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AWS Certified DevOps Engineer - Professional DOP-C02 Practice Test 27

Question 260

An infrastructure release may replace a stateful database resource but reviewers see only a template diff before production execution.

Which action best meets the technical requirement?

  1. Use an AWS SAM template and supported transforms to define reusable serverless resources and events through CloudFormation.
  2. Create and inspect a CloudFormation change set with replacement details and require approval before executing it.
  3. Set appropriate DeletionPolicy or UpdateReplacePolicy attributes on critical stateful resources and validate replacement behavior.
  4. Synthesize the CDK app and scan the resulting CloudFormation template and asset manifests before deployment.

Explanation

Correct Answer

B:

Create and inspect a CloudFormation change set with replacement details and require approval before executing it. A change set previews intended stack resource actions including potential replacements, reducing surprise when modifying infrastructure. The relevant operational proof is specific: The reviewed change set identifies whether the database will be modified or replaced and is executed only after risk acceptance.

Incorrect Answers

A:

Use an AWS SAM template and supported transforms to define reusable serverless resources and events through CloudFormation. That would address sam serverless templates, because sAM provides shorthand definitions for supported serverless workloads while the generated resources follow normal stack lifecycle controls. However, the stated situation instead concerns cloudformation change sets. A change set previews intended stack resource actions including potential replacements, reducing surprise when modifying infrastructure.

C:

Set appropriate DeletionPolicy or UpdateReplacePolicy attributes on critical stateful resources and validate replacement behavior. That would address cloudformation deletion protections, because cloudFormation resource policies can retain or snapshot supported resources when stack deletion or replacement occurs, reducing accidental loss. However, the stated situation instead concerns cloudformation change sets. A change set previews intended stack resource actions including potential replacements, reducing surprise when modifying infrastructure.

D:

Synthesize the CDK app and scan the resulting CloudFormation template and asset manifests before deployment. That would address cdk synthesis review, because cDK is an authoring abstraction that produces deployable CloudFormation templates; security review must consider the synthesized resources. However, the stated situation instead concerns cloudformation change sets. A change set previews intended stack resource actions including potential replacements, reducing surprise when modifying infrastructure.

Question 261

Investigators need network metadata for anomalous outbound traffic from a compromised subnet but have no collection enabled for VPC traffic.

Why is the recommended approach appropriate to this scenario?

  1. S3 object operations require data-event coverage rather than assuming general management trails capture every object write.
  2. Flow logs capture network-flow metadata such as source, destination, ports and action for supported traffic, not full application payloads.
  3. GuardDuty analyzes supported AWS signals for suspicious behavior that ordinary availability metrics do not reveal.
  4. Access Analyzer applies policy analysis to detect external principals reachable through resource-based policies beyond the defined trust boundary.

Explanation

Correct Answer

B:

Flow logs capture network-flow metadata such as source, destination, ports and action for supported traffic, not full application payloads. This explains the implementation decision: Enable VPC Flow Logs on relevant VPCs or interfaces with protected destinations and an analysis approach. Verification should show the following: An approved test connection creates the expected flow metadata for the source interface and time window.

Incorrect Answers

A:

S3 object operations require data-event coverage rather than assuming general management trails capture every object write. This reasoning supports the alternative topic of s3 change audit data events, for which the relevant intervention is: Enable appropriately scoped S3 CloudTrail data events for the protected resources and correlate PutObject or DeleteObject actors with alerts. The scenario requires understanding vpc flow logs detection, where flow logs capture network-flow metadata such as source, destination, ports and action for supported traffic, not full application payloads.

C:

GuardDuty analyzes supported AWS signals for suspicious behavior that ordinary availability metrics do not reveal. This reasoning supports the alternative topic of guardduty compromise indicators, for which the relevant intervention is: Review GuardDuty threat-detection findings and the supporting flow or DNS telemetry before selecting containment actions. The scenario requires understanding vpc flow logs detection, where flow logs capture network-flow metadata such as source, destination, ports and action for supported traffic, not full application payloads.

