Software Engineer Coding & Algorithms Interview Questions
Practice 2,743 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."
Print a binary tree as aligned text
Implement a function that prints (or returns) an ASCII layout of a binary tree. Requirements: - Each node has a string value (assume it contains no sp...
Design set with O(1) random access
Design a data structure ("FancySet") that stores unique integers and supports the following operations, each in average O(1) time: - add(x): Insert va...
Implement multiple coding round problems
This multi-part question evaluates algorithmic problem-solving skills including efficient lookup/search, stable ordering and priority management, stre...
Check if each recipe is a contiguous subsequence
This question evaluates proficiency in algorithmic sequence matching and contiguous subarray detection, encompassing array/string pattern matching and...
Maximize revenue by choosing one query type
This question evaluates optimization and numerical reasoning skills, specifically selecting a single repetitive action to maximize aggregate revenue u...
Implement Prefix Search and Node Removal
This interview included two coding tasks: 1. Implement a prefix-search data structure for strings with two operations: insert(word) and count_with_pre...
Find smallest start index avoiding left exit
You are given an integer array jump of length n (0-indexed). If you are currently at index i, your next position becomes i + jump[i] (a positive value...
Maximize 1D deliveries within distance and minimize total distance
This question evaluates combinatorial optimization and constrained matching skills, focusing on reasoning about distance-based pairings, lexicographic...
Maximize non-adjacent sum on an N-ary tree
You are given an N-ary tree (each node may have 0..k children). Each node contains an integer value (can be 0 or positive). You want to select a set o...
Compute graph distance and impacted services
This question evaluates proficiency in graph algorithms and traversal (shortest-path/BFS and cycle handling), file-path/tree modeling, dependency grap...
Find cheapest flight with at most K stops
Problem You are given a directed weighted graph representing flights between cities. Inputs - An integer n: number of cities, labeled 0..n-1. - A list...
Implement cloud storage with quotas and compression
Problem Implement an in-memory cloud storage service that supports multiple users, per-user storage quotas, changing quotas with eviction, and file co...
Implement a multi-rover Mars controller
Problem Build a small command-line “Mars Rover Controller” program. Single rover (v1) A rover starts at coordinate (0, 0) on an infinite 2D grid and i...
Can the character reach the destination?
You control a character starting at a start cell and want to reach a target cell in a 2D grid. Some cells are blocked by obstacles and cannot be enter...
Implement timestamped task management system APIs
You are implementing an in-memory Task Management System. All API methods are called with a timestamp representing the logical time when the operation...
Implement User Sessionization From Event Stream
You are building a backend data-processing component that consumes a stream of newline-delimited JSON events. Each event represents a user sending a m...
Compute courier pay and implement load balancing
Problem 1: Compute courier (delivery driver) pay You are given a sequence of delivery-related events for a courier during a day. Your task is to compu...
Answer four string/array/battery coding questions
You are given four independent coding questions. Problem A — Uppercase vs lowercase count difference Given a string s (ASCII), count how many characte...
Implement binary encode/decode with frequency tree
Problem Implement a binary encoding and decoding scheme for strings based on character frequencies (Huffman-like coding). You must implement two funct...
Implement an LRU cache
Problem: LRU Cache Design and implement a data structure that supports an LRU (Least Recently Used) cache with a fixed capacity. Requirements Implemen...