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DevNet Associate (DEVASC) 200-901 Practice Test 64

Question 630

The initial implementation fails or does not meet the expected behavior. A deployment script checks id svc_bot >/dev/null 2>&1 || useradd svc_bot before installing a service; operations thinks every run creates a duplicate account. Which investigation should be prioritized to diagnose the problem?

  1. Inspect service facts, task parameters and service manager status.
  2. Inspect APIC class query, dn attributes and object class names.
  3. Inspect exit status, user database and useradd invocation during repeat runs.
  4. Inspect resource path, HTTP method, module data and the absence of PATCH/PUT/POST.

Explanation

Correct Answer

C:

Inspect exit status, user database and useradd invocation during repeat runs. These are the relevant initial evidence checks for Bash user creation guarded by id. Intended action: Interpret the OR branch as creating svc_bot only when the id lookup fails. Expected success condition: A first run creates the missing user; a subsequent run leaves the existing user unchanged.

Incorrect Answers

A:

Inspect service facts, task parameters and service manager status. This investigation primarily applies to Ansible service started and enabled, not the current Bash user creation guarded by id problem. Prioritize: Inspect exit status, user database and useradd invocation during repeat runs.

B:

Inspect APIC class query, dn attributes and object class names. This investigation primarily applies to Interpret ACI EPG membership script, not the current Bash user creation guarded by id problem. Prioritize: Inspect exit status, user database and useradd invocation during repeat runs.

D:

Inspect resource path, HTTP method, module data and the absence of PATCH/PUT/POST. This investigation primarily applies to Interpret RESTCONF configuration retrieval, not the current Bash user creation guarded by id problem. Prioritize: Inspect exit status, user database and useradd invocation during repeat runs.

Question 631

A Cisco network automation team has this requirement: An interface monitor GETs a RESTCONF YANG resource and receives HTTP 200 with a JSON object containing interface enabled false. Which design or implementation action best addresses it?

  1. Identify the script as a read of modeled interface configuration or state according to the specific resource path.
  2. Interpret the task as ensuring the package is installed on the selected Debian-based hosts.
  3. Read the structured payload as successfully retrieved disabled configured state, not as a failed HTTP request.
  4. Block merge, revoke any exposed secret, and require reviewer-approved secret injection before release.

Explanation

Correct Answer

C:

Read the structured payload as successfully retrieved disabled configured state, not as a failed HTTP request. Technical reason: An HTTP 200 reports request success; modeled leaf values separately describe device state. Verify by: The interface's enabled flag is false while the transport request itself succeeded. Deployment qualification: Operational link status may differ from configured enabled state.

Incorrect Answers

A:

Identify the script as a read of modeled interface configuration or state according to the specific resource path. This instead targets the different case Interpret RESTCONF configuration retrieval. The described Interpret RESTCONF HTTP 200 resource data requirement specifically calls for Read the structured payload as successfully retrieved disabled configured state, not as a failed HTTP request.

B:

Interpret the task as ensuring the package is installed on the selected Debian-based hosts. This instead targets the different case Ansible package installation state. The described Interpret RESTCONF HTTP 200 resource data requirement specifically calls for Read the structured payload as successfully retrieved disabled configured state, not as a failed HTTP request.

D:

Block merge, revoke any exposed secret, and require reviewer-approved secret injection before release. This instead targets the different case Peer review catches hard-coded credential. The described Interpret RESTCONF HTTP 200 resource data requirement specifically calls for Read the structured payload as successfully retrieved disabled configured state, not as a failed HTTP request.

Question 632

After deployment, an engineer must prove the proposed solution works. An interface monitor GETs a RESTCONF YANG resource and receives HTTP 200 with a JSON object containing interface enabled false. Which observed result is the most direct acceptance evidence?

  1. The service is running and its enabled state persists across a normal restart.
  2. The plan reports the unexpected live rule before any approved apply modifies it.
  3. The interface's enabled flag is false while the transport request itself succeeded.
  4. Cloud networks are created reproducibly and hosts receive package/service configuration in distinct phases.

Explanation

Correct Answer

C:

The interface's enabled flag is false while the transport request itself succeeded. Recommended implementation: Read the structured payload as successfully retrieved disabled configured state, not as a failed HTTP request. Why the observation matters: An HTTP 200 reports request success; modeled leaf values separately describe device state.

Incorrect Answers

A:

The service is running and its enabled state persists across a normal restart. That observation could confirm Ansible service started and enabled, not the current Interpret RESTCONF HTTP 200 resource data case. For this case, the decisive observation is: The interface's enabled flag is false while the transport request itself succeeded.

