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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
Apple logo
Apple
Medium
Software EngineerIntern

Explain SystemVerilog verification concepts and write constraints

Answer the following SystemVerilog / DV questions. Use short explanations and, where appropriate, show small SV code snippets. 1) Concurrency: Explain...

Software Engineering FundamentalsProgramming LanguagesConcurrency
10
0
174 people solved
Feb 9, 2026
Intuit logo
Intuit
Hard
Data Scientist

Choose the right test for proportions

A/B Test on Delivery Completion Rate (Binary Outcome) Context: You are evaluating an A/B test on a binary metric (delivered_bool). Treat each order as...

Statistics & MathHypothesis TestingProbability
49
0
421 people solved
Oct 13, 2025
Google logo
Google
Hard
Machine Learning Engineer

Compute winning probability on 1D dice walk

You are on an infinite 1D number line starting at position 0. Repeatedly roll a fair die that returns an integer uniformly at random from 1 to K (incl...

Coding & AlgorithmsDynamic ProgrammingProbability
28
1
263 people solved
Mar 2, 2026
Google logo
Google
Hard
Data Scientist Locked

Explain Bootstrap and Statistical Inference

This question evaluates a data scientist's competence with resampling methods (bootstrap), uncertainty quantification and hypothesis testing (variance...

Statistics & MathSampling & EstimationHypothesis Testing
57
0
392 people solved
Dec 29, 2025
Capital One logo
Capital One
Medium
Data Scientist

Determine Claim Rate for Breakeven in Insurance Portfolio

Weather-Insurance Portfolio Profitability You price a 12-month weather insurance policy. Customers pay premiums upfront for the year. Each policy can ...

Statistics & MathBusiness Case AnalysisProbability
90
0
275 people solved
Jul 12, 2025
Squarepoint logo
Squarepoint
Medium
Quantitative Trader Locked

Solve Probability and Statistics Questions

This question evaluates proficiency in statistical modeling (ordinary least squares linear regression), probability theory (law of large numbers and c...

Machine LearningRegression & Statistical ModelingProbability
10
0
128 people solved
May 3, 2026
Mercor logo
Mercor
Medium
Software Engineer

Sorting Complexity: Beating O(n^2), Quicksort's Worst Case, and a Slower Sort

This is a verbal discussion about sorting, and no code is written. The interviewer starts from the observation that a straightforward insertion sort t...

Software Engineering FundamentalsSortingMath & Number Theory
9
0
71 people solved
May 1, 2026
Cohere logo
Cohere
Medium
Machine Learning Engineer Locked

Explain Top-k and Top-p Decoding

This question evaluates understanding of autoregressive decoding strategies in probabilistic language models, assessing competency in reasoning about ...

Machine LearningLLM Inference & Serving
11
0
118 people solved
May 23, 2026
Jane Street logo
Jane Street
Easy
Software Engineer

Calculate dice game win probability

Calculate dice game win probability Dice Game With Tie Rerolls: Probability You Eventually Win Context - Three players each roll a fair standard 6-sid...

Statistics & MathProbabilityPuzzles & Brainteasers
45
1
617 people solved
Aug 4, 2025
Capital One logo
Capital One
Easy
Data Scientist Locked

How would you decide to cancel a TV show?

This question evaluates a data scientist's competencies in business analytics and strategic decision-making, including financial and valuation reasoni...

Analytics & ExperimentationBusiness Case AnalysisProduct Strategy
9
0
140 people solved
Feb 12, 2026
Jane Street logo
Jane Street
Medium
Quantitative ResearcherIntern

Which Dice Game Wins More Often: One Six in 4 Rolls, or Double Sixes in 24 Rolls?

You are offered two dice games and asked to decide which one gives you a better chance of winning. - Game 1: Roll one fair six-sided die 4 times. You ...

Software Engineering FundamentalsProbabilityPuzzles & Brainteasers
20
1
158 people solved
Aug 28, 2025
Waymo logo
Waymo
Easy
Data Scientist Locked

Model wins-until-failure and expected future wins

This question evaluates probabilistic modeling and statistical inference skills for censored time-to-event performance data, focusing on estimating pl...

Statistics & MathProbabilitySampling & Estimation
23
0
261 people solved
Jan 17, 2026
Google logo
Google
Medium
Data Scientist

Derive MLEs and conditional Normal distributions

Normal and Bivariate Normal: PDFs/CDFs, MLEs, Conditioning, and Unbiased Variance Setup - Let X1, …, Xn be i.i.d. Normal(μ, σ²). - Independently, let ...

Statistics & MathSampling & EstimationProbability
12
0
153 people solved
Oct 13, 2025
Meta logo
Meta
Medium
Data Scientist Locked

Fake Accounts [AE]

Evaluates probability, classification metrics, and feature engineering for fake-account detection. Strong answers apply Bayes' rule with rate-weighted...

Statistics & MathProbabilityFeature Engineering
227
6
571 people solved
Jul 12, 2025
Apple logo
Apple
Medium
Data Scientist

Compare Normal vs Poisson; test dispersion and approximate tails

You collect n=200 independent minute-level event counts with sample mean x̄=14.5 and sample variance s²=16.2. 1) Under a Poisson(λ) model, derive the ...

Statistics & MathHypothesis TestingSampling & Estimation
10
0
115 people solved
Oct 13, 2025
Optiver logo
Optiver
Hard
Quantitative Trader

Optimize interval-scoring strategy

Optimize interval-scoring strategy Five-Round Interval-Estimation Game: Optimal Intervals and Risk Allocation You play five independent rounds. In rou...

Statistics & MathProbabilityDynamic Programming
27
0
254 people solved
Aug 7, 2025
Upstart logo
Upstart
Easy
Data Scientist

Compute decay, OLS, and classic probability results

You are asked several probability/statistics questions. 1) Radioactive decay (half-life) A radioactive atom has a half-life of 1 day. Assume each atom...

Statistics & MathProbabilityRegression & Statistical Modeling
16
0
253 people solved
Dec 9, 2025
OpenAI logo
OpenAI
Medium
Machine Learning Engineer

Maintain Entropy for a Streaming Distribution

A stream emits categorical observations one at a time. After each observation, report the empirical Shannon entropy of all observations seen so far: H...

Statistics & MathProbability
24
0
190 people solved
Aug 23, 2025
Jane Street logo
Jane Street
Easy
Quantitative TraderIntern

Four Fair Coins: Expected Payoff and Pricing Two Magic Wands

You play the following game: four fair coins are tossed at the same time. For every coin that lands heads, you are paid \$1. The interviewer walks you...

Machine LearningProbabilityPuzzles & Brainteasers
13
1
167 people solved
Sep 11, 2025
LinkedIn logo
LinkedIn
Medium
Data Scientist Locked

Derive mean and variance of x̄

This question evaluates understanding of expectation, variance, covariance structure, and how dependence between observations affects the precision of...

Statistics & MathSampling & EstimationProbability
7
0
112 people solved
Feb 19, 2026
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