PracHub
QuestionsExperienceLearningGuidesInterview Prep
Visa Tools

Visa Tools

Visa Sponsors

Find employers with sponsorship filings

H-1B Odds Calculator

Explore your lottery selection odds

Visa Bulletin

Monthly green-card priority dates

PracHub

Master your tech interviews with 18,000+ real questions from top companies.

Product

  • Questions
  • Learning Tracks
  • Interview Guides
  • Resources
  • Green Card Tracker
  • Premium
  • Practice with AI agents
  • For Universities
  • Affiliate Program
  • Careers

Browse

  • By Company
  • By Role
  • By Category
  • Topic Hubs
  • Interview Experiences
  • SQL Questions
  • Blind 75
  • AI Coding Questions
  • Compare Platforms
  • Discord Community

Support

  • support@prachub.com

Legal

  • Privacy Policy
  • Terms of Service
  • About Us

© 2026 PracHub. All rights reserved.

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
Anthropic logo
Anthropic
Hard
Performance / Infrastructure Software EngineerSenior+ Locked

Explain Why This Mission and Why Change Roles Now

Practice answering why a mission matters, why a job change makes sense now, and how current work connects to future goals. The framework uses truthful...

Behavioral & Leadership
11
0
101 people solved
Aug 24, 2026
Cohere logo
Cohere
Medium
Machine Learning Engineer Locked

Design How an LLM Detects Questions Beyond Its Training Cutoff and Says So

Design how a large language model recognizes questions that depend on information after its training cutoff and tells the user where its knowledge end...

ML System DesignLLM ApplicationsFine-Tuning & Alignment Techniques
7
0
54 people solved
Sep 22, 2026
Headlands logo
Headlands
Medium
Data Scientist Locked

C++ Sliding-Window Mean of a Float Array With Inf, -Inf and NaN Handling

Compute the mean of every fixed-size sliding window over a C++ float array that may contain inf, -inf and NaN. It tests IEEE-754 semantics for special...

Software Engineering FundamentalsTwo Pointers & Sliding WindowProgramming Languages
6
0
56 people solved
Aug 30, 2026
Amazon logo
Amazon
Medium
Software EngineerSenior+

Design Sent, Delivered and Read Receipts for a Mobile Messaging App

Design the message-status feature of a large mobile messaging app. When someone sends a message, their screen shows its progress: accepted by the serv...

System DesignReal-Time SystemsDistributed Transactions & Idempotency
1
0
28 people solved
Aug 27, 2026
Google logo
GoogleAmazonMeta

Also asked at Meta, Bloomberg, Yandex

Medium
Software Engineer Locked

Find the Longest Continuous Increasing Subsequence

Find the length of the longest strictly increasing contiguous run in an integer array. The prompt distinguishes a continuous subarray from a non-conti...

Coding & AlgorithmsArrays & Strings
20
1
270 people solved
Qualified Health logo
Qualified Health
Hard
Software Engineer

Stream and Cancel Agent Responses Without Unsafe Retries

Design streaming, cancellation, and failure recovery for a multi-turn Agent/RAG conversation system. Users must be able to stop generation, while the ...

System DesignReal-Time SystemsAI Agents
2
0
33 people solved
Sep 8, 2026
Datology logo
Datology
Medium
Software Engineer Locked

Process Stateful Text Editor Commands

Implement a stateful text editor that grows from character insertion and deletion to cursor movement, newlines, and ordered print snapshots. The promp...

Coding & Algorithms
15
0
145 people solved
Sep 1, 2026
Uber logo
Uber
Hard
Software Engineer

Design a Real-Time Top-K Ranking System

Design an object-oriented, real-time Top-K ranking system. The system continuously receives score updates for a large set of entities — for example us...

Software Engineering FundamentalsData Structure DesignConcurrency
447
3
5861 people solved
May 2, 2026
Anthropic logo
Anthropic
Medium
Machine Learning Engineer Locked

Design a Double Descent Experiment

This question evaluates understanding of sample-wise double descent, experimental design for reproducible supervised-learning studies, and theoretical...

Machine LearningML FundamentalsRegression & Statistical Modeling
90
0
1450 people solved
Apr 19, 2026
Mastercard logo
MastercardInMobiIntuit

Also asked at Intuit, Amazon, Salesforce, Google, Bloomberg, NetEase

Hard
Software Engineer

Minimize Overwriting Turns of a Single-Character Printer

Problem A printer turn chooses one contiguous interval and writes the same chosen character throughout it, overwriting any existing characters. Return...

Coding & AlgorithmsDynamic ProgrammingArrays & Strings
0
0
13 people solved
Meta logo
Meta
Hard
Machine Learning Engineer Locked

Design an LLM-Based Conversational Assistant (Chatbot)

This question evaluates the ability to design an end-to-end LLM-based conversational assistant, covering pretraining, alignment, retrieval, and servin...

ML System DesignLLM ApplicationsFine-Tuning & Alignment Techniques
21
0
204 people solved
Jun 27, 2026
Google logo
Google
Medium
Software Engineer Locked

Find the Time for Grid Signals to Reach Every Target

Find when simultaneous grid signals reach every target while blockers prevent propagation, including unreachable targets and empty target sets.

Coding & AlgorithmsGrids & Matrices
9
1
157 people solved
Aug 27, 2026
Apple logo
AppleInfosysGoogle

Also asked at Google, Amazon, Meta

Medium
Software Engineer

Smallest Residue From Freely Chosen Stone Smashes

Problem You may choose any two remaining stones to smash. Equal weights disappear; weights x<y become a single stone of weight y-x. Continue until at ...

