Object-Oriented Programming · OpenAI · Easy
In-Memory Key-Value Database Easy · Hash Table, Design · Company Tags · Hints Design a simple in‑memory database that holds data as key‑value pairs. The database must provide the following capabilities: Insert a brand‑new record with a unique key and an associated value. You can safely assume that no duplicate key is ever inserted. Retrieve (query) the value bound to a given key; if the key isn’t present, return null. Replace (update) the value of an existing record. If the…
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