10. Interpret the Results of a RESTCONF or NETCONF Query 200-901 Practice Questions (Page 7)

Questions 31–35

1. 31expert · hard

   A RESTCONF PUT request to replace the configuration of an interface returns HTTP 409 with an error-tag of 'data-exists'. What does this indicate?

   • AThe request was malformed.
   • BThe target resource already exists and the PUT cannot create it.
   • CThe server does not support PUT operations.
   • DThe request was successful and the data was replaced.
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2. 32application · medium

   A network engineer sends a RESTCONF GET request to retrieve the hostname of a router. The response includes HTTP status code 200, a Content-Type header of application/yang-data+json, and a body containing {"Cisco-IOS-XE-native:native":{"hostname":"R1"}}. What does this response indicate?

   • AThe request failed because the router does not support JSON encoding.
   • BThe request failed because the YANG module name is missing from the payload.
   • CThe request succeeded and the hostname is R1.
   • DThe request succeeded but the hostname is empty because the leaf is not present.
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4. 33expert · medium

   An engineer uses RESTCONF to retrieve only the 'mtu' and 'description' leafs for all interfaces. The engineer sends a GET to /restconf/data/interfaces with the query parameter fields=interface/mtu;interface/description. The response contains only those leafs for each interface. What is the most accurate interpretation?

   • AThe request was malformed, but the server chose to return the leafs anyway.
   • BThe device only has mtu and description configured on its interfaces.
   • CThe fields parameter is not supported by the device, so the server returned a partial response.
   • DThe fields parameter successfully filtered the response to the requested leafs.
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5. 34expert · medium

   A RESTCONF DELETE request to remove an interface returns HTTP 404 with an ietf-restconf:errors body. The error-tag is 'data-missing' and error-message is 'Resource does not exist'. What is the most likely cause?

   • AThe client lacks permission to delete the interface.
   • BThe interface is in use and cannot be deleted.
   • CThe interface was already deleted or never existed.
   • DThe request body was invalid.
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6. 35expert · hard

   A NETCONF <get> request uses a filter to select /interfaces/interface[name='GigabitEthernet0/1']/ipv4/address. The reply contains <data><interfaces><interface><name>GigabitEthernet0/1</name><ipv4><address><ip>192.0.2.1</ip><prefix-length>24</prefix-length></address></ipv4></interface></interfaces></data>. What does this response show?

   • AThe filter was ignored because NETCONF filters cannot select list elements by key.
   • BThe response is invalid because the interface name should not be included.
   • CThe filter selected the address list, and the response includes the parent interface name for context.
   • DThe response includes all addresses for all interfaces.
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