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."
Implement polynomial multiplication API in C
Problem Implement an API in C to multiply two polynomials. A polynomial is represented by its coefficients. You must define the input and output forma...
Merge two sorted arrays in-place
Given two arrays arr1 and arr2, both sorted in ascending order. - Modify arr1 in-place to contain all elements from arr1 and arr2 in ascending order. ...
Generate Per-Position Guess Feedback
You are building a word-guessing feedback function. Given two strings, target and guess, of the same length, return an integer array feedback where ea...
Process multi-currency payments with fees
You are building a small payment processor for a multi-currency wallet. Inputs 1. Wallet balances: a map balances[currency] -> integer representing th...
Solve Shortest Paths and Rental Allocation
You are given two independent coding problems. Problem 1: Shortest path in a weighted graph You are given a weighted graph where each edge has a non-n...
Find viewing direction that sees most points
You are standing at the origin on a 2D plane. You are given a list of points points[i] = (xi, yi) (not necessarily distinct), and a viewing angle thet...
Implement paginated retrieval of transactions
Given a large list of transaction records (id, userId, amount, createdAt), implement APIs to return transactions in reverse chronological order with p...
Implement stateful connection router simulator
You are implementing a simplified connection router / load balancer for a Jupyter-like multi-tenant server system. There are N target servers, indexed...
Implement an LRU cache
Design and implement a data structure for a Least Recently Used (LRU) cache with a fixed capacity. The cache must support: - get(key): return the valu...
Implement Wordle-style word guessing solver
Implement a program to solve a Wordle-style word guessing game. The game has a hidden target word of fixed length L (e.g., 5) drawn from a known dicti...
Minimize maximum height along a grid path
You are given an m x n grid heights of distinct integers representing terrain heights. You start at the top-left cell (0,0) and want to reach the bott...
Compute minimal transfers to settle group expenses
Problem A group of friends go on a trip and share expenses. Each expense is recorded as an object: - payer (string): who paid the full amount - amount...
Compute minimum time with task cooldowns
You are given a multiset of task types represented by uppercase letters (e.g., A, A, A, B, B, C). Each task takes exactly 1 time unit to execute. Runn...
Implement follow graph with snapshots
Problem You are building an in-memory social network relationship store that supports time-travel queries. Users are identified by integers. A directe...
Validate whether a given sequence is a Hamiltonian path
You are given strArr, an array of three strings describing an undirected graph and a proposed vertex visit order: 1. strArr[0]: a comma-separated list...
Find Earliest Full Connectivity Timestamp
You are given: - A list of all user IDs in a ride-sharing system. - A chronological text log of ride-sharing events. Each relevant event contains a ti...
Determine whether points form squares
Problem: Square detection and counting from point coordinates You are given points on a 2D plane with integer coordinates. Part A — Validate a single ...
Solve Three Algorithm Variants
You are given three independent coding problems. For each one, describe and implement an efficient solution. 1. Generate queue arrangements - You a...
Reverse nodes in even-length linked-list groups
Problem Given the head of a singly linked list, you will traverse the list in contiguous groups of increasing size: the 1st group has size 1, the 2nd ...
Count connected components in a binary grid
You are given an m x n grid of characters '0' and '1': - '1' represents land - '0' represents water Two land cells are connected if they share an edge...