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Tech Interview Questions

Practice the exact questions companies are asking right now.

Questions
12.2k
Companies
569
Updated
10.14.2026
12.2k Questions 569 Companies10.14.2026
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
Verkada logo
Verkada
Medium
Software Engineer

Find motion intervals above threshold

You are processing data from a single security camera. You are given: - A threshold value T (a real number). - A vector (array) of time-stamped motion...

Coding & AlgorithmsArrays & Strings
14
0
170 people solved
Dec 8, 2025
Optiver logo
Optiver
Hard
Data Scientist

Market-Making Estimation Game: Optimal Confidence-Interval Strategy Over 5 Rounds

You are interviewing with a proprietary trading firm, and one of the rounds is a market-making game played over 5 rounds. In each round, the interview...

Machine Learning
17
0
172 people solved
Sep 28, 2025
Nooks logo
Nooks
Medium
Software Engineer

Design a Twitter-like timeline service

Design a simplified Twitter-like system. The system should support: - User accounts and profiles - Follow and unfollow - Creating short text posts - V...

System Design
10
0
90 people solved
Feb 28, 2026
Amazon logo
Amazon
Medium
Software Engineer

Find earliest time password becomes irrecoverable

You are given a password string of length n and an attack order array attackOrder[1..n], a permutation of 1..n. At second i (1-indexed), the virus rep...

Coding & Algorithms
5
0
46 people solved
Sep 6, 2025
Amazon logo
Amazon
Medium
Data Scientist

Calculate Regional Revenue and Identify Top Customers

Customers | customer_id | name | region | |-------------|-------|--------| | 1 | Alice | East | | 2 | Bob | West | | 3 ...

Data Manipulation (SQL/Python)SQLMetrics & KPIs
22
1
138 people solved
Jul 12, 2025
Verkada logo
Verkada
Hard
Software Engineer

Design camera access-control service

Design camera access-control service Design an Access-Control Service (Users, Cameras, Nested Groups) Context You are building a multi-tenant access-c...

System DesignAuthentication & AuthorizationStorage & Sharding
28
0
229 people solved
Aug 8, 2025
Pinterest logo
Pinterest
Hard
Software Engineer

Design a Google Photos–like service

System Design: Google Photos–like Service (Web + Mobile) Context Design a large-scale consumer media service that ingests, stores, indexes, and serves...

System DesignFile & Media StoragePrivacy & Compliance
15
0
249 people solved
Sep 6, 2025
Palo Alto Networks logo
Palo Alto Networks
Medium
Software Engineer

Implement an Alert Execution Engine

You are given an alert client API that provides alert configurations, metric query execution, and notification methods. Implement an alert execution e...

Coding & Algorithms
3
0
67 people solved
Feb 13, 2026
Anthropic logo
Anthropic
Medium
Software Engineer

Implement Python LRU cache with args and persistence

Implement an LRU cache in Python as a decorator or class that correctly supports variable-length positional arguments and keyword arguments. Ensure th...

Coding & AlgorithmsData Structure Design
60
0
406 people solved
Aug 1, 2025
Onepay logo
Onepay
Easy
Software Engineer Locked

Design a Discord-Style Communication Platform

Design a Discord-style platform with organizations, channels, direct messages, membership, and real-time text delivery. Cover durable history, permiss...

System Design
6
0
56 people solved
Jul 8, 2026
Databricks logo
Databricks
Hard
Software Engineer Locked

Design CRUD APIs with async jobs

This question evaluates a candidate's ability to design backend services that combine CRUD operations with asynchronous background job processing, emp...

System DesignSystem Design FundamentalsAPI Design
28
0
359 people solved
Jan 7, 2026
Netflix logo
Netflix
Hard
Software Engineer Locked

Design command executor with undo

This question evaluates understanding of the command pattern, state and history management, failure handling, and appropriate data structure use for i...

Coding & AlgorithmsLow-Level Design (OOP)Stacks & Queues
15
0
114 people solved
Jan 20, 2026
Nielsen logo
Nielsen
Medium
Backend EngineerSenior+ Locked

Design a Train Ticket Booking System

This question evaluates a backend engineer's competency in object-oriented design, SOLID principles, API and service design, data modeling, concurrenc...

Software Engineering Fundamentals
5
0
39 people solved
May 20, 2026
Apple logo
Apple
Medium
Software EngineerIntern

Answer OoO, caches, and memory-system questions

You are interviewing for a CPU/DV role. Provide clear explanations (and small worked examples where useful) for the following computer architecture to...

Software Engineering FundamentalsOperating Systems
16
0
182 people solved
Feb 9, 2026
J.P. Morgan logo
J.P. Morgan
Medium
Software Engineer Locked

Design a Scalable Notification System

This question evaluates a candidate's ability to design a large-scale, asynchronous notification platform that fans messages out across push, email, a...

System DesignMessaging & Event-DrivenRate Limiting
11
0
131 people solved
Jun 9, 2026
Robinhood logo
Robinhood
Medium
Software Engineer

Defend the Complexity and Scalability of a Project

Defend the Complexity and Scalability of a Project Prepare a project deep dive in which the interviewer repeatedly challenges what was technically dif...

Behavioral & Leadership
3
0
48 people solved
Apr 21, 2026
Hudson River Trading logo
Hudson River Trading
Medium
Data Scientist Locked

Solve Dice Probability and Matrix Questions

This question evaluates probability reasoning for modular distributions of sums of independent dice and linear algebra competency regarding matrices w...

Machine Learning
8
0
78 people solved
May 28, 2026
Transunion logo
Transunion
Easy
Data ScientistIntern

How would you answer a DS video interview?

Question You are interviewing for a Data Scientist Intern role at TransUnion. The technical screen is an asynchronous (one-way) video interview: you a...

Behavioral & LeadershipCommunication & Stakeholders
24
0
213 people solved
Feb 3, 2026
Shopify logo
Shopify
Medium
Machine Learning Engineer

Design and implement a word-guessing game

Word-Guessing Game (Wordle-like) — Design and Implement Context Build a small, standalone command-line application that lets a user guess a secret wor...

System DesignSimulation & State MachinesArrays & Strings
66
0
447 people solved
Aug 12, 2025
Ramp logo
Ramp
Medium
Software Engineer Locked

Answer a Ramp Engineering Video Interview

This Ramp behavioral interview question prepares candidates for an engineering video screen focused on ownership, communication, and product judgment....

Behavioral & LeadershipMotivation & FitAI-Assisted Development
7
0
88 people solved
Jul 2, 2026
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