The correct action is to use the NETCONF hello message capability discovery to verify which YANG modules the device supports. During the initial NETCONF session handshake, both the client and server exchange a hello message that includes a list of capabilities, specifically the supported YANG models encoded as URIs. This is the standard, protocol-defined method for discovering device capabilities, as specified in RFC 6241, and it directly addresses the scenario where an automation script fails due to an unsupported YANG model. On the Cisco SPCOR 350-501 exam, this concept tests your understanding of NETCONF’s base operations and how to troubleshoot automation failures in service provider environments like MPLS L3VPN provisioning. A common trap is assuming that device documentation or CLI commands like "show yang models" are sufficient, but the exam emphasizes that the hello exchange is the authoritative, programmatic way to confirm capability support. Memory tip: think of the NETCONF hello as a digital handshake where both parties immediately show their ID cards—the capabilities list—before any work begins.
350-501 Automation and Assurance Practice Question
This 350-501 practice question tests your understanding of automation and assurance. The scenario asks you to isolate a root cause — eliminate options that address a different problem before choosing. After answering, compare your reasoning against the explanation and wrong-answer breakdown below. Once you have made your selection, read the full explanation to reinforce the concept and understand why each distractor is designed to mislead on exam day.
A service provider is automating the provisioning of MPLS L3VPNs across multiple devices using NETCONF. During a deployment, the automation script fails with an error indicating that the device does not support the required YANG model. Which action should the engineer take to verify device capabilities?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Use the hello message exchange to check supported YANG modules via capabilities.
NETCONF hello message exchange includes the list of supported YANG modules in the capabilities. This is the standard way to discover device capabilities. Other options are either not standard or would not provide the required information.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
✓
Use the hello message exchange to check supported YANG modules via capabilities.
Why this is correct
The NETCONF hello message includes capabilities such as supported YANG models, making this the correct approach.
Related concept
Read the scenario before looking for a memorised answer.
✗
Use CLI show command to list YANG models.
Why it's wrong here
While some devices may have a show command, it is not standardized and not the recommended method for NETCONF automation.
✗
Use RESTCONF with GET to retrieve device capabilities.
Why it's wrong here
RESTCONF does not have a standard way to retrieve capabilities; the hello exchange is NETCONF-specific.
✗
Use SNMP to check device OID.
Why it's wrong here
SNMP does not directly indicate YANG model support; it uses OIDs from MIBs, not YANG.
Common exam traps
Common exam trap: answer the scenario, not the keyword
Many certification questions include familiar terms but test a specific constraint. Read the exact wording before choosing an answer that is generally true but wrong for this case.
Trap categories for this question
Command / output trap
While some devices may have a show command, it is not standardized and not the recommended method for NETCONF automation.
Detailed technical explanation
How to think about this question
This question should be treated as a scenario, not a definition check. Identify the problem, the constraint and the best action. Then compare each option against those facts.
KKey Concepts to Remember
Read the scenario before looking for a memorised answer.
Find the constraint that changes the correct option.
Eliminate answers that are true in general but not in this case.
Use explanations to understand the rule behind the answer.
TExam Day Tips
→Underline the problem statement mentally.
→Watch for words such as best, first, most likely and least administrative effort.
→Review why wrong options are wrong, not only why the correct option is correct.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
How this comes up in practice
A practitioner preparing for the 350-501 exam encounters this exact type of scenario on the job. The correct answer here is not the most general option — it is the best answer for the specific constraint described. Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option. Real exam questions reward reading the full scenario before eliminating options, because the constraint defines which answer fits.
What to study next
Got this wrong? Here's your next step.
Identify which 350-501 exam domain this question belongs to, then review the specific concept being tested. Practise related questions in that domain and focus on understanding why each wrong answer is tempting — not just why the correct answer is right.
Automation and Assurance — This question tests Automation and Assurance — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Use the hello message exchange to check supported YANG modules via capabilities. — NETCONF hello message exchange includes the list of supported YANG modules in the capabilities. This is the standard way to discover device capabilities. Other options are either not standard or would not provide the required information.
What should I do if I get this 350-501 question wrong?
Identify which 350-501 exam domain this question belongs to, then review the specific concept being tested. Practise related questions in that domain and focus on understanding why each wrong answer is tempting — not just why the correct answer is right.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
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Question Discussion
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