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."
Solve word segmentation and React palindrome validation
Part A — String segmentation: Given a non-empty string s and a dictionary of valid words, design an algorithm to determine whether s can be segmented ...
Implement a Timestamped Banking System
Implement an in-memory banking system that processes API calls in nondecreasing timestamp order. Support the following operations: - create_account(ti...
Count integer pairs satisfying 1/x + 1/y = 1/N
You are given a positive integer N (\(1 \le N \le 10^6\)). Consider the Diophantine equation: \[ \frac{1}{x} + \frac{1}{y} = \frac{1}{N}, \] where x a...
Check feasibility of AI course schedule
You are designing a learning path for n AI-related courses, labeled from 0 to n - 1. Some courses have prerequisites. For example, to take course b, y...
Determine feasibility and clean parentheses string
You are given two independent coding tasks. 1) Check if all courses/tasks can be completed You have n courses labeled 0..n-1 and a list of prerequisit...
Implement bitmap font render/compress/invert
Bitmap Character to Image Conversion (3 phases) You are given a bitmap lookup table (a dictionary/map) that represents a tiny “font”. - Key: a charact...
Solve listed algorithm problems
The interview note referenced several independent coding problems. Solve each one independently. 1. Median of two sorted arrays You are given two...
Compute total revenue from greedy VM rentals
You manage n VM types. VM type i starts with inventory a[i] (number of available instances). There are m customers arriving one by one. For each custo...
Detect cycles and break them in pod dependencies
You are given dependencies between software pods. Each dependency is a directed edge u -> v meaning pod u must be built/installed before pod v. Part 1...
Design Tic-Tac-Toe With K Players
Design and implement a Tic-Tac-Toe game engine. You are given: - k players, each with a unique player ID or mark. - An n x n board, initially empty. -...
Zero out duplicates and sort an array
Coding question You are given an integer array arr of length about 75. - The data is not sorted. - The array may contain duplicate values. - You must ...
Identify read-only files from permission records
You are given a list of file metadata records. Each record contains: - owner (string): the username who owns the file - permission (string): a Unix-li...
Validate course catalog dependencies
Design a function to validate an e-learning course catalog. You are given: ( 1) a set of course IDs, and ( 2) a list of prerequisite pairs (u, v) mean...
Trace code and find frequent character
Trace code and find frequent character 1) Trace a simple algorithm: Given a short loop-and-conditional pseudo-code operating over an integer array, tr...
Solve string partition and equal-sum package problems
Solve string partition and equal-sum package problems 1) Given a string itemCategories (lowercase English letters) and an integer k (0 ≤ k ≤ 26), coun...
Parse a password from a matrix
Given an m x n matrix of characters, a starting coordinate (row, col), and a string of moves consisting of 'U', 'D', 'L', 'R', parse a password by vis...
Find user who can access every camera
You are given permissions data describing which users and groups have ownership access to which cameras, and which entities are members of which group...
Validate parent array forms a tree
Problem You are given an integer array parent of length n describing a directed parent pointer for each node i (nodes are labeled 0..n-1). - parent[i]...
Extend a BFS maze solver stepwise
Maze Solver (4 incremental tasks) You are given an existing codebase for a maze solver that finds a path in a 2D grid. The maze is represented as a re...
Implement a single-thread task scheduler API
Design and implement a simple task scheduler for a single CPU, single thread environment. You need to support scheduling callbacks (tasks) using the f...