5.4 Describe the High-Level Principles and Benefits of a Data Modeling Language, Such as YANG 350-501 Practice Questions (Page 5)

Questions 21–25

1. 21foundation · easy

   Which statement best describes the structure of a YANG data model?

   • AIt is a flat list of key-value pairs with no hierarchy
   • BIt is a hierarchical tree structure that can be organized into modules and submodules
   • CIt is a set of command-line instructions for device configuration
   • DIt is a relational database schema with tables and foreign keys
   Reveal Solution Discussion Select an answer first
2. 22foundation · easy

   Which characteristic is a key benefit of using a data modeling language like YANG for network configuration?

   • AIt eliminates the need for network engineers to understand CLI commands
   • BIt allows configuration data to be described in a structured format that can be validated and processed by automation tools
   • CIt ensures that configuration data is human-readable only, preventing accidental changes
   • DIt automatically optimizes network performance without human intervention
   Reveal Solution Discussion Select an answer first
4. 23foundation · easy

   In YANG, what is the purpose of defining data types and constraints in a model?

   • ATo provide a graphical representation of the data model
   • BTo ensure that data values conform to the expected format and range, enabling validation
   • CTo encrypt data values for secure transmission
   • DTo determine the transport protocol used for data exchange
   Reveal Solution Discussion Select an answer first
5. 24application · medium

   A service provider is moving from manual CLI configuration to an automated system. The automation team needs to ensure that configuration changes are consistent and error-free across the network. Which capability of YANG directly supports this goal?

   • AYANG ensures that all devices have identical configurations.
   • BYANG automatically generates CLI commands for any device.
   • CYANG provides a way to validate data before it is applied to devices.
   • DYANG replaces the need for any network monitoring.
   Reveal Solution Discussion Select an answer first
6. 25application · medium

   A YANG module defines a list of VPN instances, each with a unique name. The module uses a 'key' statement to identify the list's key leaf. What is the purpose of the 'key' statement in this context?

   • AIt makes the list read-only.
   • BIt specifies which leaf uniquely identifies each entry in the list.
   • CIt defines the default value for the list entries.
   • DIt restricts the list to a maximum number of entries.
   Reveal Solution Discussion Select an answer first