Uber Interview Questions
Practice 290 real Uber interview questions for 2026. Covers top categories — Coding & Algorithms, Analytics & Experimentation, Machine Learning, Behavioral & Leadership, Statistics & Math — across Software Engineer, Data Scientist, Machine Learning Engineer, and Technical Program Manager roles. Real questions from actual interviews with detailed solutions, focused guidance, and concrete interview preparation so you can practice the exact problem types Uber asks. Expect a coding-heavy loop for software engineering candidates: timed algorithm problems, online-assessment style OAs, and system-design tasks. For Software Engineer roles the recurring technical themes here are algorithm puzzles (kth-smallest-in-BST, knight/grid and reversal problems, prime-ending path counts), OA-style coding questions, and product-oriented design prompts such as a pickup-area driver queue and global nearby-restaurant search. Data Scientist questions center on membership/discount experiments, cold-start restaurant ratings and their launch evaluation, driver-acceptance modeling, and marketplace-impact analyses. Machine Learning Engineer prompts focus on completion-rate gaps, implementing attention and regression models, feed-ranking and restaurant-recommendation design, and pickup-location optimization. TPM items emphasize delivery-address fixes, competitive product comparisons, and leadership stories. Prepare by timing practice coding, rehearsing marketplace case studies, building short model write-ups, and polishing STAR examples for behavioral rounds.
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Find Earliest Column With One
You are given access to a binary matrix through an API rather than direct storage. The matrix has m rows and n columns. Each row is sorted in nondecre...
Replace Dashes With Nearest Letters
You are given an m x n grid containing only dash characters '-' and alphabetic letters. For every dash cell, replace it with the nearest letter in the...
Design cart management lifecycle service
Scenario You are designing the backend for an on-demand delivery app (restaurants and grocery). Users can create a cart, modify items from multiple de...
Compute max reachable cells per threshold
You are given: - An m x n integer matrix terrain. - An integer array limits of length k. For each query value L = limits[i], you start at the top-left...
Design a Daily Puzzle Platform
Design a backend system for a daily puzzle platform. Users should be able to: - Sign in and view the puzzle of the day. - Submit an answer for the cur...
Design a Parking Garage Object Model
Design an object-oriented model for a multi-level parking garage. The garage should support: - Multiple floors and parking spots. - Different vehicle ...
Solve Wonderful Strings and Grid Queries
Two algorithmic tasks were reported. Task 1: Minimum-cost wonderful string A string is considered wonderful if, among the letters 'a' through 'j', at ...
Explain and test completion-rate gaps
In a food delivery marketplace, alcohol-related orders have a lower order completion rate than non-alcohol orders. Answer the following: 1. Propose se...
Determine balanced k values in a permutation
You are given a permutation p of the integers 1..n. For a number k (where 1 <= k <= n), call k balanced if there exists a contiguous subarray p[l..r] ...
Count Islands After Land Additions
You are given an initially empty m x n grid filled with water. Land is added one cell at a time. Implement a function that receives: - m: number of ro...
Present a Marketplace ML Project Deep Dive
In a Machine Learning Engineer interview for a pricing, marketplace, or growth team, present a recent representative ML project. Your deep dive should...
Implement linear and logistic regression
Explain and implement linear regression and logistic regression from scratch. Your answer should cover: - The prediction function for each model - The...
Design a feed ranking system
Design a machine-learning-based feed ranking system for a consumer product. The system should rank candidate posts or items for a user's home feed in ...
Describe a Trade-off Design Change
Tell me about a time when you changed a system design because of an important trade-off. Explain the original design, the competing goals or constrain...
Implement Last-Click Attribution APIs
Design and implement an in-memory last-click attribution service. There are two event types: - click(timestamp, userId, campaignId) - conversion(times...
Design real-time driver heatmap system
System Design: Real-Time Driver Heatmap and Top-K Hottest Cells Context You are building a real-time heatmap for a ride-hailing platform to show drive...
Schedule Non-Overlapping Meetings Efficiently
Implement a meeting scheduler that stores meetings as half-open intervals [start, end), where start and end are integer timestamps and start < end. Th...
Compare Two Coin Proportions
You are given results from two independent coin-toss experiments: - Coin A was tossed 100 times and landed heads 40 times. - Coin B was tossed 1,000 t...
Find minimal rate k and subset sum
Question LeetCode 875. Koko Eating Bananas — Given vault sizes [3, 6, 7, 11] and time h = 8 hours, find the minimum integer rate k (vault units per ho...
Design cart and pricing engine classes
Design the core classes and interfaces for a cart & pricing engine for a food delivery marketplace (e.g., Uber Eats). The final checkout price is not ...