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Tech Interview Questions

Practice the exact questions companies are asking right now.

Questions
357
Companies
980
Updated
11.10.2026
357 Questions 980 Companies11.10.2026
PLTCHK testimonial
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_ testimonial
_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"

Chris testimonial
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 testimonial
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."

Jake testimonial
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 testimonial
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."

Carlos testimonial
CarlosFull Stack, Shopify

"The solution quality is insane. It covers approach, edge cases, time complexity, follow-ups. Nothing else comes close."

boba.tea.vibes testimonial
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."

Andy testimonial
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 testimonial
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."

Shruti testimonial
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 testimonial
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."

Bianca testimonial
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 testimonial
tambrahm007

"I recently cleared Uber interviews (strong hire in the design round) and all the questions were present in prachub."

toa testimonial
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."

PLTCHK testimonial
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_ testimonial
_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"

Chris testimonial
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 testimonial
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."

Jake testimonial
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 testimonial
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."

Carlos testimonial
CarlosFull Stack, Shopify

"The solution quality is insane. It covers approach, edge cases, time complexity, follow-ups. Nothing else comes close."

boba.tea.vibes testimonial
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."

Andy testimonial
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 testimonial
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."

Shruti testimonial
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 testimonial
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."

Bianca testimonial
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 testimonial
tambrahm007

"I recently cleared Uber interviews (strong hire in the design round) and all the questions were present in prachub."

toa testimonial
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
Point72 logo
Point72
Hard
Data Scientist

Price a coin-doubling game rationally

Coin-Doubling (St. Petersburg) Game: EV, Log-Utility Pricing, Kelly Staking, and House Cap Context and assumptions - Single play: You buy one ticket t...

Statistics & MathProbabilityPuzzles & Brainteasers
9
0
117 people solved
Oct 13, 2025
Roblox logo
Roblox
Hard
Data Scientist

Implement robust one/two-sided p-value function

Implement p_value(stat, alternative, dist, df=None) Context: You're building a small, production-quality helper to compute p-values for common one- an...

Statistics & MathHypothesis TestingProbability
10
0
154 people solved
Oct 13, 2025
Microsoft logo
Microsoft
Medium
Product Manager

Department vs University-Wide Admission Rates by Gender: Can They Disagree?

At a university, every department admits female-identifying applicants at a higher rate than all other applicants. Could the university-wide acceptanc...

Analytics & ExperimentationCausal Inference
0
0
4 people solved
Jun 29, 2025
Coinbase logo
Coinbase
Easy
Data Scientist

Calculate Expected Users Linking Coinbase Wallets

Expected Coinbase Wallet Linking When users sign up for Coinbase, each of the n users is independently prompted to link a crypto wallet. Each user lin...

Statistics & MathProbability
15
0
118 people solved
Jul 12, 2025
Meta logo
Meta
Medium
Data Scientist

Compute fraud probabilities with Bayes and Binomial

Fake-Account Detection with Binomial Sessions and Bayes Updating You are evaluating a rules-based detector for fake accounts on an online platform. Ea...

Statistics & MathProbability
12
2
106 people solved
Oct 13, 2025
Google logo
Google
Easy
Data ScientistSenior+

Explain mixed models and fixed vs random effects

In an applied DS setting, you are modeling an outcome (e.g., watch time per session, conversion, or rating) across multiple entities (e.g., users, cre...

Statistics & MathRegression & Statistical Modeling
18
0
131 people solved
Oct 13, 2025
Liftoff logo
Liftoff
Hard
Machine Learning Engineer

Probability That the Sum of 1,000 Fair Die Rolls Exceeds a Threshold

A fair six-sided die is rolled 1,000 times, and the rolls are independent. Let $S$ be the sum of the 1,000 faces. Estimate the probability that $S$ ex...

Statistics & MathProbability
2
0
20 people solved
Jul 6, 2026
Meta logo
Meta
Medium
Data Scientist

Analyze User Comment Distribution and Sampling Effects

Analyze User Comment Distribution and Sampling Effects You are analyzing daily comment counts per user. The individual user-level distribution is righ...

