Uber Coding & Algorithms Interview Questions
Practice 284 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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Design a pickup-area driver queue
Design an internal service for a ride-hailing company that maintains a driver queue for each pickup area, such as an airport pickup zone or staging lo...
Design a Ride-Hailing ETA System
You are a Data Scientist at a ride-hailing company. Design an ETA system used in the rider and driver apps to estimate both pickup ETA and trip ETA. D...
Count Valid Infection Orders
You are given an integer n representing houses arranged in a line and indexed from 0 to n - 1, and a sorted array infected containing the indices of h...
Detect cycle in directed dependency graph
You are given a directed dependency graph representing services in a system. - There are n services, labeled from 0 to n - 1. - You are given a list o...
Implement a Referral Revenue Tracker
Implement an in-memory revenue tracking system for customers in a referral network. Each customer has their own direct revenue. A customer may also ha...
Solve BST and Grid Query Problems
Solve the following coding problems. Problem A: Find the kth largest value in a BST You are given the root of a binary search tree and an integer k. R...
Design an Uber feature and analyze safety
You are interviewing for a Data Scientist summer internship at a ride-sharing marketplace. Part A: Product case Uber wants ideas for a new rider-facin...
Choose root to minimize edge reversals
Problem You are given a connected graph with n nodes labeled 0..n-1 and n-1 directed edges. If you ignore directions, the edges form a tree (i.e., the...
Group strings that are anagrams
Given an array of strings, group the strings into lists such that each list contains strings that are anagrams of each other. Definition Two strings a...
Analyze Cancellation Change with Statistics
A/B change in cancellation rate (before vs after) Context: You are evaluating a small product tweak intended to reduce cancellations. Treat each trip ...
Describe Conflict and Impact
Prepare strong answers for the following behavioral and project deep-dive questions for a data scientist role: 1. Tell me about a time you went beyond...
Model Driver Acceptance Probability
Design a machine learning system to predict the probability that a driver accepts a trip or delivery offer. Your answer should cover: - the prediction...
Move zeros to front
Given an integer array nums, move all 0 values to the beginning of the array in place while preserving the relative order of all non-zero elements. Re...
Solve BFS and grid tasks
The coding rounds included several algorithmic problems: 1. Threshold search with binary search: You are given floors 1..n and an API canOperate(floor...
Return sorted squares of a sorted array
Problem You are given an integer array nums sorted in non-decreasing order. The array may contain negative numbers. Return a new array containing the ...
Implement Multi-Head Self-Attention
Implement a multi-head self-attention module in PyTorch without using torch.nn.MultiheadAttention. Requirements: - Input tensor shape: (batch_size, se...
Build and assess CTR prediction
CTR Prediction with Delayed Feedback and Extreme Class Imbalance You are building a model to predict the probability that an ad impression results in ...
Solve jump maximization and palindromic path queries
You are given two independent algorithmic problems. --- Problem 1 — Jump game with special destinations (maximize score) You are given an integer arra...
Design Rideshare Marketplace Causal Analyses
You are a data scientist at a ride-hailing marketplace. Answer the following case prompts as if you were advising product, operations, and marketplace...
Find earliest common meeting slot
Question Given the calendars of N attendees, find the earliest time window of length at least d minutes during which all attendees are simultaneously ...