Uber
64 questions · 55 coding · 9 design
Alien Dictionary
Reported Jun 2026 · Also asked at Airbnb, Waymo
Balanced Numbers in a Permutation
Reported May 2026
Basic Calculator
Reported Apr 2026 · Also asked at Microsoft, Netflix
Design a Pickup Area Driver Queue
Reported Mar 2026
Best Time to Buy and Sell Stock
Reported Mar 2026 · Also asked at Amazon, Apple +3
Binary Tree Longest Consecutive Sequence II
Reported Feb 2026
Bus Routes
Reported Jun 2026 · Also asked at Pinterest
Checking Existence of Edge Length Limited Paths
Reported Mar 2026
Construct Quad Tree
Reported Dec 2026
Count Paths That Can Form a Palindrome in a Tree
Reported Apr 2026
Customer Revenue and Referral Tracking
Reported Apr 2026
Design a Stock Price Alert Notification System
Reported May 2026 · Also asked at SoFi
Design an Online Shopping Cart
Reported May 2026 · Also asked at DoorDash
Design Driver Heatmap
Reported May 2026
Design Hit Counter
Reported May 2026 · Also asked at Affirm, Apple +1
Design Messenger
Reported Jun 2026 · Also asked at Meta
Design Parking Lot (OOD)
Reported Jun 2026
Design Popular Products for a Shopping Homepage
Reported May 2026
Earliest Time to Connect All Riders
Reported May 2026
Final Prices With a Special Discount in a Shop
Reported Feb 2026
First Unique Number
Reported Jul 2026
Fraud Detection System
ML System Design · Reported Apr 2026 · Also asked at Amazon, DoorDash +4
Generate 2D Minesweeper Grid
Reported May 2026
Implement Linear and Logistic Regression
ML Coding · Reported Apr 2026
Jump Game Variant
Reported May 2026
K Shuttle Pickup Locations
ML Coding · Reported Nov 2025
Kth Smallest Element in a BST
Reported Apr 2026
Leftmost Column with At Least a One
Reported Jun 2026
Letter Combinations of a Phone Number
Reported Mar 2026 · Also asked at Chime, Dropbox +1
Longest Continuous Subarray With Absolute Diff Less Than or Equal to Limit
Reported May 2026
Lowest Common Ancestor of a Binary Tree
Reported Feb 2026 · Also asked at Amazon, Atlassian +1
Maximize Pipeline Throughput
Reported Jun 2026
Maximum Number of Points from Grid Queries
Reported May 2026
Meeting Rooms
Reported May 2026 · Also asked at Netflix
Meeting Rooms II
Reported Feb 2026 · Also asked at Atlassian, Roblox +4
Merge Step Functions of (timestamp, value) Pairs
Reported Apr 2026
Minimum Knight Moves
Reported Mar 2026 · Also asked at Citadel, Waymo
Minimum Length Subarray With At Least K Distinct Integers
Reported Jan 2026
Minimum Operations to Reduce an Integer to 0
Reported Apr 2026
Minimum Reversal
Reported May 2026
Minimum Time to Absorb All Balls
Reported Jun 2026
My Calendar I
Reported Jun 2026
Number of Islands
Reported May 2026 · Also asked at Amazon, Apple +6
Number of Islands II
Reported Jun 2026
OOD Counter Class
Reported Jan 2026
Palindrome Ancestor Path Queries
Reported Apr 2026
Purchase Optimization
Reported Mar 2026
PyTorch Multi-Head Self-Attention
ML Coding · Reported Mar 2026
Recommendation / Ranking System
ML System Design · Reported Apr 2026 · Also asked at Airbnb, Amazon +4
Reorder Routes to Make All Paths Lead to the City Zero
Reported May 2026
Robots Matching Blocker Distances
Reported Jun 2026
Rotting Oranges
Reported Feb 2026 · Also asked at Amazon
Shortest Word Distance
Reported Mar 2026
Sqrt(x)
Reported Apr 2026
Squares of a Sorted Array
Reported Mar 2026
Strictly Convex Function Minimum
Reported May 2026
Time Based Key-Value Store
Reported Mar 2026 · Also asked at Confluent
Top K Frequent Elements
Reported Apr 2026 · Also asked at NVIDIA, SoFi
Toy Order Completion Analysis
ML Coding · Reported Apr 2026
Uber Eats Search
ML System Design · Reported May 2026
Vertical Order Traversal of a Binary Tree
Reported Mar 2026
Word Search
Reported Jul 2026 · Also asked at Atlassian, PayPal +3
Word Search II
Reported Apr 2026 · Also asked at Airbnb, Reddit +2
Zero Array Transformation
Reported Apr 2026