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DevNet Associate (DEVASC) 200-901 Practice Test 61

Question 600

The initial implementation fails or does not meet the expected behavior. A Python tool queries APIC for fvAEPg objects and prints tenant, application profile and EPG name; an analyst calls the output a list of physical switch ports. Which investigation should be prioritized to diagnose the problem?

  1. Inspect configuration, plan differences and deployed resource attributes.
  2. Inspect module name, package name, target hosts and changed status.
  3. Inspect APIC class query, dn attributes and object class names.
  4. Inspect YANG schema, desired-state diff, structured device data and repeated-run results.

Explanation

Correct Answer

C:

Inspect APIC class query, dn attributes and object class names. These are the relevant initial evidence checks for Interpret ACI EPG membership script. Intended action: Interpret the operation as an ACI logical application EPG inventory, not an interface inventory. Expected success condition: The output matches expected EPG names and excludes unrelated leaf interface objects.

Incorrect Answers

A:

Inspect configuration, plan differences and deployed resource attributes. This investigation primarily applies to Terraform declared state for repeatable sites, not the current Interpret ACI EPG membership script problem. Prioritize: Inspect APIC class query, dn attributes and object class names.

B:

Inspect module name, package name, target hosts and changed status. This investigation primarily applies to Ansible package installation state, not the current Interpret ACI EPG membership script problem. Prioritize: Inspect APIC class query, dn attributes and object class names.

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 ACI EPG membership script problem. Prioritize: Inspect APIC class query, dn attributes and object class names.

Question 601

A Cisco network automation team has this requirement: A program requests Catalyst Center network-device data and reports hostname, reachabilityStatus and platformId for each result. Which design or implementation action best addresses it?

  1. Classify the script as a read-only managed-device inventory/health report rather than an interface configuration updater.
  2. Interpret the sequence as token acquisition followed by an authenticated read-only inventory operation.
  3. Interpret the task as ensuring the package is installed on the selected Debian-based hosts.
  4. Use pyATS/Genie structured parsing and automated comparison for relevant learned routes and interfaces.

Explanation

Correct Answer

A:

Classify the script as a read-only managed-device inventory/health report rather than an interface configuration updater. Technical reason: Controller inventory APIs can return operational attributes without modifying managed state. Verify by: A fixture containing two devices produces two correctly labeled status rows without writes. Deployment qualification: Reachability fields may be delayed or differ from a direct ICMP probe.

Incorrect Answers

B:

Interpret the sequence as token acquisition followed by an authenticated read-only inventory operation. This instead targets the different case Sequence diagram shows token then inventory. The described Interpret Catalyst Center device health report requirement specifically calls for Classify the script as a read-only managed-device inventory/health report rather than an interface configuration updater.

C:

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 Catalyst Center device health report requirement specifically calls for Classify the script as a read-only managed-device inventory/health report rather than an interface configuration updater.

D:

Use pyATS/Genie structured parsing and automated comparison for relevant learned routes and interfaces. This instead targets the different case pyATS structured network state verification. The described Interpret Catalyst Center device health report requirement specifically calls for Classify the script as a read-only managed-device inventory/health report rather than an interface configuration updater.

Question 602

After deployment, an engineer must prove the proposed solution works. A program requests Catalyst Center network-device data and reports hostname, reachabilityStatus and platformId for each result. Which observed result is the most direct acceptance evidence?

  1. The router returns the exact interface counter without affecting other devices.
  2. A fixture containing two devices produces two correctly labeled status rows without writes.
  3. Repeated runs converge eligible interfaces to the approved descriptions without text-format-dependent parsing.
  4. The reviewed candidate explicitly blocks Telnet whereas the previous line allowed it.

Explanation

Correct Answer

B:

A fixture containing two devices produces two correctly labeled status rows without writes. Recommended implementation: Classify the script as a read-only managed-device inventory/health report rather than an interface configuration updater. Why the observation matters: Controller inventory APIs can return operational attributes without modifying managed state.

Incorrect Answers

A:

The router returns the exact interface counter without affecting other devices. That observation could confirm Device-level interface test outside controller policy, not the current Interpret Catalyst Center device health report case. For this case, the decisive observation is: A fixture containing two devices produces two correctly labeled status rows without writes.

