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+Detect Recent Duplicate Records with Bounded Memory
Detect Recent Duplicate Records with Bounded Memory A time-ordered stream contains records [id, text, title, timestamp]. Detect records whose exact (t...
Coding & Algorithms
2
1
25 people solved
Jul 1, 2026
Hard
Machine Learning Engineer LockedImplement Grouped-Query Attention (GQA)
This question evaluates a candidate's understanding of transformer attention mechanisms, specifically how grouped-query attention balances the memory ...
Machine Learning
12
0
85 people solved
Jun 25, 2026
Medium
Software EngineerImplement a RESTful Q&A service
You are asked to build a small REST service (in any language/framework you choose) that resembles a minimal Stack Overflow-style Q&A system. Design an...
Software Engineering Fundamentals
36
0
420 people solved
Jan 16, 2026
Easy
Data ScientistDefine Ultra success metrics and detect suspicious transactions
You work on a fintech product with these existing tables (UTC timestamps). You may only use these tables/columns; if a metric cannot be measured direc...
Analytics & Experimentation
24
0
226 people solved
Feb 4, 2026
Medium
Backend EngineerDebug and Improve a Load Balancer
Debug and Improve a Load Balancer Clarifying Questions to Ask - Is the load balancer a single process exercise or a distributed production service? - ...
Software Engineering Fundamentals
4
0
46 people solved
May 6, 2026
Medium
Software EngineerReview AI Platform And Software Fundamentals
Prepare for an AI platform engineering interview that asks about RAG, indexing, database choices, evaluators, stream data handling, OOP principles, bi...
Software Engineering Fundamentals
3
0
30 people solved
Jul 7, 2026
Medium
Software Engineer LockedDesign an ads event reporting system
This question evaluates a candidate's ability to design scalable, reliable event ingestion and analytics systems, testing competencies in distributed ...
System Design
44
0
310 people solved
Jan 22, 2026
Medium
Software EngineerDesign a coffee ordering system
System Design: Coffee Ordering System Design a system for a coffee shop (and later a chain of stores) that lets customers order drinks for pickup or i...
System Design
801
4
7433 people solved
Jan 22, 2026
Easy
Machine Learning EngineerDesign a robot movement command system
Robot Movement (Pair Programming) You are given an empty starter repository (only a README). Implement a small, testable robot movement module that ca...
Coding & Algorithms
57
0
510 people solved
Dec 15, 2025
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 Camera Health Monitoring
Design a system that monitors the health of 10 million cameras and continuously reports, in near real time, how many devices are healthy and how many ...
System Design
31
0
343 people solved
Apr 2, 2026
Medium
Software Engineer LockedDesign a Perishable-Goods Inventory and Location Tracking System
This system design question evaluates the ability to architect a location-tracking and inventory service for perishable goods across a distributed ret...
System Design
5
0
65 people solved
Jun 13, 2026
Medium
Software Engineer LockedDesign an Instagram-Style Social Feed
A Meta software-engineer onsite system-design question: design an Instagram-style social feed (photo/video sharing with a personalized home feed). It ...
System Design
7
0
88 people solved
May 14, 2026
Medium
Frontend EngineerBuild an Accessible Recursive Expand-and-Collapse Tree in React
Build an Accessible Recursive Expand-and-Collapse Tree in React Implement a React component that renders hierarchical data with + and - controls for c...
Software Engineering Fundamentals
2
0
22 people solved
Jul 13, 2026
Medium
Software EngineerDesign fulfillment truck routing and inventory system
Scenario You are designing the software platform for a large e-commerce fulfillment network that plans truck routes and manages container/inventory mo...
System Design
63
0
738 people solved
Mar 1, 2026
Hard
Software EngineerDesign a user behavior tracking system
Problem Design a User Behavior Tracking System that collects and analyzes user events from mobile and web applications across multiple products. The s...
System Design
119
0
809 people solved
Feb 11, 2026
Medium
Software EngineerDescribe a Mentoring Experience and Its Outcome
Describe a Mentoring Experience and Its Outcome Tell me about a time you mentored another engineer. How did you understand what they needed, what did ...
Behavioral & Leadership
2
0
25 people solved
Jul 6, 2026
Medium
Data ScientistEvaluate a New Ads-Ranking Algorithm
Evaluate a New Ads-Ranking Algorithm An ads team has developed a new ranking algorithm that chooses which ad to show for each eligible opportunity. En...
Analytics & Experimentation
1
0
39 people solved
May 22, 2026
Medium
Software Engineer LockedDesign a Text-to-Video Generation Service
This question evaluates understanding of ML system design, distributed scheduling, durable asynchronous job pipelines, GPU resource orchestration, and...
ML System Design
14
0
156 people solved
May 22, 2026
Hard
Software EngineerDesign a Donation Platform
Question Design an online donation platform that lets users discover and contribute to charity campaigns or nonprofit organizations. Payment execution...
System Design
16
0
140 people solved
Apr 24, 2026