200-901 Question #157: Real Exam Question with Answer & Explanation

Question

What is a benefit of a model-driven approach for infrastructure automation?

Options

• Aenforces the generation of all automation scripts through the modeling environment
• Bprovides a small learning curve and helps system administrators with limited coding experience
• Censures that system administrators gain a good understanding of coding and expand their
• Denables a user to understand a declarative language to translate the model into an actionable

Explanation

A model-driven approach to infrastructure automation uses a formal data model as the authoritative source that enforces and generates all automation scripts, ensuring consistency. The model prevents manual ad-hoc changes that could cause configuration drift.

Common mistakes.

• B. A model-driven approach typically has a steeper, not smaller, learning curve because administrators must learn the modeling language and associated toolchain in addition to the infrastructure being automated.
• C. While incidental coding knowledge may be gained, the purpose of a model-driven approach is to abstract and enforce infrastructure definitions, not specifically to expand administrators' coding skills.
• D. Understanding a declarative language to translate models into actions describes a characteristic of declarative IaC tools in general, and does not capture the defining benefit of the model-driven approach, which is enforcement of script generation through the model itself.

Concept tested. Model-driven infrastructure automation with YANG data models

Reference. https://developer.cisco.com/docs/ios-xe/model-driven-telemetry/

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