Coding & AlgorithmsDynamic ProgrammingMath & Number Theory
1
0
12 people solved
Voleon logo
Voleon
Medium
Quantitative Researcher

Row and Column Sums: Square Matrices and Nilpotence

A finite matrix has every row sum equal to 1 and every column sum equal to 1. Must the matrix be square? If so, can it be nilpotent? Constraints & Ass...

Statistics & MathPuzzles & Brainteasers
16
0
162 people solved
Jun 27, 2026
Datadog logo
Datadog
Medium
Product Manager

Bridging engineers and business stakeholders as a product manager

As a product manager, how do you work with engineering teams and, at the same time, with stakeholders who are not technical? `hint One decision, two a...

Behavioral & LeadershipCommunication & StakeholdersConflict & Collaboration
0
0
7 people solved
Oct 11, 2026
Asana logo
Asana
Medium
Software Engineer

Design a 2048 Game

Design the object model and core game logic for a 2048 game on an N x N grid. This is an object-oriented design problem: focus on the classes, their r...

Software Engineering FundamentalsLow-Level Design (OOP)Simulation & State Machines
98
0
656 people solved
Apr 2, 2026
OpenAI logo
OpenAI
Hard
Software Engineer Locked

Design a Multi-Tenant Cloud IDE: Isolation, Workspaces, Run/Build, Failure Modes

Design a browser-based cloud IDE where many untrusted users each get a workspace with files, a terminal and the ability to run and build code. Cover m...

System DesignSandboxing & IsolationContainers & Orchestration
11
0
84 people solved
Sep 20, 2026
Anthropic logo
Anthropic
Medium
Software Engineer AI Locked

Maximum-Length Unique-Character Subset

This question evaluates a candidate's ability to combine bitmasking with backtracking or subset enumeration to maximize a constraint over combinations...

Coding & Algorithms
20
1
196 people solved
Jun 23, 2026
ByteDance logo
ByteDance
Medium
Software Engineer

Maximum score from removing every token in a row, scored by neighbor products

You are given a row of n tokens, where token i carries the integer value nums[i]. You must remove every token, one at a time, in any order you choose....

Coding & AlgorithmsDynamic Programming
1
0
15 people solved
Sep 11, 2026
OpenAI logo
OpenAI
Medium
Software Engineer Locked

Find and Count Maximum-Score Grid Paths

Find the maximum-scoring path from a fixed top-row cell to the last row of a grid using diagonal, downward, and limited two-row jump moves. Return the...

Coding & AlgorithmsDynamic ProgrammingGrids & Matrices
27
0
237 people solved
Jun 11, 2026
Previous1...111112113...929Next
Popular Categories
SQLBlind 75
Daily Quest

Sign in to earn XP for every problem you solve.

Choose your next challenge

All learning

Blind 75

75 free coding problems to build your foundations, with hints, explanations, and a progress checklist.

Arrays · Graphs · Dynamic programming

Explore Blind 75

ML System Design

Work through the decisions behind machine learning systems, from data to serving.

Data · Models · Evaluation

Explore the course

System Design Interview

Practice reasoning about architecture, scale, and the tradeoffs that shape a system.

Architecture · Scale · Tradeoffs

Explore the course

Explore by company

All companies
  • Meta
  • Google
  • Amazon
  • Apple
  • Microsoft
  • Netflix
  • Capital One
  • TikTok
  • DoorDash
  • Uber
  • Coinbase
  • Airbnb
  • LinkedIn
  • Salesforce
  • Snapchat
  • Spotify
  • PayPal
  • Lyft
  • Pinterest
  • Anthropic
  • OpenAI
  • Databricks
  • Rippling
  • Jane Street

Explore by role

  • Data Scientist
  • Software Engineer
  • Machine Learning Engineer
  • Product Manager
  • Data Engineer
  • Data Analyst
  • Frontend Engineer
  • Backend Engineer
  • Site Reliability Engineer
  • Technical Program Manager

Explore by category

  • Blind 75
  • Coding & Algorithms
  • System Design
  • Machine Learning
  • ML System Design
  • SQL & Python
  • Analytics & Experimentation
  • Behavioral & Leadership
  • Statistics & Math
  • Product / Decision Making
  • Product Design & Strategy
  • SWE Fundamentals

Popular interview guides

  • Meta SWE
  • Meta DS
  • Meta PM
  • Google SWE
  • Google DS
  • Google MLE
  • Amazon SWE
  • Amazon DS
  • Amazon DE
  • Apple SWE
  • Apple MLE
  • Microsoft SWE
  • Microsoft DS
  • TikTok SWE
  • TikTok DS
  • Uber SWE
  • Uber DS
  • DoorDash SWE
  • DoorDash DS
  • Airbnb SWE
  • Airbnb DS
  • LinkedIn SWE
  • LinkedIn DS
  • Netflix SWE
  • Coinbase SWE
  • Capital One DS
  • OpenAI SWE
  • Anthropic SWE

Popular question categories

  • Blind 75
  • Meta Coding
  • Google System Design
  • Amazon Coding
  • Meta Analytics
  • Google ML
  • Amazon System Design
  • Capital One SQL
  • TikTok ML
  • Meta SQL
  • Uber Analytics
  • DoorDash Coding
  • Google Coding
  • Netflix System Design
  • Airbnb Analytics
  • LinkedIn SQL