C:

Repeated runs converge eligible interfaces to the approved descriptions without text-format-dependent parsing. That observation could confirm Desired-state YANG instead of CLI scraping, not the current Interpret Catalyst Center device health report case. For this case, the decisive observation is: A fixture containing two devices produces two correctly labeled status rows without writes.

D:

The reviewed candidate explicitly blocks Telnet whereas the previous line allowed it. That observation could confirm Unified diff shows removed firewall allowance, not the current Interpret Catalyst Center device health report case. For this case, the decisive observation is: A fixture containing two devices produces two correctly labeled status rows without writes.

Question 603

A developer is explaining the underlying technical behavior. A program requests Catalyst Center network-device data and reports hostname, reachabilityStatus and platformId for each result. Which principle is most relevant to this case?

  1. Device APIs expose local state even when no controller owns its management policy.
  2. Infrastructure CI/CD embeds policy tests and staged delivery before state mutation.
  3. Controller inventory APIs can return operational attributes without modifying managed state.
  4. Shell || executes the right command only when the preceding command exits unsuccessfully.

Explanation

Correct Answer

C:

Controller inventory APIs can return operational attributes without modifying managed state. This mechanism explains Interpret Catalyst Center device health report. Action: Classify the script as a read-only managed-device inventory/health report rather than an interface configuration updater. Expected confirmation: A fixture containing two devices produces two correctly labeled status rows without writes.

Incorrect Answers

A:

Device APIs expose local state even when no controller owns its management policy. This relates to Device-level interface test outside controller policy. In the current Interpret Catalyst Center device health report case the operative principle is: Controller inventory APIs can return operational attributes without modifying managed 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 Catalyst Center device health report case the operative principle is: Controller inventory APIs can return operational attributes without modifying managed state.

D:

Shell || executes the right command only when the preceding command exits unsuccessfully. This relates to Bash user creation guarded by id. In the current Interpret Catalyst Center device health report case the operative principle is: Controller inventory APIs can return operational attributes without modifying managed state.

Question 604

A team does not apply the necessary control or correction. A program requests Catalyst Center network-device data and reports hostname, reachabilityStatus and platformId for each result. Which resulting failure or risk is most directly relevant?

  1. Misreading arrows can cause a script to query inventory before obtaining credentials.
  2. Misclassifying a GET inventory flow as remediation can create false operational expectations.
  3. Automating an unsafe bulk push can magnify configuration errors across sites.
  4. Click-ops provisioning creates inconsistent configuration and weak change history.

Explanation

Correct Answer

B:

Misclassifying a GET inventory flow as remediation can create false operational expectations. This is the direct exposure for Interpret Catalyst Center device health report. Mitigate with: Classify the script as a read-only managed-device inventory/health report rather than an interface configuration updater. Check success by: A fixture containing two devices produces two correctly labeled status rows without writes.

Incorrect Answers

A:

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 Catalyst Center device health report requirement, the directly relevant risk is: Misclassifying a GET inventory flow as remediation can create false operational expectations.

C:

Automating an unsafe bulk push can magnify configuration errors across sites. This risk occurs in the different Infrastructure pipeline validate before apply situation. For the given Interpret Catalyst Center device health report requirement, the directly relevant risk is: Misclassifying a GET inventory flow as remediation can create false operational expectations.

D:

Click-ops provisioning creates inconsistent configuration and weak change history. This risk occurs in the different Terraform declared state for repeatable sites situation. For the given Interpret Catalyst Center device health report requirement, the directly relevant risk is: Misclassifying a GET inventory flow as remediation can create false operational expectations.

Question 605

The initial implementation fails or does not meet the expected behavior. A program requests Catalyst Center network-device data and reports hostname, reachabilityStatus and platformId for each result. Which investigation should be prioritized to diagnose the problem?

  1. Inspect HTTP method, response keys and absence of configuration-changing calls.
  2. Inspect configuration, plan differences and deployed resource attributes.
  3. Inspect testbed YAML, device aliases and authentication/connection logs.
  4. Inspect YANG schema, desired-state diff, structured device data and repeated-run results.

Explanation

Correct Answer

A:

Inspect HTTP method, response keys and absence of configuration-changing calls. These are the relevant initial evidence checks for Interpret Catalyst Center device health report. Intended action: Classify the script as a read-only managed-device inventory/health report rather than an interface configuration updater. Expected success condition: A fixture containing two devices produces two correctly labeled status rows without writes.

