Intercom Interview Questions

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

Invert a Binary Tree

Can you invert a binary tree over its vertical axis? This is a famous problem made popular by this tweet: Google: 90 of our engineers use the software you wrote Homebrew , but you can t invert a binary tree on a whiteboard so f**k off. mdash Max Howell mxcl June 10, 2015 Given a binary t...

Difficulty: 7/10

Traverse a Matrix in Spiral Order

Given an m * n matrix array, can you print all its elements in a spiral order as shown in the figure below? Try to use only O 1 space! Constraints Total elements in the matrix 100000 The values in the matrix ranges from 1000000000 and 1000000000 Expected time complexity :...

Difficulty: 7/10

Levenshtein Edit Distance

An edit distance is a way to quantify how different two strings are. This is calculated using **the minimum number of transformations to turn one string to another**. The transformations include insertion , deletion , and substitution . So when comparing two identical strings, say cat and ca...

Difficulty: 7/10

Is This Graph a Tree

Given an undirected graph, can you see if it's a tree? If so, return true and false otherwise. An undirected graph lessons simple reference to graphs is a tree based _on the following conditions_: first, there cannot be a cycle. Second, the graph lessons simple reference to graph...

Difficulty: 7/10

Longest Substring With No Duplicate Characters

Given a string of characters, can you find the longest substring of the string that has no repeating characters? An example is shown below: js lengthOfLongestSubstring "abracadabar" 4 because it is 'brac' Constraints Length of the string 100000 The string ...

Difficulty: 5/10

Two Sum

This is a classic and very common interview problem. Given an array of integers, return the indices of the two numbers in it that add up to a specific "goal" number. Suppose we had an array 1, 3, 6, 7, 9 , and let's say our "goal" number was 10 . Our numbers to sum to it could be 3 and 7 , an...

Difficulty: 4/10

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

Flood Fill Paintbucket

Imagine the implementation for the paintbucket feature in Microsoft Paint, or how certain image filters work. You click on a specific pixel on a screen, and every similar colored neighboring pixel would change to your selected color. Let's implement a simpler version of that feature. You're gi...

Difficulty: 7/10

The Coin Change Problem

If I give you coins of denominations 3, 7, 9 a coin worth 3 cents, a coin worth 7 cents, etc. , can you tell me the minimum number of coins that are needed to make a total of 37 ? You can assume that an infinite supply of all these coins are available to you. This challenge is about so...

Difficulty: 8/10

Javascript Frameworks Comparison

Front end Javascript lessons typescript vs javascript in 2021 frameworks are essential for modern applications development. This is especially true today since they can significantly improve the software development experience in terms of architecture, functionality, scalability, deployment, an...

Difficulty: 5/10

JavaScript Basics

Introduction to JavaScript JavaScript is a versatile programming language that plays a critical role in frontend web development. It allows you to create interactive and dynamic elements on web pages, making them more engaging for users. JavaScript is often combined with HTML and CSS to build m...

Difficulty: 5/10

Data Structures and Algorithms with JavaScript

**Unlock Your Full Potential with AlgoDaily!** We hope you're enjoying this course. At AlgoDaily, our aim is to transform complex coding challenges into engaging, bite sized lessons. And while our free lessons give you a glimpse of this transformative experience, there's so much more in store. ...

Difficulty: 5/10

Interview Reports

Engineering interviews are incredibly expensive, for both parties. Here's what we've learned from years of screening and evaluating candidates at Intercom.

How we interview and hire engineers - Inside Intercom...

Brian White

Engineering interviews are incredibly expensive, for both parties. Here's what we've learned from years of screening and evaluating candidates at Intercom.

Intercom's Interview Process and My Experience | Ketan Bhatt...

I interviewed at Intercom, Dublin, for a “Product Engineer” role in June - August, 2019. I will be starting my Intercom journey on December 2nd, 2019 :D While preparing, I got a lot of help from Glass...

Guide: How to Get a Job at Intercom - Pathrise...

A guide to getting a job at Intercom including interview questions, interview process, salaries, office locations, photos, tips on getting a foot in the door, and more. Save yourself hours of preperat...

People at Intercom Say

This information was sourced from reviews originally posted on Glassdoor.

Intercom is an amazing place to work, the people, the product, and training are some of the best I have ever seen in my career

Intercom is kind, inclusive, authentic, and honest. It is a company where our Exec and Directors work to know you as an individual, understand your challenges, listen to your feedback and invest in your development. I've been here 2. 5 years and can honestly say I feel like I can be myself here and that the company cares about my career. There is a lot of fruitful collaboration between teams, that was strengthened this year even against COVID. And the benefits are both generous and realistic for what the population needs - they are always looking to add more and not stringent.

I loved my experience at Intercom! I was surrounded by intelligent, passionate, hard-working people.

The company genuinely cares about employees, work life balance and their well being. Awesome people to work with across the company. Competitive compensation, great benefits, and equity. Transparency from leadership and a badass CEO in Karen.