Techpath data engineering interview questions are the cleanest fundamentals + production-pattern Python loop you'll see in a DE interview. Expect mostly straightforward Python: list-as-queue simulations , tuples and indexing for structured records, aggregation over tuples , hash-table set operations for inventory reconciliation, conditionals and comparison operators for priority classification, nested conditionals with membership testing for routing, functions with tuple-based return values , and CSV processing + exception handling + file I/O + log aggregation for production-flavored data loading. No SQL, no graph algorithms, no dynamic programming—just Python idioms and production patterns. This guide walks through the eight topic clusters Techpath actually tests, each with a detailed topic explanation , per-sub-topic explanation with a worked example and its solution , and an interview-style problem with a full solution that explains why it works.…