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| Section | Weight | Objectives |
|---|---|---|
| Topic 1: Networking and Content Delivery | 18% | - Implement network security and troubleshooting
|
| Topic 2: Deployment, Provisioning, and Automation | 22% | - Manage configuration and secrets
|
| Topic 3: Monitoring, Logging, Analysis, Remediation, and Performance Optimization | 22% | - Implement remediation actions based on monitoring and logging data
|
| Topic 4: Reliability and Business Continuity | 22% | - Implement high availability and fault tolerance
|
| Topic 5: Security and Compliance | 16% | - Implement data protection
|
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NEW QUESTION # 120
A company hosts a static website on an Amazon S3 bucket behind an Amazon CloudFront distribution. When the company deploys a new version of the website, users sometimes do not see the new content until the next day.
A CloudOps engineer must implement a solution to display updates to the website as quickly as possible.
Which solution will meet this requirement?
Answer: A
Explanation:
CloudFront caches content at edge locations to reduce origin requests and improve performance. When a static website is updated by overwriting existing object keys (for example, updating index.html in the same S3 path), CloudFront may continue to serve the cached versions of those objects until the cache's time-to-live (TTL) expires. This behavior commonly produces a delay where some viewers still receive the old site version, sometimes for many hours, depending on the configured TTLs and any cache headers that CloudFront is honoring.
A CloudFront invalidation (Option D) is designed to address exactly this situation: it removes cached objects from CloudFront edge caches so that the next request for those objects forces CloudFront to retrieve the latest versions from the S3 origin and cache them again. By invalidating key objects such as /index.html (and potentially additional paths if needed), the company can ensure users see the newest deployment quickly without waiting for TTL expiration.
Option A is not the best answer because "adding a Cache-Control header to requests" does not immediately clear content already cached at edge locations; it primarily influences caching behavior for future fetches and can still leave existing cached objects in place until they expire. Option B only enforces HTTPS and does not affect cache freshness or object replacement visibility. Option C (CachingOptimized) is intended to improve caching efficiency and performance for typical workloads; it does not provide immediate propagation of updated objects and can result in CloudFront serving cached responses until TTLs expire.
Therefore, the most direct solution to display the updated website as quickly as possible is to create a CloudFront invalidation.
NEW QUESTION # 121
A CloudOps engineer is troubleshooting an implementation of Amazon CloudWatch Synthetics. The CloudWatch Synthetics results must be sent to an Amazon S3 bucket.
The CloudOps engineer has copied the configuration of an existing canary that runs on a VPC that has an internet gateway attached. However, the CloudOps engineer cannot get the canary to successfully start on a private VPC that has no internet access.
What should the CloudOps engineer do to successfully run the canary on the private VPC?
Answer: A
Explanation:
Comprehensive Explanation (250-350 words):
CloudWatch Synthetics canaries require connectivity to both CloudWatch and Amazon S3 to function correctly. In a private VPC without internet access, AWS service access must be provided through VPC endpoints.
The canary needs to send metrics, logs, and execution data to CloudWatch, which requires an interface VPC endpoint for CloudWatch. It also needs to store artifacts such as screenshots and HAR files in Amazon S3, which requires a gateway VPC endpoint for S3. Without these endpoints, the canary cannot communicate with required AWS services and will fail to start.
DNS resolution and DNS hostnames must be enabled so the canary can resolve AWS service endpoints to the private IP addresses exposed by the VPC endpoints. This is a mandatory prerequisite for PrivateLink-based service access.
Option B and C incorrectly disable DNS functionality, which breaks service endpoint resolution. Option A includes invalid or irrelevant permissions and does not address private connectivity requirements.
Therefore, enabling DNS support and creating both the CloudWatch interface endpoint and the S3 gateway endpoint is the correct and complete solution.
NEW QUESTION # 122
A company uses AWS Systems Manager to automate common operational tasks across its AWS resources. The company wants to automatically collect software inventory of all its Amazon EC2 instances every day. The solution must store the data in an Amazon S3 bucket for auditing purposes. Which solution will meet these requirements?
