Interview Questions
Practice the exact questions companies are asking right now.
Questions
10.0k
Companies
520
Updated
08.21.2026
10.0k Questions 520 Companies08.21.2026
PLTCHK
"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"
_The_TaNk_
"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"
ChrisSenior SWE, LinkedIn
"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."
sleepy33
"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."
JakeSenior ML Engineer, Lyft
"Got a Google recruiter call on Monday, interview on Friday. Crammed PracHub for 4 days. Passed every round. This platform is a miracle worker."
nuggetlord
"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."
CarlosFull Stack, Shopify
"The solution quality is insane. It covers approach, edge cases, time complexity, follow-ups. Nothing else comes close."
boba.tea.vibes
"Legit the only resource you need. TC went from 180k -> 350k. Just memorize the top 50 for your target company and you're golden."
AndySWE-II, Google
"PracHub Premium for one month cost me the price of two coffees a week. It landed me a $280K+ starting offer."
couchpotato99
"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."
ShrutiData Engineer, Salesforce
"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."
midnightramen
"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."
BiancaFrontend Eng, Figma
"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."
tambrahm007
"I recently cleared Uber interviews (strong hire in the design round) and all the questions were present in prachub."
toa
"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."
Showing 20 results
Role
Medium
Data ScientistWhich clustering algorithm would you use and why
Question You need to cluster users for a social product (e.g. Meta) to discover meaningful groups such as communities, interest groups, or usage segme...
Machine Learning
4
0
61 people solved
Nov 2, 2025
Medium
Software EngineerFind balanced subarray and increasing tree path
You are given two coding problems. Problem 1: Longest balanced subarray (0/1) Given an integer array nums of length n where each element is either 0 o...
Coding & Algorithms
6
0
66 people solved
Nov 2, 2025
Medium
Software EngineerDesign an object-oriented parking lot system
Design an object-oriented model for a parking lot management system. Requirements: - The parking lot has multiple levels; each level has multiple park...
Software Engineering Fundamentals
26
0
188 people solved
Nov 2, 2025
Medium
Software Engineer LockedExpand Nested Repetition Expressions
This question evaluates understanding of string parsing and nested structure handling, including skills in recursion, stack-based parsing, tokenizatio...
Coding & Algorithms
1
0
24 people solved
May 8, 2026
Hard
Software EngineerDesign a response-ranking ML system
Design a response-ranking ML system System Design: Ranking Candidate Text Responses to Maximize User Satisfaction You are designing an end-to-end mach...
ML System Design
9
0
94 people solved
Jul 28, 2025
Medium
Data ScientistUpdate Box Probabilities After Drawing Red Balls
Three boxes are equally likely to be selected: - Box A contains two red balls. - Box B contains one red and one blue ball. - Box C contains two blue b...
Statistics & Math
0
0
11 people solved
Jan 5, 2025
Medium
Software Engineer LockedFind First Prefix-Matching Word
This question evaluates proficiency in string processing and prefix-matching within arrays, testing the ability to identify the first occurrence and h...
Coding & Algorithms
9
0
76 people solved
Feb 24, 2026
Hard
Software EngineerDesign a bank system with scheduling and rankings
Design a bank system with scheduling and rankings Design an In‑Memory Bank System (Technical Screen) You are designing an in‑memory bank ledger that s...
System Design
6
0
102 people solved
Jul 27, 2025
Medium
Software EngineerImplement an expiring GPU credits ledger
Implement an expiring GPU credits ledger for multiple users with three operations: 1) add_credit(user_id, amount, expiry_time): add a lot of credits t...
Coding & Algorithms
52
0
428 people solved
Jul 27, 2025
Medium
Software EngineerDesign a Balloon Festival Simulator
Implement a class BalloonFestival with the following API and rules. Goal Track hot air balloons (yours and competitors), evolving wind fields, and bal...
Coding & Algorithms
33
0
381 people solved
Jul 27, 2025
Medium
Machine Learning EngineerSenior+ LockedExplain LLM training, RL, and evaluation
This question evaluates understanding of the full large language model lifecycle and associated competencies, including pre-training, supervised fine-...
Machine Learning
7
0
101 people solved
Dec 25, 2025
Medium
Software EngineerCompute 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...
Coding & Algorithms
14
0
188 people solved
Dec 25, 2025
Medium
Software EngineerImplement deposit, withdraw, and transfer in a class
Problem Implement a class AccountService that supports basic money operations on accounts. Operations - deposit(accountId, amount) - withdraw(accountI...
Coding & Algorithms
11
0
107 people solved
Dec 25, 2025
Medium
Software EngineerDesign Slack-like messaging platform
Design a Slack-like team collaboration product. Core features: - Workspaces (tenants), users, and channels (public/private) - Direct messages (1:1 and...
System Design
12
0
99 people solved
Oct 31, 2025
Medium
Software EngineerSolve two set and graph problems
Implement solutions for the following two data-structure / algorithm problems. --- Problem 1: Friend-purchase recommendations You are given three enti...
Coding & Algorithms
18
0
167 people solved
Oct 31, 2025
Easy
Data ScientistFermi Estimation with Confidence Intervals: How Many Houses Does One Year of US Netflix Spending Buy?
Estimate how many houses could be purchased with the total amount that people in the United States spend on Netflix subscriptions in one year. You sta...
Machine Learning
2
0
35 people solved
Jul 26, 2025
Medium
Software EngineerExplain algorithm strategies and complexity
Explain algorithm strategies and complexity You are faced with a complex, potentially ambiguous coding problem. Describe how you would clarify require...
Coding & Algorithms
7
0
98 people solved
Jul 26, 2025
Medium
Software EngineerGenerate constrained NFT metadata
Generate constrained NFT metadata Given a set of trait types (e.g., background, eyes, hat), each with a list of allowed values, and a target count N, ...
Coding & Algorithms
15
0
120 people solved
Jul 26, 2025
Medium
Data ScientistQuant Trading Game: Expected-Value Betting and Market Making on Coins, Dice, and Cards
Quant Trading Game: Expected-Value Betting and Market Making on Coins, Dice, and Cards You are playing a live, 30-minute trading game against the inte...
Machine Learning
4
0
47 people solved
Jul 25, 2025
Easy
Software EngineerImplement 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...
Coding & Algorithms
34
0
386 people solved
Dec 23, 2025