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
Roblox logo
Roblox
Easy
Machine Learning Engineer

Extend counter to per-client rate limiting

You are extending the recent-requests counter to support per-client rate limiting. Each request now includes a clientId identifying the caller. You mu...

Coding & AlgorithmsData Structure DesignTwo Pointers & Sliding Window
10
0
188 people solved
Dec 8, 2025
Meta logo
Meta
Medium
Data Scientist

Assess ranking change and design experiment

A multi-account product currently orders a user's accounts by most recent visit. The product team wants to change the ranking so that accounts with th...

Analytics & Experimentation
5
0
78 people solved
Jan 21, 2026
Snapchat logo
Snapchat
Medium
Machine Learning Engineer

Design short-video retrieval with sparse text

You are designing the candidate-generation (retrieval) and recommendation system for a short-video app. Constraints and setting: - Users can search wi...

ML System Design
16
0
116 people solved
Feb 3, 2026
DoorDash logo
DoorDash
Hard
Data Scientist

Design experiments for marketplace product changes

You are interviewing for a Data Scientist role at a food-delivery marketplace such as DoorDash. For each scenario below, explain how you would evaluat...

Analytics & ExperimentationExperiment Design (A/B Testing)Experiment Analysis & Readout
15
0
261 people solved
Feb 9, 2026
ByteDance logo
ByteDance
Medium
Data Scientist

Compare SQL counts, windows, and NULL semantics

You’re given two tables. users(id INT, country STRING, created_at DATE) rows: 1 | US | 2025-08-28 2 | US | 2025-08-30 3 | IN | 2025-08-29 4 | BR | 202...

Data Manipulation (SQL/Python)SQL
12
0
111 people solved
Oct 13, 2025
ByteDance logo
ByteDanceAmazonGoogle

Also asked at Google, Microsoft, TikTok, Meta, Bloomberg, Oracle, Salesforce, Millennium

Hard
Software Engineer Locked

Count Target-Sum Paths in an N-ary Tree

This question evaluates a candidate's competency in tree data structures and traversal algorithms, specifically counting path sums in N-ary trees and ...

Coding & Algorithms
4
0
33 people solved
Microsoft logo
Microsoft
Medium
Machine Learning Engineer Locked

Design quality checks for spreadsheet LLM data

This question evaluates a candidate's competency in designing data-quality validation pipelines and in assessing the need for fine-tuning of pretraine...

ML System Design
6
0
96 people solved
Mar 10, 2026
Google logo
Google
Easy
Software Engineer

Weighted Word Mapping in Reverse Alphabet Order

Problem You are given lowercase English words in words and 26 positive integer letter weights. weights[0] belongs to a, weights[1] to b, and so on thr...

Coding & AlgorithmsArrays & StringsMath & Number Theory
0
0
8 people solved
OpenAI logo
OpenAI
Medium
Data Scientist

Design Schema and Logic for Subscription Event Tracking

user_subscription_events +----------+-------------+---------------------+-----------+---------+ | user_id | event_type | event_time | plan_...

Data Manipulation (SQL/Python)
81
0
230 people solved
Jul 12, 2025
Two Sigma logo
Two Sigma
Hard
Data ScientistIntern Locked

Merge two sorted linked lists

This question evaluates proficiency with linked list data structures, pointer manipulation, in-place merging concepts, and algorithmic efficiency with...

Coding & Algorithms
7
0
94 people solved
Apr 2, 2026
Bloomberg logo
BloombergMicrosoftAmazon
Easy
Software Engineer

Smallest Absent Positive Multiple

Problem You are given an integer array nums and a positive integer k. Return the smallest positive integer divisible by k that does not appear in nums...

Coding & AlgorithmsArrays & StringsMath & Number Theory
0
0
6 people solved
Balyasny logo
Balyasny
Hard
Software Engineer Locked

Return the Minimum in Each Sliding Window

Return the minimum value in every fixed-size sliding window, including duplicate minima, negative values, and boundary window sizes.

Coding & AlgorithmsStacks & QueuesTwo Pointers & Sliding Window
4
1
35 people solved
May 25, 2026
Hive.Ai logo
Hive.Ai
Easy
Software EngineerSenior+ Locked

Design a Synchronous Text Classification API

Design a synchronous text-classification API with a small stateless online path and versioned model artifacts. Cover authentication, validation, load ...

ML System Design
2
0
21 people solved
May 17, 2026
Palo Alto Networks logo
Palo Alto Networks
Easy
Software Engineer

Implement three whiteboard coding tasks

The interview report described several coding questions in the same category: 1. Binary search: Given a sorted array of integers and a target value, r...

Coding & Algorithms
10
1
107 people solved
Jan 30, 2026
Mistral AI logo
Mistral AI
Medium
Product Manager

Explain a Difficult Product Call and the Evidence You Used to Justify It

Walk me through a difficult product decision you owned. Why was it hard, what evidence and reasoning did you use to support it, and what happened as a...

Behavioral & LeadershipAmbiguity & Decision Making
0
0
9 people solved
Jun 9, 2026
Uber logo
Uber
Medium
Data Scientist

How to evaluate lowering ETA?

Uber wants to estimate the business value of reducing ETA, where ETA is the predicted time from when a rider requests a trip until the driver arrives ...

Analytics & ExperimentationMetrics & KPIsCausal Inference
22
0
148 people solved
Feb 1, 2026
Uber logo
Uber
Hard
Software Engineer

Smallest Palindromic Number Strictly Greater Than n, Up to 18 Digits

Given a positive integer n written as a decimal string, return the smallest integer that is strictly greater than n and is a palindrome, meaning its d...

Coding & AlgorithmsMath & Number TheoryArrays & Strings
5
0
51 people solved
Jun 29, 2026
Intuit logo
Intuit
Medium
Product Manager

Getting More Small Businesses onto QuickBooks: Funnel and Product Plan

You are a product manager at Intuit, and your goal is to get QuickBooks used more widely. How would you raise its adoption rate? `hint Define adoption...

Product Design & StrategyGrowth & MonetizationUser Behavior & Funnels
1
0
11 people solved
Mar 6, 2026
Amazon logo
Amazon
Hard
Software EngineerSenior+

Return the Vertical Traversal of a Binary Tree

Return the Vertical Traversal of a Binary Tree Problem Implement verticalTraversal(nodeValues, left, right, root) -> columns. Node root is at row 0, c...

Coding & Algorithms
6
0
64 people solved
Jan 1, 2026
Apple logo
AppleMetaBloomberg
Medium
Software Engineer

Sum the Bit Differences across All Array Pairs

Sum the Bit Differences across All Array Pairs The Hamming distance between two nonnegative integers is the number of bit positions at which their bin...

Coding & AlgorithmsBit ManipulationMath & Number Theory
0
0
7 people solved
Previous1...377378379...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