B:

The plan reports the unexpected live rule before any approved apply modifies it. That observation could confirm Detect drift with planned IaC comparison, not the current Interpret RESTCONF HTTP 200 resource data case. For this case, the decisive observation is: The interface's enabled flag is false while the transport request itself succeeded.

D:

Cloud networks are created reproducibly and hosts receive package/service configuration in distinct phases. That observation could confirm Terraform versus Ansible responsibilities, not the current Interpret RESTCONF HTTP 200 resource data case. For this case, the decisive observation is: The interface's enabled flag is false while the transport request itself succeeded.

Question 633

A developer is explaining the underlying technical behavior. An interface monitor GETs a RESTCONF YANG resource and receives HTTP 200 with a JSON object containing interface enabled false. Which principle is most relevant to this case?

  1. A YANG leaf-list is a sequence of scalar values rather than a list of keyed records.
  2. Infrastructure CI/CD embeds policy tests and staged delivery before state mutation.
  3. YANG mandatory constraints require specified nodes to exist in applicable instances.
  4. An HTTP 200 reports request success; modeled leaf values separately describe device state.

Explanation

Correct Answer

D:

An HTTP 200 reports request success; modeled leaf values separately describe device state. This mechanism explains Interpret RESTCONF HTTP 200 resource data. Action: Read the structured payload as successfully retrieved disabled configured state, not as a failed HTTP request. Expected confirmation: The interface's enabled flag is false while the transport request itself succeeded.

Incorrect Answers

A:

A YANG leaf-list is a sequence of scalar values rather than a list of keyed records. This relates to Interpret YANG leaf-list of DNS servers. In the current Interpret RESTCONF HTTP 200 resource data case the operative principle is: An HTTP 200 reports request success; modeled leaf values separately describe device state.

B:

Infrastructure CI/CD embeds policy tests and staged delivery before state mutation. This relates to Infrastructure pipeline validate before apply. In the current Interpret RESTCONF HTTP 200 resource data case the operative principle is: An HTTP 200 reports request success; modeled leaf values separately describe device state.

C:

YANG mandatory constraints require specified nodes to exist in applicable instances. This relates to Interpret YANG mandatory leaf. In the current Interpret RESTCONF HTTP 200 resource data case the operative principle is: An HTTP 200 reports request success; modeled leaf values separately describe device state.

Question 634

A team does not apply the necessary control or correction. An interface monitor GETs a RESTCONF YANG resource and receives HTTP 200 with a JSON object containing interface enabled false. Which resulting failure or risk is most directly relevant?

  1. Misclassifying a GET inventory flow as remediation can create false operational expectations.
  2. Ignoring failed network tests can spread an outage despite available detection.
  3. Playbook syntax validity does not establish network topology correctness.
  4. Confusing a device setting with transport status can invert monitoring alerts.

Explanation

Correct Answer

D:

Confusing a device setting with transport status can invert monitoring alerts. This is the direct exposure for Interpret RESTCONF HTTP 200 resource data. Mitigate with: Read the structured payload as successfully retrieved disabled configured state, not as a failed HTTP request. Check success by: The interface's enabled flag is false while the transport request itself succeeded.

Incorrect Answers

A:

Misclassifying a GET inventory flow as remediation can create false operational expectations. This risk occurs in the different Interpret Catalyst Center device health report situation. For the given Interpret RESTCONF HTTP 200 resource data requirement, the directly relevant risk is: Confusing a device setting with transport status can invert monitoring alerts.

B:

Ignoring failed network tests can spread an outage despite available detection. This risk occurs in the different Block a network rollout on failed pyATS checks situation. For the given Interpret RESTCONF HTTP 200 resource data requirement, the directly relevant risk is: Confusing a device setting with transport status can invert monitoring alerts.

C:

Playbook syntax validity does not establish network topology correctness. This risk occurs in the different CML and pyATS roles in preflight situation. For the given Interpret RESTCONF HTTP 200 resource data requirement, the directly relevant risk is: Confusing a device setting with transport status can invert monitoring alerts.

Question 635

The initial implementation fails or does not meet the expected behavior. An interface monitor GETs a RESTCONF YANG resource and receives HTTP 200 with a JSON object containing interface enabled false. Which investigation should be prioritized to diagnose the problem?

  1. Inspect status line, interface key and the boolean leaf in the returned model.
  2. Inspect loop fragment, status responses and the final backup artifact retrieval.
  3. Inspect diff headers, hunk ranges and prefix character of each line.
  4. Inspect YANG schema, desired-state diff, structured device data and repeated-run results.

Explanation

Correct Answer

A:

Inspect status line, interface key and the boolean leaf in the returned model. These are the relevant initial evidence checks for Interpret RESTCONF HTTP 200 resource data. Intended action: Read the structured payload as successfully retrieved disabled configured state, not as a failed HTTP request. Expected success condition: The interface's enabled flag is false while the transport request itself succeeded.