Statistics & MathProbabilitySampling & Estimation
118
3
394 people solved
Jul 12, 2025
Citibank logo
Citibank
Medium
Data Scientist

Price options and bonds via binomial no-arbitrage

Binomial No-Arbitrage Pricing: Options and Bonds Setup and Assumptions - Two-period models; per-period simple compounding. - Discount per period: (1 +...

Statistics & MathProbability
13
0
153 people solved
Oct 13, 2025
Optiver logo
Optiver
Medium
Data Scientist

Compute expected counters after color elimination

Compute expected counters after color elimination Problem You have a bag with 30 counters: 10 red, 10 yellow, and 10 blue. You draw counters uniformly...

Statistics & MathProbabilityPuzzles & Brainteasers
6
0
115 people solved
Jul 17, 2025
Google logo
Google
Medium
Product Manager

Average vs Median Google Search Latency: Reasoning About a Skewed Distribution

Consider the response time of searches on Google: how long it takes from the moment a query is submitted until its results come back. Looking across a...

Statistics & MathProbability
0
0
8 people solved
Jan 23, 2025
Google logo
Google
Hard
Data Scientist Locked

Model Soccer Shot Conversion

This question evaluates probabilistic predictive modeling, spatial-temporal feature engineering, model calibration and evaluation, and identification ...

Machine LearningSupervised LearningFeature Engineering
12
0
167 people solved
Dec 29, 2025
Meta logo
Meta
Medium
Data Scientist

Evaluate Instagram's Short-Video Recommender System Success

Evaluate Instagram's Short-Video Recommender System Success Instagram is launching a short-video recommender feed. You are asked to choose metrics, re...

Analytics & ExperimentationMetrics & KPIsExperiment Design (A/B Testing)
113
0
445 people solved
Jul 12, 2025
Unity logo
Unity
Medium
Product Manager

Statistical Significance Without Jargon: An Accurate Everyday Account of P-Values

You are interviewing for a product manager role and are asked to explain a p-value to someone who has never worked with data. The interviewer suggests...

Analytics & ExperimentationHypothesis TestingCommunication & Stakeholders
0
0
6 people solved
Nov 19, 2024
Meta logo
Meta
Medium
Product Manager

Sizing How Many Facebook Groups Exist from a 2.6-Billion-User Base

In a product manager interview you are told that Facebook has roughly 2.6 billion users and that every one of them belongs to at least one group. Star...

Product / Decision MakingEstimation & Market Sizing
0
0
5 people solved
Jan 16, 2025
Bnp logo
Bnp
Easy
Data Scientist

Compute expected max/min of n die rolls

You roll a fair six-sided die n times independently. 1) Compute the expected value of the maximum roll. 2) Compute the expected value of the minimum r...

Software Engineering FundamentalsProbability
6
0
85 people solved
Jan 5, 2026
TikTok logo
TikTok
Medium
Product Manager

Estimating Average Reciprocal Follow Connections per TikTok User

Estimate how many mutual follows the average TikTok user has, where a mutual follow is a pair of accounts that follow each other. Walk through your as...

Product / Decision MakingEstimation & Market Sizing
0
0
5 people solved
Jul 31, 2025
Google logo
Google
Medium
Data Scientist

Explain Simpson’s Paradox and Its Causes with Example

Simpson's Paradox: Definition, Cause, and Example Demonstrate your understanding of Simpson's paradox in a statistics or analytics interview. Define t...

Statistics & MathCausal InferenceProbability
18
0
140 people solved
Jul 12, 2025
Optiver logo
Optiver
Hard
Quantitative Trader

Make a Market on the Sum of Private and Community Cards

In a second one-hour online market-making round, which the report says relies more on fluency with market-making concepts than the first, players trad...

Statistics & MathProbabilityPuzzles & Brainteasers
0
0
2 people solved
Nov 13, 2025
Snapchat logo
Snapchat
Easy
Data Scientist

Calculate Posterior Probability Using Bayes' Theorem Example

Bayes' Theorem: Spam-Flag Posterior You are evaluating a simple classifier that flags messages as spam. From historical data you know the spam prevale...

Statistics & MathBayesian StatisticsModel Evaluation
40
0
184 people solved
Jul 12, 2025
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