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
  • 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
639
Companies
980
Updated
11.10.2026
639 Questions 980 Companies11.10.2026
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
Google logo
Google
Medium
Software Engineer Locked

Minimize Direction Violations in a Directed Road Network

Find a route through a directed road network that minimizes travel against the original edge directions. Model forward and reverse traversal costs cor...

Coding & AlgorithmsGraphs
71
5
509 people solved
Jul 5, 2026
Amazon logo
Amazon
Medium
Software Engineer

Design a Train Fare Calculator with Dynamic Stations and a Weekend Fare Cap

A train line serves five stations in this order: `text G → U → H → K → I ` Riding between two adjacent stations costs 1, and a trip costs the sum of t...

Software Engineering FundamentalsLow-Level Design (OOP)
2
0
21 people solved
Aug 29, 2026
Imc logo
Imc
Medium
Software Engineer Locked

Answer conceptual true/false and caching questions

This question evaluates understanding of integer representation, caching eviction policies and trade-offs (LFU vs LRU) including communication of anal...

Software Engineering FundamentalsCachingBinary Search
40
1
475 people solved
Jan 20, 2026
eBay logo
eBayMetaGoogle

Also asked at Google, Microsoft, Amazon, LinkedIn, Apple, Uber, Databricks, Waymo, Oracle

Medium
Software Engineer

Minimum Knight Steps on an Infinite Board

Problem A knight starts at (0,0) on an infinite board. Each step changes the coordinates by (±2,±1) or (±1,±2). Return the minimum steps to (x,y). The...

Coding & AlgorithmsGraphsGrids & Matrices
1
0
12 people solved
OpenAI logo
OpenAI
Medium
Software Engineer Locked

Count Machines and Recover a Distributed Tree Topology

Design a distributed tree protocol that counts machines and reconstructs all nodes and edges without a central inventory. Specify correlation-bound ag...

Software Engineering FundamentalsDistributed Transactions & IdempotencyFault Tolerance & Failover
41
0
486 people solved
Jul 3, 2026
Google logo
GoogleAmazonUber

Also asked at Uber, Meta, Microsoft, Intuit

Medium
Software Engineer

Find the Maximum Safeness of a Grid Path

Find the Maximum Safeness of a Grid Path You are given a 0-indexed n x n matrix grid. A cell contains a thief when its value is 1 and is empty when it...

Coding & AlgorithmsGrids & MatricesGraphs
0
0
9 people solved
Google logo
GoogleAmazonMicrosoftSprinklr

Also asked at Microsoft, Sprinklr

Medium
Software Engineer

Shortest Directed Routes With Alternating Edge Colors

Problem A directed graph on nodes 0 through n-1 has redEdges and blueEdges. Self-loops and parallel edges are allowed. For every node, return the smal...

Coding & AlgorithmsGraphsStacks & Queues
1
0
13 people solved
C3 AI logo
C3 AI
Medium
Software EngineerNew Grad

Maximum-Sum Star with at Most K Arms

Given a simple undirected graph with an integer value on each node and an integer k, return the largest node-value sum of any nonempty star subgraph w...

Coding & AlgorithmsGraphsGreedy
5
0
64 people solved
Jan 23, 2026
Google logo
Google
Hard
Software Engineer AI Locked

Solve checksum and dependency debugging tasks

This question evaluates skills in string processing, modular arithmetic-based checksum computation and mapping, plus debugging of feature enablement l...

Coding & AlgorithmsGraphsArrays & Strings
32
0
283 people solved
Apr 4, 2026
Amazon logo
Amazon
Medium
Software Engineer

Build a BFS Web Crawler

Implement a web crawler for a single website. You are given: - A starting URL startUrl - A function fetch(url) that returns the HTML content of a page...

Coding & AlgorithmsGraphs
57
0
443 people solved
Mar 12, 2026
Anthropic logo
Anthropic
Medium
Software Engineer

Design a single- and multi-threaded web crawler

Web Crawler (single-threaded, then multi-threaded) You are given: - A starting URL startUrl (e.g., "http://news.example.com/a/index.html"). - An inter...

Coding & AlgorithmsGraphsConcurrency
100
0
804 people solved
Oct 26, 2025
Amazon logo
AmazonGoogleBloomberg

Also asked at Bloomberg, Meta, Microsoft, Uber

Medium
Software Engineer

Find Vertices from Which Every Walk Terminates

Problem In the directed graph, a terminal vertex has no outgoing edges. A vertex is safe when every path starting there eventually terminates instead ...

Coding & AlgorithmsGraphs
0
0
12 people solved
Uber logo
Uber
Medium
Software Engineer

Model user-to-resource access permissions in a graph database and migrate to it

Design how to store which people can access which resources in a graph database, and how to answer access questions from it. The access data currently...

System DesignAuthentication & AuthorizationStorage & Sharding
1
0
33 people solved
Jul 25, 2026
Google logo
Google
Medium
Software Engineer

Find a Root for a Three-Color Binary Tree

Find a Root for a Three-Color Binary Tree You are given an undirected tree with nodes labeled 0 through n - 1, its edge list edges, and a string color...

Coding & AlgorithmsTreesGraphs
1
0
10 people solved
Microsoft logo
MicrosoftUberSalesforce

Also asked at Salesforce, Amazon, PhonePe, Meesho, MathWorks, Google, Oracle, PayPal, Cashfree

Hard
Software Engineer

Find Each Node’s Minimum Reversals to Reach the Whole Tree

Find Each Node’s Minimum Reversals to Reach the Whole Tree A simple directed graph has n nodes labeled from 0 through n - 1. If its edges were made bi...

Coding & AlgorithmsTreesDynamic Programming
0
0
8 people solved
Visa logo
Visa
Medium
Software Engineer

Minimum Travel Cost Between Array Indices

Minimum Travel Cost Between Array Indices You are given a strictly increasing integer array nums and a list of independent queries queries. For an ind...

Coding & AlgorithmsArrays & StringsGraphs
0
0
11 people solved
Netflix logo
Netflix
Medium
Software Engineer

Return valid task order from prerequisites

You are given N tasks labeled 0..N-1 and a list of directed dependency pairs [(a,b), ...] meaning task a must be done before task b. 1) Return one val...

Coding & AlgorithmsGraphs
15
0
208 people solved
Jan 30, 2026
Amazon logo
AmazonMetaGoogle

Also asked at Google, Microsoft, Bloomberg

Easy
Software Engineer

Reachability Between Two Graph Vertices

Problem An undirected graph has vertices 0 through n-1, no self-edges and no duplicate edges. Return whether there is a path from source to destinatio...

Coding & AlgorithmsGraphs
1
0
10 people solved
Apple logo
Apple
Medium
Software Engineer

Capture Enclosed O Regions in an X/O Grid Using Union-Find Instead of Flood Fill

You are given an m × n board in which every cell is 'X' or 'O'. Two 'O' cells are connected when they share an edge (up, down, left or right), and a r...

Coding & AlgorithmsGraphsGrids & Matrices
1
0
21 people solved
Jul 3, 2026
Microsoft logo
Microsoft
Medium
Data Scientist

Traverse an Org Chart by Level

You are given an organization's reporting structure as a flat list of employee-manager relationships. Exactly one employee is the root (the CEO) and h...

Coding & AlgorithmsTreesStacks & Queues
27
1
243 people solved
Feb 25, 2026
Previous1...141516...32Next
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