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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Prioritize rooms for allocation
System Design: Room Allocation and Ranking Service Context and assumptions: - The client sends a meeting request with: (a) time window or fixed start/...
Compute time for virus to infect grid
This question evaluates a candidate's ability to reason about grid-based state propagation, algorithmic problem solving, and performance consideration...
Solve 12 coding interview problems
Below are multiple independent coding problems. --- Problem 1: Reduce an integer to 0 with \(\pm 2^i\) You are given a positive integer \(n\). In one ...
Compute sums and max path in N-ary tree
This question evaluates implementation and traversal skills for N-ary tree data structures, including recursion/DFS techniques, aggregation of node va...
Count Valid Infection Orders
This question evaluates combinatorial enumeration and algorithmic reasoning by counting valid sequences of state changes in a linear infection process...
Formulate OR model to reduce driver backtracking
Define and reduce driver ‘backtracking’ in a marketplace. First, define a quantitative backtracking metric B per driver-hour from GPS and assignment l...
Explain and validate A/B test assumptions
A/B Test Validity: Core Assumptions, Violations, Diagnostics, and Mitigations You are designing and evaluating an online A/B test for a large, multi-s...
Compute A/B sample size under clustering
A/B Test Sample Size With Unequal Allocation, Clustering, and Attrition Context You are planning a two-arm signup A/B test (binary outcome: convert vs...
Diagnose and reduce first-action drop-offs
Funnel Drop‑Off: Instrumentation, Incentives, Fairness, and Ownership Context You lead a program where candidates must: (1) submit paperwork, then (2)...
Analyze results and large p-values correctly
Experiment Analysis Plan: User-Level ITT with Robust Inference, Variance Reduction, Ratios, Skew, Non-Compliance, and Decision Framework Context You r...
Navigate urgency, priorities, and conflict
Behavioral & Leadership: Ambiguity, Dependencies, and Execution Under Pressure You will describe one real project where you faced high ambiguity and c...
Design an A/B test; choose Z vs T
A/B Test on a Signup Funnel: Sample Size, Test Choice, Sequential Design, and Causal Plan Context You are planning a two-variant A/B test on a signup ...
Apply instrumental variables under interference
IV estimation for a ride‑sharing feature when A/B testing is infeasible due to interference Context You need to estimate the causal effect of a new ri...
Design an experiment with marketplace network effects
Causal Experiment Design for a Two‑Sided Marketplace with Interference You are designing a causal experiment for a new networked product in a two‑side...
Solve BST and Grid Query Problems
This question evaluates understanding of binary search tree order-statistics and grid reachability under threshold constraints, testing competencies i...
Find a Bounded Subarray and Largest Square
Implement the following two independent coding tasks. Task A: Longest bounded-range subarray Given an integer array nums and an integer limit, return ...
Find all dictionary words in a grid
This question evaluates skills in grid traversal, string-search and pattern-matching techniques, recursive backtracking, and the efficient use of data...
Should Uber double member discounts?
This question evaluates competency in causal inference, experimental design, statistical power and sample-size analysis, metric definition, and two-si...
Evaluate a cold-start rating launch
This question evaluates a data scientist's competency in marketplace analytics, causal inference, experimentation design and measurement, specifically...
Can one car serve all riders?
This question evaluates understanding of interval scheduling and conflict detection, testing skills in time-interval reasoning, sorting, and efficient...