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
Hard
Software EngineerDesign and operate a monolith on Kubernetes
Design and Operate a Monolith on Kubernetes Context You are joining an infrastructure team. The backend is a single monolithic service. The company is...
System Design
34
0
238 people solved
Sep 6, 2025
Hard
Software EngineerDesign a price tracking system
Question Design a price tracking system for e-commerce sites (similar to price-history tools such as CamelCamelCamel or Keepa). The system ingests pro...
System Design
13
0
142 people solved
Sep 6, 2025
Medium
Software EngineerDesign large video upload for a YouTube-like app
System Design Prompt Design the video upload subsystem for a YouTube-like product that supports large video files. Core user flow 1. User selects a la...
System Design
6
0
103 people solved
Dec 13, 2025
Medium
Software Engineer LockedDesign a URL Shortener
This question evaluates system design and distributed systems competencies, including scalability, availability, data modeling, API design, caching, s...
System Design
6
0
91 people solved
Jan 19, 2026
Medium
Data ScientistNew Grad LockedEvaluate marketplace interventions
This question evaluates a data scientist's competency in product analytics, causal inference, and experimentation design for two-sided marketplaces, f...
Analytics & Experimentation
14
0
101 people solved
Mar 22, 2026
Easy
Data ScientistDescribe a challenging project and how you succeeded
Behavioral prompts Answer the following using a structured format (e.g., STAR: Situation, Task, Action, Result), focusing on your contributions, trade...
Behavioral & Leadership
6
0
76 people solved
Feb 7, 2026
Medium
Software EngineerHow would you throttle a crawler?
The crawler above is now a production service. Expanding each page requires an outbound HTTP or API call to fetch its links, and upstream services may...
System Design
4
0
75 people solved
Feb 28, 2026
Medium
Software EngineerBuild a Progressive Banking System
Build a Progressive Banking System The source reports progressive account, activity-ranking, expiring-transfer, and merge features but not exact retur...
Coding & Algorithms
1
0
15 people solved
Jul 11, 2026
Medium
Data ScientistSenior+ LockedInterpret a Streaming Regression Without Overstating Causality
Learn to explain regression coefficients and confidence intervals to a product partner without turning association into causation. Examine confounding...
Analytics & Experimentation
0
0
16 people solved
Jun 7, 2026
Medium
Software EngineerSenior+Design a Real-Time Auction Platform
Design a real-time online auction platform. Users can browse an auction, submit bids, and see the current highest bid and bid history update live. Tra...
System Design
2
0
43 people solved
Apr 14, 2026
Medium
Machine Learning EngineerDesign Ordered CUDA Reduction
In CUDA, a parallel reduction can produce different results if the combination order is not fixed, especially for floating-point arithmetic where addi...
Software Engineering Fundamentals
6
0
56 people solved
Apr 14, 2026
Medium
Machine Learning EngineerSenior+ LockedResolve a Design Conflict
This question evaluates conflict resolution, stakeholder management, technical decision-making, and collaborative leadership skills within a Machine L...
Behavioral & Leadership
7
0
55 people solved
Feb 7, 2026
Hard
Software EngineerDesign a follower push-notification system
Design a notification system for a social product: - When a user publishes a new post, the system should send push notifications to that user’s follow...
System Design
25
0
211 people solved
Feb 7, 2026
Medium
Software Engineer LockedImplement matrix transforms and discuss eigenvalues
This question evaluates understanding of matrix manipulation and numerical linear algebra, including in-place matrix transforms and rotations, sparse ...
Software Engineering Fundamentals
4
0
58 people solved
Feb 7, 2026
Medium
Data ScientistSenior+How would you use propensity score matching here
You want to estimate the causal effect of a new recommender feature on 7-day retention. The feature was not randomized: users “opt in” after seeing a ...
Analytics & Experimentation
20
0
162 people solved
Nov 24, 2025
Hard
Machine Learning EngineerPredict future time-series values
Predict future time-series values End-to-End Time-Series Forecasting (PyTorch) Context You are given one or more regularly sampled numeric time series...
ML System Design
25
0
269 people solved
Aug 4, 2025
Hard
Software EngineerDesign loan application system
Design an End-to-End Loan Application Platform You are a software engineer at a small lending startup. Design a scalable, compliant loan origination s...
System Design
66
0
465 people solved
Aug 4, 2025
Hard
Data ScientistDesign a System to Recommend Local Restaurant Profiles
Design a System to Recommend Local Restaurant Profiles Recommending Local Restaurant Pages in the News Feed Context Design a non-ads recommendation sy...
Machine Learning
4
0
65 people solved
Aug 4, 2025
Hard
Software Engineer LockedDesign a High-Availability Load Balancer
This question evaluates knowledge of distributed systems and load balancing principles, covering high-availability architecture for HTTP/HTTPS traffic...
System Design
19
0
187 people solved
May 9, 2026
Medium
Software Engineer LockedImplement Price-Time Order Matching
This question evaluates understanding of limit-order book mechanics, priority-based matching, stateful stream processing, and data-structure managemen...
Coding & Algorithms
6
0
36 people solved
May 9, 2026