Incorrect Answers

B:

Inspect loop fragment, status responses and the final backup artifact retrieval. This investigation primarily applies to Sequence diagram 202 job polling loop, not the current Interpret RESTCONF HTTP 200 resource data problem. Prioritize: Inspect status line, interface key and the boolean leaf in the returned model.

C:

Inspect diff headers, hunk ranges and prefix character of each line. This investigation primarily applies to Unified diff context versus change lines, not the current Interpret RESTCONF HTTP 200 resource data problem. Prioritize: Inspect status line, interface key and the boolean leaf in the returned model.

D:

Inspect YANG schema, desired-state diff, structured device data and repeated-run results. This investigation primarily applies to Desired-state YANG instead of CLI scraping, not the current Interpret RESTCONF HTTP 200 resource data problem. Prioritize: Inspect status line, interface key and the boolean leaf in the returned model.

Question 636

A Cisco network automation team has this requirement: A NETCONF server replies with rpc-error error-tag access-denied to an edit-config request; a script treats the presence of an rpc-reply wrapper as success. Which design or implementation action best addresses it?

  1. Identify the script as a read of modeled interface configuration or state according to the specific resource path.
  2. Treat the rpc-error as a failed configuration operation and investigate authorization or datastore permissions.
  3. Interpret the task as starting the service now and configuring it to start at boot where supported.
  4. Block merge, revoke any exposed secret, and require reviewer-approved secret injection before release.

Explanation

Correct Answer

B:

Treat the rpc-error as a failed configuration operation and investigate authorization or datastore permissions. Technical reason: NETCONF RPC replies distinguish success acknowledgements from structured error elements. Verify by: The transaction is reported failed and no unauthorized configuration change is claimed. Deployment qualification: Specific error-tags depend on the requested operation and target capabilities.

Incorrect Answers

A:

Identify the script as a read of modeled interface configuration or state according to the specific resource path. This instead targets the different case Interpret RESTCONF configuration retrieval. The described Interpret NETCONF rpc-error response requirement specifically calls for Treat the rpc-error as a failed configuration operation and investigate authorization or datastore permissions.

C:

Interpret the task as starting the service now and configuring it to start at boot where supported. This instead targets the different case Ansible service started and enabled. The described Interpret NETCONF rpc-error response requirement specifically calls for Treat the rpc-error as a failed configuration operation and investigate authorization or datastore permissions.

D:

Block merge, revoke any exposed secret, and require reviewer-approved secret injection before release. This instead targets the different case Peer review catches hard-coded credential. The described Interpret NETCONF rpc-error response requirement specifically calls for Treat the rpc-error as a failed configuration operation and investigate authorization or datastore permissions.

Question 637

After deployment, an engineer must prove the proposed solution works. A NETCONF server replies with rpc-error error-tag access-denied to an edit-config request; a script treats the presence of an rpc-reply wrapper as success. Which observed result is the most direct acceptance evidence?

  1. The transaction is reported failed and no unauthorized configuration change is claimed.
  2. The simulated change yields expected route reachability and no simulated loop under the tested failure cases.
  3. After execution, nginx package is present and a repeat run usually reports unchanged.
  4. A fixture containing two devices produces two correctly labeled status rows without writes.

Explanation

Correct Answer

A:

The transaction is reported failed and no unauthorized configuration change is claimed. Recommended implementation: Treat the rpc-error as a failed configuration operation and investigate authorization or datastore permissions. Why the observation matters: NETCONF RPC replies distinguish success acknowledgements from structured error elements.

Incorrect Answers

B:

The simulated change yields expected route reachability and no simulated loop under the tested failure cases. That observation could confirm Cisco Modeling Labs topology before production change, not the current Interpret NETCONF rpc-error response case. For this case, the decisive observation is: The transaction is reported failed and no unauthorized configuration change is claimed.

C:

After execution, nginx package is present and a repeat run usually reports unchanged. That observation could confirm Ansible package installation state, not the current Interpret NETCONF rpc-error response case. For this case, the decisive observation is: The transaction is reported failed and no unauthorized configuration change is claimed.

D:

A fixture containing two devices produces two correctly labeled status rows without writes. That observation could confirm Interpret Catalyst Center device health report, not the current Interpret NETCONF rpc-error response case. For this case, the decisive observation is: The transaction is reported failed and no unauthorized configuration change is claimed.

Question 638

A developer is explaining the underlying technical behavior. A NETCONF server replies with rpc-error error-tag access-denied to an edit-config request; a script treats the presence of an rpc-reply wrapper as success. Which principle is most relevant to this case?