Incorrect Answers

B:

Inspect configuration, plan differences and deployed resource attributes. This investigation primarily applies to Terraform declared state for repeatable sites, not the current Interpret Catalyst Center device health report problem. Prioritize: Inspect HTTP method, response keys and absence of configuration-changing calls.

C:

Inspect testbed YAML, device aliases and authentication/connection logs. This investigation primarily applies to Testbed metadata for automated lab connections, not the current Interpret Catalyst Center device health report problem. Prioritize: Inspect HTTP method, response keys and absence of configuration-changing calls.

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 Catalyst Center device health report problem. Prioritize: Inspect HTTP method, response keys and absence of configuration-changing calls.

Question 606

A Cisco network automation team has this requirement: A Python script sends GET to /restconf/data/ietf-interfaces:interfaces with Accept application/yang-data+json and prints interface enabled flags. Which design or implementation action best addresses it?

  1. Read the structured payload as successfully retrieved disabled configured state, not as a failed HTTP request.
  2. Identify the script as a read of modeled interface configuration or state according to the specific resource path.
  3. Interpret the script as deleting matching log files older than seven days within the specified directory.
  4. Use pyATS/Genie structured parsing and automated comparison for relevant learned routes and interfaces.

Explanation

Correct Answer

B:

Identify the script as a read of modeled interface configuration or state according to the specific resource path. Technical reason: RESTCONF GET retrieves YANG-modeled resources over HTTP rather than pushing a configuration update. Verify by: The parsed list reports the enabled flags for the requested interfaces without applying changes. Deployment qualification: The difference between configured and operational values depends on model trees and selected resource.

Incorrect Answers

A:

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

C:

Interpret the script as deleting matching log files older than seven days within the specified directory. This instead targets the different case Bash script conditional cleanup workflow. The described Interpret RESTCONF configuration retrieval requirement specifically calls for Identify the script as a read of modeled interface configuration or state according to the specific resource path.

D:

Use pyATS/Genie structured parsing and automated comparison for relevant learned routes and interfaces. This instead targets the different case pyATS structured network state verification. The described Interpret RESTCONF configuration retrieval requirement specifically calls for Identify the script as a read of modeled interface configuration or state according to the specific resource path.

Question 607

After deployment, an engineer must prove the proposed solution works. A Python script sends GET to /restconf/data/ietf-interfaces:interfaces with Accept application/yang-data+json and prints interface enabled flags. Which observed result is the most direct acceptance evidence?

  1. The parsed list reports the enabled flags for the requested interfaces without applying changes.
  2. The second playbook run reports no unnecessary changes and DNS lines remain unique.
  3. The automated pre/post report flags only the intended route deltas and catches a missing neighbor.
  4. A test directory retains new logs while old matching .log files are removed.

Explanation

Correct Answer

A:

The parsed list reports the enabled flags for the requested interfaces without applying changes. Recommended implementation: Identify the script as a read of modeled interface configuration or state according to the specific resource path. Why the observation matters: RESTCONF GET retrieves YANG-modeled resources over HTTP rather than pushing a configuration update.

Incorrect Answers

B:

The second playbook run reports no unnecessary changes and DNS lines remain unique. That observation could confirm Ansible playbook for idempotent configuration, not the current Interpret RESTCONF configuration retrieval case. For this case, the decisive observation is: The parsed list reports the enabled flags for the requested interfaces without applying changes.

C:

The automated pre/post report flags only the intended route deltas and catches a missing neighbor. That observation could confirm pyATS structured network state verification, not the current Interpret RESTCONF configuration retrieval case. For this case, the decisive observation is: The parsed list reports the enabled flags for the requested interfaces without applying changes.

D:

A test directory retains new logs while old matching .log files are removed. That observation could confirm Bash script conditional cleanup workflow, not the current Interpret RESTCONF configuration retrieval case. For this case, the decisive observation is: The parsed list reports the enabled flags for the requested interfaces without applying changes.

Question 608

A developer is explaining the underlying technical behavior. A Python script sends GET to /restconf/data/ietf-interfaces:interfaces with Accept application/yang-data+json and prints interface enabled flags. 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. Provisioning tools and configuration-management tools have overlapping but different primary abstractions.
  3. Sequence diagrams order interactions among participants and show request/response dependencies.
  4. RESTCONF GET retrieves YANG-modeled resources over HTTP rather than pushing a configuration update.

