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
Medium
Data ScientistExplain p-value and choose correct test
Technical Screen: P-values and Robust Two-Sample/Paired Tests Context: You are a data scientist evaluating healthcare interventions. Answer in clear, ...
Statistics & Math
4
0
65 people solved
Oct 13, 2025
Hard
Data ScientistExplain your ML project end-to-end
End-to-End ML Project Deep Dive (7 Parts) Assume you are describing the most complex ML project on your resume. Answer each part precisely and concret...
Machine Learning
6
0
72 people solved
Oct 13, 2025
Hard
Data ScientistImprove low R² without p‑hacking
Predicting Contribution per Order with Low R² Context You are modeling contribution per order (a continuous per-order outcome such as margin or profit...
Machine Learning
9
0
82 people solved
Oct 13, 2025
Hard
Data ScientistAnalyze A/B test with revenue–cost tradeoffs
A/B Test: Same‑Day Delivery Checkout Change You are evaluating a checkout UI change that promotes same‑day delivery. The experiment is a standard two‑...
Analytics & Experimentation
14
0
105 people solved
Oct 13, 2025
Medium
Data ScientistDemonstrate leadership in cross-functional disagreement
Behavioral & Leadership (HR Screen, Data Scientist) Prompt Describe a time you disagreed with a partner team (e.g., product pushing for more aggressiv...
Behavioral & Leadership
2
0
29 people solved
Oct 13, 2025
Medium
Data ScientistSolve stock, BFS path, and merge intervals
Solve three coding problems; justify complexity and corner cases. A) Best Time to Buy/Sell Stock (one transaction): Given prices[0..n-1] (integers), r...
Coding & Algorithms
4
0
37 people solved
Oct 13, 2025
Medium
Data ScientistTransform retail data with pandas groupby/merge/concat
Using pandas only (groupby/agg/merge/concat; no for-loops), write code to answer the sub-questions below on the following small dataframes. Assume tim...
Data Manipulation (SQL/Python)
0
0
3 people solved
Oct 13, 2025
Hard
Data ScientistExplain complex tech to non-technical stakeholder
Behavioral: Explain a Complex Modeling Decision to a Non‑Technical Sales Leader You are asked to explain a complex modeling decision from a résumé pro...
Behavioral & Leadership
1
0
25 people solved
Oct 13, 2025
Medium
Data ScientistDesign airport dispatch with ETA uncertainty
You control airport pickups with streaming ETAs for arriving flights and live driver locations/queues. Design an online dispatch algorithm that minimi...
Coding & Algorithms
15
0
105 people solved
Oct 13, 2025
Hard
Data ScientistDesign a profit growth strategy
Ride-share Profit Plan (Next Quarter) Context You are the data scientist for a ride-share marketplace (two-sided: riders and drivers). Your goal is to...
Analytics & Experimentation
3
0
36 people solved
Oct 13, 2025
Medium
Data ScientistDecide under adverse signals and conflicts
Scenario: Pre-Launch Decision Under Mixed Signals You are preparing to launch a new messaging/notifications feature. Leading indicators are mixed: som...
Behavioral & Leadership
4
0
45 people solved
Oct 13, 2025
Hard
Data ScientistDefine metrics and design experiments for notifications
Analytics/Experimentation Case: "Your friend is attending a local event—join them?" You are evaluating a proposed notification: "Your friend is attend...
Analytics & Experimentation
4
0
32 people solved
Oct 13, 2025
Hard
Data ScientistIncrease posts receiving comments via experimentation
Increase the Share of Posts That Receive a Meaningful Comment You are a data scientist for a consumer social app with posts and comments. Your goal is...
Analytics & Experimentation
5
0
35 people solved
Oct 13, 2025
Hard
Data ScientistBrainstorm how to optimize email engagement
Lifecycle Email: Increase Incremental On‑Site Engagement You own lifecycle email for a large consumer app and are tasked with increasing on‑site engag...
Analytics & Experimentation
3
0
52 people solved
Oct 13, 2025
Hard
Data ScientistDeliver an elevator pitch and impact example
Elevator Pitch + End-to-End Experimentation Case + “Why Meta?” Context You are interviewing for a Data Scientist role during a technical screen. Use c...
Behavioral & Leadership
4
0
35 people solved
Oct 13, 2025
Hard
Data ScientistDesign a battery-life predictor and cold-start strategy
Smartphone Time-to-Empty (TTE) Prediction — Baseline, Features, Cold Start, Evaluation, and Monitoring Context You are building a per-device predictor...
Machine Learning
19
0
235 people solved
Oct 13, 2025
Hard
Data Scientist LockedDiagnose drop and assess metric change impact
This question evaluates a data scientist's competency in diagnostic analytics, instrumentation validation, causal attribution, experimentation design,...
Analytics & Experimentation
1
0
25 people solved
Oct 13, 2025
Medium
Data Scientist LockedModel overdispersed counts; estimate treatment lift
This question evaluates modeling and inference for overdispersed, zero‑inflated count data, including estimation of treatment lift (rate ratios), disp...
Statistics & Math
4
0
42 people solved
Oct 13, 2025
Medium
Data ScientistWrite SQL for geo posting-frequency drops
Using the schema below, write a single ANSI SQL query (window functions allowed) that identifies countries with the largest share of creators whose po...
Data Manipulation (SQL/Python)
11
0
91 people solved
Oct 13, 2025
Medium
Data ScientistAnalyze DAU comments distribution and resampling
Consider the metric comments_per_DAU (number of comments a daily active user makes in a day). a) Shape: Describe and justify the expected distribution...
Statistics & Math
8
1
73 people solved
Oct 13, 2025