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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
Amazon logo
Amazon
Medium
Software Engineer

Minimum Time to Finish Dependent Cake-Making Steps When Steps Can Run in Parallel

A bakery breaks the job of making a cake into n steps labeled 0 to n - 1, such as preheating the oven, mixing the batter, baking, making the frosting ...

Coding & AlgorithmsGraphs
8
1
91 people solved
Oct 9, 2026
Oracle logo
Oracle
Medium
Software Engineer

Largest Island After Converting at Most One Water Cell to Land

You are given a rectangular grid in which 1 marks land and 0 marks water, and land cells connected horizontally or vertically form islands. You may ch...

Coding & AlgorithmsGrids & MatricesGraphs
3
0
47 people solved
Oct 15, 2026
Google logo
Google
Medium
Software Engineer

Mouse-to-Cheese Grid Path That Maximizes the Minimum Distance to a Cat

You are given an N x N grid that contains a mouse's starting cell S, a piece of cheese at T, a cat at C, water cells and land cells. The mouse moves o...

Coding & AlgorithmsGrids & MatricesGraphs
17
1
248 people solved
Sep 17, 2026
OpenAI logo
OpenAI
Hard
Software Engineer Locked

Fault-Tolerant Work Queue with Leases, Fencing Tokens and DAG Task Dependencies

Implement a fault-tolerant work queue in which workers claim tasks under expiring leases, crashed workers' tasks are reassigned, and late reports from...

Software Engineering FundamentalsJob Scheduling & WorkflowsDistributed Coordination
26
0
239 people solved
Sep 20, 2026
Snowflake logo
Snowflake
Medium
Software Engineer

Propagate Permission Letters Through a DAG Using Each Node's Final State

A permission system is modeled as a directed acyclic graph with n nodes, numbered 0 to n - 1. Permissions are single lowercase letters. An edge [u, v]...

Coding & AlgorithmsGraphs
10
0
141 people solved
Sep 15, 2026
Harvey logo
Harvey
Medium
Software Engineer Locked

Eager Spreadsheet Formulas with Constant-Time Reads

Implement eager spreadsheet formulas with constant-time cached reads, transitive dependency updates, cycle rejection, and atomic definition replacemen...

Coding & AlgorithmsData Structure DesignGraphs
21
0
327 people solved
Sep 1, 2026
Reddit logo
Reddit
Medium
Machine Learning Engineer

Exclude Cat- or Dog-Related Comments and All Their Replies by Reader Mode

You are given the comments of a discussion thread. Every comment either replies to another comment, its parent, or is top-level, so the comments form ...

Coding & AlgorithmsTrees
5
0
96 people solved
Sep 7, 2026
Meta logo
Meta
Medium
Software Engineer

Design a People-You-May-Know Friend Recommendation System

Design a friend recommendation feature ("people you may know") for a large social network. Each user sees a list of people they are not yet connected ...

System DesignRecommendation SystemsRetrieval & Candidate Generation
17
0
143 people solved
Sep 14, 2026
Reddit logo
Reddit
Medium
Android Engineer

Exclude Opposite-Category Comments and Their Descendants

Each comment has a unique ID, a parent comment ID or no parent, and a dog or cat category. For a dog-preferring viewer, exclude every cat comment and ...

Coding & AlgorithmsTrees
1
0
15 people solved
Oct 21, 2026
Uber logo
Uber
Hard
Software Engineer

Count Islands of Connected Land Cells in a Binary Grid

You are given an m x n grid where 1 is land and 0 is water. An island is a maximal group of land cells connected horizontally or vertically. Return th...

Coding & AlgorithmsGrids & Matrices
12
0
85 people solved
Sep 29, 2026
Amazon logo
AmazonBloombergGoogle

Also asked at Google, Microsoft, Uber, Meta, TikTok, Citadel, Nuro, Snapchat, PhonePe, Rippling, Flipkart, Goldman Sachs

Medium
Software EngineerSenior+

Answer a large batch of variable-ratio queries from division equations

You are given a list of equations between variables. Equation i is equations[i] = [a, b] together with a real number values[i], and it states that a /...

Coding & AlgorithmsGraphs
17
2
145 people solved
Google logo
GoogleAmazonMeta

Also asked at Meta, Flexport, Microsoft, Bloomberg, Oracle, Apple, ByteDance, Siemens, NVIDIA, eBay, Nutanix

Medium
Software Engineer

Clone Connected Graph Nodes without Sharing Original Objects

Problem Given a node reference in a connected undirected graph, return the corresponding node reference in a deep copy of the graph. Each original nod...

Coding & AlgorithmsGraphs
2
0
28 people solved
Apple logo
Apple
Medium
Software Engineer

Days Until Poison Stops Spreading in a Plant Grid Under a K-of-8-Neighbors Rule

A field of plants is laid out as an m x n grid. A cell holding 0 is a healthy plant and a cell holding 1 is a poisoned plant. Poison spreads once a da...

Coding & AlgorithmsGrids & MatricesGraphs
11
2
119 people solved
Sep 20, 2026
OpenAI logo
OpenAI
Hard
Software Engineer

Implement a minimal reverse-mode autograd engine on PyTorch tensors

In an ML coding interview you are asked to implement the core of an automatic differentiation ("autograd") system of the kind PyTorch provides, with t...

Machine LearningML CodingNeural Networks & Training
9
0
153 people solved
Sep 19, 2026
Glean logo
Glean
Medium
Machine Learning Engineer

Decide If a Passenger Can Reach a Station Using Time-Indexed Train Routes and Transfers

A train schedule is a collection of trains moving between stations, where stations are named by strings. Time starts at 0. Each train is given as a li...

Coding & AlgorithmsGraphs
5
0
65 people solved
Sep 30, 2026
LinkedIn logo
LinkedIn
Medium
Software EngineerSenior+

Lexicographically Smallest Topological Order of a Dependency Graph

You are given a dependency graph with n nodes labeled 0 to n - 1 and a list of directed edges, where an edge [u, v] means node u must come before node...

Coding & AlgorithmsGraphsHeaps & Priority Queues
6
0
75 people solved
Sep 29, 2026
ByteDance logo
ByteDance
Medium
Data EngineerNew Grad

Schedule Tasks With Ready Times on Limited Resources to Finish the Last One Earliest

You have limited compute resources and a set of tasks to run. For every task you know its execution time and its ready time, the earliest moment it ma...

Software Engineering FundamentalsGreedy
0
0
7 people solved
Nov 2, 2026
Google logo
Google
Medium
Software Engineer

Arrange Crops into Connected Regions in Rectangular and Two-Square Gardens

A rectangular garden has N rows and M columns. There are K crop types, labeled 1 through K. Crop i must occupy exactly count[i] cells, and the counts ...

Coding & AlgorithmsGrids & MatricesBacktracking & Recursion
15
1
174 people solved
Aug 26, 2026
Retell AI logo
Retell AI
Medium
Software EngineerNew Grad Locked

Two-Level Flight Search System with Weekly Schedules and Arrival Times

Implement an in-memory flight search system in two levels: add, delete, count and search flights by route, then add weekly schedules with per-day canc...

Software Engineering FundamentalsData Structure DesignLow-Level Design (OOP)
8
0
58 people solved
Sep 19, 2026
Plaid logo
Plaid
Medium
Software Engineer Locked

Validate and Resolve Chained Decision Rules

Validate a table of named rules whose results may reference other rules, then determine whether every rule resolves without missing references or cycl...

Coding & AlgorithmsGraphsArrays & Strings
72
0
634 people solved
Aug 4, 2026
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