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
1.5k
Companies
980
Updated
11.12.2026
1.5k 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
Onepay logo
Onepay
Medium
Software Engineer

Debug and Extend a Device Registry: Status Validation, Active Counts, Bulk Updates

You are handed a small existing Python module that manages a registry of devices, together with its tests. The exercise has several small steps that b...

Software Engineering FundamentalsDebuggingCode Quality & Maintainability
5
0
53 people solved
Sep 17, 2026
Google logo
GoogleEPAM SystemsBloomberg

Also asked at Bloomberg, Meta, Amazon, Microsoft, Uber, Accenture

Hard
Software Engineer

Build the Shortest Palindrome by Prepending Only

Problem Add characters only in front of s to make it a palindrome. Return the shortest resulting palindrome. Preserve all existing characters and thei...

Coding & AlgorithmsString AlgorithmsArrays & Strings
0
0
13 people solved
Quora logo
Quora
Easy
Software EngineerNew Grad

Find the smallest position lit by the most street lamps

Street lamps stand along a straight street, modeled as a number line. Each lamp lights a closed stretch of the street centered on the lamp. Find the p...

Coding & AlgorithmsIntervals & SchedulingSorting
0
0
5 people solved
Nov 5, 2026
Walmart Labs logo
Walmart Labs
Hard
Software Engineer

Find the Single Repeated Value Among n + 1 Integers Drawn from 1 to n

You are given an array nums of n + 1 integers, each between 1 and n inclusive. Because there are more entries than possible values, some value must ap...

Coding & AlgorithmsLinked ListsBinary Search
2
0
36 people solved
Oct 1, 2026
LinkedIn logo
LinkedIn
Medium
Software Engineer Locked

Count the Maximum Number of Collinear Points

Find the most points on one line using exact coordinate relationships, including repeated points and vertical or horizontal lines.

Coding & AlgorithmsMath & Number Theory
6
0
111 people solved
Sep 12, 2026
Upstart logo
Upstart
Medium
Software Engineer Locked

Remove Duplicates While Preserving First-Appearance Order

Return each array value once in its original first-appearance order, using membership tracking without sorting the result.

Coding & AlgorithmsArrays & Strings
5
0
79 people solved
Sep 12, 2026
Imbue logo
Imbue
Hard
Software Engineer

Max Score of an Alternating Left-Right Walk Over a Row of Signed Cells

A row of n cells holds integer values, some of which may be negative. A token starts on the leftmost cell with a score of 0. You make at most k moves....

Coding & AlgorithmsDynamic Programming
3
0
21 people solved
Oct 6, 2026
Anthropic logo
Anthropic
Hard
Software Engineer Locked

Calculate Streaming Token Usage Costs

Implement an exact usage calculator for language-model API requests with separate input and output token prices. Normalize streaming chunk deltas and ...

Coding & AlgorithmsArrays & Strings
43
1
363 people solved
Jul 8, 2026
Uber logo
Uber
Medium
Software Engineer Locked

Return the Earliest ID Seen Exactly Once

Maintain the earliest single-visit ID with counts and queue pruning, handling permanent duplicates, empty results, and strict versus amortized constan...

Coding & AlgorithmsData Structure DesignLinked Lists
9
0
60 people solved
Aug 31, 2026
Google logo
Google
Medium
Software Engineer

Environment Variable Store with %KEY% Placeholder Substitution

Implement a small environment-variable store with template substitution. The setting is a shell startup file such as .zshrc, where a line like export ...

Software Engineering FundamentalsParsing & InterpretersTesting & Quality
5
0
50 people solved
Sep 6, 2026
Goldman Sachs logo
Goldman Sachs
Medium
Quantitative Researcher

Total Rainwater Trapped Above an Elevation Profile of Unit-Width Bars

An elevation profile is made of vertical bars of width 1 standing side by side on flat ground. After heavy rain, water collects in the dips between ba...

