Uber Software Engineer Coding & Algorithms Interview Questions
Practice 118 real Coding & Algorithms interview questions for Software Engineer roles at Uber.
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Maximize Minimum Scaled Value
This question evaluates algorithmic optimization and resource-allocation skills, focusing on integer scaling under a global budget to maximize the min...
Track Customer Referral Revenue
This question evaluates understanding of dynamic data structure design and algorithms for maintaining aggregated metrics over a referral tree, specifi...
Simulate and Construct Tournament Rankings
You are given a single-elimination tournament represented by an array of ranks. The array is a permutation of the integers 1..n, where a smaller numbe...
Implement an expiring counter class
This question evaluates a candidate's competency in implementing a sliding-window expiring counter, testing knowledge of streaming algorithms, data st...
Solve Knight and Reversal Problems
The online assessment contained two coding problems: 1. Generalized knight shortest path: Given an integer n, consider an n x n chessboard with coordi...
Design top-K tracker with linked lists
Design top-K tracker with linked lists Design a data structure that tracks the top-K most frequent keys in a stream. Support operations increment(key)...
Simulate fixed-shape tiling on a grid
You are given an empty n-by-m grid and a list of tile patterns, patterns[0..k-1]. Each pattern is a binary matrix (1 = filled cell, 0 = hole) and must...
Simulate views on an n-ary tree
Given a rooted, ordered n-ary tree (each node has a value and an ordered list of children), simulate an observer who starts at the bottom-left, moves ...
Find the First Unique Log
This question evaluates a candidate's ability to analyze and implement efficient data-processing and frequency-detection strategies on ordered string ...
Produce a valid deployment order
You are given N services and a list of dependency pairs (A, B) meaning service B must be deployed before service A. Compute any valid deployment order...
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...
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...
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. -...
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...
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 ...
Bracket substrings matching any pattern
This question evaluates string manipulation and pattern-matching competency, including substring search, prioritization rules for leftmost and longest...
Find next and closest palindromes
Given a non-negative integer represented as a string n (no leading zeros unless n == "0"), return the smallest palindromic integer strictly greater th...
Find leftmost point of maximum brightness
You are given an array of lights, where each light is [p, r] representing a lamp centered at coordinate p on the real number line with radius r, illum...
Return sorted squares of a sorted array
This question evaluates array-processing and algorithmic optimization skills, including handling negative values, element-wise transformations, and pr...