Mailchimp Interview Questions

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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

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

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

Find Duplicate Words

A very common interview challenge is to determine how often words appear in a given string or set of strings. Here's a version of this: return a list of duplicate words in a sentence. For example, given 'The dog is the best' , returns "the" . Likewise, given 'Happy thanksgiving, I am s...

Difficulty: 4/10

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

Find in Shifted Sorted Matrix

Understanding the Matrix Shift Problem Suppose you have a matrix where each row and column is sorted in ascending order. Your task is to apply two specific types of shifts, described below, and locate a given element x in the transformed matrix. Shift Types **Left Circular Shift l :** ...

Difficulty: 8/10

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

Sum All Primes

You're given a number n . Can you write a method sumOfAllPrimes that finds all prime numbers smaller than or equal to n , and returns a sum of them? For example, we're given the number 15 . All prime numbers smaller than 15 are: 2, 3, 5, 7, 11, 13 They sum up to 41 , so sumOfA...

Difficulty: 4/10

Add Linked List Numbers

We're provided the following two linked lists: 1 2 3 4 and 2 5 8 Each one represents a number in reversed order, so 1 2 3 4 represents 4321 and 2 5 8 represents 852 *note: for an extra challenge, consider if they weren't reversed* . The lists are guarante...

Difficulty: 7/10

Third Party Integration

Third party integration, in the context of application development, refers to the process of incorporating functionality or services from external providers into your application. These external providers are commonly referred to as third parties. Third party integrations are important in applicat...

Difficulty: 5/10

Advanced Data Structures

**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

Linked Lists

In a linked list, each element is called a **node**. Each node consists of two parts: the **data** and a **reference** also called a **pointer** to the **next node**. Here's an example of a simple linked list implemented using C : cpp include using namespace std int main Linked...

Difficulty: 5/10

Interview Reports

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People at Mailchimp Say

This information was sourced from reviews originally posted on Glassdoor.

MC has amazing benefits - incredible 401k match and profit sharing, great healthcare and generous PTO. After interviewing at a few other companies, nothing else comes close in terms of benefits!

Day-to-day there are great opportunities for feature work, and training benefits as well. Work-life balance is accounted for, and everyone in the company is there to help you succeed. (There are many internal roles available if you would like to explore different areas of engineering too)

Smart coworkers, super cool office, location of said “cool office”, autonomy, minimal red tape, diversity, learning opportunities, 100% covered health, dental and vision for my entire family, being an engineer at a tech company, free snacks, everyone has a desk that raises and lowers so that you can either sit or stand, flexible working hours, work from home a couple days out of the week. I honestly love it here and I scratch my head when reading some of the bad reviews here.

I've been with the company for about 6 months and each day I am more thankful to be here. They are extremely generous with benefits (both written and non) and I am excited about coming to work every day.