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The Eviction Policy

A medium Python mock interview question on DataDriven. Practice with AI-powered feedback, real code execution, and a hire/no-hire decision.

Domain
Python
Difficulty
medium
Seniority
mid

Interview Prompt

Our query result cache needs an LRU eviction policy. Build a class called LRUCache with a fixed capacity. get(key) returns the value or -1 if absent. put(key, value) inserts or updates. When full, evict the least recently used entry. Both get and put count as 'use'.

How This Interview Works

  1. Read the vague prompt (just like a real interview)
  2. Ask clarifying questions to the AI interviewer
  3. Write your python solution with real code execution
  4. Get instant feedback and a hire/no-hire decision