11. Interpret Basic YANG Models 200-901 Practice Questions (Page 3)

Questions 11–15

1. 11application · medium

   A network engineer is examining a YANG module that models a physical interface. The module contains: container interfaces { list interface { key "name"; leaf name { type string; } leaf admin-status { type enumeration { up; down; } } leaf speed { type uint32; } } }. The engineer wants to retrieve the admin-status of the interface named 'eth0'. Which XPath expression correctly selects this leaf?

   • A/interfaces/interface[name='eth0']/admin-status
   • B/interface[name='eth0']/admin-status
   • C/interfaces/interface/admin-status[name='eth0']
   • D/interfaces/interface/admin-status
   Reveal Solution Discussion Select an answer first
2. 12expert · hard

   A YANG module defines a leaf 'priority' with type 'uint8' and a leaf 'description' with type 'string'. An automation script needs to set the priority to 256 and the description to 'high priority'. The script sends a NETCONF edit-config operation. What will happen?

   • AThe operation fails because the description is too long.
   • BThe operation succeeds and sets the priority to 256.
   • CThe operation succeeds but silently truncates the priority to 255.
   • DThe operation fails with a data validation error because 256 is out of range for uint8.
   Reveal Solution Discussion Select an answer first
4. 13foundation · easy

   Which statement best describes how YANG models are used in network automation?

   • AThey provide a vendor-neutral way to describe device configuration and operational state
   • BThey are proprietary to a single network vendor and cannot be shared
   • CThey are executable scripts that run on network devices to automate tasks
   • DThey are used only for monitoring traffic flows and do not affect configuration
   Reveal Solution Discussion Select an answer first
5. 14application · medium

   A network automation team is designing a system to manage network devices from multiple vendors. They want to use a single set of automation scripts to configure interfaces, regardless of the underlying device OS. Which approach best achieves this goal?

   • AUse vendor-specific CLI commands with a common abstraction layer.
   • BUse NETCONF with standard YANG models like IETF or OpenConfig.
   • CUse SNMP with vendor-specific MIBs.
   • DUse RESTCONF with each vendor's proprietary REST API.
   Reveal Solution Discussion Select an answer first
6. 15application · medium

   A network operations team is comparing automation approaches for a multi-vendor environment. They need to programmatically retrieve interface statistics and configuration from devices made by three different vendors. The team wants a single, structured data model that is consistent across vendors and supports standard CRUD operations. Which approach best meets these requirements?

   • AUse YANG models with NETCONF or RESTCONF
   • BUse SNMP with vendor-specific MIBs
   • CUse vendor-specific CLI parsers and screen scraping
   • DUse a proprietary API from one vendor
   Reveal Solution Discussion Select an answer first