Software Engineer Coding & Algorithms Interview Questions
Practice 2,306 real Coding & Algorithms interview questions for Software Engineer roles. From companies including Meta, Amazon, Google, Uber, Microsoft.
"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."
Validate whether a binary string is good
You are given a binary string s consisting only of characters '0' and '1'. Define a good string recursively by the grammar: - '0' is a good string. - ...
Implement account scheduler with locking and LRU
Design a class AccountScheduler that manages the time-based availability of a fixed set of account IDs. Initialization You are given: - accounts: a li...
Solve Two Array Optimization Problems
You are given two coding problems from the same interview round. Problem 1: Split a gold chain fairly An array weights represents the weights of conse...
Solve a Key-Door Corridor Maze
AI-assisted coding round. You may use an AI coding assistant, but you are responsible for debugging the implementation and validating the test cases. ...
Implement Interval Overrides and Top-K Strings
Solve both coding problems below. Problem A: Apply Override Intervals You are given a set of time intervals representing normal usage periods. Each us...
Merge Message Context Windows
You are given a chat history in which each message has a unique integer id and a string content. Message IDs are strictly increasing, and the full his...
Count same-color squares in a character grid
You are given a 2D grid (matrix) of characters. Each character represents a color: cells with the same character are considered the same color. Formal...
Compute longest common subsequence length
Problem You are given two strings s and t. A subsequence of a string is obtained by deleting zero or more characters without changing the order of the...
Format Words into Fixed-Width Lines
Given an array of words and an integer maxWidth, arrange the words into lines so that each line has exactly maxWidth characters. Rules: 1. Put words i...
Solve Wonderful Strings and Grid Queries
Two algorithmic tasks were reported. Task 1: Minimum-cost wonderful string A string is considered wonderful if, among the letters 'a' through 'j', at ...
Find longest common ordered restaurant list
You have two delivery drivers who each have a pickup plan represented as a list of restaurant IDs (strings). Because there is only one car, the combin...
Implement chance of a personal best
You are given a simplified model for tracking race times on an obstacle course. - A course has a fixed number of obstacles. - A run records the time s...
Design Composable Event Recommendations
Build a flexible event recommendation engine for a ticket marketplace. You are given these domain objects and services: - Event(id, name, city, date) ...
Solve tree and DP problems
This coding round contained two algorithm questions: 1. Deepest shared ancestor in a binary tree You are given the root of a binary tree and two ...
Infer an Unknown Alphabet Order
You are given a list of words that is already sorted according to an unknown alphabet. Derive one valid ordering of the characters in that alphabet. R...
Solve two interview coding problems
The interview included two coding problems. Problem 1: Find valid robot locations in a grid You are given a 2D grid containing empty cells and obstacl...
Solve friend recommendations and time-versioned maps
Solve the following two coding problems. Problem 1: Friend recommendation from weighted likes You are given a directed weighted graph of users. Each r...
Solve Refueling and JSON Parsing Tasks
Solve the following two independent coding tasks. Task 1: Minimize refueling stops You are driving from position 0 to a destination at distance target...
Solve four algorithmic problems
Answer the following independent algorithmic questions: 1) Count extendable prefixes for '10' subsequences: Given a binary string s and an integer k, ...
Maximize minimum after K decrements
You are given an integer array A of length N and an integer K. You must perform exactly K operations. In each operation, choose any index i and do A[i...