Compare Two Structs / Classes for Equality

Onsite coding prompt: write a simple implementation to compare two structs / classes and decide whether they are identical. The source gives only the high-level task, so clarify field traversal, nested objects, arrays, nulls, and custom equality rules before coding. Requirements Input: two struct / class instances. Output whether the two objects should be considered identical. Clarify the equality contract before implementing: compare by value versus identity, which fields count, and how nested objects are handled. Clarify collection fields, nullable fields, floating-point fields, and cycles if the language / object model allows references. Notes The prompt was described only at a high level, so the interview value is in requirements clarification and robust test coverage. Treat this as a practical coding exercise, not a LeetCode-style algorithm puzzle. Preparation Practice implementing deep equality for nested dictionaries / objects with lists and scalar values. Prepare tests for missing fields, reordered fields, nested objects, null, and repeated references. Be ready to state when the implementation intentionally uses shallow equality.