Uber - VO Prep

Uber Uber Online Assessment Coding Question: Find a Word in a 2D Letter Grid

Given a two-dimensional array of letters, find whether a given word can be written in any one of the 8 directions. In other words, the word may appear h…

Uber Uber VO Interview Question: Island Perimeter

You’re given an R-by-C array of integers that represents a top-down map of a building construction site, where each location in the array represents a o…

Uber Uber VO Coding Interview: Sudoku Validity Check

Sudoku is a number-placement puzzle. The objective is to fill a 9 x 9 grid with digits so that each column, each row, and each of the nine 3 x 3 sub-gri…

Uber Uber VO Interview Coding Question: Design a Backend System for an E-commerce Browsing Experience

Design a backend system for an e-commerce website that shows a list of merchandise. The system should focus on the browsing aspect, not on how to make p…

OA Uber OA Interview Question: Balanced Numbers in a Permutation

Given a permutation p of length n , a number k is balanced if there are two indices l , r ( l <= r ) such that the numbers p[l] , p[l + 1] , …, p[r…

OA Uber OA Interview Question: Count Key Changes While Typing

You are given an array of uppercase and lowercase English letters, recording , representing a sequence of letters typed by the user. Your task is to cou…

OA Uber OA Coding Interview: Count 2×2 Submatrices by Number of Black Cells

For a grid of black and white cells with rows rows and cols columns, you’re given an array black that contains the [row, column] coordinates of all the…

OA Uber OA Interview Question: Can We Make All Degrees Even by Adding at Most Two Edges?

Given an undirected graph graph that is represented by its adjacency matrix, return whether or not it is possible to add no more than two edges to this…

OA Uber OA Interview Question: Even Odd Position Sum

Given an array of integers numbers , compare the sum of elements on even positions against the sum of elements on odd positions (0-based). Return “even”…

OA Uber OA Interview Question: Find the Center of the Largest Perfect X-Shaped Figure

You are given a matrix of integers matrix containing only zeros and ones. Let’s call an x-shape a figure with a center at some cell of matrix and 4 diag…

OA Uber OA Coding Interview: Audiobook Listening with Cyclic Order and Drops

You have an array of integers audiobooks where audiobooks[i] is the amount of time in minutes needed to listen to the i -th audiobook fully. You are lis…

OA Uber OA Interview Question: Resource Cycle Simulation

Each cycle, one of the three events happens: Option 1: If there are at least conversionRate P resources, then the last conversionRate P resources are re…

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