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Tech Interview Questions

Practice the exact questions companies are asking right now.

Questions
11.9k
Companies
570
Updated
10.05.2026
11.9k Questions 570 Companies10.05.2026
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
Capital One logo
Capital One
Medium
Software Engineer Locked

Remove 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 & AlgorithmsLinked Lists
20
0
195 people solved
Feb 12, 2026
DoorDash logo
DoorDash
Medium
Data Scientist

Boost App Installs: Analyze and Experiment with Conversion Funnel

Mobile Web Order to App Install Funnel and Experiments Many users place orders through mobile web but never install the native app. The company wants ...

Analytics & ExperimentationUser Behavior & FunnelsExperiment Design (A/B Testing)
27
0
117 people solved
Jul 12, 2025
Amazon logo
Amazon
Hard
Software Engineer

Solve Two Array Optimization Problems

This online assessment included two coding problems. Problem 1: Maximize protected city population You are given: - an integer n - an array population...

Coding & Algorithms
21
1
276 people solved
Apr 10, 2026
Adobe logo
Adobe
Hard
Machine Learning Engineer

Design a natural-language AEP Q&A assistant

Design a natural-language AEP Q&A assistant System Design: Natural-Language Assistant for Adobe Experience Platform (AEP) Goal Design a natural-langua...

ML System DesignRetrieval-Augmented GenerationAuthentication & Authorization
6
0
123 people solved
Aug 9, 2025
Lead Bank logo
Lead Bank
Medium
Software Engineer Locked

Design a hotel reservation system

This question evaluates skills in designing distributed reservation systems, covering availability search, concurrency control, data modeling, API des...

System Design
1
0
30 people solved
May 26, 2026
Amazon logo
Amazon
Medium
Product Manager

Communicating Top-Down Change

Communicating Top-Down Change Across an Operations Organization A VP has mandated an operations-wide initiative to improve safety, increase efficiency...

Behavioral & Leadership
11
0
68 people solved
Jul 4, 2025
Stripe logo
Stripe
Medium
Data Scientist

Write SQL to monitor weekly chargeback spikes

Write a single SQL query (PostgreSQL) to detect weekly chargeback spikes by country and industry. Week starts Monday (use date_trunc('week', ts) with ...

Data Manipulation (SQL/Python)
1
0
25 people solved
Oct 13, 2025
Amazon logo
Amazon
Medium
Software Engineer

Implement robust debounce and throttle in JavaScript

Implement debounce(fn, wait, options) and throttle(fn, wait, options) in JavaScript. Support leading/trailing invocation toggles, maxWait for throttle...

Coding & Algorithms
7
0
65 people solved
Sep 6, 2025
Snowflake logo
Snowflake
Hard
Data Scientist

Design an A/B test for ML model launch

Feed Ranker A/B Test Design and Powering You are replacing the current ranker with a new model in a feed. Baseline CTR is 2.0%. You expect a +5% relat...

Analytics & Experimentation
8
0
66 people solved
Oct 13, 2025
Coinbase logo
Coinbase
Hard
Software Engineer

Design a scalable URL shortener with expiration and security

System Design: URL Shortening Service at Internet Scale You are asked to design a URL shortening service for hundreds of millions of users with high a...

System DesignSystem Design FundamentalsCaching
8
0
121 people solved
Aug 12, 2025
Pinterest logo
Pinterest
Medium
Data Scientist

Develop Auto-Complete System for Dish Suggestions

Scenario Search-as-you-type needs dish suggestions with popularity scores. Question Build an auto-complete system using the given (string, score) tupl...

Coding & Algorithms
7
0
44 people solved
Jul 12, 2025
Walmart Labs logo
Walmart Labs
Medium
Data Scientist

Calculate Sample Size for Effective A/B Test Design

Calculate Sample Size for Effective A/B Test Design A/B Test Planning: Sample Size and Power Scenario You are planning an online A/B test to evaluate ...

Analytics & Experimentation
7
0
77 people solved
Aug 4, 2025
Amazon logo
Amazon
Medium
Data Scientist

Explain Decision-Tree Training and Clustering Algorithms

Explain Decision-Tree Training and Clustering Algorithms Decision Trees and Clustering: Training Mechanics and Core Principles Context Technical/phone...

Machine LearningSupervised LearningUnsupervised Learning
84
0
276 people solved
Aug 4, 2025
Airwallex logo
Airwallex
Medium
Data ScientistSenior+ Locked

Implement bootstrap mean and variance

This question evaluates the ability to implement bootstrap resampling and compute descriptive statistics, testing competency in statistical estimation...

Coding & Algorithms
5
0
49 people solved
Oct 24, 2025
Uber logo
Uber
Medium
Software Engineer

Implement uniform sampling in squares

Implement uniform sampling in squares Implement a class Square representing an axis-aligned square on the 2D plane that supports sampling a uniformly ...

Coding & AlgorithmsMath & Number TheoryProbability
7
0
89 people solved
Jul 15, 2025
Coinbase logo
Coinbase
Hard
Software Engineer

Design real-time exchange data sync system

Design real-time exchange data sync system System Design: Real-Time Multi-Exchange Stock Data Ingestion and Live Web Page Context You are asked to des...

System DesignTrading SystemsData Ingestion & CDC
6
0
124 people solved
Jul 26, 2025
Uber logo
Uber
Medium
Software Engineer

Solve minimum rate and subset sum

1) Minimum rate to finish vaults within a deadline: You are given an array vaults of positive integers representing the amount in each vault along a r...

Coding & AlgorithmsBinary SearchDynamic Programming
14
0
107 people solved
Sep 6, 2025
Akuna Capital logo
Akuna Capital
Easy
Software Engineer

Design user communication functions

Design user communication functions In-Memory Communication Manager Context Build a simple in-memory component that tracks which users can communicate...

System DesignData Structure Design
9
0
98 people solved
Aug 4, 2025
SIG (Susquehanna) logo
SIG (Susquehanna)
Medium
Data Scientist

Analyze Knights-and-Knaves Dialogue Variants

Analyze Knights-and-Knaves Dialogue Variants Knights and Knaves: Two Statements from B Context On an island, every person is either a knight (always t...

Statistics & MathPuzzles & Brainteasers
11
0
132 people solved
Aug 1, 2025
Citadel logo
Citadel
Hard
Data Scientist Locked

Solve Classic Probability Questions

This set evaluates probabilistic reasoning and expectation computation across topics such as sequential conditional survival, convolution of continuou...

Statistics & MathProbabilityPuzzles & Brainteasers
27
0
208 people solved
Feb 21, 2026
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