  1. A testbed file separates device connectivity inventory from verification functions.
  2. NETCONF RPC replies distinguish success acknowledgements from structured error elements.
  3. IaC plan compares declared desired state with discovered provider resources and tracked state.
  4. Unified diff uses - for lines in the old version only and + for lines in the new version only.

Explanation

Correct Answer

B:

NETCONF RPC replies distinguish success acknowledgements from structured error elements. This mechanism explains Interpret NETCONF rpc-error response. Action: Treat the rpc-error as a failed configuration operation and investigate authorization or datastore permissions. Expected confirmation: The transaction is reported failed and no unauthorized configuration change is claimed.

Incorrect Answers

A:

A testbed file separates device connectivity inventory from verification functions. This relates to Testbed metadata for automated lab connections. In the current Interpret NETCONF rpc-error response case the operative principle is: NETCONF RPC replies distinguish success acknowledgements from structured error elements.

C:

IaC plan compares declared desired state with discovered provider resources and tracked state. This relates to Detect drift with planned IaC comparison. In the current Interpret NETCONF rpc-error response case the operative principle is: NETCONF RPC replies distinguish success acknowledgements from structured error elements.

D:

Unified diff uses - for lines in the old version only and + for lines in the new version only. This relates to Unified diff shows removed firewall allowance. In the current Interpret NETCONF rpc-error response case the operative principle is: NETCONF RPC replies distinguish success acknowledgements from structured error elements.

Question 639

A team does not apply the necessary control or correction. A NETCONF server replies with rpc-error error-tag access-denied to an edit-config request; a script treats the presence of an rpc-reply wrapper as success. Which resulting failure or risk is most directly relevant?

  1. Ignoring enabled can leave the application unavailable after host reboot.
  2. Ignoring rpc-error can produce false-success automation logs.
  3. Misreading arrows can cause a script to query inventory before obtaining credentials.
  4. Misusing imperative provisioners as core state management makes drift and retries difficult.

Explanation

Correct Answer

B:

Ignoring rpc-error can produce false-success automation logs. This is the direct exposure for Interpret NETCONF rpc-error response. Mitigate with: Treat the rpc-error as a failed configuration operation and investigate authorization or datastore permissions. Check success by: The transaction is reported failed and no unauthorized configuration change is claimed.

Incorrect Answers

A:

Ignoring enabled can leave the application unavailable after host reboot. This risk occurs in the different Ansible service started and enabled situation. For the given Interpret NETCONF rpc-error response requirement, the directly relevant risk is: Ignoring rpc-error can produce false-success automation logs.

C:

Misreading arrows can cause a script to query inventory before obtaining credentials. This risk occurs in the different Sequence diagram shows token then inventory situation. For the given Interpret NETCONF rpc-error response requirement, the directly relevant risk is: Ignoring rpc-error can produce false-success automation logs.

D:

Misusing imperative provisioners as core state management makes drift and retries difficult. This risk occurs in the different Terraform versus Ansible responsibilities situation. For the given Interpret NETCONF rpc-error response requirement, the directly relevant risk is: Ignoring rpc-error can produce false-success automation logs.

Question 640

The initial implementation fails or does not meet the expected behavior. A NETCONF server replies with rpc-error error-tag access-denied to an edit-config request; a script treats the presence of an rpc-reply wrapper as success. Which investigation should be prioritized to diagnose the problem?

  1. Inspect schema mandatory statements, validation path and returned error.
  2. Inspect error-tag, error-message, selected datastore and user role.
  3. Inspect playbook module selection, changed flags and resulting configuration.
  4. Inspect resource path, HTTP method, module data and the absence of PATCH/PUT/POST.

Explanation

Correct Answer

B:

Inspect error-tag, error-message, selected datastore and user role. These are the relevant initial evidence checks for Interpret NETCONF rpc-error response. Intended action: Treat the rpc-error as a failed configuration operation and investigate authorization or datastore permissions. Expected success condition: The transaction is reported failed and no unauthorized configuration change is claimed.

Incorrect Answers

A:

Inspect schema mandatory statements, validation path and returned error. This investigation primarily applies to Interpret YANG mandatory leaf, not the current Interpret NETCONF rpc-error response problem. Prioritize: Inspect error-tag, error-message, selected datastore and user role.

C:

Inspect playbook module selection, changed flags and resulting configuration. This investigation primarily applies to Ansible playbook for idempotent configuration, not the current Interpret NETCONF rpc-error response problem. Prioritize: Inspect error-tag, error-message, selected datastore and user role.

D:

Inspect resource path, HTTP method, module data and the absence of PATCH/PUT/POST. This investigation primarily applies to Interpret RESTCONF configuration retrieval, not the current Interpret NETCONF rpc-error response problem. Prioritize: Inspect error-tag, error-message, selected datastore and user role.

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

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