Serialize and deserialize a dictionary trie
Overview
This question evaluates proficiency in trie data structures, serialization/deserialization design, and systems-level concerns such as compact wire formats, explicit end-of-word markers, resilience to malformed or partial input, streaming-friendly encodings, Unicode handling, and forward/backward compatibility.
Design and implement serialization and deserialization for a trie that stores a large dictionary of words. Requirements: compact wire format; explicit end-of-word markers; resilience to malformed or partial input; streaming-friendly encoding; and forward/backward compatibility for future fields. Provide pseudocode for both serialize and deserialize, analyze complexity, and discuss handling of Unicode, optional compression, and memory limits.