Interview Questions
Practice the exact questions companies are asking right now.
Questions
9.7k
Companies
511
Updated
08.16.2026
9.7k 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 EngineerDesign a Scalable and Safe Agentic System
Design a Scalable and Safe Agentic System Design a service that accepts a user goal, lets an AI agent plan and invoke approved tools, and returns a re...
ML System Design
81
0
550 people solved
Jul 10, 2026
Easy
Software EngineerCount Rectangle Coverage on a Grid
Count Rectangle Coverage on a Grid You are given an n x n grid initially filled with zeroes and a list of inclusive rectangular updates. Each rectangl...
Coding & Algorithms
43
2
346 people solved
Jul 21, 2026
Medium
Software EngineerSenior+Find Paths Across a Weighted Binary Grid
Find Paths Across a Weighted Binary Grid Given an m by n binary grid, a cell with value 1 is traversable and 0 is blocked. Movement is allowed up, dow...
Coding & Algorithms
17
0
258 people solved
Jul 17, 2026
Medium
Software EngineerSenior+Design Chat Deletion Semantics Under Concurrent Sends
Design Chat Deletion Semantics Under Concurrent Sends Design the backend of a chat application that supports creating threads, sending messages, readi...
System Design
31
1
289 people solved
Jul 14, 2026
Hard
Software EngineerOptimize a Two-Box Place-or-Take Game
Optimize a Two-Box Place-or-Take Game A one-player game has two opaque boxes and lasts exactly 100 turns. On a place turn, a third party adds one unit...
Statistics & Math
8
0
70 people solved
Aug 3, 2026
Easy
Backend EngineerBuild a CSV-to-JSON Classification Service
Build a CSV-to-JSON Classification Service Build a backend service in stages. First, an HTTP request supplies a server-visible CSV path and the servic...
Software Engineering Fundamentals
5
0
103 people solved
Jul 27, 2026
Hard
Machine Learning EngineerDeploy a Large Model to GPU Workers
Deploy a Large Model to GPU Workers Design a system that distributes a 500 GB model artifact to a fleet of 100 to 1,000 GPU workers. External ingress ...
System Design
74
0
520 people solved
Jul 8, 2026
Medium
Machine Learning EngineerReturn Every Index Pair Whose Values Sum to a Target
Return Every Index Pair Whose Values Sum to a Target Problem Implement all_pairs_sum(nums, target). Given an unordered array of integers, return every...
Coding & Algorithms
7
0
57 people solved
Aug 5, 2026
Medium
Software EngineerDesign a Hotel Search and Reservation System
Design a Hotel Search and Reservation System Design a hotel system with APIs, database schema, and query paths for property discovery, date-range avai...
System Design
9
0
120 people solved
Jul 22, 2026
Hard
Software EngineerDesign a High-Throughput Payment Authorization and Settlement System
Design a payment system that handles about 10,000 transaction requests per second. Each transaction first goes to an external payment service for appr...
System Design
5
0
39 people solved
Aug 10, 2026
Hard
Software EngineerDesign a Music Playlist Service
Design a Music Playlist Service Design a service where users create playlists, add or remove tracks, reorder items, and retrieve a playlist in playbac...
System Design
11
0
104 people solved
Jul 25, 2026
Medium
Software EngineerPrepare for Backend Parsing, API Integration, AI Coding, and Bug Fixing Rounds
Prepare for backend parsing, extensible class design, API integration, AI-assisted coding, bug fixing, and a hiring-manager round. `hint Hint 1 Start ...
Software Engineering Fundamentals
88
1
1286 people solved
Jul 4, 2026
Medium
Software EngineerDesign a Billing-Token Rate Limiter for AI Agents
Design a Billing-Token Rate Limiter for AI Agents Design a rate limiter that controls the number of billing tokens consumed by AI-agent requests. Requ...
System Design
4
0
69 people solved
Aug 1, 2026
Medium
Software EngineerBuild a Three-Service Refund Workflow over HTTP
Build a Three-Service Refund Workflow over HTTP For this exercise, build three independently running local services: - Order Service owns order data a...
Software Engineering Fundamentals
5
0
54 people solved
Aug 4, 2026
Medium
Software EngineerDescribe a Strongly Held View That Proved Wrong
Describe a Strongly Held View That Proved Wrong Tell me about a technical or product decision you argued for strongly and later learned was wrong. Exp...
Behavioral & Leadership
7
0
74 people solved
Jul 30, 2026
Medium
Software EngineerDesign Online Chess Matchmaking and Clocks
Design the backend for online chess games with skill-based matchmaking and authoritative countdown clocks. Players enter a queue for a selected time c...
System Design
4
0
41 people solved
Aug 8, 2026
Medium
Software EngineerDesign an Extensible In-Memory Logger and Keyword Search
Design an Extensible In-Memory Logger and Keyword Search Design an object-oriented in-memory logger that can store messages and independently support ...
Software Engineering Fundamentals
10
0
93 people solved
Jul 24, 2026
Medium
Machine Learning Engineer LockedImplement Masked Cross-Entropy with Label Smoothing
Implement numerically stable masked cross-entropy in NumPy with label smoothing and optional temperature scaling. Validate shapes, dtypes, finite logi...
Machine Learning
72
1
617 people solved
Jun 27, 2026
Hard
Software EngineerSenior+Design a News Subscription Processing Engine
Design a news subscription processing engine with four core capabilities: receive a news item, add a subscription, remove a subscription, and publish ...
Software Engineering Fundamentals
11
0
185 people solved
Jul 19, 2026
Hard
Software EngineerDesign Retrieval-Augmented Answers from a Document Vault
Design a service that accepts a user's prompt, searches a large document vault, and returns a grounded answer with citations to relevant source passag...
ML System Design
11
0
114 people solved
Jul 27, 2026