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Tech Interview Questions

Practice the exact questions companies are asking right now.

Questions
12.1k
Companies
579
Updated
10.10.2026
12.1k Questions 579 Companies10.10.2026
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
Salesforce logo
Salesforce
Medium
Software Engineer

Solve array duplicate flags and binary swaps

Problem 1: Flag duplicates on the left and right You are given an integer array nums of length n. For each index i, determine: 1. Left-duplicate: whet...

Coding & AlgorithmsArrays & StringsDynamic Programming
33
1
236 people solved
Dec 17, 2025
Sig logo
Sig
Easy
Data Scientist

Count Grid Paths with No Three Equal Moves

Count Grid Paths with No Three Equal Moves A frog moves from (0, 0) to (5, 5). Every step is either one unit right or one unit up. The frog refuses to...

Statistics & Math
4
0
32 people solved
Aug 16, 2026
Together logo
Together
Medium
Software Engineer

Design a Task Scheduler Across Multiple Compute Clusters

Design a task scheduling system that assigns many tasks to multiple compute clusters and tracks each task through completion. Requirements and Constra...

System DesignJob Scheduling & WorkflowsDistributed Coordination
2
0
19 people solved
Apr 19, 2026
Snapchat logo
Snapchat
Medium
Software Engineer

Radar Overlaps and Undetected Crossing of a Rectangular Room

Radars are installed inside a rectangular room bounded by four walls: the left wall x = 0, the right wall x = width, the bottom wall y = 0 and the top...

Coding & AlgorithmsGraphs
1
0
12 people solved
Jul 1, 2026
J.P. Morgan logo
J.P. Morgan
Medium
Software Engineer II Locked

Return the K Largest Integers

Return the k largest integers in deterministic descending order while preserving duplicates and avoiding a full-array sort when k is much smaller than...

Coding & Algorithms
2
0
41 people solved
Aug 8, 2026
Rippling logo
Rippling
Medium
Software Engineer

Design a personalized news aggregator

Design a Google News-style personalized news aggregator. The system continuously collects articles from many third-party publishers by polling their A...

System DesignSearch & Feed Systems
38
1
608 people solved
Apr 19, 2026
Atlassian logo
Atlassian
Medium
Software Engineer

Find LCA in organization tree

Find LCA in organization tree Given an organizational hierarchy tree, return the lowest common organization (parent node) for two or more employees (≥...

Coding & AlgorithmsTreesTesting & Quality
24
1
170 people solved
Aug 4, 2025
Apple logo
Apple
Medium
Software Engineer Locked

Design Cross-Device Wallpaper Synchronization

Design cross-device wallpaper synchronization that applies local changes immediately and remote changes eventually despite offline devices and concurr...

System Design
3
0
32 people solved
Jun 3, 2026
Nextdoor logo
Nextdoor
Medium
Machine Learning EngineerNew Grad

Build Ranked Feed With Photo Batching

You are given a list of feed objects. Each object has: - id: a unique string - type: one of Normal, Video, or Photo - score: a numeric ranking score C...

Coding & Algorithms
4
0
61 people solved
Apr 5, 2026
Ramp logo
Ramp
Medium
Frontend Engineer

Build a React Word-Guessing Game with Green, Yellow, and Red Letter Feedback

Build a small word-guessing game as a front-end project using React, written in JavaScript or TypeScript. The game has a fixed target word. Each time ...

Software Engineering FundamentalsReact & UI FrameworksArrays & Strings
2
0
36 people solved
Jan 28, 2026
Upstart logo
Upstart
Medium
Software Engineer Locked

Count Words in Lexicographic Order

Count repeated lowercase words and return the distinct words with their frequencies in lexicographic order. Preserve the input while analyzing large c...

Coding & Algorithms
7
0
62 people solved
Jul 27, 2026
Duolingo logo
Duolingo
Medium
Software Engineer

Design an Animal Chess OOP simulation

Design and implement a simplified Animal Chess (Dou Shou Qi) game using object-oriented principles. Include: 1) Piece classes Elephant, Lion, Tiger, L...

Coding & AlgorithmsLow-Level Design (OOP)Simulation & State Machines
25
0
178 people solved
Jul 31, 2025
Robinhood logo
Robinhood
Medium
Software Engineer

Implement Calendar Layout and String Packing

The interview reportedly included two separate coding exercises: 1. Day-view calendar layout - You are given a list of events for a single day. Eac...

Coding & AlgorithmsGreedyIntervals & Scheduling
6
0
112 people solved
Mar 16, 2026
OpenAI logo
OpenAI
Medium
Machine Learning Engineer

Train and analyze a classifier

You are given a labeled dataset for binary classification. Implement an end-to-end Python solution that trains a classifier and analyzes it to a produ...

Data Manipulation (SQL/Python)ML FundamentalsModel Evaluation
35
0
690 people solved
Jul 31, 2025
OpenAI logo
OpenAI
Medium
Data Scientist Locked

Implement NumPy neural-network layers

This question evaluates competency in implementing neural-network layers and array algebra in NumPy, including matrix multiplication, broadcasting rul...

Machine LearningML CodingDebugging
52
0
431 people solved
Feb 18, 2026
Vanta logo
Vanta
Easy
Software Engineer Locked

Implement a Unique Lines Command

This question evaluates mastery of file I/O, streaming algorithms, stateful line processing, and memory-efficient handling of large inputs, situating ...

Coding & Algorithms
12
1
112 people solved
May 25, 2026
OpenAI logo
OpenAI
Hard
Software Engineer Locked

Design a Distributed Crossword Solver

This question evaluates proficiency in constraint-solving algorithms and distributed system architecture, including data representation, efficient sea...

System DesignSystem Design FundamentalsBacktracking & Recursion
30
0
436 people solved
Apr 7, 2026
Decagon logo
Decagon
Medium
Software Engineer Locked

Implement CSAT tracking and call timing

This question evaluates skills in designing efficient streaming/rolling-window data structures and stateful updates for real-time metrics, alongside p...

Coding & AlgorithmsData Structure DesignStacks & Queues
21
0
219 people solved
Jan 11, 2026
Instacart logo
Instacart
Medium
Software Engineer

Implement bus route simulation features

Bus Route Simulation – Boarding, Capacity, and Priority Passes You are given a partially implemented codebase for simulating bus routes in a city. Bus...

Coding & AlgorithmsSimulation & State Machines
71
0
511 people solved
Oct 31, 2025
OpenAI logo
OpenAI
Medium
Software Engineer

Design a chatbot (system design)

Question Design an AI chatbot system with a front-end focus, under the following hard constraints: 1. User messages and conversation history are store...

ML System DesignReal-Time SystemsAuthentication & Authorization
27
0
405 people solved
Aug 4, 2025
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