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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
Optiver logo
Optiver
Medium
Quantitative Trader

Reason Through an Interactive Trading Game

You are playing an interactive trading game with public information, private information available to you, and quotes from several bots. At each step,...

Statistics & MathProbabilityBayesian Statistics
8
0
110 people solved
Nov 5, 2026
Rippling logo
Rippling
Medium
Software Engineer

Design an Event Metrics Aggregation System with IP Geo Enrichment

Design a metrics aggregation system. Clients produce a large number of events, such as user clicks, across many event types. The system must take the ...

System DesignSystem Design FundamentalsBatch & Stream Processing
27
3
195 people solved
Oct 23, 2026
Google logo
Google
Medium
Software EngineerSenior+

Map Uniform Draws to Indices for Weighted Random Selection

An index of a list of positive integer weights is to be chosen at random, with each index chosen with probability proportional to its weight. In an in...

Coding & AlgorithmsBinary SearchArrays & Strings
21
0
194 people solved
Oct 24, 2026
Instacart logo
Instacart
Medium
Software Engineer

Design an Inventory System for a Grocery Delivery Service

Design an inventory system. The report gives only the topic, so settle the scope with the interviewer first. For a grocery delivery service whose shop...

System DesignSystem Design FundamentalsData Ingestion & CDC
10
0
137 people solved
Oct 30, 2026
Stripe logo
Stripe
Medium
Software EngineerNew Grad

Debug Colander Output Bugs: Stray None, Nested Lists, and Empty List Versus Null

You are given a working copy of Colander, an open-source Python library that validates and deserializes data against a declared schema, into which bug...

Software Engineering FundamentalsDebuggingProgramming Languages
79
2
618 people solved
Oct 14, 2026
Google logo
Google
Medium
Software Engineer

Implement an HTTP Router That Resolves Handlers for Paths with Named Parameters

Implement an HTTP router: the component that maps the path of an incoming request to the handler registered for it. It supports two operations: - regi...

Software Engineering FundamentalsTreesData Structure Design
48
1
590 people solved
Oct 16, 2026
Amazon logo
Amazon
Hard
Software Engineer

Check Whether Two People Are Blood Relatives in a Family Graph

A family graph records parent-child relationships between people. Write a function that decides whether two given people are blood relatives, meaning ...

Coding & AlgorithmsGraphs
10
4
160 people solved
Oct 21, 2026
Google logo
Google
Medium
Software EngineerSenior+

Most Used Meeting Room When Meetings Wait for a Free Room

A building has n meeting rooms numbered 0 to n - 1. You are given a list of meetings, each with a start time and an end time, and no two meetings have...

Coding & AlgorithmsIntervals & SchedulingHeaps & Priority Queues
25
0
171 people solved
Oct 24, 2026
Stripe logo
Stripe
Medium
Software EngineerNew Grad

Debug Three Planted Bugs in the Mako Python Template Engine

You are given a working copy of Mako, an open-source Python template engine, into which bugs have been planted. Find each bug, fix it with the smalles...

Software Engineering FundamentalsDebuggingParsing & Interpreters
56
0
675 people solved
Oct 14, 2026
Rippling logo
Rippling
Medium
Software Engineer

Add Scheduled Effective-Dated Employee Changes to an HR Backend

You are given an existing HR system: a web application with a backend API and a frontend. Its database stores each employee's current data and the emp...

Software Engineering FundamentalsSystem Design FundamentalsAPI Design
17
0
159 people solved
Oct 23, 2026
Google logo
Google
Medium
Software EngineerSenior+

Design a News Aggregator That Clusters Articles into Ranked Stories

Design a news aggregator: a service that collects articles from many news publishers, recognizes when different publishers cover the same event, ranks...

System DesignSearch & Feed SystemsData Ingestion & CDC
11
0
142 people solved
Oct 24, 2026
Microsoft logo
Microsoft
Hard
Machine Learning Engineer

Minimum Buses Between Two Stops

Given routes, source, and destination, return the minimum number of buses needed to travel from the source stop to the destination stop. Each routes[i...

Coding & AlgorithmsGraphs
11
0
89 people solved
Nov 5, 2026
Capital One logo
Capital One
Medium
Software EngineerNew Grad

Benefits of a Customer-Facing Chatbot for a Bank and Its Customers

A bank is considering a chatbot for its customers. In a case-study interview, before any code is shown, the interviewer asks high-level questions: wha...

Product Design & StrategyAI Product Management
73
0
715 people solved
Oct 2, 2026
OpenAI logo
OpenAI
Medium
Software Engineer

Design a Real-Time Trivia Battle Royale Platform with Live Spectating

Design a real-time trivia battle royale platform. Dozens to a hundred or more players join a room. Questions are released round by round, and at the e...

System DesignMultiplayer Game SystemsFault Tolerance & Failover
99
2
980 people solved
Oct 10, 2026
Google logo
GoogleAmazonMeta

Also asked at Meta, Microsoft, Bloomberg, Rippling, Infosys, Goldman Sachs, SpaceX, TCS, Zoho, eBay, Udemy, Apple, Oracle, Yandex, Cognizant, Walmart Labs, Accenture, Deshaw, Uber, Autodesk

Hard
Software Engineer

Locate the Middle Value Across Two Sorted Inputs

Problem Two integer arrays, first and second, are already sorted in nondecreasing order. Return the median of the values in their combined multiset, r...

Coding & AlgorithmsBinary Search
21
0
215 people solved
Google logo
Google
Medium
Machine Learning Engineer

Work-style and ethics judgment: customer gifts, harassment, coworker growth

This round was an online work-style assessment rather than a coding test. It had three sections: 1. Most like you and least like you: each item shows ...

Behavioral & LeadershipEthics & Responsibility
10
1
108 people solved
Oct 28, 2026
Anthropic logo
Anthropic
Medium
Software Engineer

Design a Collaborative Prompt Playground

Design a collaborative prompt playground where users work on prompts together, preserve versions, and execute selected prompt versions against a model...

System DesignReal-Time SystemsAuthentication & Authorization
107
0
813 people solved
Oct 5, 2026
Databricks logo
Databricks
Hard
Software Engineer

Path Between Two Nodes in a Preorder-Numbered Fibonacci Tree

A Fibonacci tree is a binary tree defined by its order: - The trees of order 0 and order 1 are each a single node. - For n >= 2, the tree of order n i...

Coding & AlgorithmsTrees
14
0
162 people solved
Oct 19, 2026
Databricks logo
Databricks
Hard
Software Engineer

Durable Event Writer: Concurrent Appends That Survive Crashes

Write pseudocode for a durable event writer. Many threads in one process call write(event) at the same time, and each call returns only when its event...

Software Engineering FundamentalsConcurrencyOperating Systems
7
0
151 people solved
Oct 19, 2026
Perplexity logo
Perplexity
Medium
Software Engineer

In-Memory File System with Non-Recursive mkdir and Missing-Path Handling

Implement an in-memory file system as a class. It keeps directories and files in memory and answers operations on absolute, Unix-style paths such as /...

Software Engineering FundamentalsData Structure DesignTrees
5
0
104 people solved
Oct 29, 2026
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