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
IBM logo
IBM
Medium
Business Intelligence Engineer

Sum of Pairwise Modulo Checksums (i mod j + j mod i) for All Pairs up to n

A distributed network system has n data packets whose identifiers are the integers 1 through n. For two identifiers i and j, the checksum of the pair ...

Coding & AlgorithmsMath & Number Theory
0
0
4 people solved
Nov 5, 2026
Mistral AI logo
Mistral AI
Medium
Software Engineer

Compare Tensor Parallelism and Pipeline Parallelism

Compare tensor parallelism and pipeline parallelism for training or serving a transformer too large for one device. Explain what is partitioned, what ...

Machine LearningNeural Networks & TrainingLLM Inference & Serving
3
0
52 people solved
Sep 1, 2026
Mintlify logo
Mintlify
Medium
Backend EngineerSenior+

Hiring-manager screen: past work, full-stack flexibility, and why join a startup

In a 30-minute hiring-manager screen for a senior backend engineering role at a startup, the behavioral portion covers three topics: your previous wor...

Behavioral & LeadershipMotivation & FitProject Deep Dive
1
0
21 people solved
Sep 27, 2026
OpenAI logo
OpenAI
Medium
Software Engineer Locked

Implement a Distributed Rate Limiter

This question evaluates a candidate's ability to design and implement a distributed rate-limiting mechanism, testing knowledge of distributed systems,...

Coding & AlgorithmsRate LimitingConsistency & Availability
63
0
495 people solved
May 25, 2026
Infosys logo
InfosysGoogleApple

Also asked at Apple, Microsoft, Amazon, TikTok, Citadel

Medium
Software Engineer

Trade Repeatedly with a Fee per Completed Transaction

Problem Given daily prices and a fee, maximize total profit from any number of completed buy/sell transactions. Hold at most one share at a time and s...

Coding & AlgorithmsDynamic Programming
1
0
17 people solved
Capital One logo
Capital One
Hard
Machine Learning Engineer Locked

Count Pairs of Numbers That Become Equal After at Most One Digit Swap

Given a list of integers, count the index pairs whose values are equal or become equal after swapping two digits inside one of the two numbers, where ...

Coding & AlgorithmsArrays & Strings
4
0
81 people solved
Sep 3, 2026
SIG (Susquehanna) logo
SIG (Susquehanna)
Medium
Quantitative Trader

Expected Spins of an Unequal Spinner to Land in K Distinct Regions

A spinner has $N$ regions. Each spin lands in region $i$ with probability $p_i$, independently of all other spins, where $p_1 + p_2 + \dots + p_N = 1$...

Statistics & MathProbabilityDynamic Programming
3
0
36 people solved
Sep 19, 2026
Gofundme logo
Gofundme
Medium
Data Scientist

Explain an AI Agent You Built: Design, Evaluation, and Governance

Explain an AI Agent You Built: Design, Evaluation, and Governance Describe an AI-agent project you actually worked on. Explain the agent's purpose, th...

ML System DesignProject Deep DiveAI Agents
3
0
26 people solved
Sep 14, 2026
Hudson River Trading logo
Hudson River Trading
Hard
Software Engineer Locked

Wrap a Fixed-Chunk Stream Reader with Arbitrary-Length Reads

This Hudson River Trading software engineering question asks candidates to wrap a fixed-chunk stream reader with arbitrary-length reads. It is useful ...

Software Engineering FundamentalsData Structure Design
24
0
396 people solved
Jul 2, 2026
OpenAI logo
OpenAI
Hard
Software Engineer Locked

Follow Graph with Cheap Snapshots and Top-K Follow Recommendations

Build a one-directional follow graph that supports cheap snapshots and queries against past snapshots, then recommend the top k accounts a user should...

