Uber Interview Questions

Note: ensure you read the disclaimer on the previous page reading the accuracy and sourcing of these problems.

Max Rectangle in a Histogram

We're given a histogram like the following, where contiguous sharing a common border or touching bars are made up of different heights. Let's assume all bars have the same width. The histogram is converted to an array of the heights of the bars: js const histArr 3, 1, 4, 2, 2, 1 ...

Difficulty: 8/10

Merge Two Binary Trees

Merging Two Binary Trees The Problem Statement You are presented with two binary trees. Your task is to merge these trees into a single, new binary tree. ! Merging Binary Trees https: storage.googleapis.com algodailyrandomassets curriculum trees merge two binary trees cover image.png ...

Difficulty: 5/10

Build a Calculator

Let's build a very basic calculator by programming it! You've probably seen one that look similar to this: But we won't be building a physical calculator HardwareDaily will need to wait! instead, we'll be writing a simple program that can serve as one. Can you write a function that will evalua...

Difficulty: 7/10

Targets and Vicinities

You're playing a game with a friend called **Target and Vicinity**. *Target and Vicinity* consists of one person thinking up a number in their head, and the other guessing that number. Sounds simple enough the caveat is that we also want to credit close guesses. To estimate the proximity of the ...

Difficulty: 6/10

Contiguous Subarray Sum

Given an array of numbers, return true if there is a subarray that sums up to a certain number n . A subarray is a contiguous subset of the array. For example the subarray of 1,2,3,4,5 is 1,2,3 or 3,4,5 or 2,3,4 etc. js const arr 1, 2, 3 , sum 5 subarraySum arr, sum...

Difficulty: 4/10

Max Product of Three Numbers

Given an unsorted array of integers, can you write a method maxProductOfThree unsorted: array to find the largest product from three of the numbers? For example, given the following array: 1, 9, 22, 3, 15, 7 The largest product of three numbers is 2310 . This results from 15 * 7 * 22 ...

Difficulty: 5/10

Design A Least Recently Used (LRU) Cache

A cache pronounced cash is a place of storage that allows for faster data retrieval. Separate from the main data storage, it's usually faster memory that houses frequently accessed values. With a cache in place, when a client application needs to access data, it'll check the cache first befo...

Difficulty: 7/10

Implement a Hash Map

Arrays are amazing for looking up elements at specific indices as all elements in memory are contiguous, allowing for O 1 or constant time lookups. But often we don't, or can't, perform lookups via indices. Hash maps and hash tables are a way around this, enabling us to lookup via keys instead. ...

Difficulty: 3/10

Is An Anagram

Understanding Anagrams: A Simple Definition An anagram is a fascinating literary device where you can rearrange the letters of a word, phrase, or name to form another meaningful sequence. Think of it as a jigsaw puzzle made of letters. For example, the word "cinema" can be rearranged to form "ice...

Difficulty: 3/10

Matrix Operations

Here's a fun one: let's say we have a 2D array matrix that is a size of m rows and n columns. It is initially prefilled with 0 s and looks like the following: js 0, 0, 0, 0 , 0, 0, 0, 0 , 0, 0, 0, 0 We are then given a list of increment operations to be performed on ...

Difficulty: 7/10

Examining the Uber Architecture

This tutorial introduces Uber's journey from a Monolithic architecture to a Service Oriented Architecture and their use of the Google S2 Library to model maps and location data. It explains how Uber has been able to improve performance by replacing their architecture with DISCO Dispatch optimizat...

Difficulty: 5/10

Ringpop at Uber

Exploring Ringpop: The Backbone of Uber's Scalability Setting the Stage: The Importance of Ringpop Uber operates on a massive scale, handling enormous amounts of traffic and user requests daily. The architecture behind this is no small feat, and one of the key components making it all po...

Difficulty: 5/10

Interview Reports

Meet Uber's Software Engineer Apprentices...

Software Engineer

Uber's Software Engineer Apprentice Program gives developers with non-traditional paths to programming an opportunity to work on industry-level software while receiving extended training and mentorshi...

How I went from newbie to Software Engineer in 9 months while working full ...

Software Engineer

Advancing your career within a start-up or small company can be challenging—after all, there aren't many positions to move into. But Austin Geidt, Uber's Head of Launch, did it, and she shares her advice for anyone wanting to do the same.

How I Advanced My Career at a Start-up: Uber's Austin Geidt...

Head Of Strategy

Advancing your career within a start-up or small company can be challenging—after all, there aren't many positions to move into. But Austin Geidt, Uber's Head of Launch, did it, and she shares her adv...

I signed an offer with Uber two weeks ago for full-time software development. During my interview process, I’ve witnessed much confusion on what a resume “should” look like: It’s not flashy, it’s…

The resume that got me a job with Uber...

Software Developer

I signed an offer with Uber two weeks ago for full-time software development. During my interview process, I’ve witnessed much confusion on what a resume “should” look like: It’s not flashy, it’s…

How I got a design job at Uber (Take Home Assignment)...

Design Engineer

All the opinions expressed are mine and not of my employer Uber. Similarly, the ideas are not just applicable to Uber but can be applied to any other company with minor tweaks. Most of the advice is…

How to get a Job interview at Uber[Google/Facebook/Amazon)...

Software Developer

All the opinions expressed are mine and not of my employer Uber. Similarly, the ideas are not just applicable to Uber but can be applied to any other company with minor tweaks. Most of the advice is…

People at Uber Say

This information was sourced from reviews originally posted on Glassdoor.

Working at Uber, you feel that you have been select to a revolution, to change the way people move in the world. Just some of good aspects are: - Talented people - Engineering challenges at scale that actually impacts people lives - Startup energy even after tremendous growth so far - Compensation & Benefits are one of the best in the region. Company is still growing fast, so you are always keeping up with the pace.

Team work; Access to great experiences and people; humbling to truly stand on the shoulder of Masters. The hiring process is failing, we are clearly not getting the best. Somewhere along the line there is someone not doing their job in filtering out the truly good and the mediocre leet-code caste of sheep; useless to the bone. Competition; odd contracts; uncertainty. There is an uneven pace to it all, but it bodes well with its centric office location. In essence, your job will be varied, and you will need to wear many technical hats; if you cannot learn on the job do not apply to this company.

I have learned an enormous amount about both software engineering and how to be effective in an organization the size of Uber. Uber seems to really be making an effort to do right by its various stakeholders in the wake of several controversies surrounding the company in 2017. Excellent opportunities for career growth. Uber rewards effort and impact with generosity and fairness. The business continues to grow rapidly even though it is already huge.

Over the last 3 months, I've seen and met a lot of engineers, product managers and others who are really smart, engaged and focused on providing the best possible quality (and I mean literally - we've had jams over how a certain animation impacts our users understanding of the product and the business impact). Things like ownership are fairly clear, people move fast and you really feel like you are delivering something valuable. Lack of some developer productivity infrastructure - I've been wanting a virtual machine with a static IP for a while and I can't get it yet. But they are aware, acknowledge the issue and are fixing it.