D:

Access Analyzer applies policy analysis to detect external principals reachable through resource-based policies beyond the defined trust boundary. This reasoning supports the alternative topic of iam access analyzer external access, for which the relevant intervention is: Enable IAM Access Analyzer for a suitable zone of trust and review supported external-access findings regularly. The scenario requires understanding vpc flow logs detection, where flow logs capture network-flow metadata such as source, destination, ports and action for supported traffic, not full application payloads.

Question 262

An administrator executes a destructive SQL operation at noon and needs a database restored to the last safe point before the mistake.

What outcome would best demonstrate the danger of retaining the current design?

  1. Treating pilot light as instant active-active failover leads to unrealistic restoration promises and missed recovery deadlines.
  2. Restoring the latest snapshot without considering its age may lose many hours of valid transactions.
  3. Keeping only templates and backups may require provisioning time longer than the business's minute-level RTO.
  4. Untested runbooks often hide missing permissions or dependencies that surface only during a live disaster.

Explanation

Correct Answer

B:

Restoring the latest snapshot without considering its age may lose many hours of valid transactions. This outcome arises from the mechanism in the situation: PITR uses managed backups and transaction logs to recover to a chosen time in the retention window rather than only to fixed snapshot times. The corresponding mitigation is: Use RDS automated backups and point-in-time recovery to create a new instance from an eligible timestamp, then plan controlled cutover.

Incorrect Answers

A:

Treating pilot light as instant active-active failover leads to unrealistic restoration promises and missed recovery deadlines. That is a credible concern for pilot light tradeoff, normally addressed by: Keep critical state and minimal core services replicated in a pilot-light Region and automate scale-out during a disaster. It is not the primary failure mechanism described here. The relevant exposure is: Restoring the latest snapshot without considering its age may lose many hours of valid transactions.

C:

Keeping only templates and backups may require provisioning time longer than the business's minute-level RTO. That is a credible concern for warm standby recovery, normally addressed by: Maintain a reduced-capacity warm standby with replicated data and automation to scale it during failover. It is not the primary failure mechanism described here. The relevant exposure is: Restoring the latest snapshot without considering its age may lose many hours of valid transactions.

D:

Untested runbooks often hide missing permissions or dependencies that surface only during a live disaster. That is a credible concern for recovery runbook validation, normally addressed by: Automate and regularly perform recovery game days that verify resource, data and application restoration against business targets. It is not the primary failure mechanism described here. The relevant exposure is: Restoring the latest snapshot without considering its age may lose many hours of valid transactions.

Question 263

A Lambda application repeatedly exceeds its error-rate threshold but the team learns about the issue only from users.

Which validation result offers the strongest acceptance evidence?

  1. A noncompliant test rule is corrected automatically, while required business exceptions remain governed and auditable.
  2. A sustained simulated error rate changes the alarm to ALARM and the on-call target receives a linked notification.
  3. An applicable planned maintenance notice reaches the mapped owner with service and resource context before the event window.
  4. A test or eligible failure invokes the recovery path and the instance returns to passing system status checks.

Explanation

Correct Answer

B:

A sustained simulated error rate changes the alarm to ALARM and the on-call target receives a linked notification. It directly verifies the change: Create a CloudWatch alarm on a meaningful error-rate metric and connect its ALARM state to an SNS notification or approved response workflow. The test matters because cloudWatch alarm state evaluates metric conditions over periods and can invoke downstream notification or remediation actions.

Incorrect Answers

A:

A noncompliant test rule is corrected automatically, while required business exceptions remain governed and auditable. That result would help prove config rule auto remediation, where the relevant action is: Use a Config rule with scoped Systems Manager Automation remediation for the specific unauthorized ingress condition. It does not establish this case's required outcome. For cloudwatch alarm actions, the decisive verification is: A sustained simulated error rate changes the alarm to ALARM and the on-call target receives a linked notification.

