Optimize with caching or hash maps
Company: Amazon
Role: Software Engineer
Category: Coding & Algorithms
Difficulty: Medium
Interview Round: Technical Screen
Given your implementation, identify where caching or a dictionary/hash map would improve performance. What are the cache keys and values, expected hit rate, and eviction policy? Analyze the time and space complexity before and after adding the cache, and describe any consistency or staleness trade-offs.
Quick Answer: This question evaluates a candidate's ability to apply caching and hash map data structures to improve algorithmic performance, including identifying appropriate cache keys and values, estimating hit rates, selecting eviction policies, and comparing time and space complexity before and after caching.
