Apple

An engineer called me and began to do the coding exercises. He required me to improve my solution until he was satisfied with it. The questions were not hard, but there were some corner cases.

They asked me a LeetCode-style coding problem that I needed to solve, considering optimization constraints. The interviewer was nice and open to discussing together whenever there was any doubt.

1. Introduce yourself. Describe your projects. Discuss coding to implement a hashmap and what happens with the `put` method in a multi-thread environment. 2. Design Uber Bike. How would you solve scalability issues? 3. Implement an LFU cache.