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
Pinterest logo
Pinterest
Medium
Software Engineer Locked

Design a Multi-Channel Notification System

Design a multi-channel notification platform for push, email, SMS, and in-app messages that respects consent, preferences, quiet hours, locale, priori...

System DesignMessaging & Event-DrivenDistributed Transactions & Idempotency
54
0
368 people solved
Jul 2, 2026
Capital One logo
Capital One
Medium
Software EngineerSenior+

Place Pieces on a Grid

Given integers n and m, and an ordered list figures where each element is one of "A", "B", "C", "D", or "E", construct an n x m integer matrix grid. T...

Coding & AlgorithmsSimulation & State Machines
17
0
218 people solved
Feb 8, 2026
Rippling logo
Rippling
Medium
Software Engineer Locked

Answer Hiring Manager Behavioral Questions

This question assesses a software engineer's behavioral competencies across three dimensions: technical depth, interpersonal conflict resolution, and ...

Behavioral & LeadershipProject Deep DiveConflict & Collaboration
49
0
363 people solved
May 30, 2026
Intuit logo
Intuit
Easy
Software Engineer

Validate bracket sequence

Given a string s containing only the characters (, ), [, ], {, and }, determine whether the brackets are properly matched. A string is valid if: - Eve...

Coding & Algorithms
15
0
110 people solved
Apr 2, 2026
Microsoft logo
MicrosoftGoogleMeta

Also asked at Meta, Amazon, Bloomberg

Medium
Software Engineer

Aggregate Monthly Transaction Totals and Approved Totals

Problem For each calendar month and country, report month, country, trans_count, approved_count, trans_total_amount and approved_total_amount. Month u...

Data Manipulation (SQL/Python)SQL
0
0
6 people solved
Stripe logo
Stripe
Medium
Data Scientist

Write SQL to monitor weekly chargeback spikes

Write a single SQL query (PostgreSQL) to detect weekly chargeback spikes by country and industry. Week starts Monday (use date_trunc('week', ts) with ...

Data Manipulation (SQL/Python)
4
0
68 people solved
Oct 13, 2025
Anthropic logo
Anthropic
Medium
Machine Learning Engineer

Convert stack samples to execution trace

You are given sampling-profiler output: a list of Sample objects ordered by timestamp ascending. Each Sample has (t: float, stack: list[str]) where st...

Coding & AlgorithmsStacks & Queues
74
0
1206 people solved
Sep 6, 2025
Rippling logo
Rippling
Medium
Software Engineer

Design a scalable logging system

Design a centralized logging system for a large organization — an internal observability platform (think a self-hosted Splunk / Datadog Logs / ELK) th...

System DesignObservabilityMessaging & Event-Driven
95
0
923 people solved
Jan 16, 2026
Canva logo
Canva
Easy
Software EngineerSenior+

Design an Online Bookshop with a Focus on Payments and Database Design

Design an online bookshop. Customers browse and search a catalog of books, add books to a cart, check out and pay, and later look up their orders. The...

System DesignPayments & LedgersDistributed Transactions & Idempotency
0
0
8 people solved
Jul 12, 2026
Google logo
GoogleAmazonBloomberg

Also asked at Bloomberg, Zopsmart, Meta, Flexport

Medium
Software Engineer

Count Position Matches and Remaining Digit Matches

Problem Return a Bulls and Cows hint for secret and guess. Bulls are equal digits at equal positions. Cows are the remaining guess digits that can mat...

Coding & AlgorithmsArrays & Strings
1
0
15 people solved
Goldman Sachs logo
Goldman Sachs
Easy
Data ScientistIntern Locked

Maximize Covariance from Known Variances

Determine the maximum possible covariance when two random variables have variances 3 and 27.

Statistics & Math
6
0
50 people solved
Sep 2, 2026
Squarepoint logo
Squarepoint
Medium
Software Engineer Locked

Use find, ps, top, and kill Safely on Linux

Use Linux find, ps, top, and kill to investigate an application consuming unexpected resources. Show how to gather evidence, identify the exact proces...

Software Engineering Fundamentals
15
0
153 people solved
Jul 12, 2026
Waymo logo
Waymo
Medium
Software Engineer

Behavioral: Handling a Conflict, Feedback, and On-Call Incidents

This behavioral round asks three separate questions: one about a conflict at work, one about feedback, and one about whether you have on-call experien...

Behavioral & LeadershipConflict & CollaborationReliability & SRE
2
0
36 people solved
Apr 14, 2026
Google logo
GoogleAmazonTCS

Also asked at TCS, Robinhood, Box, Meta, Bloomberg, Microsoft, Adobe, Oracle, PayPal, Palo Alto Networks, Salesforce, Redfin

Medium
Software Engineer

Find top/bottom-k words in list or stream

You are given words (strings) either as a finite list or as an unbounded stream. 1) List version: Given an array words and an integer k, return: - the...

Coding & AlgorithmsHeaps & Priority QueuesBatch & Stream Processing
24
1
263 people solved
Two Sigma logo
Two Sigma
Hard
Data ScientistIntern Locked

Why use the t-statistic?

This question evaluates understanding of the t-statistic as a standardized test measure connecting effect size, variance, and sample size, and probes ...

Statistics & MathHypothesis TestingSampling & Estimation
20
0
175 people solved
Apr 2, 2026
Remitly logo
Remitly
Medium
Software Engineer

Design an Elevator System and Scheduler

Design an object-oriented elevator system. Define core classes and interfaces (elevator, controller, request, floor, buttons, sensors) and their inter...

Coding & AlgorithmsLow-Level Design (OOP)Stacks & Queues
51
0
359 people solved
Aug 13, 2025
Chime logo
Chime
Medium
Software Engineer

Find missing number from concatenated digits

Given an integer n (1 ≤ n ≤ 99) and a digit string s formed by concatenating the decimal representations of the integers 1..n except for one missing n...

Coding & AlgorithmsArrays & StringsMath & Number Theory
82
1
554 people solved
Jul 27, 2025
Stripe logo
Stripe
Easy
Data Scientist

Match payments to invoices by memo or amount

Scenario You are building a small reconciliation tool that matches payments to invoices. Data structures Assume you are given: - invoices: a list of i...

Coding & AlgorithmsData Cleaning & WranglingArrays & Strings
35
0
249 people solved
Oct 25, 2025
Apple logo
Apple
Medium
Software Engineer

Defend a Distributed-System Architecture in a Deep Dive

Present a distributed-system project you led and explain its throughput bottlenecks, failure isolation, consistency under concurrency, and observabili...

Behavioral & LeadershipProject Deep DiveConsistency & Availability
1
0
11 people solved
Jul 25, 2026
Anthropic logo
Anthropic
Medium
Software Engineer Locked

Word Search in a Letter Grid

This question evaluates a candidate's ability to search for multiple target words within a grid of letters using depth-first traversal and backtrackin...

Coding & Algorithms
6
0
115 people solved
Jun 23, 2026
Previous1...236237238...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