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
154
Companies
980
Updated
11.05.2026
154 Questions 980 Companies11.05.2026
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
NVIDIA logo
NVIDIA
Medium
Software Engineer

Implement an Aligned malloc and Matching free in C

Implement aligned_malloc in C: it allocates at least size bytes and returns a pointer whose address is a multiple of alignment. Memory obtained this w...

Software Engineering FundamentalsMemory Management
8
1
57 people solved
Oct 16, 2026
OpenAI logo
OpenAI
Hard
Software EngineerNew Grad

Count Ordered Four-Shop Road Paths That Visit One Shop of Each Type

You need to buy school supplies at four different kinds of shop: a bookshop for a workbook, a school-supply shop for glue, a sports store for a pair o...

Coding & AlgorithmsGraphs
11
0
161 people solved
Oct 3, 2026
Meta logo
Meta
Medium
Software EngineerSenior+

Maximum Character Coverage From Words With No Shared Letters

You are given a list of words and an alphabet. Choose a subset of the words such that no two chosen words share even one character. The coverage of a ...

Coding & AlgorithmsBacktracking & RecursionBit Manipulation
2
0
28 people solved
Nov 1, 2026
Visa logo
Visa
Medium
Software EngineerSenior+

Maximize Index-Weighted Array Sum When Each Element Swaps at Most Once

You are given an integer array nums. You may swap elements, choosing any two positions for each swap, but every element may take part in at most one s...

Coding & AlgorithmsDynamic ProgrammingBit Manipulation
16
0
151 people solved
Oct 2, 2026
Databricks logo
Databricks
Medium
Software Engineer

First-Match CIDR Firewall: Status of an IP Address or a Whole CIDR Block

A firewall is configured with an ordered list of rules. Each rule pairs an IPv4 pattern with an action, for example: `python rules = [("192.168.1.0/24...

Coding & AlgorithmsBit Manipulation
27
0
364 people solved
Sep 11, 2026
Headlands logo
Headlands
Hard
Software EngineerNew Grad

Choose an Offset for Compressing Clustered Integers with Outliers

Most integers in a dataset are concentrated in a narrow range, with a few outliers. Choose an offset that reduces storage, and explain how a sliding w...

Software Engineering FundamentalsTwo Pointers & Sliding WindowSorting
2
0
18 people solved
Oct 26, 2026
Microsoft logo
Microsoft
Medium
Software EngineerNew Grad

Count Subarrays Whose Product Has an Odd Divisor Count

Given an integer array arr, call a nonempty contiguous subarray special when the product of its elements has an odd number of positive divisors. Imple...

Coding & AlgorithmsMath & Number TheoryArrays & Strings
4
0
41 people solved
Oct 16, 2026
Amazon logo
Amazon
Medium
Software EngineerSenior+

Implement a Fixed-Capacity Ring Buffer in C for Firmware

Implement a fixed-capacity ring buffer (circular buffer) in C. Its storage is set up once, and the write and read positions wrap back to the start of ...

Software Engineering FundamentalsData Structure DesignConcurrency
1
0
17 people solved
Oct 31, 2026
Amazon logo
Amazon
Medium
Software EngineerSenior+

Count the Set Bits in a 32-Bit Unsigned Integer

Given a non-negative integer that fits in 32 unsigned bits, return how many of its bits are 1. Function Signature `python def count_set_bits(n: int) -...

Coding & AlgorithmsBit Manipulation
2
0
18 people solved
Oct 31, 2026
Asana logo
Asana
Medium
Software Engineer

Object-Oriented Design of a Two-Player Chess Game and Its Move Rules

Design a program that lets two people play chess against each other. The interviewer is looking for the object model: the classes, what each is respon...

Software Engineering FundamentalsLow-Level Design (OOP)Simulation & State Machines
7
1
78 people solved
Sep 10, 2026
Amazon logo
Amazon
Hard
Software Engineer

Maximize the Bitwise AND of K Elements After Spending an Increment Budget

You are given an array arr of non-negative integers, an integer k and a non-negative integer budget c. First, you may increase elements of arr. Each i...

Coding & AlgorithmsBit ManipulationGreedy
22
1
238 people solved
Sep 16, 2026
Roblox logo
Roblox
Hard
Software Engineer Locked

Count Distinct Hat Assignments and Maximize Hat Points

Count valid one-hat-per-person assignments and maximize assigned-hat points with exact counts, unique hat use, and bitmask or backtracking reasoning.

Coding & AlgorithmsDynamic ProgrammingBacktracking & Recursion
40
0
355 people solved
Sep 20, 2026
MathWorks logo
MathWorks
Medium
Software EngineerNew Grad

Optimize Repeated Mirrored XOR Updates

Repeatedly apply the following in-place operation to an array: `text arr[i % n] = arr[i % n] XOR arr[n - (i % n) - 1] ` The operation count k can be a...

Coding & AlgorithmsBit ManipulationArrays & Strings
0
1
13 people solved
Oct 30, 2026
Confluent logo
Confluent
Medium
Software Engineer

Pick Numbers Summing to a Target: Existence With Negatives, One and All Solutions

You are given a list of integers nums and an integer target. A solution is a collection of numbers taken from nums whose sum is exactly target. The or...

Software Engineering FundamentalsDynamic ProgrammingBacktracking & Recursion
5
0
90 people solved
Oct 6, 2026
Snowflake logo
Snowflake
Medium
Software Engineer

Propagate Permission Letters Through a DAG Using Each Node's Final State

A permission system is modeled as a directed acyclic graph with n nodes, numbered 0 to n - 1. Permissions are single lowercase letters. An edge [u, v]...

Coding & AlgorithmsGraphs
10
0
141 people solved
Sep 15, 2026
Visa logo
Visa
Medium
Software EngineerNew Grad Locked

Fewest Terms to Write an Integer as 1, 2 or 3 Plus Even Powers of Two

For every integer in an array, find the fewest terms that sum to it when exactly one term is 1, 2 or 3 and every other term is a power of two with an ...

Coding & AlgorithmsMath & Number Theory
15
0
152 people solved
Sep 19, 2026
Salesforce logo
Salesforce
Medium
Software EngineerSenior+ Locked

Fewest Repeat-Free Pieces After Deleting Every Copy of One Letter

A string problem: delete every occurrence of one chosen lowercase letter, then split what remains into the fewest contiguous pieces with no repeated l...

Coding & AlgorithmsGreedyArrays & Strings
13
0
94 people solved
Sep 22, 2026
J.P. Morgan logo
J.P. Morgan
Medium
Software Engineer

Choose a bit string with at most maxSet ones to maximize its XOR with x

You are given a binary string x of length bits, written with the most significant bit first, and an integer maxSet. Construct a binary string y of the...

Coding & AlgorithmsBit ManipulationGreedy
8
1
78 people solved
Oct 6, 2026
Baseten logo
Baseten
Medium
Software Engineer

XOR-based random number generator used to encrypt and decrypt a tree document

This is a two-part coding exercise. First, implement a pseudo-random number generator (PRNG) whose state update is built from bitwise XOR. Then use th...

Software Engineering FundamentalsBit ManipulationCryptography
17
0
117 people solved
Aug 4, 2026
Google logo
GoogleBloombergMicrosoft

Also asked at Microsoft, Amazon, Meta

Medium
Software Engineer

Recover a Signed Value among Threefold Repetitions

Problem Every value in nums appears exactly three times except one value that appears once. Return that value. Your solution must take linear time and...

Coding & AlgorithmsBit Manipulation
2
0
22 people solved
Previous12...8Next
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