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Tech Interview Questions

Practice the exact questions companies are asking right now.

Questions
18.6k
Companies
980
Updated
11.12.2026
18.6k Questions 980 Companies11.12.2026
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
TaskRabbit logo
TaskRabbit
Medium
Product Manager

TaskRabbit: Diagnose and Fix the Biggest Pain Points After a Client Books a Tasker

You are a product manager at TaskRabbit, the marketplace where clients hire independent Taskers for jobs such as furniture assembly, TV mounting, movi...

Product Design & StrategyProduct Design & ImprovementMetrics & KPIs
0
0
7 people solved
Jul 13, 2026
Coinbase logo
Coinbase
Medium
Data Scientist

Design Identity-Trust A/B Test

You are interviewing for a Data Scientist role on an Identity & Trust team at a consumer product company. The team wants to launch a feature that stre...

Analytics & Experimentation
9
0
73 people solved
Feb 13, 2026
Coinbase logo
Coinbase
Medium
Software Engineer Locked

Compute Total Manual Distance

This question evaluates array processing, state simulation, and algorithmic reasoning for deterministic stepwise processes, including handling unsorte...

Coding & Algorithms
7
0
79 people solved
Mar 29, 2026
Coinbase logo
Coinbase
Hard
Software Engineer

Design scheduled payments and cancellation

Question Design a scheduled payments service for Coinbase that lets users create, list, update, execute, and cancel future-dated payments — both one-t...

System DesignPayments & LedgersDistributed Transactions & Idempotency
10
0
196 people solved
Sep 6, 2025
Uber logo
Uber
Medium
Product Manager

Diagnose Why Fewer Uber Ride Requests End in Confirmed Trips, Then Fix It

You are a product manager at Uber. The ride confirmation rate, broadly how often a rider's request turns into a confirmed ride, has dipped, and you ow...

Analytics & ExperimentationMetric DiagnosticsUser Behavior & Funnels
1
0
11 people solved
Sep 3, 2026
Mintlify logo
Mintlify
Medium
Software Engineer

Why an Index on an Unindexed Filter Column Speeds Up a Slow Query, and Its Costs

A database query against a large table runs slowly. The query filters rows on a column that has no index. Explain what adding an index on that column ...

Software Engineering FundamentalsIndexing & Query PerformanceDatabase Internals
0
0
2 people solved
Jul 26, 2026
DoorDash logo
DoorDash
Hard
Software Engineer

Design cron scheduler and reward/review system

System Design: Company-Wide Scheduler Platform and Employee Review & Rewards System You are designing two platforms for a fast-growing, multi-tenant t...

System DesignJob Scheduling & WorkflowsDistributed Coordination
13
0
219 people solved
Sep 6, 2025
Square logo
Square
Medium
Product Manager

Product Sense: Building a Product to Flag and Stop Fraudulent Card Payments

Design a system that detects fraudulent credit card transactions. Treat it as a product problem: decide whose losses the system protects and which use...

Product Design & StrategyTrust & SafetyMetrics & KPIs
1
0
9 people solved
Feb 4, 2026
Microsoft logo
Microsoft
Medium
Data Scientist

Query email logs for deliverability insights

Using the schema and sample data below, write SQL to answer parts a–c. Assume timestamps are UTC. Today is 2025-09-01. Schema: - Emails(sent_id INT, m...

Data Manipulation (SQL/Python)
6
0
62 people solved
Oct 13, 2025
Adobe logo
Adobe
Easy
Data Scientist

Understand P-Value's Role in Product Decision-Making

Understand P-Value's Role in Product Decision-Making Scenario You are a data scientist presenting A/B test results to non-technical executives who mus...

Statistics & Math
6
0
90 people solved
Aug 4, 2025
Coinbase logo
Coinbase
Medium
Software Engineer

Compute delivery metrics and top-K queries

Compute delivery metrics and top-K queries You have restaurant menus and orders for a food delivery platform. Part 1: Given a user location and a set ...

Data Manipulation (SQL/Python)Heaps & Priority QueuesBatch & Stream Processing
13
0
130 people solved
Jul 31, 2025
eBay logo
eBay
Medium
Software Engineer Locked

Design a Top-K trending service

This question evaluates skills in distributed system design, real-time stream processing, scalable aggregation, windowing semantics, and trade-offs ar...

System DesignReal-Time SystemsBatch & Stream Processing
7
0
143 people solved
Jan 15, 2026
LinkedIn logo
LinkedIn
Medium
Machine Learning Engineer Locked

Implement K-Means and Explain Convergence

Implement K-means clustering in Python and explain convergence. Covers assignment and update steps, stopping criteria, empty clusters, objective funct...

Coding & Algorithms
12
0
93 people solved
May 3, 2025
Citadel logo
Citadel
Hard
Machine Learning Engineer

Make a hard MoE router differentiable

Make a hard MoE router differentiable Differentiable Routing for Mixture-of-Experts (MoE) Context You are working with an MoE layer that routes each t...

Machine LearningNeural Networks & Training
33
0
235 people solved
Jul 15, 2025
Instacart logo
Instacart
Easy
Data Scientist

Design a pricing experiment with network effects

Scenario You want to launch a new pricing model that incentivizes shoppers to place/pick up more orders during rush hours in a two-sided marketplace (...

Analytics & ExperimentationExperiment Design (A/B Testing)Causal Inference
30
0
225 people solved
Feb 6, 2026
Google logo
Google
Medium
Product Manager

Design a Product That Solves Coordination Problems for Groups Traveling Together

You are asked to build a new product for group travel: trips that several people plan and take together. Decide whom the product is for, find the prob...

Product Design & StrategyProduct SenseMetrics & KPIs
0
0
7 people solved
Jun 11, 2026
Coinbase logo
Coinbase
Medium
Data Scientist Locked

Calculate Conversion Lift CI

This question evaluates statistical inference skills for proportions, specifically construction and interpretation of confidence intervals and hypothe...

Statistics & MathHypothesis TestingExperiment Analysis & Readout
9
0
109 people solved
Jan 21, 2026
StackAdapt logo
StackAdapt
Easy
Software Engineer

Explain hash collisions and Java HashMap complexity

Explain hash collisions and Java HashMap complexity in a software engineering interview. Cover how hashing works, what a collision is, how a hash tabl...

Software Engineering FundamentalsData Structure DesignProgramming Languages
17
0
172 people solved
Mar 4, 2025
Uber logo
Uber
Medium
Software Engineer

Design a pickup-area driver queue

Design an internal service for a ride-hailing company that maintains a driver queue for each pickup area, such as an airport pickup zone or staging lo...

System DesignSystem Design FundamentalsAPI Design
28
0
259 people solved
Feb 22, 2026
Reddit logo
Reddit
Medium
Product Manager

Vulture Thought Experiment: Trace the Ripple Effects of a Head Twice as Large

Imagine a vulture's head became twice as large. Using root cause analysis, explain how that change would affect the bird's survival and its ability to...

Analytics & Experimentation
0
0
7 people solved
Nov 10, 2025
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