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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
Microsoft logo
Microsoft
Medium
Data Scientist Locked

How would you build and evaluate a classifier?

This question evaluates a data scientist's proficiency in binary classification model evaluation, end-to-end machine learning project design, and mode...

Machine Learning
4
0
62 people solved
Jan 16, 2026
Bridgewater logo
Bridgewater
Medium
Software Engineer Locked

Defend the Technical Details of a Project

Defend one project through a focused technical deep dive into its problem, architecture, request or data flow, and hardest implementation choices. Exp...

Behavioral & Leadership
1
0
32 people solved
Jul 8, 2026
Apple logo
Apple
Hard
Software Engineer

Migrate a monolithic wallet to microservices

System Design: Migrating a Monolithic Digital Wallet (Apple Cash–like) to Microservices Context You operate a high-scale consumer digital wallet and p...

System DesignPayments & LedgersDistributed Transactions & Idempotency
7
0
101 people solved
Sep 6, 2025
Meta logo
Meta
Medium
Data Scientist Locked

Assess Demand for Group Video Chat

This question evaluates skills in product analytics, causal inference from observational data, demand estimation, survey design, and executive-level s...

Analytics & ExperimentationUser Research & DiscoveryProduct Strategy
8
0
84 people solved
Mar 14, 2026
Meta logo
Meta
Medium
Data Scientist

Analyze View Distribution and Recommendation Overlap in Videos

Analyze View Distribution and Recommendation Overlap in Videos Short-Video Platform: View Distribution and Recommendation Overlap Context You are anal...

Statistics & Math
9
0
67 people solved
Aug 4, 2025
Carvana logo
Carvana
Easy
Software Engineer

Design an Attendance Payroll Service

Design the backend service for an employee attendance system. The service should support: - Employees clocking in and clocking out. - Computing each e...

System Design
3
0
47 people solved
Apr 26, 2026
PayPal logo
PayPal
Medium
Data Scientist

Explain past experience and role fit

Explain past experience and role fit Behavioral Prompt: Risk/Fraud Analytics Experience and Role Alignment Context You are interviewing onsite for a D...

Behavioral & LeadershipMotivation & FitProject Deep Dive
12
0
89 people solved
Jul 31, 2025
TikTok logo
TikTok
Hard
Software Engineer

Explain Your System Architecture

Explain Your System Architecture System Design Interview: End-to-End Architecture Deep Dive Task Explain the end-to-end architecture of a production s...

System DesignSystem Design FundamentalsMessaging & Event-Driven
10
0
91 people solved
Jul 29, 2025
Coinbase logo
Coinbase
Hard
Data Scientist

Diagnose a 20% retail revenue drop

E-commerce Revenue Drop Diagnosis Case Context Week T net revenue is down 20% versus the prior 4-week moving-average baseline. You have weekly e-comme...

Analytics & ExperimentationMetric DiagnosticsBusiness Case Analysis
11
0
105 people solved
Oct 13, 2025
TikTok logo
TikTok
Medium
Data Scientist

Optimize Job Routing in Parallel Machine Scheduling

Scenario In the Production Factory game, jobs with varying processing times arrive and must be routed through two parallel machines to minimize total ...

Coding & Algorithms
25
0
60 people solved
Jul 12, 2025
ByteDance logo
ByteDance
Medium
Software EngineerSenior+

Implement Sliding Windows and LRU Cache

You are given two coding tasks. Task 1: Longest Subarray of Ones Given a binary array nums and an integer k, return the maximum length of a contiguous...

Coding & Algorithms
3
0
27 people solved
Apr 20, 2026
Microsoft logo
Microsoft
Hard
Software Engineer Locked

Design a URL Shortener

This question evaluates a candidate's ability to design a scalable, highly available URL-shortening service, testing competencies in API design, short...

System Design
10
0
71 people solved
Mar 20, 2026
Salesforce logo
Salesforce
Hard
Software Engineer Locked

Design an async job system and cache layer

This question evaluates system design competencies including asynchronous job orchestration, reliable background processing (state transitions, retrie...

System DesignSystem Design FundamentalsCaching
16
0
161 people solved
Jan 22, 2026
Uber logo
Uber
Hard
Data Scientist

Measure Impact of Updated Rider ETA Algorithm

Measure the Impact of an Updated Rider ETA Algorithm A ride-hailing company updated the rider ETA prediction shown before a rider requests a trip. The...

Analytics & ExperimentationExperiment Design (A/B Testing)Metrics & KPIs
52
0
133 people solved
Jul 12, 2025
Meta logo
Meta
Medium
Machine Learning Engineer

Implement exponentiation and link tree neighbors

Solve two independent tasks. Task A — Fast exponentiation: Implement fastExponent(x, n) that returns x raised to the integer power n, where x is a dou...

Coding & Algorithms
5
0
55 people solved
Sep 6, 2025
Intuit logo
Intuit
Hard
Data Scientist Locked

Decide when to model courier ETA

This question evaluates a candidate's competency in machine learning product decisions—covering target definition, dispatch-time feature design, offli...

Machine Learning
9
0
83 people solved
Oct 13, 2025
Snapchat logo
Snapchat
Medium
Data Scientist

Compute User Group Stories and Aggregate Story Engagement

user_story_engagement +---------+----------+------------+------------+-------+-------+ | user_id | story_id | story_type | created_at | views | likes ...

Data Manipulation (SQL/Python)
97
0
243 people solved
Jul 12, 2025
Meta logo
Meta
Medium
Data Scientist

Analyze Mobile Promo Orders with SQL Query and Metrics

orders +-----------+---------+--------------+------------+-----------+----------+ | order_id | user_id | order_amount | order_date | is_mobile | is_p...

Data Manipulation (SQL/Python)
4
0
28 people solved
Aug 4, 2025
Upstart logo
Upstart
Medium
Data Scientist

Manipulate data in R with dplyr joins and windows

Using R and dplyr, answer the following using these small tables (dates are ISO strings): transactions(user_id, order_id, order_date, channel, amount)...

Data Manipulation (SQL/Python)
1
0
18 people solved
Oct 13, 2025
Dropbox logo
Dropbox
Medium
Data Scientist

Answer rapid-fire leadership checklist

Answer a rapid-fire leadership checklist: (a) Describe a time you protected customer privacy under executive time pressure—what did you refuse to log ...

Behavioral & Leadership
4
0
54 people solved
Oct 13, 2025
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