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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
Google logo
Google
Medium
Software Engineer Locked

Choose optimal guesses for green-only Wordle

This question evaluates probabilistic reasoning, expected-value optimization, information partitioning, and algorithmic efficiency in selecting guesse...

Coding & AlgorithmsMath & Number TheoryProbability
15
1
179 people solved
Oct 14, 2025
Experian logo
Experian
Easy
Data Scientist

Calculate Expected Flips for Two Heads Coin Toss

Calculate Expected Flips for Two Heads Coin Toss Scenario Experian DataLabs online assessment – core probability section. Several short probability pr...

Statistics & MathProbabilityPuzzles & Brainteasers
11
0
141 people solved
Aug 4, 2025
Upstart logo
Upstart
Medium
Data Scientist

Solve core probability/statistics mini-problems

Answer the following probability/statistics interview questions. Assume all randomness is independent unless stated otherwise. 1) Radioactive decay (h...

Statistics & MathProbabilityPuzzles & Brainteasers
20
0
140 people solved
Nov 29, 2025
Apple logo
Apple
Medium
Machine Learning Engineer

Analyze vision model failures

For a computer vision product, discuss the following: 1. Explain the core machine learning fundamentals that matter most in vision work, including bia...

Machine LearningModel Monitoring & DriftML Fundamentals
25
0
254 people solved
Mar 1, 2026
Optiver logo
Optiver
Medium
Software Engineer

Estimate expected comparisons in a BST

Estimate expected comparisons in a BST In a particular binary search tree, finding node A takes 1 comparison and finding node D takes 3 comparisons. W...

Coding & AlgorithmsTreesProbability
21
0
178 people solved
Jul 17, 2025
Google logo
Google
Medium
Software Engineer

Build a bigram next-word predictor with weighted sampling

You are given a training set of token sequences (sentences), for example: ` [["a","b","c"], ["a","s","d"]] ` 1) Train a simple next-word prediction m...

Machine LearningNatural Language ProcessingArrays & Strings
12
0
168 people solved
Jan 11, 2026
Google logo
Google
Hard
Software Engineer

Shuffle array using random integer API

You are given an array nums of length n representing a deck of distinct cards. You do not have access to a built-in shuffle function, but you are give...

Coding & AlgorithmsMath & Number TheoryArrays & Strings
10
0
145 people solved
Dec 8, 2025
SIG (Susquehanna) logo
SIG (Susquehanna)
Hard
Data Scientist Locked

Compute answers to probability and counting puzzles

Compute answers to probability and counting puzzles evaluates statistical assumptions, formulas, estimation strategy, uncertainty, edge cases, and int...

Statistics & MathPuzzles & BrainteasersProbability
8
0
150 people solved
Aug 4, 2025
Lyft logo
Lyft
Easy
Data Scientist

Determine Probability of Single Ride on Following Day

Determine Probability of a Single Ride on the Following Day A pricing experiment gives each new rider two ride opportunities on day 1. For each offere...

Statistics & MathProbability
44
0
182 people solved
Jul 12, 2025
Apple logo
Apple
Medium
Software Engineer

Design card deck with shuffle and order

Design a playing-card deck library with two methods: shuffle() to return a uniformly random permutation of a standard 52-card deck, and order() to ret...

Coding & AlgorithmsData Structure DesignSorting
6
0
126 people solved
Sep 6, 2025
Medium
Quantitative Researcher

Choose a Numbered Deck Against an Optimal Repeated Guesser

Build a deck using any number of copies of cards labeled 1 through 5. An opponent knows its composition. Each round, the opponent names a number i and...

Statistics & MathPuzzles & BrainteasersProbability
1
0
16 people solved
Jun 2, 2026
Boston Consulting Group logo
Boston Consulting Group
Medium
Data Scientist

Compute posterior and predictive coin probabilities

Bayesian coin: posterior, prediction, and stopping-time expectation Context - You have two coins and will use the same coin for all flips: - Fair co...

Statistics & MathBayesian StatisticsProbability
19
0
146 people solved
Oct 13, 2025
DRW logo
DRW
Medium
Data Scientist

Compute Markov steady state and expectations

Compute Markov steady state and expectations Probability and Game Theory: Three Sub-questions Context: The exact transition matrix P (for Q1) and the ...

Statistics & MathProbabilityPuzzles & Brainteasers
12
0
119 people solved
Jul 28, 2025
Rippling logo
Rippling
Medium
Software Engineer

Find minimum of unknown convex function

You are given access to an unknown univariate convex function \(f(x)\) defined on a closed interval \([L, R]\) on the real line. - You cannot see the ...

Machine LearningBinary Search
9
0
149 people solved
Dec 8, 2025
Google logo
Google
Medium
Product Manager

Letter-Guessing Strategy for a Program That Plays Hangman

You are interviewing for a product manager role at Google, and the interviewer asks a technical question: if you had to write a program that plays Han...

Software Engineering FundamentalsProbabilitySimulation & State Machines
1
0
13 people solved
May 18, 2025
Coinbase logo
Coinbase
Medium
Software Engineer

Generate Weighted Random NFTs with Updates

You manage k NFT types, each with a positive integer rarity weight w[i]. Implement a minter: constructor(w) builds any needed structures in O(k); mint...

Coding & AlgorithmsMath & Number TheoryTrees
32
0
300 people solved
Sep 6, 2025
Citadel logo
Citadel
Medium
Data Scientist

Derive lower bound for equicorrelation rho

Equicorrelation Matrix PSD Condition Setup Consider zero-mean, unit-variance random variables whose pairwise correlations are all equal to a common va...

Statistics & MathProbability
21
0
175 people solved
Oct 13, 2025
Meta logo
Meta
Easy
Data Scientist Locked

Compute probability an account is fake

This question evaluates understanding of conditional probability and Bayesian reasoning, specifically interpreting base rates alongside true positive ...

Statistics & MathProbability
29
1
465 people solved
Jan 17, 2026
Optiver logo
Optiver
Medium
Quantitative Trader

Compute odds under time pressure

Timed Probability: At Least Two Reds in Three Draws You have an urn with r red, b blue, and g green balls. Let N = r + b + g with r, b, g ≥ 0 and N ≥ ...

Statistics & MathProbabilityPuzzles & Brainteasers
15
0
203 people solved
Sep 6, 2025
Roblox logo
Roblox
Hard
Data Scientist

Apply Bayes' rule to compute posterior

A binary event \(A\) (e.g., “user is a payer” or “patient has a disease”) has prior probability \(P(A)\). You observe evidence \(B\) (e.g., a model pr...

Statistics & MathProbabilityBayesian Statistics
8
0
121 people solved
Nov 24, 2025
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