Explanation

Correct Answer

D:

RESTCONF GET retrieves YANG-modeled resources over HTTP rather than pushing a configuration update. This mechanism explains Interpret RESTCONF configuration retrieval. Action: Identify the script as a read of modeled interface configuration or state according to the specific resource path. Expected confirmation: The parsed list reports the enabled flags for the requested interfaces without applying changes.

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 configuration retrieval case the operative principle is: RESTCONF GET retrieves YANG-modeled resources over HTTP rather than pushing a configuration update.

B:

Provisioning tools and configuration-management tools have overlapping but different primary abstractions. This relates to Terraform versus Ansible responsibilities. In the current Interpret RESTCONF configuration retrieval case the operative principle is: RESTCONF GET retrieves YANG-modeled resources over HTTP rather than pushing a configuration update.

C:

Sequence diagrams order interactions among participants and show request/response dependencies. This relates to Sequence diagram shows token then inventory. In the current Interpret RESTCONF configuration retrieval case the operative principle is: RESTCONF GET retrieves YANG-modeled resources over HTTP rather than pushing a configuration update.

Question 609

A team does not apply the necessary control or correction. A Python script sends GET to /restconf/data/ietf-interfaces:interfaces with Accept application/yang-data+json and prints interface enabled flags. Which resulting failure or risk is most directly relevant?

  1. Ignoring enabled can leave the application unavailable after host reboot.
  2. Querying an unrelated controller could give incomplete or stale device state.
  3. Direct per-device edits can be overwritten or create inconsistent centrally managed state.
  4. An analyst who treats the GET as a configuration commit might falsely claim that interfaces were enabled.

Explanation

Correct Answer

D:

An analyst who treats the GET as a configuration commit might falsely claim that interfaces were enabled. This is the direct exposure for Interpret RESTCONF configuration retrieval. Mitigate with: Identify the script as a read of modeled interface configuration or state according to the specific resource path. Check success by: The parsed list reports the enabled flags for the requested interfaces without applying changes.

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 RESTCONF configuration retrieval requirement, the directly relevant risk is: An analyst who treats the GET as a configuration commit might falsely claim that interfaces were enabled.

B:

Querying an unrelated controller could give incomplete or stale device state. This risk occurs in the different Device-level interface test outside controller policy situation. For the given Interpret RESTCONF configuration retrieval requirement, the directly relevant risk is: An analyst who treats the GET as a configuration commit might falsely claim that interfaces were enabled.

C:

Direct per-device edits can be overwritten or create inconsistent centrally managed state. This risk occurs in the different Controller-level Wi-Fi policy at multiple sites situation. For the given Interpret RESTCONF configuration retrieval requirement, the directly relevant risk is: An analyst who treats the GET as a configuration commit might falsely claim that interfaces were enabled.

Question 610

The initial implementation fails or does not meet the expected behavior. A Python script sends GET to /restconf/data/ietf-interfaces:interfaces with Accept application/yang-data+json and prints interface enabled flags. Which investigation should be prioritized to diagnose the problem?

  1. Inspect configuration, plan differences and deployed resource attributes.
  2. Inspect resource path, HTTP method, module data and the absence of PATCH/PUT/POST.
  3. Inspect diff headers, hunk ranges and prefix character of each line.
  4. Inspect organization/network policy, controller task status and representative AP behavior.

Explanation

Correct Answer

B:

Inspect resource path, HTTP method, module data and the absence of PATCH/PUT/POST. These are the relevant initial evidence checks for Interpret RESTCONF configuration retrieval. Intended action: Identify the script as a read of modeled interface configuration or state according to the specific resource path. Expected success condition: The parsed list reports the enabled flags for the requested interfaces without applying changes.

Incorrect Answers

A:

Inspect configuration, plan differences and deployed resource attributes. This investigation primarily applies to Terraform declared state for repeatable sites, not the current Interpret RESTCONF configuration retrieval problem. Prioritize: Inspect resource path, HTTP method, module data and the absence of PATCH/PUT/POST.

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 configuration retrieval problem. Prioritize: Inspect resource path, HTTP method, module data and the absence of PATCH/PUT/POST.

D:

Inspect organization/network policy, controller task status and representative AP behavior. This investigation primarily applies to Controller-level Wi-Fi policy at multiple sites, not the current Interpret RESTCONF configuration retrieval problem. Prioritize: Inspect resource path, HTTP method, module data and the absence of PATCH/PUT/POST.

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

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