Uber Coding & Algorithms Interview Questions
Practice 303 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 minimum activations to absorb all balls
You are given n balls on a 2D plane, where ball i is at coordinate \((x_i, y_i)\). You are also given a distance threshold d. Two balls are considered...
Implement FizzBuzz
This question evaluates a candidate's ability to implement basic control flow, use modulo operations, iterate over sequences, and reason about time an...
Find Kth Smallest in BST
You are given the root of a binary search tree and an integer k. Return the value of the node that would appear in the kth position if all node values...
Find possible robot positions
This question evaluates a candidate's ability to reason about grid traversal, boundary conditions, directional visibility counting, and constraint-bas...
Count connected islands using Union-Find
You are given an m x n grid of characters where '1' represents land and '0' represents water. An island is a group of horizontally or vertically adjac...
Compute max reachable cells per threshold
This question evaluates a candidate's ability to reason about constrained grid reachability and efficient handling of multiple threshold queries, test...
Check if each prefix forms 1..k permutation
You are given an integer array arr of length n that is a permutation of the numbers 1..n (each number appears exactly once), but in arbitrary order. F...
Solve these algorithmic problems
You are given the following independent coding tasks. For each task, design an algorithm and implement a function that returns the requested output. -...
Find minimum reversals to orient edges away from root
You are given a connected graph with n nodes labeled 0..n-1 and n-1 directed edges. If you ignore edge directions, the edges form a tree. Each directe...
Compute final prices with next smaller discount
You are given an integer array prices of length n, where prices[i] is the original price of the i-th item. For each item i, find the first index j > i...
How would you design an ETA prediction system?
This question evaluates a data scientist's capability to design an end-to-end ETA prediction system, testing competencies in machine learning modeling...
Move zeros to the front
Given an integer array nums, move all elements equal to 0 to the beginning of the array while preserving the relative order of all non-zero elements. ...
Solve Prime Jumps and Pipeline Scaling
An online assessment contains two independent coding problems. Solve both. Problem 1: Prime-Constrained Score Jump You are given an integer array scor...
How should Uber evaluate lower ETA?
This question evaluates competency in metrics design, causal inference, and experiment strategy for two-sided marketplaces, including detecting and ad...
Find shortest jumps in circular array
You are given a circular array arr of length n. From index i, you may jump exactly arr[i] steps either to the left or to the right (wrapping around th...
Return a Package Build Order
You are given an API: `python get_dependencies(package) -> list[str] ` It returns the direct dependencies of a given package. If package A depends on ...
Find earliest time all riders become connected
This question evaluates graph connectivity and dynamic event-processing skills, testing conceptual understanding of connectivity in undirected graphs ...
Move zeros to front
This question evaluates array manipulation and in-place algorithm skills, specifically competency in stable element reordering, index management, and ...
Determine Threshold-Constrained Connectivity
This question evaluates understanding of graph algorithms and constrained connectivity, testing skills in reasoning about weighted undirected graphs, ...
Track Customer Referral Revenue
This question evaluates understanding of dynamic data structure design and algorithms for maintaining aggregated metrics over a referral tree, specifi...