C:

An applicable planned maintenance notice reaches the mapped owner with service and resource context before the event window. That result would help prove health event operations, where the relevant action is: Send relevant AWS Health events through EventBridge to owner-specific notification and operations workflows. It does not establish this case's required outcome. For cloudwatch alarm actions, the decisive verification is: A sustained simulated error rate changes the alarm to ALARM and the on-call target receives a linked notification.

D:

A test or eligible failure invokes the recovery path and the instance returns to passing system status checks. That result would help prove auto recovery ec2 status, where the relevant action is: Configure a CloudWatch system status-check alarm with supported EC2 recovery action after validating instance eligibility. It does not establish this case's required outcome. For cloudwatch alarm actions, the decisive verification is: A sustained simulated error rate changes the alarm to ALARM and the on-call target receives a linked notification.

Question 264

Security needs immediate notification when an IAM policy is updated, but analysts currently inspect CloudTrail only at the end of each week.

Which action best meets the technical requirement?

  1. Publish one structured incident event to an SNS topic with appropriate independent subscriptions or downstream queue consumers.
  2. Use EventBridge rules for relevant CloudTrail API events and route approved matches into a security notification or response workflow.
  3. Use a Step Functions workflow with explicit branches, task-level retries and approval-dependent transitions.
  4. Configure an appropriate SQS redrive policy to a dead-letter queue and investigate messages that exceed the retry threshold.

Explanation

Correct Answer

B:

Use EventBridge rules for relevant CloudTrail API events and route approved matches into a security notification or response workflow. CloudTrail management events can be matched through EventBridge to produce timely automated actions with principal and operation context. The relevant operational proof is specific: A controlled IAM policy update generates the expected alert identifying account, role, API call and time.

Incorrect Answers

A:

Publish one structured incident event to an SNS topic with appropriate independent subscriptions or downstream queue consumers. That would address sns fanout to teams, because sNS fanout distributes one notification to multiple subscribed destinations without requiring the producing system to address each recipient separately. However, the stated situation instead concerns cloudtrail privileged change event. CloudTrail management events can be matched through EventBridge to produce timely automated actions with principal and operation context.

C:

Use a Step Functions workflow with explicit branches, task-level retries and approval-dependent transitions. That would address step functions incident orchestration, because a state machine makes multistep event response visible and handles human or service dependencies more reliably than one opaque handler. However, the stated situation instead concerns cloudtrail privileged change event. CloudTrail management events can be matched through EventBridge to produce timely automated actions with principal and operation context.

D:

Configure an appropriate SQS redrive policy to a dead-letter queue and investigate messages that exceed the retry threshold. That would address sqs dead letter handling, because dead-letter queues isolate repeatedly failing messages, allowing a controlled diagnostic path without losing the original payload. However, the stated situation instead concerns cloudtrail privileged change event. CloudTrail management events can be matched through EventBridge to produce timely automated actions with principal and operation context.

Question 265

A single all-or-nothing pipeline deploys unrelated microservices together and a broken service forces rollback of every component.

Which failure mode should the DevOps engineer prioritize?

  1. Persistent undocumented build-server state can alter artifacts and leak deployment credentials between unrelated builds.
  2. A monolithic deployment pipeline turns one small defect into unnecessary organization-wide service disruption.
  3. A missing regional artifact store or key permission stops deployment after approval, leaving Regions on inconsistent releases.
  4. A committed password remains exposed in cloned repositories and cannot be safely rotated by editing only the build stage.

Explanation

Correct Answer

B:

A monolithic deployment pipeline turns one small defect into unnecessary organization-wide service disruption. This outcome arises from the mechanism in the situation: Separating release units reduces blast radius when services have independent artifacts and release cadence, while contract tests still guard shared interfaces. The corresponding mitigation is: Split independently deployable services into appropriately isolated pipelines with explicit dependency checks at integration boundaries.

