational remediation is:
Amazon CloudWatch Agent is installed on each EC2 instance (Option A) to collect local log data and push it to Amazon CloudWatch Logs.
A CloudWatch Metric Filter (Option C) is then defined to identify specific error strings or patterns within those logs (e.g., "HTTP 5xx" or "Service Unavailable"). When such an event occurs, CloudWatch Alarms are triggered.
Upon alarm activation, Amazon EventBridge rules (Option E) are configured to respond automatically by invoking an AWS Systems Manager Automation runbook, which executes an action to restart the web server process on the affected instance via SSM Agent.
This approach aligns directly with AWS's recommended CloudOps remediation pattern, known as event-driven automation, which ensures minimal downtime and eliminates manual intervention.
Options involving CloudTrail (B) or SES notifications (D) are incorrect because they are unrelated to log-based application monitoring and automated remediation workflows.
NEW QUESTION # 73
A CloudOps engineer needs to ensure that AWS resources across multiple AWS accounts are tagged consistently. The company uses an organization in AWS Organizations to centrally manage the accounts. The company wants to implement cost allocation tags to accurately track the costs that are allocated to each business unit.
Which solution will meet these requirements with the LEAST operational overhead?
- A. Use AWS Service Catalog to provision only pre-tagged resources. Use AWS Trusted Advisor to enforce tagging across the organization.
- B. Configure AWS CloudTrail events to invoke an AWS Lambda function to detect untagged resources and to automatically assign tags based on predefined rules.
- C. Use AWS Config to evaluate tagging compliance. Use AWS Budgets to apply tags for cost allocation.
- D. Use Organizations tag policies to enforce mandatory tagging on all resources. Enable cost allocation tags in the AWS Billing and Cost Management console.
Answer: D
Explanation:
AWS Organizations Tag Policies provide a centralized, scalable governance mechanism to standardize tagging across accounts. Tag policies let an organization define tag keys, allowed values, and tagging expectations, helping teams apply consistent tagging conventions across many accounts without building custom logic. This matches the requirement for consistent tags "across multiple accounts" with minimal operational overhead, because the policy is managed centrally and applied at the organization/OUs level.
For cost tracking, user-defined tags must be activated as cost allocation tags in AWS Billing and Cost Management. Enabling cost allocation tags is the required step to make those tags usable in billing views (for example, Cost Explorer allocation and reporting). Combining Tag Policies (governance/consistency) with cost allocation tag activation (billing attribution) directly meets both parts of the requirement.
Option B (CloudTrail + Lambda auto-tagging) is higher operational overhead: it requires event processing, permissions, continuous maintenance, exception handling, and careful logic to avoid incorrect tag assignments. Option C is partially relevant for compliance detection, but AWS Budgets does not "apply tags" to resources; Budgets is for cost/usage alerts and budget tracking. Option D can enforce tagged provisioning paths, but it's not comprehensive for all resource creation mechanisms and Trusted Advisor is not a global
"tag enforcement" engine.
Therefore, A is the most native and least-ops approach for consistent tags across an organization and enabling cost allocation tracking.
NEW QUESTION # 74
A company's application servers in AWS account 111122223333 use a security group sg-1234abcd. They need to access a database hosted in account 444455556666. The VPCs are connected using a VPC peering connection (pcx-b04deed9).
A CloudOps engineer must configure the database's security group to allow new connections only from the application servers.
What should the engineer do?
- A. Add an inbound rule to the database's security group. Reference 444455556666/sg-1234abcd as the source.
- B. Add an inbound rule to the database's security group. Reference 111122223333/sg-1234abcd as the source.
- C. Add an inbound rule to the database's security group. Reference pcx-b04deed9/sg-1234abcd as the source.
- D. Add an inbound rule to the database's security group. Reference sg-1234abcd as the source.
Answer: D
Explanation:
According to AWS Cloud Operations and VPC Networking documentation, when VPCs are peered, security groups can reference peer account security groups directly to restrict traffic between them.
This feature allows specifying the security group ID (sg-1234abcd) from the source account (111122223333) in the target database's security group inbound rule. AWS automatically validates that the VPCs are connected through an existing VPC peering connection and that mutual permissions are properly configured.
You do not prefix the security group ID with the account or peering connection (Options A and B), and using the destination account ID (Option D) is incorrect because it represents the database side, not the source.
