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 ScientistInternRelate coefficients under linear feature transformation
Suppose you are fitting a linear regression model and you consider two different feature parameterizations. Original features: x1, x2. Transformed fea...
Statistics & Math
7
0
56 people solved
Oct 14, 2025
Medium
Data ScientistPropose an ads recommendation model for shop ads
You need to propose a modeling approach for recommending/ranking shop ads (i.e., which shop ads to show and in what order) for a marketplace app. Desc...
Machine Learning
5
0
44 people solved
Oct 14, 2025
Medium
Software EngineerAnswer product, collaboration, and prioritization scenarios
Behavioral / Leadership prompts Answer the following (you can assume a 35–40 minute behavioral interview): 1. Intro (5 minutes): Walk through your bac...
Behavioral & Leadership
3
0
47 people solved
Oct 14, 2025
Medium
Software EngineerHow do you handle credit, leadership, and feedback?
Behavioral interview prompts Answer the following prompts with concrete examples from your experience (use a structured method such as STAR: Situation...
Behavioral & Leadership
9
0
76 people solved
Oct 14, 2025
Medium
Software EngineerBuild a time-based key-value store
Problem Design a data structure that stores multiple values for the same key at different timestamps, and can retrieve the most recent value as of a g...
Coding & Algorithms
7
0
71 people solved
Oct 14, 2025
Medium
Software EngineerImplement a Tic-Tac-Toe game class
Problem Implement a class that supports playing an n × n Tic-Tac-Toe game. Requirements Create a class TicTacToe(n) with: - move(row, col, player) -> ...
Coding & Algorithms
6
0
69 people solved
Oct 14, 2025
Medium
Data ScientistRemove shortest subarray to sort array
Given an integer array nums (length up to 2×10^5), return the shortest subarray [L,R] you can remove so that the remaining elements form a non‑decreas...
Coding & Algorithms
5
0
67 people solved
Oct 13, 2025
Hard
Data Scientist LockedDerive and regularize logistic regression
This question evaluates proficiency in logistic regression theory and regularization, GLM versus OLS assumptions, class imbalance handling and calibra...
Machine Learning
3
0
27 people solved
Oct 13, 2025
Hard
Data Scientist LockedDesign and validate an ads feed experiment
This question evaluates a data scientist's competency in experiment design, causal inference, and applied statistical analysis for product experimenta...
Analytics & Experimentation
9
0
74 people solved
Oct 13, 2025
Hard
Data Scientist LockedValidate in-post restaurant recommendations via experiment
This question evaluates a data scientist's competency in experimental design for recommendation systems, including defining viewer- and creator-level ...
Analytics & Experimentation
1
0
24 people solved
Oct 13, 2025
Medium
Data ScientistWrite SQL to compute campaign net revenue
Using the schema and sample data below, write SQL to produce, for each campaign_id and segment, the following metrics for August 2025: total_reached, ...
Data Manipulation (SQL/Python)
17
0
124 people solved
Oct 13, 2025
Medium
Data ScientistCompute gala vs online break-even donors
A nonprofit must choose one of two fundraising options. Option A (Gala): capacity 100 attendees; fixed cost $20,000; variable cost $100 per attendee. ...
Statistics & Math
8
0
66 people solved
Oct 13, 2025
Medium
Data ScientistDissect a failure and corrective actions
Describe a recent failure. Explain: a) root causes (your decisions vs. external factors) using a 5 Whys or fault-tree; b) early warning signals you mi...
Behavioral & Leadership
5
0
42 people solved
Oct 13, 2025
Medium
Data Scientist LockedEstimate Portal’s causal lift on video-call usage
This question evaluates applied causal inference and statistical analysis skills, including defining estimands, designing staggered-adoption differenc...
Statistics & Math
6
0
48 people solved
Oct 13, 2025
Medium
Data ScientistBuild a model to infer home vs office vs public
You must infer whether a Facebook session’s network context is home, office, or public venue to inform Portal targeting. Constraints: IPs may be share...
Machine Learning
2
0
44 people solved
Oct 13, 2025
Medium
Data ScientistChoose threshold under asymmetric costs
You own a credit-card fraud classifier deployed as a probability scorer. Choose an operating threshold under asymmetric costs and justify it quantitat...
Machine Learning
6
0
58 people solved
Oct 13, 2025
Medium
Data ScientistWrite SQL/pandas for KPI anomaly
Write SQL (and outline equivalent pandas) for a KPI anomaly investigation. Assume today = '2025-09-01'. Schema: Users(user_id INT, country TEXT, signu...
Data Manipulation (SQL/Python)
9
0
80 people solved
Oct 13, 2025
Medium
Data ScientistSet membership fee under investment constraints
Streaming membership pricing vs. content investment Context You are designing a monthly membership for a streaming service. Producing original shows i...
Statistics & Math
4
0
69 people solved
Oct 13, 2025
Easy
Data ScientistCompute monthly break-even subscribers
Break-even Analysis for a Subscription Streaming Service Context A streaming startup incurs monthly fixed costs and per-subscriber variable costs and ...
Statistics & Math
10
0
73 people solved
Oct 13, 2025
Medium
Data ScientistDeliver self-intro and justify move and company fit
Behavioral Prompt: Self‑Introduction, Why Capital One, and Job‑Change Rationale Context You are interviewing for a Data Scientist role during an HR sc...
Behavioral & Leadership
3
0
44 people solved
Oct 13, 2025