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
Data Scientist LockedMeasure free-month promotion impact
This question evaluates causal inference and experimentation skills, including randomized design and estimand framing, metric and ROI attribution, han...
Analytics & Experimentation
16
0
143 people solved
Jan 15, 2026
Medium
Data ScientistInternDescribe past project experience clearly
You are interviewing for a Data Scientist Intern role in an asynchronous video interview format. Prepare concise, structured responses to the followin...
Behavioral & Leadership
5
0
52 people solved
Apr 1, 2026
Hard
Machine Learning Engineer LockedImplement local maxima, bagging, and k-means
This set of tasks evaluates algorithmic problem-solving and implementation skills across array processing (local maxima), ensemble methods (bagging cl...
Coding & Algorithms
19
0
132 people solved
Feb 1, 2026
Hard
Machine Learning Engineer LockedExplain precision/recall and compute NN output
This question evaluates understanding of classification evaluation metrics (precision, recall, F1), ensemble learning principles (bagging vs boosting,...
Machine Learning
13
0
139 people solved
Feb 1, 2026
Hard
Data ScientistDerive the Optimal Bid in a Two-Bidder Second-Price Auction
Derive the Optimal Bid in a Two-Bidder Second-Price Auction Two risk-neutral bidders compete for one item in a sealed-bid second-price auction. Your p...
Statistics & Math
0
0
12 people solved
Nov 25, 2025
Medium
Data EngineerDeliver a concise self-introduction
Deliver a concise self-introduction Behavioral Prompt: 1–2 Minute Self‑Introduction for a Data Engineer Technical Screen Context You are interviewing ...
Behavioral & Leadership
12
0
109 people solved
Aug 1, 2025
Easy
Data ScientistPrioritize competing engineering requests
Scenario You are a Data Scientist/Analytics partner supporting multiple engineering teams. Two (or more) teams simultaneously ask you to prioritize th...
Behavioral & Leadership
3
0
61 people solved
Dec 11, 2025
Hard
Software EngineerMerge Two Sorted Arrays
Merge Two Sorted Arrays Given two integer arrays sorted in nondecreasing order, return a new array containing every value from both inputs in nondecre...
Coding & Algorithms
1
0
13 people solved
Jul 14, 2026
Hard
Software Engineer LockedFind Shortest Square-Sum Path
This question evaluates algorithmic problem-solving skills with number-theoretic reasoning about perfect squares and the ability to reconstruct a mini...
Coding & Algorithms
0
0
7 people solved
May 16, 2026
Medium
Software EngineerSolve three algorithmic OA tasks
Solve three algorithmic OA tasks Task 1 (Odd-frequency string): Given an integer N in [1..200000], write an algorithm that returns any length-N string...
Coding & Algorithms
13
0
142 people solved
Jul 31, 2025
Medium
Software EngineerImplement custom iterators and interfaces
Implement custom iterators and interfaces Define a minimal Iterator interface (e.g., hasNext(), next()) for integers without using IDE-generated scaff...
Coding & Algorithms
16
0
142 people solved
Jul 31, 2025
Medium
Software Engineer LockedDesign a Customer Review Page
This question evaluates skills in system architecture, data modeling, API design, storage and search solutions, media handling, ranking, pagination, c...
System Design
10
0
176 people solved
Jan 31, 2026
Medium
Software EngineerNew GradAnswer common leadership prompts
Prepare strong STAR-style answers for the following behavioral prompts from the interview: - Describe an important project you delivered under a tight...
Behavioral & Leadership
7
0
107 people solved
Oct 24, 2025
Medium
Software Engineer LockedDesign Restart Strategy for Oracle Solver
This question evaluates understanding of probabilistic runtime analysis and restart strategies for randomized (Las Vegas-style) solvers, including exp...
Machine Learning
10
0
86 people solved
Jan 13, 2026
Medium
Data ScientistHow to estimate a feature’s causal impact on time spent
You work on a Roblox-like game platform. A new product change ("feature") is rolled out and you want to estimate its causal impact on user engagement,...
Analytics & Experimentation
11
0
211 people solved
Jan 13, 2026
Medium
Software EngineerDesign cloud storage system
Design cloud storage system In-Memory Cloud Storage: Design and Implement You are asked to design and implement an in-memory cloud storage system that...
System Design
70
0
231 people solved
Jul 29, 2025
Hard
Machine Learning EngineerDiscuss Projects, Failures, and Growth
Prepare structured answers for the following behavioral prompts from an interview: - Describe the project you are most proud of. - What was the hardes...
Behavioral & Leadership
15
0
120 people solved
Jan 30, 2026
Easy
Data ScientistSenior+Design and evaluate a RAG system
You are interviewing for an L5 Data Scientist role focused on LLM applications. Design a retrieval-augmented generation (RAG) system for an internal q...
Machine Learning
15
0
122 people solved
Jan 12, 2026
Hard
Machine Learning EngineerSenior+ LockedDesign an unsafe content detection system
This question evaluates a candidate's competency in end-to-end machine learning system design for unsafe user-generated content detection, covering mu...
ML System Design
12
0
125 people solved
Jan 12, 2026
Medium
Data ScientistSenior+Compute a Seven-Day Rolling Average
Compute a Seven-Day Rolling Average Write one PostgreSQL SELECT statement or CTE query. Do not create, alter, or modify tables. Schema daily_metrics |...
Data Manipulation (SQL/Python)
0
0
7 people solved
Mar 30, 2026