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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
Google logo
Google
Medium
Software Engineer

Last Task Finish Time with Limited CPUs and a Fixed Task Duration

Tasks are scheduled to start at given times, and every task takes the same execution time. At most max_cpus tasks can run at the same moment, one task...

Coding & AlgorithmsIntervals & SchedulingHeaps & Priority Queues
3
0
49 people solved
May 26, 2026
Amazon logo
AmazonMetaMicrosoft

Also asked at Microsoft, Google, Bloomberg, Adobe, Anduril, Salesforce, Applied Intuition, Riotgames, Acorns

Medium
Software Engineer

Advance a Binary Life Board Simultaneously In Place

Problem Apply one Game of Life generation to board. Each cell has up to eight surrounding neighbors. A live cell survives with two or three live neigh...

Coding & AlgorithmsSimulation & State Machines
1
0
12 people solved
Amazon logo
AmazonInfosysGoogle

Also asked at Google, Meta, Microsoft, Bloomberg, Apple, Accenture, Visa, Yandex, Agoda, Salesforce, TikTok, TCS, IBM, JPMorgan Chase, Goldman Sachs, Zoho, NVIDIA, Oracle, Cognizant, Sprinklr

Hard
Software Engineer

Count Inclusive-Band Sums of Nonempty Index Ranges

Problem Return the number of nonempty contiguous ranges whose sum lies between lower and upper inclusive. Count index ranges separately even when thei...

Coding & AlgorithmsSortingArrays & Strings
1
0
13 people solved
Robinhood logo
Robinhood
Medium
Backend Engineer

Explain a Conflict During Backend Delivery

Describe a conflict you encountered while delivering a project and how you handled it. Explain the competing concerns, your actions, and the outcome. ...

Behavioral & LeadershipConflict & Collaboration
0
0
9 people solved
Sep 29, 2026
OpenAI logo
OpenAI
Hard
Software Engineer Locked

Design a Multi-Tenant Cloud IDE: Isolation, Workspaces, Run/Build, Failure Modes

Design a browser-based cloud IDE where many untrusted users each get a workspace with files, a terminal and the ability to run and build code. Cover m...

System DesignSandboxing & IsolationContainers & Orchestration
11
0
84 people solved
Sep 20, 2026
Google logo
GoogleMicrosoftTCS

Also asked at TCS, EPAM Systems, Amazon, Meta, Bloomberg, Oracle, Deloitte, Apple, Zoho, Visa, Twitch

Easy
Software Engineer

Reverse Only Vowel Occurrences in an ASCII String

Problem Reverse the sequence of vowels in s while leaving every nonvowel position unchanged. Vowels are a,e,i,o,u in either case; move each vowel's ac...

Coding & AlgorithmsTwo Pointers & Sliding Window
1
0
17 people solved
Bnsf logo
Bnsf
Hard
Software EngineerSenior+ Locked

Maximize Valid Trains from Shared Equipment

Optimize a fleet of locomotives and railcars into the largest possible number of valid trains, then maximize used railcar length. Respect capacity, le...

Coding & Algorithms
18
0
160 people solved
Jul 23, 2026
Instacart logo
Instacart
Medium
Software Engineer Locked

Add Backend Search and Filters to the Items API of a Library Lending System

A full-stack software engineering exercise that extends the items API of an existing library lending system with case-insensitive title search plus it...

Software Engineering FundamentalsAPI DesignAI-Assisted Development
7
0
92 people solved
Sep 3, 2026
Databricks logo
Databricks
Medium
Software Engineer Locked

Design a Thread-Safe Buffered Writer with a Background Flush Thread

This question assesses a candidate's ability to design a concurrent, thread-safe component that decouples fast in-memory writes from slower disk I/O u...

System DesignConcurrencyData Structure Design
96
0
1117 people solved
Jun 23, 2026
Viridien logo
Viridien
Medium
Data Scientist

Count fillings of a 3x3 grid where every 2x2 block holds 1 to 4

Each cell of a 3×3 grid is filled with one of the numbers 1, 2, 3 and 4. The grid contains four 2×2 blocks of adjacent cells: top-left, top-right, bot...

Statistics & MathPuzzles & BrainteasersMath & Number Theory
0
0
4 people solved
Nov 1, 2026
Amazon logo
Amazon
Medium
Software Engineer Locked

Debug a Test-Driven C++ Project

Use a disciplined workflow to repair syntax, incomplete-function, and logic failures in a test-driven C++ project with bounded AI assistance.

Software Engineering FundamentalsDebuggingTesting & Quality
11
0
94 people solved
Aug 26, 2026
Amazon logo
Amazon
Medium
Applied ScientistSenior+ Locked

From Early NLP Embeddings to Modern LLM Embeddings

Review the evolution of NLP embeddings and learn how to compare smaller and larger modern embedding models using retrieval quality and operational cos...

Machine Learning
7
0
122 people solved
Aug 15, 2026
Amazon logo
Amazon
Medium
Software Engineer

Add One Source to Minimize Grid Inconvenience

Add One Source to Minimize Grid Inconvenience Implement min_max_inconvenience(grid). grid is a non-empty rectangular matrix containing 0 and 1. A cell...

Coding & AlgorithmsGrids & MatricesGraphs
21
0
256 people solved
Jul 9, 2026
Anthropic logo
Anthropic
Medium
Software Engineer

Implement a Banking System

Design and implement an in-memory banking system. All operations are processed in non-decreasing timestamp order. Account identifiers are strings. Mon...

Coding & AlgorithmsData Structure DesignPayments & Ledgers
43
0
360 people solved
May 24, 2026
DoorDash logo
DoorDash
Medium
Software Engineer Locked

Design a Review and Rating System for Food Delivery Menu Items

Design a review and rating system for a food-delivery platform, where customers review the individual menu items they received and every menu shows ea...

System DesignSystem Design FundamentalsAPI Design
18
0
115 people solved
Sep 7, 2026
OpenAI logo
OpenAI
Medium
Software Engineer

Implement a Simple Memory Allocator

Design and implement a simplified memory allocator exposing malloc(size) and free(ptr) over a single fixed-size heap (a contiguous byte array). The al...

Software Engineering FundamentalsMemory ManagementData Structure Design
74
0
767 people solved
May 29, 2026
Epic Systems logo
Epic SystemsGoogle
Medium
Software Engineer

Recognize a Complete Additive Digit Partition

Problem Return whether num can be split into at least three decimal numbers such that every number after the first two equals their sum. Use the entir...

Coding & AlgorithmsBacktracking & RecursionMath & Number Theory
1
0
14 people solved
Databricks logo
Databricks
Medium
Software EngineerSenior+ Locked

Design an Online Book Seller Platform

Design a service for browsing and searching books, managing inventory, placing orders, taking payments, and tracking order state. Connect requirements...

System DesignSystem Design FundamentalsDistributed Transactions & Idempotency
25
0
409 people solved
Jul 30, 2026
Meta logo
Meta
Medium
Software Engineer

Design 24-Hour Ephemeral Stories for a Photo and Video Sharing App

Design the stories feature of a photo- and video-sharing app. Users post photos or short videos as stories that their followers can view for 24 hours,...

System DesignSearch & Feed SystemsCaching
6
0
55 people solved
Sep 14, 2026
Palantir logo
Palantir
Easy
Software Engineer

Find Shortest Paths in Road Network

You are reviewing code for a road-network graph. The domain objects are: `java class Location { String name; Location(String name) { this.name...

Coding & Algorithms
42
0
357 people solved
Mar 8, 2026
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