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Tech Interview Questions

Practice the exact questions companies are asking right now.

Questions
639
Companies
980
Updated
11.10.2026
639 Questions 980 Companies11.10.2026
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
Google logo
Google
Hard
Software Engineer

Weighted Tree: Total Distance from Each Node to All Other Nodes

An undirected tree has n nodes labeled 0 to n - 1, and every edge has a positive integer weight. The distance between two nodes is the sum of the edge...

Coding & AlgorithmsTreesDynamic Programming
72
1
1003 people solved
Oct 29, 2026
Anthropic logo
Anthropic
Hard
Software Engineer

Same-Hostname Web Crawler: Single-Threaded, Then Multithreaded

Implement a web crawler. You are given a start URL and an HTML parser that fetches a page and returns the links on it. Starting from the start URL, fi...

Software Engineering FundamentalsConcurrencyGraphs
23
1
263 people solved
Oct 26, 2026
Google logo
Google
Medium
Software Engineer

Count Islands in a Grid and Track the Count as Land Cells Are Added

A map is a grid with m rows and n columns in which every cell is land (1) or water (0). An island is a maximal group of land cells connected horizonta...

Coding & AlgorithmsGraphsGrids & Matrices
403
5
2932 people solved
Oct 2, 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
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 Engineer

Reachability Between Stations in a Timed Train Schedule

You are given a train timetable. Each train makes one trip from a departure station to an arrival station, leaving at its departure time and arriving ...

Coding & AlgorithmsGraphs
134
1
1140 people solved
Oct 6, 2026
Rippling logo
Rippling
Medium
Software Engineer

Expense Policy Rules Engine: Scale, Violation Storage and Shared Compound Rules

Build an expense rules engine. Employees submit expenses, and the engine checks every expense against a company's expense policy rules and reports the...

Software Engineering FundamentalsLow-Level Design (OOP)Graphs
17
0
111 people solved
Oct 23, 2026
OpenAI logo
OpenAI
Hard
Software Engineer

Fault-Tolerant Task Queue with Retries, a Dead-Letter Queue and Task Dependencies

Implement an in-memory, fault-tolerant task queue. Producers add tasks; workers reserve a task, process it, and then either finish it or report that i...

Software Engineering FundamentalsData Structure DesignGraphs
45
0
469 people solved
Oct 12, 2026
Shopify logo
Shopify
Medium
Software Engineer

Generate a Secret Santa Matching with Recipient Exclusions

Read participants from a CSV file, assign each person exactly one different person to give a gift to, and print the giver-to-recipient matches. Everyo...

Coding & AlgorithmsGraphsMath & Number Theory
6
0
60 people solved
Nov 5, 2026
OpenAI logo
OpenAI
Hard
Software EngineerNew Grad

Follow One-Way Links to the Endpoint Node or the Last Node Before a Loop Closes

A simple network is made of nodes joined by one-way links. Each node links to at most one other node, in a single forward direction. Starting from a g...

Coding & AlgorithmsGraphs
36
0
591 people solved
Oct 6, 2026
Databricks logo
Databricks
Hard
Software Engineer

Fastest Single-Mode Commute Across a Grid of Mode-Restricted Blocks

A city map is a grid of blocks. You must commute from your start block to your destination block using exactly one transport mode for the whole trip, ...

Coding & AlgorithmsGrids & MatricesGraphs
12
1
111 people solved
Oct 19, 2026
Stripe logo
Stripe
Medium
Software Engineer

Parse Parent-Child Task Records and Render Them as a Connector Tree

You receive a list of task records and must rebuild the hierarchy of tasks and subtasks they describe, then print it as a text tree. The specification...

Software Engineering FundamentalsTrees
118
3
1824 people solved
Sep 30, 2026
OpenAI logo
OpenAI
Hard
Machine Learning Engineer Locked

Hand-Written Gradients: Prefix-Product Backward Pass and Stable Cross-Entropy

Write gradients by hand: the forward and backward pass of the prefix-product operation, in linear time and without division so inputs may contain zero...

Machine LearningML CodingArrays & Strings
135
0
1000 people solved
Sep 20, 2026
Harvey logo
Harvey
Medium
Software Engineer

Spreadsheet Class With Set/Get, Cell-Reference Formulas and Cycle-Rejecting Writes

Implement an in-memory spreadsheet. Cells are named by column letters followed by a row number, such as A1 or C12. The interview built the class in th...

Software Engineering FundamentalsData Structure DesignGraphs
19
0
147 people solved
Oct 11, 2026
Google logo
Google
Medium
Software Engineer

Explore the Island at a Given Cell With BFS, Then Count Lakes Enclosed by Land

A satellite image is given as an N × M grid of characters, where 'X' is land and '.' is water. You are also given the coordinate (r, c) of one cell in...

Software Engineering FundamentalsGrids & Matrices
20
1
136 people solved
Oct 14, 2026
Rippling logo
Rippling
Medium
Software Engineer

Task Scheduler with Dependencies, Priorities and Filters

Implement a task scheduler that decides the order in which a set of tasks is output. The interviewer's specification was long and full of detailed con...

Software Engineering FundamentalsGraphsHeaps & Priority Queues
32
0
390 people solved
Sep 29, 2026
ZipHQ logo
ZipHQ
Medium
Software Engineer

Extend a questionnaire condition evaluator with numeric questions and nested AND/OR logic

You are working in an existing Python project that parses questionnaire definitions and evaluates conditions on them. A questionnaire is an ordered li...

Software Engineering FundamentalsParsing & InterpretersCode Quality & Maintainability
43
0
313 people solved
Sep 8, 2026
Stripe logo
Stripe
Medium
Software Engineer

Role-Based Access Control with Accounts, Parent-User Inheritance and Reverse Lookups

Build the access-control logic for a system in which users hold roles on accounts. Each user has one or more accounts, and on each account the user ho...

Software Engineering FundamentalsAuthentication & AuthorizationGraphs
2
0
28 people solved
Nov 1, 2026
Amazon logo
Amazon
Medium
Software Engineer

Minimize Grid Inconvenience by Adding One Delivery Center

A binary grid represents delivery coverage: 1 marks a delivery center and 0 marks an ordinary location. The distance between cells (r1, c1) and (r2, c...

Coding & AlgorithmsGrids & MatricesBinary Search
39
0
513 people solved
Sep 4, 2026
DoorDash logo
DoorDash
Medium
Software Engineer

Build a Refund Workflow Engine over an Outcome-Driven DAG

Extend an existing refund workflow engine whose nodes form a directed acyclic graph. A node performs work such as checking an order delay, issuing a r...

Software Engineering FundamentalsJob Scheduling & WorkflowsDistributed Transactions & Idempotency
3
0
37 people solved
Oct 24, 2026
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