databricks | Software Engineer | Interview Experience
Interview Date: Not specified
Result: Fail
Difficulty: Neutral to Hard
Interview Process
The interview consisted of four rounds. The first coding round involved a variation of a LeetCode problem, but the details are not well-remembered. The second round focused on system design, where the interviewer asked about implementing ConcurrentHashMap locks to support multithreading and discussed why HashMap is not thread-safe. This round was tricky, with the interviewer providing a lot of information that distracted from the core problem, resulting in limited time to write code.
Technical Questions
- Design a thread-safe ConcurrentHashMap class. (data structure, concurrency, threading, locking)
- Implement compression and decompression functions. (compression algorithm, RLE, Bit-Packing)
Tips & Insights
Be prepared for tricky questions and ensure to focus on the core problem during system design discussions. Time management is crucial, especially when dealing with complex topics.