Coding & AlgorithmsTwo Pointers & Sliding WindowArrays & Strings
3
0
28 people solved
Sep 25, 2026
Capital One logo
Capital OneCoinbaseMeta

Also asked at Meta, HubSpot, Dropbox, Airbnb, Google, Okta, Bloomberg, Ramp, Amazon

Medium
Software Engineer

Validate Stateful Account Transactions

Problem Implement a Bank object for accounts numbered from 1 through n. The constructor receives the initial balances, with array position i holding t...

Coding & AlgorithmsData Structure DesignSimulation & State Machines
2
0
30 people solved
Akuna Capital logo
Akuna Capital
Medium
Quantitative Researcher

Count Servers With At Least k Consecutive Failed Health Checks

A fleet of servers reports health checks into one shared log. Given the log in chronological order and a threshold k, count how many servers failed at...

Coding & AlgorithmsArrays & Strings
0
0
9 people solved
Sep 28, 2026
Apple logo
AppleGoogleAmazon

Also asked at Amazon, Meta, Microsoft, Bloomberg, Visa, Salesforce, DoorDash, ByteDance, TikTok, SpaceXAI, Infosys, TCS, Morgan Stanley, Walmart Labs, Cisco

Medium
Software Engineer

Length of a Longest Shared Subsequence

Problem Return the maximum length of a sequence appearing in both text1 and text2 after deleting zero or more characters without reordering those left...

Coding & AlgorithmsDynamic ProgrammingArrays & Strings
4
0
28 people solved
LinkedIn logo
LinkedIn
Medium
Software EngineerSenior+

Maximum Product of a Contiguous Subarray With Negatives and Zeros

Given an integer array nums, return the largest product obtained by multiplying the elements of a non-empty contiguous subarray. The array can contain...

Coding & AlgorithmsDynamic Programming
5
0
42 people solved
Sep 29, 2026
Stripe logo
Stripe
Medium
Software Engineer

Generate Account Email Notifications

You are building an email notification scheduler for user accounts. You are given: 1. A list of user accounts. Each account has: - account_id - ...

Coding & AlgorithmsArrays & Strings
86
1
840 people solved
Apr 14, 2026
Amazon logo
AmazonIBMGoldman Sachs

Also asked at Goldman Sachs, Google, Bloomberg, Meta, Microsoft, Purestorage, Citadel, Salesforce, Oracle, Apple, Walmart Labs, Anduril, PayPal

Medium
Software Engineer

Count Palindrome Occurrences among Contiguous Substrings

Problem Return the number of nonempty contiguous substrings of s that read the same forward and backward. Different start/end ranges count separately ...

Coding & AlgorithmsTwo Pointers & Sliding WindowArrays & Strings
2
0
24 people solved
Robinhood logo
Robinhood
Easy
Software Engineer Locked

Find the Top Ten Words When a Book Exceeds Memory

Count top words in a large book using streaming tokenization, external aggregation, distributed recovery, and correct global top-ten selection.

System DesignBatch & Stream Processing
15
1
165 people solved
Sep 17, 2026
Amazon logo
AmazonBloombergPinterest

Also asked at Pinterest, Meta, Google, Microsoft, Two Sigma, TikTok, Zoho, ByteDance, Nielsen, Oracle, EPAM Systems

Medium
Software Engineer

Multiply Two Decimal Digit Strings

Problem You receive two decimal digit strings, left and right, representing nonnegative integers. Return their exact product in decimal notation as a ...

Coding & AlgorithmsMath & Number TheoryArrays & Strings
1
0
17 people solved
Roblox logo
Roblox
Medium
Software Engineer

Find the Earliest Matrix Match for a Digit-and-Letter Pattern

Find the Earliest Matrix Match for a Digit-and-Letter Pattern You are given an integer matrix board whose entries are digits 0..9, and a rectangular p...

Coding & AlgorithmsGrids & MatricesArrays & Strings
3
0
25 people solved
Previous1...141516...75Next
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