Idempotent Automation Scripts | Dataford Interview Questions

What is your strategy for writing idempotent automation scripts?

Implement the strategy for resource operations. Each operation must produce the same final state when replayed any number of times. ensure_present creates or replaces a resource configuration, while ensure_absent removes it if present.

Input: initial_state, a dictionary from resource names to configuration dictionaries, and operations, a list of operation dictionaries. Output: a new dictionary representing the final state. Do not mutate initial_state.

Constraints

0 <= len(initial_state) <= 1000
0 <= len(operations) <= 1000
Resource names are non-empty strings
Each operation action is either ensure_present or ensure_absent
Each ensure_present operation contains a configuration dictionary
Configurations contain JSON-compatible values

Function Signature

def apply_operations(initial_state, operations):

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Problem

What is your strategy for writing idempotent automation scripts?

Constraints

0 <= len(initial_state) <= 1000
0 <= len(operations) <= 1000
Resource names are non-empty strings
Each operation action is either ensure_present or ensure_absent
Each ensure_present operation contains a configuration dictionary
Configurations contain JSON-compatible values

Function Signature

def apply_operations(initial_state, operations):

Your question is Idempotent Automation Scripts. Start with the requirements in the Question tab.

Run and submit as often as you like. When you're ready, talk me through your approach or go straight to the code.