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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 17 results
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
Meta logo
Meta
Medium
Data Scientist Locked

Estimate bots and CI from DAU spike

This question evaluates proficiency in mixture modeling for anomaly detection, parametric and nonparametric inference for mean differences, handling o...

Statistics & MathProbabilitySampling & Estimation
10
1
111 people solved
Oct 13, 2025
Point72 logo
Point72
Medium
Quantitative Researcher

Formulate a Single-Period Stat-Arb Objective

Formulate a Single-Period Stat-Arb Objective Formulate the objective for a single-period statistical-arbitrage portfolio that chooses target holdings ...

Statistics & MathPortfolio Construction & Alpha Research
1
0
27 people solved
Jun 7, 2025
Meta logo
Meta
Medium
Product Manager

Instagram Stories: Set a Goal, Define Success Metrics and Pick a User Group to Grow

You are the product manager for Instagram Stories. What goal would you set for Stories, and how would you measure whether it is succeeding? Once you h...

Analytics & ExperimentationMetrics & KPIsSegmentation & Cohort Analysis
0
0
3 people solved
May 22, 2024
Point72 logo
Point72
Medium
Quantitative Researcher

Derive Annualized Portfolio Volatility

Derive Annualized Portfolio Volatility A stock portfolio has weight vector w. Each stock has factor exposures, the factors have a covariance matrix, a...

Statistics & MathPortfolio Construction & Alpha Research
3
0
29 people solved
Jun 7, 2025
LinkedIn logo
LinkedIn
Medium
Data Scientist

Single Queue vs Multiple Queues — Service Design

Bank Branch Queue Design: Single Queue Versus Multiple Queues A bank branch has c identical tellers. Customers arrive approximately as a Poisson proce...

Analytics & ExperimentationProbabilityOperations & Capacity
23
0
101 people solved
Jul 12, 2025
Google logo
Google
Medium
Data Scientist Locked

Infer distribution and choose robust statistics

Infer what distribution generated 10,000 session revenues from summary statistics alone, then choose a transformation, a median interval, an A/B test,...

Statistics & MathProbabilityHypothesis Testing
12
0
127 people solved
Oct 13, 2025
Medium
Data Scientist

Write SQL to analyze response accuracy and speed

You are given response-level data for an online assessment with sections verbal/design/analytics and verbal subtypes grammar/vocab/tense/other. Using ...

Data Manipulation (SQL/Python)SQLMetrics & KPIs
3
0
61 people solved
Oct 13, 2025
Google logo
Google
Medium
Product Manager

Estimate the Expected Stop Time for Someone Passing Through a Road Junction

An interviewer asks you how long the average person waits at an intersection. Decide exactly what you are estimating, build the estimate from clearly ...

Product / Decision MakingEstimation & Market SizingProbability
0
0
6 people solved
Apr 11, 2025
Meta logo
Meta
Medium
Data Scientist

Compare Bayesian and frequentist decisions

A/B Test With Beta–Binomial Posteriors and Decision-Making Under Asymmetric Costs You ran a two-arm A/B test on a binary KPI with independent Beta(1, ...

Statistics & MathBayesian StatisticsExperiment Analysis & Readout
11
0
150 people solved
Oct 13, 2025
OneMain Financial logo
OneMain Financial
Medium
Data Scientist Locked

Maximize credit card portfolio profit

This question evaluates competence in credit-risk quantification, portfolio profitability analysis, approval decisioning and experiment design for a D...

Analytics & ExperimentationBusiness Case AnalysisProbability
12
0
127 people solved
Oct 13, 2025
Boston Consulting Group logo
Boston Consulting Group
Easy
Data Scientist

Calculate Probability of Heads and Red Balls Drawing

Calculate Probability of Heads and Red Balls Drawing Quick-Fire Probability (CodeSignal-style) Context: Answer the following independent probability q...

Statistics & MathProbability
10
0
117 people solved
Aug 4, 2025
Optiver logo
Optiver
Medium
Data Scientist

Compute expected coin flips to meet on octagon

Compute expected coin flips to meet on octagon Meeting Time on a Random Walk Around an Octagon Problem Two independent particles start at opposite ver...

Statistics & MathPuzzles & BrainteasersProbability
8
0
136 people solved
Jul 17, 2025
Meta logo
Meta
Easy
Data Scientist

Calculate Posterior Fraud Probability Using Bayes' Theorem

Calculate Posterior Fraud Probability Using Bayes' Theorem Posterior Fraud Probability After a Flag Context You operate a fraud detection system that ...

Statistics & MathProbability
23
0
122 people solved
Aug 4, 2025
Citadel logo
Citadel
Hard
Data Scientist

Analyze profits under random walk and Brownian motion

Analyze profits under random walk and Brownian motion Random-Walk Trading Rules: Expectation and Variance Setup - Let (S_t) be a simple random walk fo...

Statistics & MathProbability
15
0
147 people solved
Aug 1, 2025
Gopuff logo
Gopuff
Easy
Machine Learning Engineer

Explain SHAP, Word2vec, Random Forests, Normalization, and Transformers

Explain the following machine learning fundamentals. Use definitions, mechanisms, and small conceptual examples; no dataset or company-specific applic...

Machine LearningML FundamentalsModel Interpretability
1
0
23 people solved
Mar 18, 2024
Meta logo
Meta
Medium
Data Scientist Locked

Determine Probability of Shared Videos in Recommendations

Meta statistics and product prompt on video recommendation overlap, covering combinations, probability of shared videos, expected intersection size, s...

Statistics & MathProbabilityRecommendation Systems
59
0
131 people solved
Jul 12, 2025
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