Software Engineering FundamentalsData Structure DesignGraphs
7
0
87 people solved
Sep 20, 2026
Goldman Sachs logo
Goldman Sachs
Medium
Software Engineer

Binary Tree Completeness Check, Then B-Tree Indexes and Why Not Index Every Column

This phone-screen round started with a short binary-tree coding problem and then followed the tree into database internals: B-trees, and when to add i...

Software Engineering FundamentalsIndexing & Query PerformanceDatabase Internals
3
0
26 people solved
Oct 5, 2026
Vercel logo
Vercel
Medium
Software Engineer Locked

Search Recorded Metrics by Name, Tags, and Recency

Record metrics and return the newest matches for name-and-tag searches, with explicit tag matching, timestamp ties, duplicates, and result limits.

Coding & AlgorithmsArrays & StringsSorting
10
0
160 people solved
Aug 27, 2026
Cohere logo
Cohere
Medium
Machine Learning Engineer

Design a Post-Training Pipeline to Improve a 7B Model's Coding for an Enterprise

Design the post-training process that improves the coding capabilities of a 7-billion-parameter language model for one enterprise customer. Cover the ...

ML System DesignFine-Tuning & Alignment TechniquesReinforcement Learning
7
0
73 people solved
Sep 22, 2026
Bloomberg logo
BloombergGoogleMeta

Also asked at Meta, Microsoft, Amazon, Uber, TCS, Yandex, Instacart, Whatnot, Infosys, Adobe, Accenture, Ozon, Deutsche Bank, CrowdStrike

Easy
Software Engineer

Square a Sorted Array and Return the Squares in Order

Problem Given nums in nondecreasing order, return every value squared, also in nondecreasing order. Negative values may cause squared values to appear...

Coding & AlgorithmsTwo Pointers & Sliding WindowArrays & Strings
1
0
16 people solved
Waymo logo
Waymo
Medium
Data Scientist Locked

Compare Driving Algorithms Using Hard-Braking Rates

Design an exposure-aware experiment comparing hard-braking rates across two driving algorithms, with city and road-condition controls and count-data i...

Analytics & ExperimentationExperiment Design (A/B Testing)Hypothesis Testing
40
0
291 people solved
Sep 6, 2026
Confluent logo
Confluent
Medium
Software EngineerSenior+

Document Search: Exact Word Match, Non-Adjacent Phrase Match and AND/OR Queries

You are given a collection of documents, each with an integer id and its text. Build a search component over them. The interviewer adds requirements o...

Software Engineering FundamentalsData Structure DesignParsing & Interpreters
2
0
47 people solved
Aug 29, 2026
Rippling logo
Rippling
Medium
Software Engineer Locked

Design a News Aggregation System (Google News-style)

This question assesses a candidate's ability to design a large-scale news aggregation system, covering distributed crawling, article deduplication, ev...

System DesignSearch & Feed SystemsDistributed Coordination
317
3
3522 people solved
Jun 30, 2026
Tesla logo
Tesla
Easy
Software Engineer Locked

Handle API Errors with Python Requests

Handle API failures with Python Requests by separating HTTP and JSON errors, bounding retries, honoring rate-limit delays, and preserving failure deta...

Software Engineering FundamentalsAPI Integration & HTTP ClientsDistributed Transactions & Idempotency
7
0
70 people solved
Sep 4, 2026
Anthropic logo
Anthropic
Medium
Software Engineer Locked

Review and Scale an Inference Service Design

Review a high-throughput inference design with a 100 ms batch target, explicit capacity math, overload control, and multi-model scheduling.

ML System Design
10
0
180 people solved
Aug 27, 2026
Optiver logo
Optiver
Medium
Software Engineer Locked

Design a Tiered Expiring Item Store

Design a tiered in-memory item store with deterministic placement, expiration, level-occupancy eligibility, and retrieval of the heaviest qualifying i...

Software Engineering FundamentalsData Structure DesignHeaps & Priority Queues
32
1
414 people solved
Aug 10, 2026
Previous1...828384...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