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 EngineerDesign a GPU inference API
Design a scalable, GPU-backed inference API that serves multiple ML models — including large autoregressive models such as LLMs — to internal product ...
ML System Design
116
0
863 people solved
Aug 1, 2025
Hard
Machine Learning EngineerSenior+Design a Multi-Agent Document Search and Visualization Product
Design a Multi-Agent Document Search and Visualization Product Design a document-analysis product that searches PDF content, extracts figures and tabl...
ML System Design
0
0
11 people solved
Jun 6, 2026
Medium
Software Engineer LockedDesign a geography-aware virtual card service
This question evaluates a candidate's ability to design secure, low-latency, geography-aware payment systems, covering distributed systems architectur...
System Design
59
0
449 people solved
Feb 12, 2026
Medium
Software Engineer LockedDesign an Online Coding Judge Platform
This question evaluates a candidate's competencies in large-scale system design, secure multi-tenant execution and sandboxing, capacity planning, queu...
System Design
131
0
902 people solved
May 2, 2026
Medium
Software Engineer LockedDesign Cloud File Storage
This question evaluates system design competency, specifically understanding storage architectures, the separation of metadata versus blob/object stor...
System Design
33
0
337 people solved
May 2, 2026
Medium
Software EngineerSenior+Design a News Feed and Mail Service
Design the following systems: 1. Aggregate news feed Build a service that ingests articles from many publishers, deduplicates and ranks them, and s...
System Design
26
0
198 people solved
Feb 22, 2026
Medium
Backend EngineerDesign Tennis Scoring with Pluggable Rules
Design Tennis Scoring with Pluggable Rules Prompt Design a small scoring component for one tennis game between two players. It must record which playe...
Software Engineering Fundamentals
3
0
35 people solved
May 6, 2026
Medium
Software Engineer LockedDesign CSV upload endpoint with GPT classification
This question evaluates backend engineering skills including HTTP API design, multipart file handling, CSV parsing and serialization, local JSON persi...
Software Engineering Fundamentals
78
0
928 people solved
Dec 8, 2025
Hard
Software EngineerDesign ledger and bikemap integration
System Design: Strongly Consistent Ledger + External Service Integration Design two loosely related components for a production-grade environment, and...
System Design
349
0
2537 people solved
Jul 29, 2025
Easy
Software EngineerImplement buffered file writer with concurrency support
You are given a simple file writer class that writes data directly to disk: `cpp class FileWriter { public: // Append data to the file on disk imm...
Coding & Algorithms
70
0
745 people solved
Dec 2, 2025
Medium
Software Engineer LockedTop-K Largest Elements in Every Sliding Window
This question evaluates the ability to design and maintain an ordered data structure that efficiently tracks the top K largest values within a moving ...
Coding & Algorithms
1
0
21 people solved
Jun 22, 2026
Medium
Machine Learning Engineer LockedDesign a chatbot over structured and unstructured data
This question evaluates a machine learning engineer's ability to design end-to-end systems that integrate structured and unstructured data, testing co...
ML System Design
18
0
249 people solved
Feb 8, 2026
Hard
Data Scientist LockedSolve probability and stopping questions
This set of problems evaluates probabilistic reasoning and mathematical statistics skills, covering convolution for sums of independent variables, exp...
Statistics & Math
18
0
354 people solved
Mar 14, 2026
Hard
Data ScientistInternAlternating Die-Roll Game: Optimal Accept/Reject Strategy
Two players, A and B, play the following game with a fair 21-sided die whose faces are labeled with the integers $-10, -9, \ldots, 9, 10$ (one integer...
Software Engineering Fundamentals
18
1
139 people solved
Nov 20, 2025
Hard
Software EngineerNew GradReviewing a Freight-Scheduler Codebase: Bugs, Data Structures, and Concurrency
You have just finished implementing process_order(...) inside a large provided codebase for a freight-scheduling system (this is the review stage of a...
Software Engineering Fundamentals
17
0
206 people solved
Nov 16, 2025
Hard
Data ScientistDesign a free-month experiment
An online subscription product is considering a promotion that gives eligible new users their first month free instead of charging immediately. Design...
Analytics & Experimentation
57
0
413 people solved
Feb 3, 2026
Medium
Software Engineer LockedDesign a Scalable Notification System
This question evaluates a candidate's ability to design a large-scale, asynchronous notification platform that fans messages out across push, email, a...
System Design
9
0
105 people solved
Jun 9, 2026
Medium
Data ScientistAnalyze Correlations and Generate Gaussians
You are interviewing for a quantitative data science role. Answer the following probability and simulation questions: 1. Let \(X\), \(Y\), and \(Z\) b...
Machine Learning
22
0
212 people solved
Feb 21, 2026
Hard
Data ScientistIntern LockedHow would you forecast bike demand?
This question evaluates a candidate's competency in time-series forecasting, feature engineering, model selection, and evaluation for short-horizon de...
Machine Learning
15
1
133 people solved
Apr 2, 2026
Hard
Machine Learning EngineerBuild a time-series forecasting model
Build a time-series forecasting model Forecast the Next H Steps for Time Series Context You are given one or more time series with timestamps and nume...
Machine Learning
48
0
586 people solved
Aug 1, 2025