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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
xAI logo
xAI
Hard
Software Engineer

Design a follower push-notification system

Design a notification system for a social product: - When a user publishes a new post, the system should send push notifications to that user’s follow...

System DesignReal-Time SystemsMessaging & Event-Driven
33
0
276 people solved
Feb 7, 2026
Workday logo
Workday
Medium
Software EngineerSenior+ Locked

Design an Extensible Python File Parser

This question evaluates skills in designing extensible, modular file-parsing frameworks in Python, covering interface and API design, format detection...

Software Engineering FundamentalsLow-Level Design (OOP)Parsing & Interpreters
13
0
157 people solved
Apr 1, 2026
Optiver logo
Optiver
Hard
Software Engineer Locked

Analyze an Unfair-Coin Bankroll Game

A player starts with a bankroll of 10. Explain the assumptions and derivation clearly, check edge cases, and show how the result changes when those as...

Statistics & MathProbabilityPuzzles & Brainteasers
28
0
222 people solved
May 24, 2026
DoorDash logo
DoorDash
Medium
Product Manager

DoorDash Rewards Program That Keeps Delivery Customers Coming Back

You are interviewing for a product manager role at DoorDash. Design a loyalty program for DoorDash customers whose purpose is better retention: keepin...

Product Design & StrategyGrowth & MonetizationMetrics & KPIs
0
0
9 people solved
Sep 20, 2026
J.P. Morgan logo
J.P. Morgan
Medium
Machine Learning Engineer Locked

Design an Entitlement-Aware Agentic Portfolio Workflow

Design an entitlement-aware agentic workflow that can answer portfolio requests while keeping authorization outside the model. Evaluation centers on o...

System Design
8
0
95 people solved
Aug 5, 2026
DoorDash logo
DoorDash
Medium
Data Scientist Locked

Design and Evaluate a Refund Policy for Delayed Orders

Design a data-informed refund policy for delayed orders, from defining delay severity and eligibility to choosing refund amounts. Build an experiment ...

Analytics & ExperimentationBusiness Case AnalysisExperiment Design (A/B Testing)
26
0
183 people solved
Jul 19, 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
30
0
265 people solved
Feb 3, 2026
Google logo
GoogleMetaMicrosoft

Also asked at Microsoft, Oracle, SoFi

Hard
Software Engineer

Select the Most Disjoint Palindromic Substrings of Sufficient Length

Problem Choose non-overlapping contiguous substrings of lowercase s. Every selected substring must be a palindrome and have length at least k. Return ...

Coding & AlgorithmsDynamic ProgrammingArrays & Strings
0
0
9 people solved
Nextdoor logo
Nextdoor
Medium
Software Engineer

Merge Weekly Time Intervals

You are given a list of time intervals within a single week. Each time is written as a day-of-week plus a 24-hour clock, for example Sat 13:00 or Mon ...

Coding & AlgorithmsIntervals & Scheduling
23
0
172 people solved
Mar 16, 2026
SIG (Susquehanna) logo
SIG (Susquehanna)
Easy
Data Scientist Locked

Deduce Cat Counts from Conditional Truth Rules

Deduce three distinct cat counts when each speaker's truthfulness depends on whether the listener owns more cats. The solution derives the ordering, c...

Statistics & Math
4
0
36 people solved
Aug 16, 2026
Walmart Labs logo
Walmart Labs
Medium
Software Engineer

Minimize the Maximum Edge on a Path

Minimize the Maximum Edge on a Path You are given a weighted undirected graph and two vertices, start and target. Define the stress of a path as the l...

Coding & Algorithms
4
0
63 people solved
Apr 12, 2026
Asana logo
Asana
Medium
Software Engineer

Explain code complexity and design two games

You are given three independent interview prompts. 1) Code comprehension & complexity - Given two short code snippets (language-agnostic), explain in ...

Software Engineering FundamentalsLow-Level Design (OOP)Simulation & State Machines
62
0
440 people solved
Feb 8, 2026
Medium
Analytics Engineer

Continue Entry Numbers for a Daily Incremental Batch

Continue Entry Numbers for a Daily Incremental Batch The source relation is named entries for this exercise and has these columns: | Column | Meaning ...

Data Manipulation (SQL/Python)SQL
2
0
29 people solved
Sep 12, 2026
Palo Alto Networks logo
Palo Alto Networks
Medium
Product Manager

Removing the Root Causes That Drive Customers to a Self-Help Support Chatbot

Customers turn to a self-help chatbot whenever they need support. How would you eliminate the demand on that chatbot, so that fewer customers need it ...

Product Design & StrategyProduct Design & Improvement
1
0
10 people solved
Sep 28, 2026
Harvey logo
Harvey
Hard
Software Engineer Locked

Implement Spreadsheet Cell Updates

This question evaluates skills in data structures, expression parsing, dependency graph management, incremental evaluation, and cycle detection for ma...

Coding & AlgorithmsGraphsData Structure Design
21
0
142 people solved
May 9, 2026
Google logo
GoogleBloomberg
Medium
Software Engineer

Apply Matching String Replacements Simultaneously

Problem Parallel arrays indices,sources,targets describe replacements in the original string s. At each indices[i], replace sources[i] with targets[i]...

Coding & AlgorithmsArrays & Strings
1
0
21 people solved
Turo logo
Turo
Medium
Software Engineer

Design trip booking REST API and schema

Design a RESTful API for a guest to book a trip. Include: - Core endpoints (search availability, create booking, view/cancel booking, payment/confirma...

System DesignAPI DesignIndexing & Query Performance
16
0
169 people solved
Feb 12, 2026
New Relic logo
New Relic
Medium
Backend Engineer

Design a Kafka Consumer Service That Groups Trace Events by Trace ID

Design a distributed event-processing system that consumes trace events from Kafka and groups together all events that belong to the same trace, so th...

System DesignMessaging & Event-DrivenBatch & Stream Processing
1
0
23 people solved
Sep 23, 2026
Millennium logo
Millennium
Medium
Software EngineerIntern

Explain a Project and Its Hardest Engineering Challenge

Choose a project you actually worked on and explain what you built, what you personally owned, and which engineering problem was hardest. Be prepared ...

Behavioral & LeadershipProject Deep Dive
8
0
61 people solved
Apr 26, 2026
OpenAI logo
OpenAI
Medium
Software Engineer

Implement a memory allocator with malloc/free

Problem You are implementing a simplified memory allocator over a contiguous memory region. Initialize the allocator with a fixed total size: - alloca...

Coding & AlgorithmsData Structure DesignMemory Management
35
0
385 people solved
Jan 9, 2026
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