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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
OpenAI logo
OpenAI
Medium
Software Engineer Locked

Compute Plant Infection Stabilization

This question evaluates a candidate's ability to model and simulate discrete-time state transitions on grids, reason about propagation dynamics and ev...

Coding & AlgorithmsSimulation & State MachinesGrids & Matrices
29
0
203 people solved
Feb 17, 2026
Robinhood logo
Robinhood
Medium
Backend Engineer

Critique a Recent Engineering Project and Explain What You Would Redo

Critique a Recent Engineering Project and Explain What You Would Redo Choose a meaningful engineering project from roughly the last two years. Give a ...

Behavioral & Leadership
10
0
87 people solved
Jul 17, 2026
Whatnot logo
Whatnot
Easy
Software Engineer

Solve Adjacent-Deletion and Sorted-Square Problems

Solve the following coding problems. Discuss the approach and complexity before implementation. Problem 1: Remove adjacent duplicate pairs Given a str...

Coding & Algorithms
6
0
101 people solved
Apr 24, 2026
Meta logo
Meta
Easy
Data Scientist

How to evaluate a similar-listing notifications feature

Question You are a Data Scientist on a US C2C marketplace app (like Facebook Marketplace) where users buy and sell second-hand products. Current produ...

Analytics & ExperimentationLaunch EvaluationMetrics & KPIs
120
1
1026 people solved
Jan 17, 2026
OpenAI logo
OpenAI
Easy
Software Engineer

Design a Versioned Social Follow Graph with Friend Recommendations

Design a Versioned Social Follow Graph with Friend Recommendations Build an in-memory service that maintains a directed follow graph between users and...

Coding & Algorithms
14
2
88 people solved
Mar 16, 2026
Jane Street logo
Jane Street
Hard
Machine Learning Engineer

Build a time-series forecasting model

Build a time-series forecasting model Forecast the Next H Steps for Time Series Context You are given one or more time series with timestamps and nume...

Machine LearningTime Series & Forecasting
70
0
853 people solved
Aug 1, 2025
StackAdapt logo
StackAdapt
Easy
Software Engineer

Design a Recipe and Inventory Ordering Service

Design a Recipe and Inventory Ordering Service Scenario Design an object-oriented service with recipes, supplies, and orders. A recipe has a unique na...

Software Engineering FundamentalsLow-Level Design (OOP)Graphs
18
0
170 people solved
Apr 4, 2026
Two Sigma logo
Two Sigma
Hard
Data Scientist

Predict Citi Bike Demand at a Specific NYC Station

Citi Bike is New York City's bike-share system: riders pick up a bike at one docked station and drop it off at another. Operations needs to know how m...

ML System DesignTime Series & ForecastingFeature Engineering
27
1
213 people solved
Nov 28, 2025
Sig logo
Sig
Medium
Quantitative Trader

Expected Spins of an Unequal Spinner to Land in K Distinct Regions

A spinner has $N$ regions. Each spin lands in region $i$ with probability $p_i$, independently of all other spins, where $p_1 + p_2 + \dots + p_N = 1$...

Statistics & MathProbabilityDynamic Programming
0
0
5 people solved
Sep 19, 2026
Ramp logo
Ramp
Hard
Software Engineer Locked

Build a Resilient Chain of Clue-Driven HTTP Requests

Design a robust client that follows clue-driven HTTP responses until it reaches a result. Work through retry budgets, deadlines, backoff, malformed pa...

Software Engineering FundamentalsAPI Integration & HTTP ClientsApplication Security
12
0
228 people solved
Jul 18, 2026
OpenAI logo
OpenAI
Hard
Machine Learning Engineer

Compute time to infect all cells

You are given an n × m grid representing people in a city. - Each cell is either infected (1) or healthy (0). - Two cells are neighbors if they share ...

Coding & AlgorithmsGrids & MatricesGraphs
142
1
1298 people solved
Oct 24, 2025
Goldman Sachs logo
Goldman Sachs
Easy
Data ScientistIntern Locked

Maximize Covariance from Known Variances

Determine the maximum possible covariance when two random variables have variances 3 and 27.

Statistics & Math
4
0
36 people solved
Sep 2, 2026
Attentive logo
Attentive
Medium
Software Engineer Locked

Design a Snapshot-Driven Product Catalog

Design a retailer product catalog built from complete snapshots while preserving administrator overrides as a separate source of truth. Candidates nee...

System Design
14
1
104 people solved
Aug 2, 2026
Hudson River Trading logo
Hudson River Trading
Medium
Software Engineer Locked

Minimize Array Amplitude After Removing a Contiguous Block

This Hudson River Trading software engineering question evaluates array reasoning for minimizing amplitude after removing a contiguous block. It prepa...

Software Engineering FundamentalsArrays & StringsTwo Pointers & Sliding Window
20
2
163 people solved
Jul 2, 2026
Instacart logo
Instacart
Medium
Software Engineer

Respond to Negative Feedback About Your Work

Describe a time you received negative feedback about your work. What was the feedback, how did you determine what was valid, and what did you do in re...

Behavioral & LeadershipConflict & CollaborationCommunication & Stakeholders
2
0
22 people solved
Aug 28, 2026
ByteDance logo
ByteDance
Medium
Software Engineer

Design a Payment System: Time-Boxed High-Level Design

Design a payment system that lets a product accept payments from its users: a user checks out, is charged, and the purchase is confirmed only once the...

System DesignPayments & LedgersDistributed Transactions & Idempotency
0
0
6 people solved
Sep 10, 2026
Sig logo
Sig
Medium
Quantitative Trader

Probability Limited Stock Covers Every Customer in a Queue

A queue of $N$ customers is waiting in a store. Each customer will buy exactly one item: product A with probability $p$, or product B with probability...

Statistics & MathProbability
0
0
5 people solved
Sep 19, 2026
OpenAI logo
OpenAI
Medium
Software Engineer Locked

Explain Your Technical Focus and Responsible Use of AI

Describe the most important engineering work you currently own and how AI tools or AI-enabled features affect that work. Use a concrete situation, you...

Behavioral & Leadership
7
0
57 people solved
Aug 1, 2026
Kikoff logo
Kikoff
Easy
Software Engineer Locked

Build a Robust Log Parser and Prefix-Operator Search

Design a tool that parses a list of server-log strings into structured records with timestamp, level, service, message, and optional user identifier. ...

Software Engineering Fundamentals
5
0
57 people solved
Jul 31, 2026
Two Sigma logo
Two Sigma
Medium
Software Engineer Locked

Implement Price-Time Order Matching

This question evaluates understanding of limit-order book mechanics, priority-based matching, stateful stream processing, and data-structure managemen...

Coding & Algorithms
15
0
100 people solved
May 9, 2026
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