Hence, the correct configuration is Option C, which references the application servers' security group directly for precise, least-privilege access control.
NEW QUESTION # 75
A company hosts a static website in Amazon S3 behind an Amazon CloudFront distribution.
When new versions are deployed, users sometimes do not see updated content immediately.
Which solution will meet this requirement?
- A. Create a CloudFront invalidation.
- B. Configure the CloudFront distribution to add a custom Cache-Control header to requests for content from the S3 bucket.
- C. Attach the CachingOptimized managed cache policy to the distribution.
- D. Modify the distribution settings to specify the protocol as HTTPS only.
Answer: A
Explanation:
The AWS Cloud Operations and Content Delivery documentation explains that Amazon CloudFront caches objects in edge locations for a defined time based on TTL settings or origin headers. When new content is deployed to the S3 origin, previously cached versions remain in edge caches until they expire.
To immediately serve the new version, CloudOps engineers must initiate a CloudFront invalidation, which removes cached objects from all edge locations. This forces CloudFront to fetch the latest version from the origin (S3).
Invalidations can target individual objects (e.g., /index.html) or wildcard paths (e.g., /*) and are the AWS-recommended approach for dynamic content refresh after static site updates.
Changing headers (Option A), enforcing HTTPS (Option B), or applying caching policies (Option C) do not directly refresh outdated cache content.
Thus, Option D -- issuing a CloudFront invalidation -- ensures users receive the latest website content immediately after deployment.
NEW QUESTION # 76
A company is implementing security and compliance by using AWS Trusted Advisor. The company's CloudOps team is validating the list of Trusted Advisor checks that it can access.
Which factor will affect the quantity of available Trusted Advisor checks?
- A. Whether the AWS account root user has multi-factor authentication (MFA) enabled
- B. Whether at least one Amazon EC2 instance is in the running state
- C. The AWS Support plan
- D. An AWS Organizations service control policy (SCP)
Answer: C
Explanation:
The number of AWS Trusted Advisor checks available to an account depends on the AWS Support plan associated with the account. The Basic and Developer support plans provide access to a limited set of Trusted Advisor checks, primarily focused on security and service limits.
The Business and Enterprise support plans provide full access to all Trusted Advisor checks, including cost optimization, performance, fault tolerance, and security categories.
Running EC2 instances, SCPs, or MFA settings do not affect the availability of Trusted Advisor checks.
Therefore, the AWS Support plan determines the quantity of available Trusted Advisor checks.
NEW QUESTION # 77
A company has an AWS CloudFormation template that includes an AWS::EC2::Instance resource and a custom resource (Lambda function). The Lambda function fails because it runs before the EC2 instance is launched.
Which solution will resolve this issue?
- A. Add a DependsOn attribute to the custom resource. Specify the EC2 instance in the DependsOn attribute.
- B. Use the Fn::If intrinsic function to check for the EC2 instance before the custom resource runs.
- C. Update the Lambda function to use the cfn-response module to send a response to the custom resource.
- D. Update the custom resource's service token to point to a valid Lambda function.
Answer: A
Explanation:
The AWS Cloud Operations and Infrastructure-as-Code documentation specifies that when using AWS CloudFormation, resources are created in parallel by default unless explicitly ordered using DependsOn.
If a custom resource (Lambda) depends on another resource (like an EC2 instance) to exist before execution, a DependsOn attribute must be added to enforce creation order. This ensures the EC2 instance is launched and available before the custom resource executes its automation logic.
Updating the service token (Option B) doesn't affect order of execution. The cfn-response module (Option C) handles callback communication but not sequencing. Fn::If (Option D) is for conditional creation, not dependency control.
Therefore, Option A is correct - adding a DependsOn attribute guarantees that CloudFormation provisions the EC2 instance before executing the Lambda custom resource.
NEW QUESTION # 78
A CloudOps engineer needs to ensure that AWS resources across multiple AWS accounts are tagged consistently. The company uses an organization in AWS Organizations to centrally manage the accounts. The company wants to implement cost allocation tags to accurately track the costs that are allocated to each business unit.
Which solution will meet these requirements with the LEAST operational overhead?
- A. Use AWS Service Catalog to provision only pre-tagged resources. Use AWS Trusted Advisor to enforce tagging across the organization.
- B. Configure AWS CloudTrail events to invoke an AWS Lambda function to detect untagged resources and to automatically assign tags based on predefined rules.