Incorrect Answers

A:

Persistent undocumented build-server state can alter artifacts and leak deployment credentials between unrelated builds. That is a credible concern for build isolation and reproducibility, normally addressed by: Run CodeBuild jobs in defined ephemeral build environments with pinned dependency versions and protected service-role permissions. It is not the primary failure mechanism described here. The relevant exposure is: A monolithic deployment pipeline turns one small defect into unnecessary organization-wide service disruption.

C:

A missing regional artifact store or key permission stops deployment after approval, leaving Regions on inconsistent releases. That is a credible concern for multi-region pipeline artifacts, normally addressed by: Configure a separate encrypted pipeline artifact bucket in each action Region and grant the required cross-Region access. It is not the primary failure mechanism described here. The relevant exposure is: A monolithic deployment pipeline turns one small defect into unnecessary organization-wide service disruption.

D:

A committed password remains exposed in cloned repositories and cannot be safely rotated by editing only the build stage. That is a credible concern for pipeline secret retrieval, normally addressed by: Reference Secrets Manager or encrypted Systems Manager Parameter Store values at runtime under a scoped build role rather than embedding secret values in source. It is not the primary failure mechanism described here. The relevant exposure is: A monolithic deployment pipeline turns one small defect into unnecessary organization-wide service disruption.

Question 266

An administrator applies an AWS Organizations service control policy intended to give developers S3 access, but their IAM roles still deny requests.

Which solution should the DevOps engineer implement?

  1. Register supported delegated administrator accounts for applicable organization-level security services and minimize management-account use.
  2. Use SCPs as organization-level maximum-permission guardrails and grant necessary actions separately in identity or resource policies.
  3. Create an organization-level multi-Region CloudTrail trail with protected centralized log storage and appropriate ownership.
  4. Configure an AWS Config aggregator with the required organization and Region coverage and centrally review aggregated compliance.

Explanation

Correct Answer

B:

Use SCPs as organization-level maximum-permission guardrails and grant necessary actions separately in identity or resource policies. An SCP restricts permissions available to principals in affected member accounts; it does not itself grant an IAM permission. The relevant operational proof is specific: A principal succeeds only when IAM permits the request and no applicable SCP explicitly or implicitly blocks the operation.

Incorrect Answers

A:

Register supported delegated administrator accounts for applicable organization-level security services and minimize management-account use. That would address delegated administration control, because delegated administration separates operational service management from the powerful organizations management account, limiting credential exposure. However, the stated situation instead concerns scp permission guardrail. An SCP restricts permissions available to principals in affected member accounts; it does not itself grant an IAM permission.

C:

Create an organization-level multi-Region CloudTrail trail with protected centralized log storage and appropriate ownership. That would address organization trail audit scope, because an organization trail expands management-event coverage to member accounts and supports consolidated immutable audit operations. However, the stated situation instead concerns scp permission guardrail. An SCP restricts permissions available to principals in affected member accounts; it does not itself grant an IAM permission.

D:

Configure an AWS Config aggregator with the required organization and Region coverage and centrally review aggregated compliance. That would address multiaccount config aggregation, because an aggregator consolidates AWS Config resource and compliance views, but source accounts must have suitable recorders and rules. However, the stated situation instead concerns scp permission guardrail. An SCP restricts permissions available to principals in affected member accounts; it does not itself grant an IAM permission.

Question 267

A security team owns thousands of S3 buckets and cannot identify where accidental customer identifiers are stored.

Which AWS operational change most directly resolves the stated problem?

  1. Enable appropriate S3 Block Public Access settings at account or bucket scope and provide a separate approved public-content pattern.
  2. Use Amazon Macie sensitive-data discovery jobs with appropriate scope and permissions and investigate findings.
  3. Aggregate and normalize findings through AWS Security Hub with delegated administration and clear response ownership.
  4. Use an eligible AWS Certificate Manager managed certificate and validate DNS ownership and listener association.

