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
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
Yelp logo
Yelp
Easy
Data Scientist Locked

Estimate Experiment Duration with Power Analysis

Estimate A/B test sample size and duration for a binary metric. Connect alpha, power, baseline rate, and minimum detectable effect to traffic, trigger...

Analytics & Experimentation
2
0
24 people solved
Aug 27, 2026
xAI logo
xAI
Medium
Frontend Engineer Locked

Walk Through a Past Frontend Project: Problems Solved and Tech Stack Choices

A behavioral question from a project and product management round for a frontend role: describe a problem you hit on a past project and how you solved...

Behavioral & LeadershipProject Deep Dive
2
0
26 people solved
Sep 5, 2026
Tesla logo
TeslaZomatoGoogle

Also asked at Google, Amazon, Bloomberg, Microsoft, Meta, Meesho, CoinDCX

Medium
Software Engineer

Exchange Neighboring Seat Assignments in the Result

Problem Return the Seat assignment after exchanging each consecutive pair of students: seats 1 and 2, then 3 and 4, and so on. If the student count is...

Data Manipulation (SQL/Python)SQL
1
0
9 people solved
OpenAI logo
OpenAI
Medium
Machine Learning Engineer

Design a Resumable Iterator with Checkpoint and Restore

Design a resumable iterator: an iterator that can serialize its current position into a compact, opaque checkpoint and later be reconstructed from tha...

Coding & Algorithms
25
0
289 people solved
Oct 18, 2025
C3 AI logo
C3 AI
Medium
Data Scientist

Longest Substring Where Every Character Appears at Least K Times

Given a string s of lowercase English letters and an integer k, implement: `text longest_repeating_substring(s: str, k: int) -> int ` Return the lengt...

Coding & Algorithms
3
0
57 people solved
Aug 9, 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
58
0
444 people solved
Mar 12, 2026
Snowflake logo
SnowflakeAmazon
Medium
Software Engineer

Highest ID Frequency After Each Update

Highest ID Frequency After Each Update Start with an empty collection of integer IDs. You are given equally sized arrays nums and freq, describing upd...

Coding & AlgorithmsTreesArrays & Strings
0
0
16 people solved
Chime logo
Chime
Easy
Software Engineer

Design load balancing, caching, and idempotent APIs

You are designing a backend service that will be deployed across multiple instances behind a load balancer. Answer the following: 1) Load balancing - ...

System DesignSystem Design FundamentalsCaching
58
0
506 people solved
Nov 13, 2025
Google logo
GoogleMetaBloomberg

Also asked at Bloomberg, Microsoft, Amazon

Easy
Software Engineer

Reverse Each Binary Row and Invert Its Bits

Problem Flip the square binary image horizontally by reversing each row, then replace 0 with 1 and 1 with 0. Return the resulting image. `cpp class So...

Coding & AlgorithmsGrids & MatricesTwo Pointers & Sliding Window
1
0
13 people solved
Ramp logo
Ramp
Medium
Software Engineer

Navigate maze via HTTP API

Question Implement a program that repeatedly calls a provided HTTP API which returns the next URL in a maze; continue following the URLs until reachin...

Coding & AlgorithmsAPI Integration & HTTP Clients
33
0
424 people solved
Jul 29, 2025
Instacart logo
Instacart
Medium
Software Engineer Locked

Specify the Lowest Price Across Percentage and Buy-X-Get-Y Discounts

Clarify percentage and buy-x-get-y pricing rules, then reason about the cheapest legal discount combination, quantity thresholds, interactions, and ro...

Software Engineering FundamentalsDynamic Programming
2
0
37 people solved
Sep 11, 2026
Pinterest logo
Pinterest
Medium
Software Engineer Locked

Design an ads event reporting system

This question evaluates a candidate's ability to design scalable, reliable event ingestion and analytics systems, testing competencies in distributed ...

System DesignAds SystemsData Ingestion & CDC
54
0
384 people solved
Jan 22, 2026
PayPal logo
PayPal
Medium
Software Engineer

Design a Payment Fraud Detection Service

Design a real-time fraud detection service for a payment platform. When a user submits a payment attempt, the platform calls your service before autho...

System DesignSystem Design FundamentalsPayments & Ledgers
16
0
142 people solved
Apr 14, 2026
Amazon logo
AmazonArcesiumMicrosoftIBM

Also asked at Microsoft, IBM

Medium
Software Engineer

Group Circular Ones with Arbitrary Swaps

Problem The first and last positions of the binary array nums are adjacent, making the array circular. In one operation, swap the values at any two di...

Coding & AlgorithmsTwo Pointers & Sliding WindowGreedy
1
0
9 people solved
Netflix logo
Netflix
Medium
Software Engineer Locked

Design a Scheduler for ML Training and Batch Inference Jobs

Design a scheduler for training, batch inference, and lower-priority evaluation jobs across shared compute resources. Model workload-specific needs, a...

System Design
5
0
80 people solved
Jun 24, 2026
Amazon logo
AmazonGoogleMicrosoft

Also asked at Microsoft, Meta, Bloomberg, Flipkart, Sprinklr, Avito, Morgan Stanley, ZS Associates, TikTok, Accenture

Medium
Software Engineer

Sum the Minimum Value of Every Contiguous Subarray

Problem For every nonempty contiguous subarray of arr, take its minimum. Return the sum of those minimums modulo 10^9+7. `cpp class Solution { public:...

Coding & AlgorithmsStacks & QueuesArrays & Strings
1
0
9 people solved
Decagon logo
Decagon
Medium
Software Engineer Locked

Design a Tic-Tac-Toe Engine

This question evaluates algorithm design and data structure competency, emphasizing state representation, time-space trade-offs, and techniques for ac...

Coding & AlgorithmsSimulation & State MachinesGrids & Matrices
30
0
235 people solved
Feb 17, 2026
Crowdstrike logo
Crowdstrike
Medium
Software EngineerSenior+

Design a Secure, Highly Available Real-Time Event Messaging Platform and Defend It

This is a take-home system design followed by a live review. You receive a written set of requirements, design a real-time event messaging system on y...

System DesignMessaging & Event-DrivenFault Tolerance & Failover
4
0
48 people solved
Jan 23, 2026
Databricks logo
Databricks
Hard
Software Engineer Locked

Convert an IP range to minimal CIDRs

This question evaluates understanding of IPv4 address encoding, binary and bitwise operations, and optimal interval covering for expressing consecutiv...

Coding & Algorithms
18
1
121 people solved
Jan 7, 2026
EliseAI logo
EliseAI
Medium
Software Engineer Locked

Analyze the Fairness of an Incremental Shuffle

Determine whether an incremental array-shuffling procedure is truly uniform and support your conclusion with a rigorous probability argument. Discuss ...

Software Engineering Fundamentals
10
0
84 people solved
Jun 10, 2026
Previous1...227228229...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