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
Databricks logo
Databricks
Hard
Software EngineerNew Grad

Implement streaming RLE and bit-packed codec

You are implementing a simple compression scheme for sequences of 32‑bit signed integers. The codec should support two encoding strategies: 1. Run‑Len...

Coding & AlgorithmsData Structure DesignBit Manipulation
99
0
1316 people solved
Dec 10, 2025
Google logo
Google
Hard
Software Engineer Locked

Design a Scalable and Safe Agentic System

Design a scalable service where an AI agent plans work and invokes approved tools without bypassing deterministic controls. Address durable execution,...

ML System DesignAI AgentsJob Scheduling & Workflows
135
0
910 people solved
Jul 10, 2026
Stripe logo
Stripe
Medium
Software Engineer

Generate Account Email Notifications

You are building an email notification scheduler for user accounts. You are given: 1. A list of user accounts. Each account has: - account_id - ...

Coding & AlgorithmsArrays & Strings
86
1
841 people solved
Apr 14, 2026
Anthropic logo
Anthropic
Hard
Software EngineerSenior+

Review and Improve a Flawed Design Document

Review and Improve a Flawed Design Document You are given a design document for a system that has important omissions or unsafe assumptions. Review it...

System DesignSystem Design FundamentalsFault Tolerance & Failover
21
0
376 people solved
Apr 16, 2026
Waymo logo
WaymoGoogleAmazon

Also asked at Amazon, UnifyApps, Meta, Bloomberg, PhonePe, Microsoft, Cisco

Medium
Software Engineer Locked

End-Picking Number Game: Can the First Player Win Under Optimal Play?

Two players alternately take a number from either end of a row and add it to their score; decide whether the first player can finish with at least as ...

Coding & AlgorithmsDynamic Programming
7
0
67 people solved
Instalily logo
Instalily
Easy
Software Engineer

Handle a Disagreement with a Coworker

Tell me how you handled a conflict or disagreement with a coworker. What a Strong Answer Covers A specific example, your personal actions, a completed...

Behavioral & LeadershipConflict & Collaboration
0
0
5 people solved
Oct 19, 2026
MongoDB logo
MongoDB
Medium
Software EngineerSenior+

Code review exercise: find concurrency, failure and ownership bugs in a small job queue

This round hands you a small coding project and asks you to review it as you would a colleague's work: find the gaps, the implementation problems and ...

Software Engineering FundamentalsCode Quality & MaintainabilityConcurrency
5
0
69 people solved
Jul 12, 2026
Pinterest logo
Pinterest
Medium
Software Engineer Locked

Delete and Compact a Forest Stored by Parent Indices

Delete a target node and all descendants from a forest represented by parent indices. Support both tombstoning and compacting modes, preserve survivor...

Coding & Algorithms
18
0
136 people solved
Aug 13, 2026
Google logo
GoogleMeta
Medium
Software Engineer

Place a Binary Tree in Its Prescribed String Grid

Problem Construct a string grid for root. Let h be tree height in edges, so the grid has h+1 rows and 2^(h+1)-1 columns. Put root at row 0 and the mid...

Coding & AlgorithmsTreesGrids & Matrices
2
0
17 people solved
Wisdomai logo
Wisdomai
Hard
Software Engineer

Enumerate Disjoint Pairs of Target-Sum Subrectangles

Given a two-dimensional array of nonnegative values and an integer k, find every unordered pair of nonempty axis-aligned subrectangles such that each ...

Coding & AlgorithmsGrids & MatricesArrays & Strings
0
0
8 people solved
Oct 20, 2026
Anthropic logo
Anthropic
Hard
Software EngineerSenior+

Function-Call LRU Cache: Argument Key Generation and Crash Recovery from a Log

Build an LRU (least recently used) cache that memoizes function calls in Python. When a function is called with arguments whose result is already in t...

Software Engineering FundamentalsData Structure DesignDatabase Internals
3
0
57 people solved
Jul 26, 2026
xAI logo
xAI
Easy
Software Engineer

Implement an in-memory database with TTL and backup

In-Memory Database (Levels 1–4: TTL and Backup/Restore) Implement an in-memory database that stores records identified by a string key. Each record co...

Coding & AlgorithmsData Structure Design
148
3
1430 people solved
Jan 6, 2026
Glean logo
Glean
Medium
Data Scientist

Product Case: Define Success Metrics for a Product, Using Enterprise Search as Example

In a hiring-manager interview for a data scientist role, one question was a product case: how would you measure the success of a product? The report d...

Analytics & ExperimentationMetrics & KPIsExperiment Design (A/B Testing)
1
0
37 people solved
Sep 30, 2026
OpenAI logo
OpenAI
Hard
Software Engineer Locked

Design a Dependency-Aware Concurrent Tool Scheduler

Design a dependency-aware concurrent tool scheduler with validated per-agent DAGs, a global execution limit, fair ready queues, atomic state transitio...

Software Engineering FundamentalsJob Scheduling & WorkflowsConcurrency
29
0
299 people solved
Aug 16, 2026
Playstation logo
Playstation
Medium
Software Engineer

Refactor a Shopping Cart to Print Grouped, Promoted, Sorted Receipts

This object-oriented coding exercise has a 30-minute time box and starts from existing code. A ShoppingCart class keeps the items a customer has scann...

Software Engineering FundamentalsLow-Level Design (OOP)Code Quality & Maintainability
2
0
18 people solved
Oct 10, 2026
Amazon logo
Amazon
Easy
Business Intelligence Engineer Locked

Reason About Composite Join Keys and Predicate Placement

Reason about a two-column SQL join key and a right-side predicate without assuming a schema or join type. Compare inner- and left-join semantics, card...

Data Manipulation (SQL/Python)
7
0
141 people solved
Aug 14, 2026
Charta Health logo
Charta Health
Medium
Software Engineer Locked

Make Token-Bucket Admission Safe Across Threads

Explain thread-safe token-bucket admission through atomic refill and consumption, consistent clocks, correct waiting, and targeted concurrent race che...

Software Engineering FundamentalsConcurrencyRate Limiting
8
0
94 people solved
Aug 26, 2026
Google logo
Google
Medium
Software Engineer

Design a customer support agent dispatcher that handles mid-request breaks

Design and implement the core of a dispatcher for a customer support team. Customers contact support and wait for help. Human support agents sign in, ...

Software Engineering FundamentalsLow-Level Design (OOP)Simulation & State Machines
3
0
33 people solved
Sep 21, 2026
Google logo
GoogleMicrosoftBloomberg

Also asked at Bloomberg, Amazon, Meta, TCS, GitHub

Easy
Software Engineer

Recognize Positive Numbers with Only Three Allowed Prime Factors

Problem A positive ugly number has no prime factors outside 2, 3 and 5. Return whether n is ugly; 1 qualifies because it has no prime factors. `cpp bo...

Coding & AlgorithmsMath & Number Theory
0
0
17 people solved
Airbnb logo
Airbnb
Medium
Data Engineer Locked

Model Cumulative Booking Metrics and First and Last Booking Times

Model booking facts and cumulative summaries to report first and last bookings, with historical snapshots, late data, and dimension changes.

System DesignDimensional Modeling
7
0
54 people solved
Sep 4, 2026
Previous1...808182...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