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DevNet Associate (DEVASC) 200-901 Practice Test 48

Question 470

The initial implementation fails or does not meet the expected behavior. A local API container listens on port 8080 but docker run -p 8080:9000 makes the host endpoint unavailable. Which investigation should be prioritized to diagnose the problem?

  1. Inspect image history, Dockerfile instructions and container process after docker run.
  2. Inspect container exposed/listening ports, docker ps port mapping and curl response.
  3. Inspect query construction, parameter bindings and controlled injection tests.
  4. Compare CI artifact digest, registry manifest and deployed workload image reference.

Explanation

Correct Answer

B:

Inspect container exposed/listening ports, docker ps port mapping and curl response. These are the relevant initial evidence checks for Map container host port correctly. Intended action: Publish the correct host-to-container port mapping such as -p 9000:8080 and verify the bound app interface. Expected success condition: A GET to localhost:9000 reaches the service listening on container port 8080.

Incorrect Answers

A:

Inspect image history, Dockerfile instructions and container process after docker run. This investigation primarily applies to Dockerfile CMD versus RUN, not the current Map container host port correctly problem. Prioritize: Inspect container exposed/listening ports, docker ps port mapping and curl response.

C:

Inspect query construction, parameter bindings and controlled injection tests. This investigation primarily applies to Parameterized SQL blocks injection, not the current Map container host port correctly problem. Prioritize: Inspect container exposed/listening ports, docker ps port mapping and curl response.

D:

Compare CI artifact digest, registry manifest and deployed workload image reference. This investigation primarily applies to Artifact promotion instead of rebuild drift, not the current Map container host port correctly problem. Prioritize: Inspect container exposed/listening ports, docker ps port mapping and curl response.

Question 471

A Cisco network automation team has this requirement: A Dockerfile stores a live API token in ENV and the container image is pushed to an organization-wide registry. Which design or implementation action best addresses it?

  1. Evaluate an approved bare-metal deployment with the required NIC driver, OS and isolation controls.
  2. Remove embedded secrets, rotate the exposed token, and inject scoped runtime secrets through an approved manager.
  3. Conduct a blameless post-incident review and implement test, review and rollback safeguards in the delivery workflow.
  4. Create a unittest.TestCase method using self.assertEqual(normalize('guest'),'GUEST').

Explanation

Correct Answer

B:

Remove embedded secrets, rotate the exposed token, and inject scoped runtime secrets through an approved manager. Technical reason: Build layers and image metadata can persist values even after later instructions remove files. Verify by: Image inspection reveals no token and the running service authenticates using its injected secret. Deployment qualification: Environment injection may still expose secrets to privileged local diagnostics and requires access controls.

Incorrect Answers

A:

Evaluate an approved bare-metal deployment with the required NIC driver, OS and isolation controls. This instead targets the different case Bare metal for specialized packet processing. The described Move secrets out of Docker layers requirement specifically calls for Remove embedded secrets, rotate the exposed token, and inject scoped runtime secrets through an approved manager.

C:

Conduct a blameless post-incident review and implement test, review and rollback safeguards in the delivery workflow. This instead targets the different case Blameless incident review and feedback. The described Move secrets out of Docker layers requirement specifically calls for Remove embedded secrets, rotate the exposed token, and inject scoped runtime secrets through an approved manager.

D:

Create a unittest.TestCase method using self.assertEqual(normalize('guest'),'GUEST'). This instead targets the different case Python unittest test-case assertion. The described Move secrets out of Docker layers requirement specifically calls for Remove embedded secrets, rotate the exposed token, and inject scoped runtime secrets through an approved manager.

Question 472

After deployment, an engineer must prove the proposed solution works. A Dockerfile stores a live API token in ENV and the container image is pushed to an organization-wide registry. Which observed result is the most direct acceptance evidence?

  1. The deployed image digest equals the artifact that passed tests and scans.
  2. The test fails for an incorrect lowercase return and passes for the intended uppercase behavior.
  3. Image inspection reveals no token and the running service authenticates using its injected secret.
  4. Controlled WAN failure does not prevent local alarms from being generated within the target latency.

Explanation

Correct Answer

C:

Image inspection reveals no token and the running service authenticates using its injected secret. Recommended implementation: Remove embedded secrets, rotate the exposed token, and inject scoped runtime secrets through an approved manager. Why the observation matters: Build layers and image metadata can persist values even after later instructions remove files.

Incorrect Answers

A:

The deployed image digest equals the artifact that passed tests and scans. That observation could confirm Artifact promotion instead of rebuild drift, not the current Move secrets out of Docker layers case. For this case, the decisive observation is: Image inspection reveals no token and the running service authenticates using its injected secret.

