Reddit Interview Questions

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

Next Greater Element in a Circular Array

A circular array challenges next larger in a circular array is one where the next element of the last element is the first element. You know how standard arrays look. Instead of 1, 2, 3, 4 , imagine the following, where after index 7 , we'd move back to index 0 . Can you write ...

Difficulty: 6/10

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

Validate Palindrome

Given a string str , can you write a method that will return True if is a palindrome and False if it is not? If you'll recall, a palindrome is defined as "a word, phrase, or sequence that reads the same backward as forward". For now, assume that we will not have input strings that contain spec...

Difficulty: 3/10

How Deep Does It Go? Maximum Depth of Binary tree

Write a method to determine how deep a binary tree lessons an intro to binary trees and search trees goes. The tree's depth can be described as the number of nodes you encounter as you traverse from the root node to a leaf . The root node is the topmost node, and a leaf is a node wi...

Difficulty: 6/10

Serialize and Deserialize a Binary Tree

Given a binary tree representation, can you come up with a method to serialize the tree and then deserialize it to get the exact same tree? What is Serialization and Deserialization? Serialization is a process that converts a data structure to a suitable format that can be stored either ...

Difficulty: 8/10

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

Detect An Undirected Graph Cycle

Can you detect a cycle in an undirected graph? Recall that an undirected graph lessons simple reference to graphs is one where the edges are bidirectional. A cycle is one where there is a closed path, that is, the first and last graph lessons simple reference to graphs vertices can be the...

Difficulty: 9/10

Hoisting and Call Stack

Understanding Variable Scoping in JavaScript Let's dig into a fascinating JavaScript example to unravel the mystery of variable scoping. The Code Snippet Here's the code we'll be examining: javascript var numOfBeers 5 function getMoreBeers console.log 'I have this many beers: ...

Difficulty: 7/10

Working with REST APIs

As a senior engineer interested in Math, coding, algorithmic trading, and analytics with a background in algo trading in C and R programming in statistics, you may already be familiar with various computational concepts and data manipulation techniques. In this lesson, we will explore the fundame...

Difficulty: 5/10

Introduction to Addition and Subtraction

Still generating... This lesson is currently still being generated, please wait... thanks! **Please refresh in a minute or two to see updates.** ...

Difficulty: 5/10

Application Mastery

**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

Longest Common Subsequence

Difficulty: 5/10

Interview Reports

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What's it like working for reddit? : cscareerquestions...

116 votes, 31 comments. I'm applying to reddit for a internship in the summer. I was wondering if anyone who has worked there before as a software …

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See what employees say it's like to work at Reddit. Salaries, reviews, and more - all posted by employees working at Reddit.

People at Reddit Say

This information was sourced from reviews originally posted on Glassdoor.

You get to have real and meaningful impact on one of the largest platforms in the world. Feels completely unlike other FAANG companies where you’re practically a cog. You can truly make huge change here.

This is a growing company with competitive pay, a good CEO, and lots of challenging scale problems.

If you're of the manipulative management type, it's the sort of environment where you can get by with zero consequences. If you're incompetent it's the ideal place to relax. You should be able to bully others to keep your job, so feel free to join if that's your thing. Those are the nice things I have to say about the company.

Great perks. In addition to insurance + 401k, there's also a lot of budget to spend for wellness, education, dependents, pets, parking, dinners, transit, etc. It's an extensive list.