Opendoor Interview Questions

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

Counting Univalued Subtrees

Question Can you count all the univalued subtrees in a binary tree, as shown in the figure below? The Problem We are given a binary tree. The challenge is to count all the univalued subtrees in the tree. Just to recall, a subtree is any node along with its descendants. The root...

Difficulty: 6/10

Two Stack Queue

Building a Queue with Two Stacks: A Challenge in Engineering Elegance The Objective: Queue with Stacks In this challenge, your task is to implement a queue using two stacks. While many programming languages offer queues through arrays or lists, we're restricting our approach to only utilize ...

Difficulty: 6/10

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

Shortest Path Distance in Matrix

You are given a 2D matrix with several characters contained in its cells. You will also have two distinct characters which are guaranteed to be in the given matrix. Your job will be to find the minimum manhattan distance lessons what is the manhattan distance between the two characters in the mat...

Difficulty: 8/10

Is A Subsequence

Given two strings, one named sub and the other str , determine if sub is a subsequence of str . js const str "barbell" const sub "bell" isASubsequence sub, str true For the sake of the exercise, let's assume that these strings only have lower case characters. W...

Difficulty: 5/10

Delete Nodes From A Linked List

Now that we've implemented a linked list challenges implement a linked list , can you write a method that will delete all nodes of a given value? You're given the following standard structure as the definition of a linked list node: js class LinkedListNode constructor val ...

Difficulty: 4/10

Length of String Compression

Let's define the "compacting" of a string as taking an input like the following: 'sstttrrrr' . We want to take the number of sequential appearances number of times it shows up in a row of each letter: s: 2 t: 3 r: 4 And denote them next to the original character in the string,...

Difficulty: 6/10

Detect Substring in String

How would you write a function to detect a substring in a string? If the substring can be found in the string, return the index at which it starts. Otherwise, return 1 . js function detectSubstring str, subStr return 1 Important do not use the native String clas...

Difficulty: 4/10

Sum of Perfect Squares

A perfect square is a number made by squaring a whole number. Some examples include 1 , 4 , 9 , or 16 , and so on because they are the squared results of 1 , 2 , 3 , 4 , etc. For example: 1 2 1 2 2 4 3 2 9 4 2 16 ... However, 15 is not a perfect square, bec...

Difficulty: 7/10

QA and Testing Interview Questions Cheat Sheet

Introduction: The Underrated Importance of Software Testing Why Testing Matters in Interviews Software Testing is a crucial phase in the development cycle that often doesn't get the attention it deserves, especially when preparing for interviews. However, this area is fertile ground for qu...

Difficulty: 5/10

Brag Sheets for Software Engineers

Introduction A brag sheet is an important tool for software engineers to track achievements and accomplishments throughout the year. With performance review cycles approaching, **a comprehensive brag sheet** enables you to effectively communicate your contributions and skills to management. Th...

Difficulty: 5/10

React Forms and Validation

Introduction to React Forms Forms play a vital role in web development, allowing users to input data and perform actions on a website. In React, forms are created using the form element and various form input elements such as input , select , textarea , etc. Forms in React are special bec...

Difficulty: 5/10

Interview Reports

Opendoor Interview Questions | Glassdoor...

Opendoor interview details: 245 interview questions and 210 interview reviews posted anonymously by Opendoor interview candidates.

opendoor Interview Questions & Answers | Indeed.com...

Prepare yourself for your interview at opendoor by browsing Interview questions and processes from real candidates.

People at Opendoor Say

This information was sourced from reviews originally posted on Glassdoor.

I get to work on a product that I think is actually really great with people I enjoy. The benefits are solid. Company culture is something that is being worked toward in genuine ways rather than typical startup "here's a ping-pong table" band-aids. I feel comfortable speaking up when I see issues and listened to when I do so.

Hard work is rewarded. I got several raises, bonuses, and promotions in my first two years at Opendoor. I just received a $7000 bonus for working hard during COVID-19.

Interesting domain. Lots of interesting challenges. They're just disrupting the tip of the iceberg. Financial potential is huge.

Strong leadership team, customer-focused, ambitious. SF office is very nice and in good location. High quality people, healthy corporate culture, performance oriented.