350-601 Automation Practice Question
What is a key advantage of using structured data (e.g., JSON or XML) from Cisco NX-API responses compared to traditional CLI scraping (e.g., using regular expressions)?
⚠ Common exam trap
Cisco often tests the misconception that structured data eliminates the need for parsing libraries or authentication, but the key advantage is purely about reliability and consistency of machine-readable output versus fragile CLI scraping.
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
✓
It provides machine-readable output that is less prone to parsing errors due to display changes.
Cisco NX-API returns structured data formats like JSON or XML, which are inherently machine-readable and consistent regardless of CLI display changes or software version updates. This eliminates the fragility of traditional CLI scraping with regular expressions, where output formatting changes (e.g., column widths, spacing, or label text) can break parsing logic. Structured data ensures reliable, predictable automation workflows.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
It automatically commits changes to running-config.
Why it's wrong here
Structured data responses do not commit changes automatically.
- ✓
It provides machine-readable output that is less prone to parsing errors due to display changes.
Why this is correct
Structured data is consistent across versions, while CLI output can change with cosmetic updates.
- ✗
It requires no software libraries to parse.
Why it's wrong here
Still requires JSON libraries, but those are standard.
- ✗
It eliminates the need for any authentication.
Why it's wrong here
Authentication is still required.
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Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
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