Explanation

Correct Answer

B:

Use Amazon Macie sensitive-data discovery jobs with appropriate scope and permissions and investigate findings. Macie analyzes selected S3 data to detect classes of sensitive content and highlights unexpected storage locations. The relevant operational proof is specific: A seeded test object containing protected identifiers generates a finding and its owning team receives an appropriate remediation task.

Incorrect Answers

A:

Enable appropriate S3 Block Public Access settings at account or bucket scope and provide a separate approved public-content pattern. That would address s3 public access guardrail, because block Public Access controls override many accidental public policy or ACL settings, reducing exposure of private object stores. However, the stated situation instead concerns macie sensitive data discovery. Macie analyzes selected S3 data to detect classes of sensitive content and highlights unexpected storage locations.

C:

Aggregate and normalize findings through AWS Security Hub with delegated administration and clear response ownership. That would address security hub aggregated posture, because security Hub unifies supported security findings and standards checks, improving cross-account triage and control visibility. However, the stated situation instead concerns macie sensitive data discovery. Macie analyzes selected S3 data to detect classes of sensitive content and highlights unexpected storage locations.

D:

Use an eligible AWS Certificate Manager managed certificate and validate DNS ownership and listener association. That would address acm certificate lifecycle, because aCM can automate supported public certificate renewals when domain validation and service integration remain valid. However, the stated situation instead concerns macie sensitive data discovery. Macie analyzes selected S3 data to detect classes of sensitive content and highlights unexpected storage locations.

Question 268

Async workers process a varying number of long-running queue messages, while EC2 CPU stays low despite growing customer wait time.

Which consequence is most specific to the observed weakness?

  1. Adding cluster nodes alone leaves the original pod count saturated and customer latency unchanged.
  2. Undersized fixed capacity causes failed writes while overprovisioned capacity wastes resources during low usage.
  3. Unbounded Lambda fan-out exhausts database connections and turns a recoverable backlog into widespread failures.
  4. CPU-only scaling misses queue starvation and lets customer tasks wait indefinitely despite healthy server utilization.

Explanation

Correct Answer

D:

CPU-only scaling misses queue starvation and lets customer tasks wait indefinitely despite healthy server utilization. This outcome arises from the mechanism in the situation: Queue depth normalized by available consumers better represents work outstanding than host CPU for I/O-bound tasks. The corresponding mitigation is: Scale consumers using a CloudWatch backlog-per-instance metric and processing-time-aware target instead of CPU alone.

Incorrect Answers

A:

Adding cluster nodes alone leaves the original pod count saturated and customer latency unchanged. That is a credible concern for eks horizontal pod autoscaling, normally addressed by: Configure Horizontal Pod Autoscaler against suitable resource or custom metrics and ensure node capacity can support the desired replicas. It is not the primary failure mechanism described here. The relevant exposure is: CPU-only scaling misses queue starvation and lets customer tasks wait indefinitely despite healthy server utilization.

B:

Undersized fixed capacity causes failed writes while overprovisioned capacity wastes resources during low usage. That is a credible concern for dynamodb on demand capacity, normally addressed by: Select appropriate on-demand capacity or autoscaled provisioned throughput and monitor throttling and cost boundaries. It is not the primary failure mechanism described here. The relevant exposure is: CPU-only scaling misses queue starvation and lets customer tasks wait indefinitely despite healthy server utilization.

C:

Unbounded Lambda fan-out exhausts database connections and turns a recoverable backlog into widespread failures. That is a credible concern for lambda concurrency protection, normally addressed by: Set an appropriate maximum event-source concurrency or reserved concurrency and coordinate queue retries with database capacity. It is not the primary failure mechanism described here. The relevant exposure is: CPU-only scaling misses queue starvation and lets customer tasks wait indefinitely despite healthy server utilization.

Question 269

A security team enables CloudTrail management events and assumes it will automatically capture every S3 object-level GetObject or PutObject call.

Which AWS operational change most directly resolves the stated problem?

