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 ScientistAnalyze overfitting, DenseNet, preprocessing, and cross-validation
Image Classification in Healthcare: End-to-End Interview Task Context: You are designing and evaluating an image-classification system for a healthcar...
Machine Learning
10
0
73 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
5 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
4
0
33 people solved
Oct 13, 2025
Hard
Data Scientist LockedDefine scalable train/validation for churn
This question evaluates a data scientist's competency in designing scalable, leakage-safe training, validation, evaluation, and serving pipelines for ...
Machine Learning
4
0
45 people solved
Oct 13, 2025
Hard
Data Scientist LockedChoose tests for rare-event A/B analysis
This question evaluates expertise in statistical experiment design for rare binary outcomes, covering hypothesis test selection for low-event-rate pro...
Statistics & Math
2
0
29 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
26 people solved
Oct 13, 2025
Hard
Data Scientist LockedDesign and analyze email deliverability experiment
This question evaluates a data scientist's competency in experimental design, causal inference, sequential testing (frequentist and Bayesian), instrum...
Analytics & Experimentation
7
1
72 people solved
Oct 13, 2025
Easy
Data ScientistDerive logistic regression objective and gradients
Context: Binary Logistic Regression You are given a binary classification dataset {(x_i, y_i)}_{i=1}^m with labels y_i ∈ {0, 1}. The model uses the si...
Machine Learning
4
0
89 people solved
Oct 13, 2025
Medium
Data ScientistExplain p‑values to a product manager
Interpreting a Two-Sided A/B Test p-value of 0.03 You ran a two-sided A/B test on conversion rate. Results: - Baseline (control) conversion: 5.0% - Ob...
Statistics & Math
3
0
54 people solved
Oct 13, 2025
Hard
Data ScientistMeasure Super Bowl ad impact with causal design
Super Bowl National TV Ad: Incrementality Measurement Plan Context: Your consumer app ran a single 30-second national Super Bowl TV spot. Design a pla...
Analytics & Experimentation
8
0
58 people solved
Oct 13, 2025
Medium
Data ScientistNegotiate Figma compensation analytically
Analyze and Negotiate a Figma Data Scientist Offer Background You have a recruiter-indicated package for a Data Scientist role: - Base salary: $210–22...
Behavioral & Leadership
11
0
97 people solved
Oct 13, 2025
Medium
Data ScientistMerge words by head-tail chaining
Given a list of lowercase words, merge them into a single string by repeatedly chaining words where the last character of the current string equals th...
Coding & Algorithms
5
0
44 people solved
Oct 13, 2025
Medium
Data ScientistDiagnose DAU drop with SQL by country
Write a single SQL query to diagnose a country-level DAU drop for an email product. Assume today is 2025-09-01. DAU is the count of distinct user_id w...
Data Manipulation (SQL/Python)
0
0
6 people solved
Oct 13, 2025
Hard
Data ScientistReflect on a challenging project you led
Behavioral Prompt: Leading an End-to-End Project That Changed a Product Decision Context: You are a Data Scientist interviewing for a consumer tech pr...
Behavioral & Leadership
2
0
39 people solved
Oct 13, 2025
Medium
Data ScientistFind common friends from directed edges
You have a directed edge list that records who followed whom. A mutual “friendship” exists only if both directions appear (A→B and B→A). Schema and sa...
Data Manipulation (SQL/Python)
12
0
81 people solved
Oct 13, 2025
Hard
Data ScientistDesign and power a frequency-cap experiment
Experiment Design: Raising a 7‑Day Frequency Cap from 3→4 Impressions Context A large video ad campaign plans to raise the per‑user rolling 7‑day freq...
Analytics & Experimentation
17
0
119 people solved
Oct 13, 2025
Medium
Software EngineerNew GradDesign Tic-Tac-Toe With K Players
Design and implement a Tic-Tac-Toe game engine. You are given: - k players, each with a unique player ID or mark. - An n x n board, initially empty. -...
Coding & Algorithms
3
0
21 people solved
Feb 12, 2026
Easy
Data ScientistInternDesign and Test a New Feature
You are interviewing for a Data Scientist internship at Uber. Assume the Uber rider app already includes standard functionality such as booking a ride...
Analytics & Experimentation
20
0
139 people solved
Feb 12, 2026
Medium
Software EngineerCheck if a word exists in a grid
Given an m×n grid of characters and a string word, determine whether the word can be formed by sequentially adjacent cells (adjacent means horizontall...
Coding & Algorithms
4
0
57 people solved
Feb 12, 2026
Medium
Software Engineer LockedRemove nodes with a given value
This question evaluates proficiency in singly linked list manipulation, specifically pointer handling and in-place node removal, and falls under the C...
Coding & Algorithms
18
0
177 people solved
Feb 12, 2026