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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
Apple logo
Apple
Hard
Software Engineer

Smallest Valid Task Order from Dependency Pairs (Topological Sort)

A project consists of n tasks labeled 0 to n - 1, done one at a time. Some tasks depend on others: a dependency pair [a, b] means task a must be finis...

Coding & AlgorithmsGraphsHeaps & Priority Queues
5
0
65 people solved
Aug 28, 2026
Amazon logo
Amazon
Medium
Software Engineer Locked

Grid Reachability for a Robot That Cannot Reverse and Has Restricted Turns

Decide whether a robot on a grid with blocked cells can travel from a start cell to a destination when it may never reverse direction and may only mak...

Coding & AlgorithmsGrids & MatricesGraphs
21
1
235 people solved
Sep 20, 2026
Google logo
GoogleAmazonStackline

Also asked at Stackline, Meta, Microsoft, Bloomberg, Splunk

Medium
Software Engineer

Return All Minimum-Height Roots of an Undirected Tree

Problem Given a tree with node labels 0 through n-1, return all roots minimizing the greatest root-to-leaf edge distance. Return the root labels in an...

Coding & AlgorithmsTreesGraphs
0
0
15 people solved
OpenAI logo
OpenAI
Medium
Software Engineer Locked

Return the Lexicographically Smallest Topological Order

Return the lexicographically smallest valid ordering of a directed dependency graph, or an empty result when a cycle exists. The problem tests determi...

Coding & AlgorithmsGraphsHeaps & Priority Queues
94
0
705 people solved
Aug 1, 2026
Amazon logo
Amazon
Medium
Software Engineer

Fewest Moves for a Chess Piece With Type-Specific Step Directions to Capture the King

A board game is played on a rectangular grid. Your piece starts on one square and wins by capturing the opposing king, which it does by moving onto th...

Coding & AlgorithmsGraphsGrids & Matrices
7
1
80 people solved
Oct 1, 2026
Visa logo
Visa
Medium
Software Engineer

Longest Strictly Rising Four-Direction Walk in an Integer Grid

Given a grid of non-negative integers with m rows and n columns, return the number of cells on the longest walk whose values strictly increase from ea...

Coding & AlgorithmsDynamic ProgrammingGrids & Matrices
5
0
64 people solved
Sep 27, 2026
Google logo
Google
Medium
Software Engineer

Environment Variable Store with %KEY% Placeholder Substitution

Implement a small environment-variable store with template substitution. The setting is a shell startup file such as .zshrc, where a line like export ...

Software Engineering FundamentalsParsing & InterpretersTesting & Quality
5
0
50 people solved
Sep 6, 2026
Scale AI logo
Scale AI
Easy
Software Engineer AI

Design a Streaming Job Scheduler

Design and incrementally build a streaming job scheduler: a service (and supporting class) that continuously ingests tasks and dispatches them to work...

System DesignJob Scheduling & WorkflowsGraphs
273
1
2390 people solved
Apr 9, 2026
Netflix logo
Netflix
Medium
Software Engineer

Recommend New Friends from a Mutual-Friendship Graph and Scale the Approach

This round is framed as problem solving rather than pure coding. The interviewer asks you to work out how a social product should suggest new friends ...

Software Engineering FundamentalsGraphsHeaps & Priority Queues
1
0
27 people solved
Aug 31, 2026
Snowflake logo
Snowflake
Medium
Software Engineer Locked

Resolve Inherited Allow and Deny Permissions in a DAG

Resolve each node's permission in an inheritance DAG where any reachable deny overrides an allow and nodes without an inherited decision are denied by...

Coding & AlgorithmsGraphsAuthentication & Authorization
16
0
235 people solved
Aug 15, 2026
Ethos logo
Ethos
Medium
Software Engineer

Find Array Elements Uniquely Determined by Known Range Sums

An integer array A of length n is hidden from you; its positions are numbered 1 to n. You are given a list of ranges (L, R), and the sum A[L] + A[L+1]...

Coding & AlgorithmsGraphsArrays & Strings
10
0
70 people solved
Aug 21, 2026
Glean logo
Glean
Medium
Machine Learning Engineer

Design a Work-Together Distance Between Any Two Employees of a Company

Design a "people distance" d(u1, u2) between any two users in a company that quantifies how much the two of them work together. A smaller distance sho...

ML System DesignFeature EngineeringModel Evaluation
2
0
36 people solved
Sep 30, 2026
ByteDance logo
ByteDance
Hard
Software Engineer

Implement a binary min-heap and use it to order courses with prerequisites

In one coding round of about 30 minutes, you are asked to write a heap yourself and then to use it in a variant of the course-scheduling problem. Cons...

Software Engineering FundamentalsHeaps & Priority QueuesGraphs
1
0
26 people solved
Oct 4, 2026
Amazon logo
AmazonGoogleOracle

Also asked at Oracle, TikTok, Bloomberg, Meta, Microsoft, Flipkart, HTC, Apple, Stripe, Uber, Snowflake, Intuit, Snapchat, Expedia

Medium
Software Engineer

Find the Cheapest Flight Route with a Stop Limit

Problem Each flights row [from,to,price] is a directed flight. Return the cheapest total fare from src to dst using at most k intermediate stops, or -...

Coding & AlgorithmsGraphsDynamic Programming
1
0
15 people solved
Capital One logo
Capital One
Medium
Software Engineer Locked

Grid State After a Given Number of Days of Spoilage Spreading to Neighbors

A grid holds empty cells, fresh items and spoiled items, and each day spoilage spreads from every spoiled item to its edge-adjacent fresh neighbors. G...

Coding & AlgorithmsGrids & MatricesGraphs
6
0
67 people solved
Sep 17, 2026
Citadel logo
Citadel
Medium
Software EngineerIntern Locked

Return a Valid Dependency Order for Named Tasks

Solve a named-task dependency graph with deterministic topological sorting and explicit cycle detection. Learn to include dependency-only tasks, dedup...

Coding & AlgorithmsGraphs
41
0
501 people solved
Aug 13, 2026
Pinterest logo
Pinterest
Medium
Software Engineer Locked

Remove and Compact a Parent-Index Forest

Remove a node and all descendants from a parent-index forest, preserve surviving order, compact indices, and rewrite every surviving parent reference ...

Coding & AlgorithmsTreesArrays & Strings
37
2
405 people solved
Aug 27, 2026
Apple logo
Apple
Medium
Software Engineer

Count Nodes in a Line Network through Neighbor Messages

Nodes form a left-to-right network. Each node can call isLeftMost() and isRightMost(), sendMessageToLeft(message), and sendMessageToRight(message), an...

Software Engineering FundamentalsDistributed CoordinationMessaging & Event-Driven
1
0
22 people solved
Aug 26, 2026
OpenAI logo
OpenAI
Medium
Software Engineer Locked

Count Connected Friend Groups

Count connected friend groups from a symmetric adjacency matrix where indirect connections place people in the same group. Work within a 200-person li...

Coding & AlgorithmsGraphs
65
0
469 people solved
Jul 1, 2026
Airwallex logo
Airwallex
Medium
Software Engineer Locked

Design a Real-Time Robot Chase Game on a Weighted Terrain Grid

System design question on a server-authoritative real-time chase game where AI robots pathfind toward a player across a 500x500 weighted terrain grid....

System DesignMultiplayer Game SystemsGraphs
8
0
63 people solved
Sep 10, 2026
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