350-501 Automation and Quality of Service Practice Question
Which THREE YANG data nodes are part of the Cisco-IOS-XR-qos-ma-cfg module for defining a QoS policy-map? (Choose three.)
⚠ Common exam trap
Cisco often tests the distinction between YANG data nodes and module metadata (like namespace URIs), tricking candidates into selecting the namespace as a valid data node when it is merely a module identifier.
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
class
The 'class' YANG data node is defined in the Cisco-IOS-XR-qos-ma-cfg module to specify a traffic class within a QoS policy-map. This node allows you to associate a class-map with the policy, enabling differentiated treatment of traffic based on classification criteria.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
class
Why this is correct
Correct: The 'class' node groups match and actions.
- ✗
urn:cisco:params:xml:ns:yang:Cisco-IOS-XR-qos-ma-cfg
Why it's wrong here
This is the module namespace, not a data node.
- ✓
shape
Why this is correct
Correct: Defines shaping parameters.
- ✓
police
Why this is correct
Correct: Defines policing parameters.
- ✗
interface
Why it's wrong here
This belongs to the interfaces module.
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JA
Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
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