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 list cloning and k-frequency finder
You are given two separate coding tasks. --- Problem 1: Deep copy a linked list with extra pointers You are given the head of a singly linked list. Ea...
Implement a hierarchical key-value store
Implement a hierarchical key-value store Implement an in-memory hierarchical key-value store where keys are UNIX-like paths joined by '/'. The root no...
Maximize stock profit with constraints
Given an array prices of daily stock prices, you may make at most two complete transactions (buy then sell). After each sell, there is a mandatory one...
Explain Python internals and practices
Answer the following Python deep-dive questions: - Explain the Global Interpreter Lock (GIL) and its impact on CPU-bound vs I/O-bound tasks. - Compare...
Select maximum tasks before deadlines
You are given a set of tasks, each with a positive duration and a deadline (lastDay). You may schedule tasks in any order but only one at a time. Find...
Solve three scheduling and array problems
In this round you are given three separate coding problems to solve. --- Problem 1: Schedule tasks with cooldown You are given: - A list of tasks, whe...
Implement consistent hashing ring
Implement consistent hashing for routing keys to servers. Provide APIs addNode(nodeId, weight), removeNode(nodeId), and getNode(key). Use virtual node...
Solve capital selection and grid escape
Implement two functions for algorithmic practice: 1) MaximizeCapitalAfterProjects(k, initialCapital, requiredCapital, profit): You may pick at most k ...
Find minimum processing rate
You are given an array piles where piles[i] is the number of items in the i-th pile and an integer H (total hours). Find the minimum integer rate R su...
Find shortest unique substring per word
Shortest unique substring for each word You are given an array of distinct strings words. For each word w in words, find a non-empty contiguous substr...
Implement a recent-use eviction cache
Design a fixed-capacity key-value cache that removes the least recently accessed item when it becomes full. Implement a class with the following opera...
Solve word path in grid and trapped water
You are given two independent programming tasks. --- Problem 1: Check if a word exists in a 2D character grid You are given a 2D grid board of charact...
Implement an IPv4 Range Iterator
Implement a class that iterates through IPv4 addresses across multiple inclusive ranges. Each range is given as a pair of IPv4 addresses in dotted-dec...
Maintain median of a data stream
Design a data structure that supports: - addNum(int x): Add an integer from a stream. - findMedian(): Return the median of all inserted numbers so far...
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...
Compute max team size with a core interval
You are given n employees’ working-time intervals, where employee i works during the inclusive interval [startTime[i], endTime[i]]. You want to form a...
Find Shortest Paths in Road Network
You are reviewing code for a road-network graph. The domain objects are: `java class Location { String name; Location(String name) { this.name...
Solve string match and DashMart BFS
Question Implement a string-matching function that returns the first index of a pattern in a text (akin to LeetCode 28 Implement strStr()). 2) “Dash M...
Manage GPU Credits with Expiration
Question Implement a GPU credit manager supporting out-of-order operations: API add_credit(id, amount, timestamp, expiration) // adds ‘amount’ credit...
Solve grid shortest path and robot cleaning
Question LeetCode 1091. Shortest Path in Binary Matrix; LeetCode 489. Robot Room Cleaner https://leetcode.com/problems/shortest-path-in-binary-matrix/...