8. Apply Concepts of Model Driven Programmability (YANG, RESTCONF, and NETCONF) in a Cisco Environment 200-901 Practice Questions (Page 8)

Questions 36–40

1. 36foundation · easy

   In NETCONF, how would you delete a specific configuration node, such as an interface, from the running configuration?

   • AUse the <delete-config> operation with the target node specified.
   • BUse the <get-config> operation with a filter to exclude the node.
   • CUse the <edit-config> operation with the 'operation' attribute set to 'delete'.
   • DUse the <copy-config> operation to overwrite the running configuration without the node.
   Reveal Solution Discussion Select an answer first
2. 37foundation · easy

   Which NETCONF operation is used to retrieve the entire configuration or a specific subtree from a device?

   • A<edit-config>
   • B<get-config>
   • C<copy-config>
   • D<get>
   Reveal Solution Discussion Select an answer first
4. 38foundation · easy

   What is YANG primarily used for in the context of network device management?

   • AA database that stores network device configurations.
   • BA protocol to transport configuration data between systems.
   • CA language to model configuration and state data for network devices.
   • DA scripting language to automate network device configuration.
   Reveal Solution Discussion Select an answer first
5. 39expert · hard

   An engineer is using RESTCONF to configure a Cisco IOS XE device. The engineer sends a PUT request to update a BGP configuration, but receives an HTTP 400 Bad Request error with an error-tag 'invalid-value'. The engineer has verified that the username and password are correct and that the device has RESTCONF enabled. What is the most likely cause of this error?

   • AThe JSON payload contains a value that is not valid for the YANG model, such as an incorrect IP address format.
   • BThe engineer is using HTTP instead of HTTPS.
   • CThe device is rejecting the request because the configuration is locked by another session.
   • DThe device does not have the NETCONF-YANG module installed.
   Reveal Solution Discussion Select an answer first
6. 40expert · hard

   A developer is building a RESTCONF application that must update multiple interface configurations on a Cisco device. The developer wants to ensure that if one interface update fails, none of the updates are applied. Which approach should the developer take?

   • ASend a DELETE request for all interfaces, then a POST to recreate them with the new configuration.
   • BSend a single PATCH request that includes all interface changes in one payload.
   • CSend multiple PUT requests, one per interface, and check each response.
   • DUse NETCONF with the candidate datastore and commit to apply all changes atomically.
   Reveal Solution Discussion Select an answer first