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DevOps / Ansible Interview questions

How is variable precedence resolved in Ansible?

Because the same variable name can be set in role defaults, inventory, play vars, facts, and command-line extra vars simultaneously, Ansible defines a strict precedence order so the outcome is deterministic rather than depending on file-read order.

From lowest to highest precedence (simplified): role defaults, inventory file vars, inventory group_vars/host_vars, playbook vars, role/include vars, block/task vars, registered variables and facts, and finally command-line -e extra vars, which always win over everything else. This ordering exists so that a role can ship sensible fallback defaults (lowest precedence) that a consuming playbook or inventory can override, while still allowing an operator to force a specific value at runtime via -e regardless of what's set anywhere else in the codebase - useful for one-off overrides during troubleshooting without editing any files.

Which variable source has the lowest precedence, meant as an overridable fallback?
Why is having a strict, deterministic precedence order useful?

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