B:

The test fails for an incorrect lowercase return and passes for the intended uppercase behavior. That observation could confirm Python unittest test-case assertion, not the current Move secrets out of Docker layers case. For this case, the decisive observation is: Image inspection reveals no token and the running service authenticates using its injected secret.

D:

Controlled WAN failure does not prevent local alarms from being generated within the target latency. That observation could confirm Edge inference for camera safety alerts, not the current Move secrets out of Docker layers case. For this case, the decisive observation is: Image inspection reveals no token and the running service authenticates using its injected secret.

Question 473

A developer is explaining the underlying technical behavior. A Dockerfile stores a live API token in ENV and the container image is pushed to an organization-wide registry. Which principle is most relevant to this case?

  1. Docker build caching reuses unchanged earlier layers when their inputs and instructions match.
  2. Build layers and image metadata can persist values even after later instructions remove files.
  3. DevOps emphasizes shared ownership, continuous feedback and improving the delivery system.
  4. Only exported shell variables are inherited by normal subprocesses.

Explanation

Correct Answer

B:

Build layers and image metadata can persist values even after later instructions remove files. This mechanism explains Move secrets out of Docker layers. Action: Remove embedded secrets, rotate the exposed token, and inject scoped runtime secrets through an approved manager. Expected confirmation: Image inspection reveals no token and the running service authenticates using its injected secret.

Incorrect Answers

A:

Docker build caching reuses unchanged earlier layers when their inputs and instructions match. This relates to Dockerfile layers and dependency caching. In the current Move secrets out of Docker layers case the operative principle is: Build layers and image metadata can persist values even after later instructions remove files.

C:

DevOps emphasizes shared ownership, continuous feedback and improving the delivery system. This relates to Blameless incident review and feedback. In the current Move secrets out of Docker layers case the operative principle is: Build layers and image metadata can persist values even after later instructions remove files.

D:

Only exported shell variables are inherited by normal subprocesses. This relates to Export environment variable for child process. In the current Move secrets out of Docker layers case the operative principle is: Build layers and image metadata can persist values even after later instructions remove files.

Question 474

A team does not apply the necessary control or correction. A Dockerfile stores a live API token in ENV and the container image is pushed to an organization-wide registry. Which resulting failure or risk is most directly relevant?

  1. Moving sensitive data wholesale into an uncontrolled public service can violate residency requirements.
  2. Poor instruction ordering makes image builds slower and less reproducible.
  3. A test that only calls a function without asserting output may silently pass despite wrong results.
  4. Secrets baked into an image can leak to anyone with registry access.

Explanation

Correct Answer

D:

Secrets baked into an image can leak to anyone with registry access. This is the direct exposure for Move secrets out of Docker layers. Mitigate with: Remove embedded secrets, rotate the exposed token, and inject scoped runtime secrets through an approved manager. Check success by: Image inspection reveals no token and the running service authenticates using its injected secret.

Incorrect Answers

A:

Moving sensitive data wholesale into an uncontrolled public service can violate residency requirements. This risk occurs in the different Hybrid cloud for on-prem regulated data situation. For the given Move secrets out of Docker layers requirement, the directly relevant risk is: Secrets baked into an image can leak to anyone with registry access.

B:

Poor instruction ordering makes image builds slower and less reproducible. This risk occurs in the different Dockerfile layers and dependency caching situation. For the given Move secrets out of Docker layers requirement, the directly relevant risk is: Secrets baked into an image can leak to anyone with registry access.

C:

A test that only calls a function without asserting output may silently pass despite wrong results. This risk occurs in the different Python unittest test-case assertion situation. For the given Move secrets out of Docker layers requirement, the directly relevant risk is: Secrets baked into an image can leak to anyone with registry access.

Question 475

The initial implementation fails or does not meet the expected behavior. A Dockerfile stores a live API token in ENV and the container image is pushed to an organization-wide registry. Which investigation should be prioritized to diagnose the problem?

  1. Inspect image digest, runtime dependencies, process list and container logs.
  2. Inspect image history, scanned layers, credential rotation and runtime secret references.
  3. Inspect image history, Dockerfile instructions and container process after docker run.
  4. Inspect mock call history, expected exception and retry policy parameters.

Explanation

Correct Answer

B:

Inspect image history, scanned layers, credential rotation and runtime secret references. These are the relevant initial evidence checks for Move secrets out of Docker layers. Intended action: Remove embedded secrets, rotate the exposed token, and inject scoped runtime secrets through an approved manager. Expected success condition: Image inspection reveals no token and the running service authenticates using its injected secret.