- C. Use AWS Config to evaluate tagging compliance. Use AWS Budgets to apply tags for cost allocation.
- D. Use Organizations tag policies to enforce mandatory tagging on all resources. Enable cost allocation tags in the AWS Billing and Cost Management console.
Answer: D
Explanation:
Tagging is essential for governance, cost management, and automation in CloudOps operations. The AWS Organizations tag policies feature allows centralized definition and enforcement of required tag keys and accepted values across all accounts in an organization. According to the AWS CloudOps study guide under Deployment, Provisioning, and Automation, tag policies enable automatic validation of tags, ensuring consistency with minimal manual overhead.
Once tagging consistency is enforced, enabling cost allocation tags in the AWS Billing and Cost Management console allows accurate cost distribution per business unit. AWS documentation states:
"Use AWS Organizations tag policies to standardize tags across accounts. You can activate cost allocation tags in the Billing console to track and allocate costs." Option B introduces unnecessary complexity with Lambda automation. Option C detects but does not enforce tagging. Option D limits flexibility to Service Catalog resources only. Therefore, Option A provides a centrally managed, automated, and low-overhead solution that meets CloudOps tagging and cost-tracking requirements.
References (AWS CloudOps Documents / Study Guide):
* AWS Certified CloudOps Engineer - Associate (SOA-C03) Exam Guide - Domain 3: Deployment, Provisioning and Automation
* AWS Organizations - Tag Policies
* AWS Billing and Cost Management - Cost Allocation Tags
* AWS Well-Architected Framework - Operational Excellence and Cost Optimization Pillars
NEW QUESTION # 79
A company runs a high performance computing (HPC) data-processing application on Amazon EC2 instances in one Availability Zone within a development environment. The application uses a dataset that the company stores on an Amazon S3 general purpose bucket in the same AWS Region as the EC2 instances.
A SysOps administrator must improve the application's performance for retrieval of objects from Amazon S3.
Which solution will meet these requirements?
- A. Create a second general purpose S3 bucket in the same Region. Copy the objects from the original bucket to the new bucket. Use the S3 Express One Zone storage class to store the objects in the new bucket. Update the application to use an S3 Regional endpoint.
- B. Enable S3 Transfer Acceleration for the S3 bucket. Create an S3 access point for the bucket. Update the application to use the access point.
- C. Create an S3 directory bucket in the same Availability Zone. Import objects from the original bucket to the new bucket. Use the S3 Express One Zone storage class to store the objects in the new bucket.Update the application to use an S3 Zonal endpoint.
- D. Create an S3 Lifecycle configuration for the S3 bucket to move all objects to the S3 Express One Zone storage class. Update the application to use an S3 Regional endpoint.
Answer: C
Explanation:
Comprehensive and Detailed Explanation From Exact Extract of AWS CloudOps Documents:
The correct answer is D because Amazon S3 Express One Zone with directory buckets and zonal endpoints is specifically designed for single-Availability Zone, high-performance workloads such as HPC, machine learning, and analytics applications running on Amazon EC2. AWS CloudOps documentation states that S3 Express One Zone delivers single-digit millisecond latency and up to 10x higher request performance compared to general purpose S3 buckets when data is accessed from the same Availability Zone.
An S3 directory bucket is required to use the S3 Express One Zone storage class. These buckets are explicitly associated with a single Availability Zone and use zonal endpoints, which eliminate cross-AZ network hops and significantly reduce latency. Importing the data from the existing general purpose bucket ensures compatibility while achieving maximum throughput and lowest latency.
Option A is incorrect because S3 Transfer Acceleration is optimized for long-distance, internet-based transfers, not for in-Region HPC workloads. Option B is incorrect because lifecycle policies cannot move objects into S3 Express One Zone, and S3 Express One Zone does not use Regional endpoints. Option C is incorrect because general purpose buckets do not support zonal endpoints and therefore cannot achieve the same performance benefits.
AWS CloudOps performance optimization guidance clearly identifies S3 directory buckets with S3 Express One Zone and zonal endpoints as the optimal architecture for high-throughput, low-latency workloads in a single Availability Zone.
References:
Amazon S3 User Guide - S3 Express One Zone and Directory Buckets
AWS SysOps Administrator Study Guide - Storage Performance Optimization AWS Well-Architected Framework - Performance Efficiency Pillar
NEW QUESTION # 80
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