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 ScientistPrioritize projects and manage tight deadlines
Q4 Planning Scenario: Prioritization, Scope, and Stakeholder Leadership You are the sole data lead for Q4 supporting three initiatives with fixed spon...
Behavioral & Leadership
7
0
95 people solved
Oct 13, 2025
Medium
Data ScientistAnalyze Cancellation Change with Statistics
A/B change in cancellation rate (before vs after) Context: You are evaluating a small product tweak intended to reduce cancellations. Treat each trip ...
Statistics & Math
6
0
99 people solved
Oct 13, 2025
Medium
Data ScientistWrite SQL and Pandas for Uber Trips
Assume 'today' = 2025-09-01. You are given the following schema and small ASCII samples. Tables - riders(rider_id, name, signup_date) - drivers(driver...
Data Manipulation (SQL/Python)
0
0
12 people solved
Oct 13, 2025
Medium
Data ScientistDescribe navigating ambiguous, repetitive questioning
Behavioral: Handling Repeated, "Fishing" Questions Context: You're a Data Scientist in a technical screen or stakeholder review. The other person keep...
Behavioral & Leadership
7
0
84 people solved
Oct 13, 2025
Hard
Data ScientistDesign and validate a cost-sensitive classifier
Binary Purchase Prediction with Delayed Labels and Imbalanced Classes Context - Goal: Ship a real-time binary classifier that predicts whether a user ...
Machine Learning
5
0
51 people solved
Oct 13, 2025
Hard
Data ScientistTest 15s to 60s video length change
Experiment Design: Change Default Creator Video Length from 15s to 60s Context You are designing an A/B test for a short‑form video platform with two ...
Analytics & Experimentation
8
0
66 people solved
Oct 13, 2025
Medium
Data ScientistWrite SQL and Python for transaction analytics
You are given user and transaction data. Part A (SQL): Use a join and window functions to answer the prompts below using the following schema and samp...
Data Manipulation (SQL/Python)
11
0
158 people solved
Oct 13, 2025
Hard
Data ScientistDemonstrate ownership and communication under pressure
Behavioral Interview: Ownership, Dive Deep, Raise the Bar (Data Scientist) Provide concise, data-backed stories using STAR (Situation, Task, Action, R...
Behavioral & Leadership
3
0
37 people solved
Oct 13, 2025
Hard
Data ScientistInterpret and validate regression with interactions
Modeling 7-day Retention with LPM and Logistic Regression Context You have user-level data with a binary outcome retained_7d (1 if the user is active ...
Statistics & Math
4
0
60 people solved
Oct 13, 2025
Hard
Data ScientistChoose tests and solve distribution parameters
Engagement Comparison: New vs Existing Users (2025-08-05 → 2025-09-01) Context: You have per-user daily session counts (integer, skewed, many zeros) f...
Statistics & Math
5
0
59 people solved
Oct 13, 2025
Medium
Data ScientistDesign metrics and write SQL for a case
Case: Measure the impact of outreach on subsequent purchases and diagnose anomalies. Define your primary metric and write SQL. Schema and tiny samples...
Data Manipulation (SQL/Python)
0
0
5 people solved
Oct 13, 2025
Medium
Data ScientistNavigate an ambiguous take-home assessment
Behavioral Case: Executing a 4–6 Hour Take‑Home Data Science Assignment Context You are a candidate for a Data Scientist role. You receive a one‑week ...
Behavioral & Leadership
3
0
31 people solved
Oct 13, 2025
Medium
Data ScientistDerive expectation for two consecutive heads
Waiting Time Until First HH (Two Consecutive Heads) Setup Let T be the number of coin flips required until the pattern HH (two consecutive heads) appe...
Statistics & Math
7
0
90 people solved
Oct 13, 2025
Medium
Data ScientistRedesign an executive dashboard for C-suite
Redesign a Spaghetti Chart into an Executive Dashboard Context You are handed a single slide for the C‑suite that shows a spaghetti chart of regional ...
Analytics & Experimentation
2
0
38 people solved
Oct 13, 2025
Hard
Data ScientistJustify EU B2B Chat Product Strategy
Executive Brief Task: EU B2C Customer-Service Chat (Subscription) Context You are asked to prepare a one-page executive brief recommending whether to ...
Behavioral & Leadership
4
0
49 people solved
Oct 13, 2025
Hard
Data ScientistExplain and tune XGBoost; prevent overfitting
XGBoost Tree Booster: Objective, Hyperparameters, Tuning for Imbalanced Detection, and Post-training Use Context: You are building a binary classifier...
Machine Learning
4
0
66 people solved
Oct 13, 2025
Medium
Data ScientistCompute 7-day rolling complaint/order ratio in SQL
SQL only. Given the schema and sample data below, write a single Postgres query (no procedural code) to compute a 7-day rolling complaint-to-order rat...
Data Manipulation (SQL/Python)
1
0
15 people solved
Oct 13, 2025
Hard
Data Scientist LockedDesign a restaurant recommender under constraints
This question evaluates a candidate's competency in designing scalable machine learning recommender systems, covering retrieval and ranking architectu...
Machine Learning
4
0
44 people solved
Oct 13, 2025
Hard
Data ScientistChoose robust metrics for skewed comments
Robust central tendency and inference for zero‑inflated, heavy‑tailed counts You are evaluating an A/B test on per‑user daily comment counts. The outc...
Statistics & Math
10
2
76 people solved
Oct 13, 2025
Hard
Data ScientistDesign a Cold-Start-Aware Recommender
System Design: Two-Stage Recommender for a New Content App Context You are designing recommendations for a new content app with sparse interactions an...
Machine Learning
3
0
49 people solved
Oct 13, 2025