I was given a circular array `arr`, where `arr[i]` represents the number of steps I can jump left or right. Given a `from` and `to` index, I needed to find the shortest jump to get from the `from` index to the `to` index. I recognized this as a shortest path p...
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The interviewer started by talking about internal tools and how employees navigate company structure. The question was Return Department Chain by Employee ID: https://www.chillinterview.com/learn/coding-interview-questions/return-department-chain-by-employee-i...
The question I received was: You are given an m x n integer matrix terrain, and an array limits of size k. You must compute an array answer of size k such that for each limits[i]: 1. Start at the top-left cell (0,0). 2. Repeat: * If limits[i] is strictly great...
## Preparation Tips & Key Takeaways ### What I Learned - The importance of speed, accuracy, and depth of understanding of metrics, especially for economics-related questions. - The need to clearly and concisely explain experiment designs and interpret results...
The coding question I got was to implement a Counter class with expiration: ```python class Counter: def __init__(self, window): self.window = window self.data = {} def put(self, element): current_time = time.time() if element in self.data: self.data[element]....
Here is the list of recent Uber system design problems: 1. **Design a chat system** similar to Facebook Messenger. 2. **Design a driver heatmap** for internal Uber employees. The focus was on data storage, processing, and handling historical data, rather than...
## Problem Description I was given a 2D grid representing a map of positions. Some cells contain robots ('O'), others are empty ('E') or blocked ('X'). The edges of the grid are treated as blockers. I was also given an integer array `distance` of length 4, des...
The coding question I got was: ``` You are given a representation of a folder system using three parallel arrays, along with a specific folder ID. The folders together form a **forest** (i.e., multiple independent trees). The inputs are defined as follows: * *...
The interviewer introduced the prompt as a small reservation system. The question was Reserve Study Rooms: https://www.chillinterview.com/learn/coding-interview-questions/reserve-study-rooms. I was asked to reason about room requests, existing reservations, an...
The interviewer asked whether I had recently worked with string manipulation before giving the prompt. The question was Next Symmetric Access Code: https://www.chillinterview.com/learn/coding-interview-questions/next-symmetric-access-code. I was given an acces...