Incorrect Answers

A:

Inspect image digest, runtime dependencies, process list and container logs. This investigation primarily applies to Container versus VM for reproducible app packaging, not the current Move secrets out of Docker layers problem. Prioritize: Inspect image history, scanned layers, credential rotation and runtime secret references.

C:

Inspect image history, Dockerfile instructions and container process after docker run. This investigation primarily applies to Dockerfile CMD versus RUN, not the current Move secrets out of Docker layers problem. Prioritize: Inspect image history, scanned layers, credential rotation and runtime secret references.

D:

Inspect mock call history, expected exception and retry policy parameters. This investigation primarily applies to Mock a failed API response in unit test, not the current Move secrets out of Docker layers problem. Prioritize: Inspect image history, scanned layers, credential rotation and runtime secret references.

Question 476

A Cisco network automation team has this requirement: A webhook receiver accepts basic credentials over HTTP and writes incoming sensitive incident payloads to world-readable files. Which design or implementation action best addresses it?

  1. Inspect reverse-proxy upstream health and service endpoints rather than modifying DNS records first.
  2. Quote variable expansions appropriately and use controlled path validation before removing files.
  3. Create a unittest.TestCase method using self.assertEqual(normalize('guest'),'GUEST').
  4. Require authenticated HTTPS in transit and restrict/encrypt stored event records according to policy.

Explanation

Correct Answer

D:

Require authenticated HTTPS in transit and restrict/encrypt stored event records according to policy. Technical reason: Transport encryption protects data on links, while file permissions and at-rest encryption guard persisted content. Verify by: A plaintext connection is rejected and unauthorized local users cannot read stored payloads. Deployment qualification: End-to-end confidentiality also depends on processing identity and redacted logging.

Incorrect Answers

A:

Inspect reverse-proxy upstream health and service endpoints rather than modifying DNS records first. This instead targets the different case DNS resolution versus load balancer health. The described Enforce HTTPS and protected storage requirement specifically calls for Require authenticated HTTPS in transit and restrict/encrypt stored event records according to policy.

B:

Quote variable expansions appropriately and use controlled path validation before removing files. This instead targets the different case Bash quote paths with spaces. The described Enforce HTTPS and protected storage requirement specifically calls for Require authenticated HTTPS in transit and restrict/encrypt stored event records according to policy.

C:

Create a unittest.TestCase method using self.assertEqual(normalize('guest'),'GUEST'). This instead targets the different case Python unittest test-case assertion. The described Enforce HTTPS and protected storage requirement specifically calls for Require authenticated HTTPS in transit and restrict/encrypt stored event records according to policy.

Question 477

After deployment, an engineer must prove the proposed solution works. A webhook receiver accepts basic credentials over HTTP and writes incoming sensitive incident payloads to world-readable files. Which observed result is the most direct acceptance evidence?

  1. A plaintext connection is rejected and unauthorized local users cannot read stored payloads.
  2. A bad canary release is detected and reversed before affecting all users.
  3. The deployed image digest equals the artifact that passed tests and scans.
  4. The script removes only intended temporary files from the space-containing directory.

Explanation

Correct Answer

A:

A plaintext connection is rejected and unauthorized local users cannot read stored payloads. Recommended implementation: Require authenticated HTTPS in transit and restrict/encrypt stored event records according to policy. Why the observation matters: Transport encryption protects data on links, while file permissions and at-rest encryption guard persisted content.

Incorrect Answers

B:

A bad canary release is detected and reversed before affecting all users. That observation could confirm Small safe releases with observability, not the current Enforce HTTPS and protected storage case. For this case, the decisive observation is: A plaintext connection is rejected and unauthorized local users cannot read stored payloads.

C:

The deployed image digest equals the artifact that passed tests and scans. That observation could confirm Artifact promotion instead of rebuild drift, not the current Enforce HTTPS and protected storage case. For this case, the decisive observation is: A plaintext connection is rejected and unauthorized local users cannot read stored payloads.

D:

The script removes only intended temporary files from the space-containing directory. That observation could confirm Bash quote paths with spaces, not the current Enforce HTTPS and protected storage case. For this case, the decisive observation is: A plaintext connection is rejected and unauthorized local users cannot read stored payloads.

Question 478

A developer is explaining the underlying technical behavior. A webhook receiver accepts basic credentials over HTTP and writes incoming sensitive incident payloads to world-readable files. Which principle is most relevant to this case?

  1. Transport encryption protects data on links, while file permissions and at-rest encryption guard persisted content.
  2. Shell expansion and word splitting operate on unquoted variable contents.
  3. Continuous delivery practices reduce change batch size and shorten feedback loops.
  4. Private cloud places managed compute under organization-controlled resource boundaries.

