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
Mercor logo
Mercor
Medium
Machine Learning Engineer

Design Candidate Search And LLM Evaluation Tasks

Prepare for an MLE onsite with three themes: finding top candidates from a job description, reasoning about an unreliable deterministic comparator, an...

ML System DesignRetrieval & Candidate GenerationRanking Models
40
0
364 people solved
Apr 21, 2026
Google logo
Google
Hard
Data Scientist Locked

Compute Company Suggestion Funnels

This question evaluates a candidate's ability to perform event-level funnel analysis including distinct aggregation, joins to a dimension table, time-...

Data Manipulation (SQL/Python)SQLUser Behavior & Funnels
11
1
148 people solved
May 18, 2026
Stripe logo
Stripe
Medium
Software Engineer Locked

Design an Idempotent Double-Entry Ledger

Design an idempotent double-entry ledger for financial requests retried over unreliable networks. Address immutable postings, balanced currencies, con...

System DesignPayments & LedgersDistributed Transactions & Idempotency
23
0
324 people solved
Jun 16, 2026
Karat logo
Karat
Medium
Software Engineer

Validate password and list rule violations

Problem You are given a password string p. Validate it against a set of rules and return all rules that the password violates. Rules 1. Length must be...

Coding & AlgorithmsArrays & Strings
23
0
386 people solved
Jan 22, 2026
LinkedIn logo
LinkedIn
Easy
Data ScientistSenior+

Count Members Flagged for Three Violations in 90 Days, Overall and by Violation Type

A trust-and-safety team logs every harmful-content violation committed by a member. It is comparing two rules for flagging repeat violators and wants ...

Data Manipulation (SQL/Python)SQL
0
0
3 people solved
Oct 25, 2026
Uber logo
Uber
Medium
Software Engineer

Count Substrings with Almost-Even Letter Counts

Problem Count the nonempty contiguous substrings of word in which no more than one letter occurs an odd number of times. The input uses only lowercase...

Coding & AlgorithmsBit ManipulationArrays & Strings
2
1
23 people solved
Arm logo
Arm
Medium
Backend EngineerIntern

Explain timing and testability concepts

For a digital implementation or backend-focused interview, explain the following concepts: 1. What are setup time and hold time? 2. How does clock ske...

Software Engineering Fundamentals
21
0
151 people solved
Mar 13, 2026
Zoom logo
Zoom
Medium
Product Manager

Zoom Metric Diagnosis: Attendees per Meeting Fall From 7 to 3 as Meeting Volume Rises

You are a product manager at Zoom. Across a single quarter, the average number of attendees per Zoom meeting fell from 7 to 3, while the total number ...

Analytics & ExperimentationMetric DiagnosticsSegmentation & Cohort Analysis
1
0
11 people solved
Oct 16, 2026
LinkedIn logo
LinkedIn
Medium
Software Engineer Locked

Check Whether a String Is a Signed Decimal Number Without Exponent Notation

Write a function that decides whether a string is a valid plain decimal number with an optional sign and fractional part, rejecting exponents, stray s...

Coding & AlgorithmsParsing & Interpreters
7
0
84 people solved
Sep 6, 2026
Langchain logo
Langchain
Medium
Software EngineerSenior+ Locked

Optimize Object-Backed APIs and Design an LLM Observability Platform

A two-part system-design interview about reducing latency in object-backed JSON APIs and building an LLM observability platform. It emphasizes measure...

System Design
6
0
106 people solved
Jun 12, 2026
TikTok logo
TikTok
Medium
Product Manager

TikTok Creator Strategy: Evaluating a Bet on Co-Creation Features

You are a product manager at TikTok. Leadership is deciding whether to put resources into tools that make it easier for creators to produce content to...

Product Design & StrategyProduct StrategyExperiment Design (A/B Testing)
1
0
16 people solved
Sep 4, 2026
CVS Health logo
CVS Health
Easy
Software EngineerSenior+

Implement a Thread-Safe Singleton in Java

Explain the Singleton pattern and show how to implement a thread-safe singleton in Java. Then explain how you would ensure thread safety for operation...

Software Engineering FundamentalsConcurrencyLow-Level Design (OOP)
0
0
12 people solved
Jul 25, 2026
Amazon logo
AmazonGoogleBloomberg

Also asked at Bloomberg, Meta, TikTok, Microsoft, Snowflake, LinkedIn, DoorDash, Oracle, Goldman Sachs, Zoho, Apple

Medium
Software EngineerNew Grad

Find the Maximum Island Area

Given a two-dimensional binary matrix, return the maximum area of any island. An island is a connected component of cells containing 1, using only up,...

Coding & AlgorithmsGrids & Matrices
5
0
62 people solved
Google logo
Google
Medium
Software Engineer Locked

Solve Three Array and Matrix Path Problems

This set of three problems evaluates algorithm design, complexity analysis, and data-structure reasoning across matrix path traversal, interval covera...

Coding & AlgorithmsGrids & MatricesDynamic Programming
24
3
302 people solved
May 30, 2026
Revolut logo
Revolut
Medium
Product Manager

Revolut Recruiting Funnel: Diagnose Hiring Bottlenecks and Prioritize Process Fixes

You are interviewing for a product manager role at Revolut. Treat the company's own hiring process as your product: how would you make it work better?...

Product / Decision MakingProduct Design & ImprovementUser Behavior & Funnels
0
0
12 people solved
Aug 11, 2026
Rippling logo
Rippling
Hard
Software Engineer

Design a scalable expense rules engine

Design a Rules Engine for Corporate Credit-Card Expense Review Context We offer a corporate credit card that employees use for business expenses. Mana...

System DesignLow-Level Design (OOP)API Design
341
2
2899 people solved
Sep 6, 2025
Google logo
Google
Medium
Software Engineer Locked

Resolve Product Disagreement and Balance Technical Debt

Resolve a disagreement with a product manager and balance an urgent deadline against technical debt using evidence, focused repairs, and clear ownersh...

Behavioral & LeadershipConflict & CollaborationCode Quality & Maintainability
5
0
64 people solved
Aug 29, 2026
OpenAI logo
OpenAI
Medium
Software Engineer

Implement and Debug Backprop in NumPy

Two-Layer Neural Network: Backpropagation and Gradient Check (NumPy) You are implementing a fully connected two-layer neural network for multi-class c...

Machine LearningML CodingDebugging
119
1
2263 people solved
Sep 6, 2025
Google logo
GoogleAmazonBloomberg

Also asked at Bloomberg, Meta, Microsoft, TCS, Visa

Easy
Software Engineer

Recognize a Rotation of Nondecreasing Values

Problem Return whether nums can be obtained by rotating a nondecreasing array by some number of positions, including zero. Duplicate values are allowe...

Coding & AlgorithmsArrays & Strings
0
0
10 people solved
Jane Street logo
Jane Street
Medium
Software EngineerIntern

Bottom-Insertion Connect Game: Detect the First k-in-a-Row Winner

Two players, B and R, take turns dropping pieces onto a board that covers the upper half-plane of an integer grid. Columns are indexed by arbitrary in...

Coding & AlgorithmsSimulation & State Machines
43
0
634 people solved
Nov 6, 2025
Previous1...165166167...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