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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Compute square root to 1 decimal
Problem Given a non-negative real number x, implement a function sqrt1dp(x) that returns \(\sqrt{x}\) rounded (or truncated—clarify with interviewer) ...
Solve vault rate and subset-sum
1) Robber vaults rate: You are given an array vaults of positive integers where vaults[i] is the amount in the i-th vault, and an integer h (hours). I...
Design top-K frequency structure
Design an in-memory data structure that supports: add(x) to observe an item, inc(x) to increment its frequency, dec(x) to decrement (deleting when zer...
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 ...
Implement rate limiter, top-K, scheduler algorithms
Question Design and implement a thread-safe Rate Limiter; extend it to support multi-threading and a version where current time is not passed as an ar...
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...
Evaluate New Model's Impact on Rider and Driver Experience
Evaluate New Model's Impact on Rider and Driver Experience Airport Pickups ETA Model: Evaluation and Experiment Design Context A new model predicts ri...
Parse and evaluate nested expressions with validation
Design and implement a parser/evaluator for a parenthesized expression language where the input string may be invalid. The language uses spaces as tok...
Simulate robot on grid with obstacles
Simulate robot on grid with obstacles A robot starts at (0, 0) on an unbounded integer grid. You are given a sequence of commands consisting of charac...
Evaluate Auto-Play Impact with Key Metrics and Experiment Design
Evaluate Auto-Play Impact With Metrics and Experiment Design A streaming platform is considering auto-playing the next episode to improve engagement. ...
Thread-Safe Token-Bucket Rate Limiter
Thread-Safe Token-Bucket Rate Limiter Design and implement a thread-safe rate limiter using the token bucket algorithm. The limiter is shared by many ...
Sort a String of Clothing Sizes
Sort a string containing only S, M, and L into size order in linear time. Extend the discussion to custom token orderings, unknown-size behavior, empt...
Reconstruct the Alphabet Order of an Alien Language
This question tests graph construction and topological sorting, core algorithmic skills for reasoning about partial orderings derived from constraints...
Maximize Throughput and Count Trigger Components
This question evaluates proficiency in algorithmic optimization under resource constraints (maximizing pipeline throughput within a budget) and in mod...
Replace Dashes With Nearest Letters
This question evaluates a candidate's competence in grid traversal, distance computation using Manhattan metrics, and handling tie-breaking rules incl...
Find Earliest Column With One
This question evaluates algorithmic problem-solving and optimization skills for working with a row-wise sorted binary matrix accessed via an API, focu...
Implement Last-Click Attribution APIs
This question evaluates a candidate's ability to implement stateful, time-windowed event matching and attribution, testing skills in data structures, ...
Implement Minesweeper and Word Search
This multi-part prompt evaluates grid-based algorithmic skills, including randomized board construction with neighbor counting, straight-line pattern ...
Implement Store Autocomplete
This question evaluates string matching, prefix search, and data structure selection skills by requiring an autocomplete method that returns entries b...
Implement a Constant-Time Random Pool
This question evaluates a candidate's ability to design and implement an efficient data structure supporting average O(1) add, remove, and uniform ran...