Explanation

Correct Answer

A:

Transport encryption protects data on links, while file permissions and at-rest encryption guard persisted content. This mechanism explains Enforce HTTPS and protected storage. Action: Require authenticated HTTPS in transit and restrict/encrypt stored event records according to policy. Expected confirmation: A plaintext connection is rejected and unauthorized local users cannot read stored payloads.

Incorrect Answers

B:

Shell expansion and word splitting operate on unquoted variable contents. This relates to Bash quote paths with spaces. In the current Enforce HTTPS and protected storage case the operative principle is: Transport encryption protects data on links, while file permissions and at-rest encryption guard persisted content.

C:

Continuous delivery practices reduce change batch size and shorten feedback loops. This relates to Small safe releases with observability. In the current Enforce HTTPS and protected storage case the operative principle is: Transport encryption protects data on links, while file permissions and at-rest encryption guard persisted content.

D:

Private cloud places managed compute under organization-controlled resource boundaries. This relates to Private cloud isolation for internal services. In the current Enforce HTTPS and protected storage case the operative principle is: Transport encryption protects data on links, while file permissions and at-rest encryption guard persisted content.

Question 479

A team does not apply the necessary control or correction. A webhook receiver accepts basic credentials over HTTP and writes incoming sensitive incident payloads to world-readable files. Which resulting failure or risk is most directly relevant?

  1. A local shell variable not exported will be unavailable to child executables.
  2. Unquoted destructive commands can target unintended files or fail unpredictably.
  3. HTTPS alone does not secure copies of messages written to unprotected disks.
  4. Choosing public cloud merely for convenience can conflict with the required isolation.

Explanation

Correct Answer

C:

HTTPS alone does not secure copies of messages written to unprotected disks. This is the direct exposure for Enforce HTTPS and protected storage. Mitigate with: Require authenticated HTTPS in transit and restrict/encrypt stored event records according to policy. Check success by: A plaintext connection is rejected and unauthorized local users cannot read stored payloads.

Incorrect Answers

A:

A local shell variable not exported will be unavailable to child executables. This risk occurs in the different Export environment variable for child process situation. For the given Enforce HTTPS and protected storage requirement, the directly relevant risk is: HTTPS alone does not secure copies of messages written to unprotected disks.

B:

Unquoted destructive commands can target unintended files or fail unpredictably. This risk occurs in the different Bash quote paths with spaces situation. For the given Enforce HTTPS and protected storage requirement, the directly relevant risk is: HTTPS alone does not secure copies of messages written to unprotected disks.

D:

Choosing public cloud merely for convenience can conflict with the required isolation. This risk occurs in the different Private cloud isolation for internal services situation. For the given Enforce HTTPS and protected storage requirement, the directly relevant risk is: HTTPS alone does not secure copies of messages written to unprotected disks.

Question 480

The initial implementation fails or does not meet the expected behavior. A webhook receiver accepts basic credentials over HTTP and writes incoming sensitive incident payloads to world-readable files. Which investigation should be prioritized to diagnose the problem?

  1. Inspect TLS configuration, file permissions, encryption settings and retention rules.
  2. Inspect listening sockets, path ACLs, SYN/SYN-ACK captures and proxy rules.
  3. Inspect deployment inventory, egress policies and platform management access.
  4. Compare CI artifact digest, registry manifest and deployed workload image reference.

Explanation

Correct Answer

A:

Inspect TLS configuration, file permissions, encryption settings and retention rules. These are the relevant initial evidence checks for Enforce HTTPS and protected storage. Intended action: Require authenticated HTTPS in transit and restrict/encrypt stored event records according to policy. Expected success condition: A plaintext connection is rejected and unauthorized local users cannot read stored payloads.

Incorrect Answers

B:

Inspect listening sockets, path ACLs, SYN/SYN-ACK captures and proxy rules. This investigation primarily applies to Firewall rule versus application listener, not the current Enforce HTTPS and protected storage problem. Prioritize: Inspect TLS configuration, file permissions, encryption settings and retention rules.

C:

Inspect deployment inventory, egress policies and platform management access. This investigation primarily applies to Private cloud isolation for internal services, not the current Enforce HTTPS and protected storage problem. Prioritize: Inspect TLS configuration, file permissions, encryption settings and retention rules.

D:

Compare CI artifact digest, registry manifest and deployed workload image reference. This investigation primarily applies to Artifact promotion instead of rebuild drift, not the current Enforce HTTPS and protected storage problem. Prioritize: Inspect TLS configuration, file permissions, encryption settings and retention rules.

DevNet Associate (DEVASC) (200-901) Practice Tests

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