Snap Interview Questions

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

String Breakdown

We're given a string and need to see if it can be broken down into words from a dictionary array. For example: js const str "applecomputer" const dictArr "apple", "computer" stringBreakdown str, dictArr true Assuming that there are no repeats in the dictionary array, ca...

Difficulty: 7/10

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

Binary Tree Inorder Traversal

Can you write a function to traverse a binary tree **in order**, and print out the value of each node as it passes? 4 5 6 The example would output 4, 6, 5 since there is no left child for 4 , and 6 is visited in order before 5 . The definition of a tree node i...

Difficulty: 3/10

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

Remove Duplicates From Array

Given an array, return another array with just the ordered unique elements from the given array. In other words, you're removing any duplicates. Note: Order needs to be preserved, so no sorting should be done. And the order should be maintained with the first occurrence of the element in the given...

Difficulty: 4/10

Decimal To Binary

Today, we're going to do some math! There is only one prerequisite for answering this question, and it is knowing the definitions of binary and decimal . According to How to Convert Decimal to Binary and Binary to Decimal https: techterms.com definition binary , binary is a numeric system th...

Difficulty: 5/10

Find Missing Number in Array

We're given an array of continuous numbers that should increment sequentially by 1 , which just means that we expect a sequence like: 1, 2, 3, 4, 5, 6, 7 However, we notice that there are some missing numbers in the sequence. 1, 2, 4, 5, 7 Can you write a method missingNumb...

Difficulty: 4/10

Lamps and Houses

On a given street, there's a bunch of houses and lamps nearby. It looks kind of like the following H being houses, L being lamps : L H L H H 0 1 2 3 4 We decide to represent this with two arrays: one being the positions of the houses, and the other the positions of the lamps. From the ...

Difficulty: 8/10

Implement a Binary Search Tree

Let's implement a Binary Search Tree ! Recall that a binary search tree , or a BST , is a binary tree lessons an intro to binary trees and search trees that is ordered via these two properties: 1. The left sub tree of a node has a value less than or equal to its parent node's value. 2. The ...

Difficulty: 6/10

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

Systems Design for Netflix

Systems Design of Netflix Introduction Netflix. It s more than just a streaming service it s a cultural phenomenon. But have you ever paused pun intended to think about the colossal tech machinery running behind those binge watching sessions? From starting as a DVD by mail service to be...

Difficulty: 5/10

Risk Management in C++

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Difficulty: 5/10

People at Snap Say

This information was sourced from reviews originally posted on Glassdoor.

You work in the product . You can have direct impact (and can get you fired too). Many new things to be done. Become a professional company or sell it. Stop hiring friends for management positions and hire technical people who knows what we are doing.

In the past few months, I'm seeing very positive changes in the company's engineering culture. We are becoming more transparent, building a data-driven decision-making culture and are also starting to value more on code quality. Similar to what some Wall St. analysts are saying, I think we are learning to become a more mature company.

Lottery ticket, may not be your favorite job but it could be your last job! You may create the seed of an idea that will take root in many other companies, even your competitors. Managers are also writing code, so it's my way or the highway no discussion. You can do either one of these roles well, or you can do both poorly. Two same named guys can't figure it out. Senior management is quite inexperienced, so political bad actors rule the roost. Be sure you speak to a real engineer before interviewing and get their take so that you know what's real and what's not.

You will hone your knife sharpening skills. You will increase your backstab multiplier, if you don’t get fired. You can make your own path to success on the broken backs of your coworkers. Surrounded with low quality engineering culture. Secrecy, secrey, secrecy. No career development whatsoever. Poor decisions all around. Very toxic, mean, exclusionary culture. It's accepted and worse, expected and rewarded.