Answer: A
Explanation:
Systems Manager Inventory is configured through State Manager associations that run inventory collection documents such as AWS-GatherSoftwareInventory. AWS documentation states that configuring inventory collection starts by creating a Systems Manager State Manager association, and Systems Manager collects inventory data when the association runs. Inventory data can be synchronized to an Amazon S3 bucket for auditing and reporting. This directly meets the requirement to collect software inventory every day and store the results in S3. Distributor packages and distributes software; it is not the primary inventory collection mechanism. Patch Manager manages patching, not daily software inventory exports. Session Manager and Fleet Manager are useful for access and fleet visibility but do not provide the scheduled inventory-to-S3 workflow. Therefore, a scheduled Systems Manager association is correct.
NEW QUESTION # 123
Application A runs on Amazon EC2 instances behind a Network Load Balancer (NLB). The EC2 instances are in an Auto Scaling group and are in the same subnet that is associated with the NLB. Other applications from an on-premises environment cannot communicate with Application A on port 8080.
To troubleshoot the issue, a CloudOps engineer analyzes the flow logs. The flow logs include the following records:
ACCEPT from 192.168.0.13:59003 → 172.31.16.139:8080
REJECT from 172.31.16.139:8080 → 192.168.0.13:59003
What is the reason for the rejected traffic?
Answer: B
Explanation:
Comprehensive and Detailed Explanation From Exact Extract of AWS CloudOps Doocuments:
VPC Flow Logs show the request arriving and being ACCEPTed on dstport 8080 and the corresponding response being REJECTed on the return path to the client's ephemeral port (59003). AWS networking guidance states that security groups are stateful (return traffic is automatically allowed) while network ACLs are stateless and require explicit inbound and outbound rules for both directions. CloudOps operational guidance for VPC networking further notes that when you allow an inbound request (for example, TCP 8080) through a subnet's network ACL, you must also allow the outbound ephemeral port range (typically 1024-65535) for the response traffic; otherwise, the return packets are dropped and appear as REJECT in flow logs. The observed pattern-request accepted to 8080, response rejected to 59003-matches a missing outbound ephemeral-range allow on the subnet's NACL. Therefore, the cause is the subnet NACL, not security groups or on-premises ACLs. The remediation is to add an outbound ALLOW rule on the NACL for the appropriate ephemeral TCP port range back to the on-premises CIDR (and the corresponding inbound rule if asymmetric).
References (AWS CloudOps documents / Study Guide):
* AWS Certified CloudOps Engineer - Associate (SOA-C03) Exam Guide - Networking and Content Delivery
* Amazon VPC - Network ACLs (stateless behavior and rule requirements)
* Amazon VPC - Security Groups (stateful return traffic)
* VPC Flow Logs - Record fields, ACCEPT/REJECT analysis
NEW QUESTION # 124
A CloudOps engineer has successfully deployed a VPC with an AWS CloudFormation template. The CloudOps engineer wants to deploy the same template across multiple accounts that are managed through AWS Organizations.
Which solution will meet this requirement with the LEAST operational overhead?
Answer: A
Explanation:
Comprehensive Explanation (250-350 words):
CloudFormation StackSets are designed specifically to deploy and manage the same CloudFormation stack across multiple AWS accounts and Regions from a centralized administration point. When accounts are managed under AWS Organizations, StackSets can integrate directly with Organizations to target Organizational Units (OUs) or specific accounts, which minimizes operational overhead. This removes the need to manually assume roles and deploy stacks one-by-one, and avoids building custom automation (Lambda + cross-account role assumption + account enumeration + error handling + retries + idempotency).
With StackSets, you define the template once and then create stack instances across many accounts in a controlled and consistent manner. StackSets provide built-in features for: (1) centralized rollout and updates, (2) drift detection, (3) automatic deployment to new accounts (when using Organizations integration), and (4) standardized execution roles. This is operationally simpler and safer than scripting because StackSets handle orchestration and track deployment state per account/Region.
Option A increases manual work and is error-prone at scale. Options B and C require custom Lambda orchestration, cross-account permissions, and ongoing maintenance for failure modes and change management. StackSets provide the native "least ops" approach to multi-account CloudFormation deployments under Organizations.
NEW QUESTION # 125
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