  1. Enable appropriately scoped CloudTrail S3 data event recording for the required buckets while managing cost and data sensitivity.
  2. Monitor ALB HTTPCode_Target_5XX_Count or rate with request volume context and correlate errors to target-group health.
  3. Review AWS Config configuration history and rule evaluation results for the bucket across the relevant period.
  4. Instrument supported request paths for AWS X-Ray traces and inspect segments to isolate high-latency dependencies.

Explanation

Correct Answer

A:

Enable appropriately scoped CloudTrail S3 data event recording for the required buckets while managing cost and data sensitivity. Object-level data events are separately configurable from management events and require intentional scope selection. The relevant operational proof is specific: A test object read and write generates the expected S3 data events for the monitored bucket.

Incorrect Answers

B:

Monitor ALB HTTPCode_Target_5XX_Count or rate with request volume context and correlate errors to target-group health. That would address alb error signal, because target 5xx metrics distinguish backend response failures from load balancer-generated errors, providing a more direct application signal. However, the stated situation instead concerns cloudtrail data events. Object-level data events are separately configurable from management events and require intentional scope selection.

C:

Review AWS Config configuration history and rule evaluation results for the bucket across the relevant period. That would address config compliance timeline, because aWS Config records supported resource configuration changes and compliance state over time, complementing CloudTrail actor records. However, the stated situation instead concerns cloudtrail data events. Object-level data events are separately configurable from management events and require intentional scope selection.

D:

Instrument supported request paths for AWS X-Ray traces and inspect segments to isolate high-latency dependencies. That would address x ray trace latency, because distributed traces provide per-service latency context that aggregate endpoint duration cannot identify. However, the stated situation instead concerns cloudtrail data events. Object-level data events are separately configurable from management events and require intentional scope selection.

Question 270

AWS Config detects a prohibited 0.0.0.0/0 inbound SSH rule, but security staff repeatedly remove the same exposure by hand.

Which consequence is most specific to the observed weakness?

  1. Manual daily scaling allows important queued work to exceed its processing deadline during sudden load changes.
  2. Manual global configuration edits make it difficult to identify or reverse the exact setting that caused an outage.
  3. A lack of automatic correction allows easily reintroduced network exposure to persist between security reviews.
  4. Overbroad or slow isolation either leaves malicious traffic active or disconnects innocent production systems.

Explanation

Correct Answer

C:

A lack of automatic correction allows easily reintroduced network exposure to persist between security reviews. This outcome arises from the mechanism in the situation: A Config evaluation identifies the noncompliant resource state and an authorized automation can restore the expected ingress policy. The corresponding mitigation is: Attach a narrowly scoped Systems Manager Automation remediation to the relevant Config rule with controlled exception handling.

Incorrect Answers

A:

Manual daily scaling allows important queued work to exceed its processing deadline during sudden load changes. That is a credible concern for auto scale on sqs backlog, normally addressed by: Use suitable CloudWatch backlog metrics to drive an Auto Scaling policy for the processing fleet with bounded capacity. It is not the primary failure mechanism described here. The relevant exposure is: A lack of automatic correction allows easily reintroduced network exposure to persist between security reviews.

B:

Manual global configuration edits make it difficult to identify or reverse the exact setting that caused an outage. That is a credible concern for parameter change rollback, normally addressed by: Associate the rollout with meaningful CloudWatch health alarms and automatic configuration rollback rather than restarting every service manually. It is not the primary failure mechanism described here. The relevant exposure is: A lack of automatic correction allows easily reintroduced network exposure to persist between security reviews.

D:

Overbroad or slow isolation either leaves malicious traffic active or disconnects innocent production systems. That is a credible concern for automated isolation of compromised instance, normally addressed by: Trigger a guarded event workflow that applies a preapproved quarantine security group after checking finding type and resource identity. It is not the primary failure mechanism described here. The relevant exposure is: A lack of automatic correction allows easily reintroduced network exposure to persist between security reviews.

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