Interview Questions
Practice the exact questions companies are asking right now.
Questions
9.8k
Companies
511
Updated
08.16.2026
9.8k Questions 511 Companies08.16.2026
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
Hard
Software EngineerSenior+Design a Time-Series Database
Design a Time-Series Database Design a database for ingesting and querying timestamped measurements. A data point belongs to a logical series identifi...
System Design
0
0
14 people solved
Jul 9, 2026
Medium
Software Engineer LockedDesign a Slack-Like Messaging System
This question evaluates a candidate's ability to architect a real-time team messaging platform, testing competencies in distributed systems, data mode...
System Design
50
0
441 people solved
May 14, 2026
Medium
Backend EngineerFind the Closest Candidate String by Edit Distance
Find the Closest Candidate String by Edit Distance Problem Implement closestCandidates(candidates, queries) -> results. The edit distance between two ...
Coding & Algorithms
0
0
5 people solved
Jul 15, 2026
Easy
Software EngineerReview a Web Application Architecture
You are given a high-level architecture diagram for a web application: Client/Web App -> DNS -> Load Balancer -> Application Service -> Database The a...
System Design
13
0
130 people solved
Apr 11, 2026
Medium
Software EngineerDebug a Random Dasher Registry
Debug a Random Dasher Registry A registry supports adding dashers and randomly selecting and removing one. It uses a dense array of dasher IDs plus a ...
Software Engineering Fundamentals
2
0
27 people solved
Apr 3, 2026
Hard
Software EngineerImplement Python feature and resolver metaprogramming
You are given a skeleton for a small Python "feature" framework. The goal is to use metaprogramming to: 1. Parse type-annotated classes into Feature o...
Coding & Algorithms
83
0
607 people solved
Sep 27, 2025
Medium
Software EngineerImplement Fixed-Window Get and Put QPS Tracking
Implement Fixed-Window Get and Put QPS Tracking Design a key-value service with put, get, and load-reporting APIs. Track get and put calls separately ...
Software Engineering Fundamentals
0
0
9 people solved
Jun 21, 2026
Hard
Software EngineerSenior+ LockedDesign a Distributed Metrics Counter
This question evaluates a candidate's competency in designing scalable, highly available distributed systems for real-time telemetry ingestion and agg...
System Design
20
0
238 people solved
Mar 1, 2026
Medium
Data ScientistNew Grad LockedDesign Uber Eats Restaurant Recommendations
This question evaluates a candidate's ability in end-to-end machine learning system design for personalized restaurant recommendations in a food-deliv...
ML System Design
28
0
223 people solved
Apr 30, 2026
Medium
Software EngineerSolve a Jigsaw Puzzle
You are given a collection of jigsaw puzzle pieces. Each piece has four edges — top, right, bottom, and left — and a helper function match(edgeA, edge...
Coding & Algorithms
76
0
798 people solved
Apr 2, 2026
Medium
Software EngineerDesign a delivery cost system
Design an object-oriented, in-memory Delivery Cost System for a food-delivery company. Drivers register with an hourly rate, completed deliveries are ...
System Design
164
0
1522 people solved
Jul 31, 2025
Medium
Backend EngineerSenior+Design a Thread-Safe Bounded Blocking Queue
Design a Thread-Safe Bounded Blocking Queue Design a fixed-capacity FIFO queue shared by multiple producer and consumer threads. Provide operations eq...
Software Engineering Fundamentals
2
0
20 people solved
Jul 2, 2026
Medium
Software EngineerCollect Pins from Reachable Boards
Collect Pins from Reachable Boards The interview report names a board-and-pin coding problem whose intended approach was breadth-first search but does...
Coding & Algorithms
1
0
20 people solved
Jul 2, 2026
Medium
Software Engineer AI LockedCourier Delivery Cost Tracker
This question evaluates a candidate's ability to design a stateful, multi-part class that combines interval tracking with incremental balance accounti...
Coding & Algorithms
2
0
36 people solved
Jun 10, 2026
Hard
Software EngineerImplement a Longest-Match Tokenizer
Implement a Longest-Match Tokenizer The source reports longest matching, unknown-token handling, and an optional unknown-merging extension. The exact ...
Coding & Algorithms
3
0
24 people solved
Jul 8, 2026
Hard
Backend EngineerNew Grad LockedBackend Fundamentals Deep Dive: MySQL Internals, Redis, and the HTTP/HTTPS Request Lifecycle
This question tests deep backend engineering knowledge across three core domains: MySQL InnoDB internals (logging, indexing, isolation), Redis persist...
Software Engineering Fundamentals
7
0
72 people solved
Jun 15, 2026
Hard
Software EngineerSenior+Design an Ad Pacing System
Design an advertising pacing system for a large-scale video / streaming advertising platform. Advertisers create campaigns with budgets, flight dates ...
System Design
41
0
370 people solved
Apr 5, 2026
Medium
Machine Learning EngineerSenior+ LockedDesign a Game Recommendation System
This question evaluates mastery of designing scalable end-to-end machine learning recommendation systems, including candidate generation, multi-stage ...
ML System Design
14
0
162 people solved
May 7, 2026
Easy
Machine Learning Engineer LockedDesign a Social Feed
Design a personalized social feed that balances fresh and ranked content while supporting posts, follows, deletions, privacy, and stable pagination. T...
System Design
5
0
67 people solved
May 30, 2026
Medium
Machine Learning Engineer LockedDesign an advertiser metrics tracking platform
This question evaluates object-oriented design competencies such as domain modeling, class responsibilities and relationships, service interfaces, ext...
Software Engineering Fundamentals
24
0
167 people solved
May 30, 2026