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
Medium
Data ScientistDecide whether to invest in R&D
Should we invest now in a Vegan burger? Build a decision narrative Context Assume you are the owner of a 100‑location fast‑casual burger chain evaluat...
Behavioral & Leadership
2
0
39 people solved
Oct 13, 2025
Hard
Data ScientistCompare CNN, RNN, and LSTM rigorously
Sequence Modeling: Rigorous Comparison of CNNs, RNNs, and LSTMs Context and assumptions: - We are modeling 1D sequences of shape (batch=32, time=100, ...
Machine Learning
3
0
55 people solved
Oct 13, 2025
Medium
Data ScientistFind duplicates in a list efficiently
Given a Python list that can contain integers (possibly negative) and may be very large, write code and explain approaches to find all values that app...
Coding & Algorithms
18
0
178 people solved
Oct 13, 2025
Medium
Data ScientistChoose linear regression or decision tree appropriately
Choose Between Linear Regression and a Decision Tree Under a Hinge and Interaction DGP Context You have 100,000 i.i.d. observations with features x1 (...
Machine Learning
4
0
53 people solved
Oct 13, 2025
Medium
Data ScientistCompare bagging vs boosting on imbalanced data
Fraud Detection on 10M Time-Ordered Transactions (0.5% Fraud) You are building a binary classifier to detect 0.5% fraudulent events among 10,000,000 t...
Machine Learning
5
0
43 people solved
Oct 13, 2025
Medium
Data ScientistWrite SQL to flag coordinated fake accounts
Assume today is 2025-09-01. Schema and tiny samples: users(user_id, created_at, country) 1 | 2025-07-01 | US 2 | 2025-08-10 | IN 3 | 2025-08-15 | US 4...
Data Manipulation (SQL/Python)
0
0
7 people solved
Oct 13, 2025
Hard
Data ScientistManage promotions and project portfolio tradeoffs
Context You manage a 10-person Data Science team operating across multiple locations and time zones. Three senior individual contributors (ICs) are ac...
Behavioral & Leadership
5
0
44 people solved
Oct 13, 2025
Medium
Data ScientistExclude free subscribers via anti-join
Extend your previous monthly new-subscriber + YoY query to exclude companies that ever received a free subscription, using an anti-join against Free_S...
Data Manipulation (SQL/Python)
0
0
4 people solved
Oct 13, 2025
Medium
Data ScientistCompute monthly new subscribers and YoY deltas
Write a single SQL query that returns monthly counts of new subscribers starting at 2019-06, plus year-over-year (same-month prior year) comparisons. ...
Data Manipulation (SQL/Python)
0
0
5 people solved
Oct 13, 2025
Medium
Data ScientistCompute 7-day views and reactions by relationship
Use the schemas and sample data below to answer two tasks. Assume dates are strings in 'YYYY-MM-DD'. Treat "today" as 2025-09-01; "last/past 7 days" m...
Data Manipulation (SQL/Python)
0
0
5 people solved
Oct 13, 2025
Medium
Data ScientistJoin datasets and compute conversion by assignment
You are given two CSVs. Create tables and write SQL to produce both visit-level and visitor-level conversion datasets, then aggregate conversion by as...
Data Manipulation (SQL/Python)
0
0
5 people solved
Oct 13, 2025
Medium
Data ScientistDesign logical model and consumption
Design a logical data model and consumption layer supporting business and technical services architecture. Provide an ERD‑level description for Accoun...
Data Manipulation (SQL/Python)
0
0
7 people solved
Oct 13, 2025
Medium
Data ScientistArchitect cloud data ingestion patterns
Propose a cloud data ingestion and serving pattern for streaming and batch on your preferred cloud (AWS/Azure/GCP). Choose between CDC, event sourcing...
Data Manipulation (SQL/Python)
4
0
38 people solved
Oct 13, 2025
Medium
Data ScientistMap sources to functional dataset with SQL
You must produce a functional, consumption‑ready dataset for daily exposure monitoring. Assume “today” = 2025‑09‑01. Use the last 7 calendar days by t...
Data Manipulation (SQL/Python)
0
0
3 people solved
Oct 13, 2025
Medium
Data ScientistWalk through end‑to‑end delivery
Walk Through a Program You Led Across the Full Lifecycle (Data Science) Provide a concrete example of one program you personally led or owned end-to-e...
Behavioral & Leadership
3
0
36 people solved
Oct 13, 2025
Medium
Data ScientistDemonstrate domain impact with metrics
Behavioral Prompt: Impactful Initiative in Financial Services (Data Science) Context You will describe a high-impact initiative you delivered in banki...
Behavioral & Leadership
3
0
31 people solved
Oct 13, 2025
Medium
Data ScientistExplain education-to-impact alignment
Data Scientist Technical Screen: Education/Experience Evidence and Impact Examples Context You are interviewing for a Data Scientist role in a technic...
Behavioral & Leadership
2
0
34 people solved
Oct 13, 2025
Hard
Data ScientistExplain streaming move and industry tradeoffs
HBO Max Data Scientist — Take‑Home Prompts Context You are applying for a Data Scientist role focused on consumer streaming. Answer the following conc...
Behavioral & Leadership
3
0
31 people solved
Oct 13, 2025
Hard
Data ScientistDesign an A/B for rare cancellations
A/B Test Design: Autoplay-Preview on the Home Page Context: A streaming service is testing an autoplay-preview feature on the home page. Weekly cancel...
Analytics & Experimentation
1
0
24 people solved
Oct 13, 2025
Medium
Data ScientistAggregate video time and unique pins in Python
Part A (category by average time for videos): You receive a list of pin engagement rows and a category map. pins = [ {"pin_id": 10, "category_id": 1,...
Data Manipulation (SQL/Python)
1
0
8 people solved
Oct 13, 2025