Snapchat Software Engineer Coding & Algorithms Interview Questions
Practice 39 real Coding & Algorithms interview questions for Software Engineer roles at Snapchat.
"I got asked a hardcore MCM DP question and I saw it on PracHub as well. Solved that question in 5 minutes. Without PracHub I doubt I could solve it in 5 hours. Though somehow didn't get hired, perhaps I guess I solved it too fast? /s"
"Believe me i'm a student here jn US. Recently interviewed for MSFT. They asked me exact question from PracHub. I saw it the night before and ignored it cause why waste time on random sites. I legit wanna go back and redo this whole thing if I had chance. Not saying will work for everyone but there is certainly some merit to that website. And i'm gonna use it in future prep from now on like lc tagged"
"10 years of experience but never worked at a top company. PracHub's senior-level questions helped me break into FAANG at 35. Age is just a number."
"I was skeptical about the 'real questions' claim, so I put it to the test. I searched for the exact question I got grilled on at my last Meta onsite... and it was right there. Word for word."
"Got a Google recruiter call on Monday, interview on Friday. Crammed PracHub for 4 days. Passed every round. This platform is a miracle worker."
"I've used LC, Glassdoor, and random Discords. Nothing comes close to the accuracy here. The questions are actually current — that's what got me. Felt like I had a cheat sheet during the interview."
"The solution quality is insane. It covers approach, edge cases, time complexity, follow-ups. Nothing else comes close."
"Legit the only resource you need. TC went from 180k -> 350k. Just memorize the top 50 for your target company and you're golden."
"PracHub Premium for one month cost me the price of two coffees a week. It landed me a $280K+ starting offer."
"Literally just signed a $600k offer. I only had 2 weeks to prep, so I focused entirely on the company-tagged lists here. If you're targeting L5+, don't overthink it."
"Coaches and bootcamp prep courses cost around $200-300 but PracHub Premium is actually less than a Netflix subscription. And it landed me a $178K offer."
"I honestly don't know how you guys gather so many real interview questions. It's almost scary. I walked into my Amazon loop and recognized 3 out of 4 problems from your database."
"Discovered PracHub 10 days before my interview. By day 5, I stopped being nervous. By interview day, I was actually excited to show what I knew."
"I recently cleared Uber interviews (strong hire in the design round) and all the questions were present in prachub."
"The search is what sold me. I typed in a really niche DP problem I got asked last year and it actually came up, full breakdown and everything. These guys are clearly updating it constantly."
Find index of first unique character
Find index of first unique character Given a string s, return the index of the first character that appears exactly once; if none exists, return -1. A...
Solve Three Algorithmic Tasks
You were asked three coding problems: 1. Count events inside a time window - You are given an initial collection of event timestamps in HH:MM:SS fo...
Implement a Timestamped Counter
This question evaluates the ability to design and implement time-indexed counting data structures, reason about strictly increasing timestamps and que...
Check if a binary tree is complete
This question evaluates understanding of binary tree properties and traversal techniques, testing competency in data structures and algorithmic reason...
Implement a thread-safe rate limiter
Design and implement a per-user API rate limiter. Requirements: - Method: boolean allow(String userId, long nowMillis) returns whether the request is ...
Compute minimum escape time in a grid
You are given a 2D floor plan grid. Each cell is one of: - . empty space (walkable) - # wall/blocked (not walkable) - P a person - E an exit A person ...
Determine Whether a Word Transformation Exists
Given a beginWord, an endWord, and a list of valid words wordList, determine whether it is possible to transform beginWord into endWord. Rules: - Each...
Compute shortest path in a 2D grid
Given an m x n grid where: - 0 represents an empty cell you can move through - 1 represents a blocked cell you cannot enter - movement is allowed in 4...
Implement a dictionary without built-in Dictionary
This question evaluates understanding of hash tables and low-level data-structure implementation, including hashing, collision resolution, resizing/re...
Compute longest increasing path in matrix
You are given an m x n grid (matrix) of integers grid, where m >= 1 and n >= 1. A path in the matrix is a sequence of cells where: - You may move from...
Count ways to decode digit string
You are given a string s consisting of digits '0' to '9'. The string encodes a message using the following mapping: - '1' → A, '2' → B, ..., '26' → Z....
Implement sin(x) with precision constraints
Coding Question: Implement sin(x) Implement a function that returns an approximation of the trigonometric sine function. Function signature - Input: a...
Design Manhattan-distance meeting point finder
Given an m×n grid with cells marked 1 for homes and 0 otherwise, choose a single meeting cell that minimizes the sum of Manhattan distances from all h...
Compute islands in a binary grid
You are given an m-by-n grid of characters where '1' represents land and '0' represents water. Count the number of connected land masses (islands) usi...
Implement binary search for boundary index
Given a sorted integer array nums (length n) and an integer target t, return the index of the first element in nums that is greater than or equal to t...
Count islands with eight-direction adjacency
You are given an m×n grid of characters '1' (land) and '0' (water). Count the number of islands, where cells are connected if they touch in any of the...
Solve Open the Lock BFS
Question LeetCode 752. Open the Lock – Given an initial lock state "0000", a target combination, and a list of deadend combinations that cannot be use...
Determine blockage and parse HTML tokens
Question Given a set of 2-D circular stones, determine whether they can completely block the width of a river. You may define the input format. Given ...
Handle cards, islands, Trie, median
Question LeetCode 914. X of a Kind in a Deck of Cards LeetCode 694. Number of Distinct Islands LeetCode 208. Implement Trie (Prefix Tree) LeetCode 295...