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

"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_

"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"

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

"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."

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

"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."

CarlosFull Stack, Shopify

"The solution quality is insane. It covers approach, edge cases, time complexity, follow-ups. Nothing else comes close."

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."

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

"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."

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

"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."

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

"I recently cleared Uber interviews (strong hire in the design round) and all the questions were present in prachub."

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

_The_TaNk_

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

"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."

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

CarlosFull Stack, Shopify

"The solution quality is insane. It covers approach, edge cases, time complexity, follow-ups. Nothing else comes close."

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."

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

"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."

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

"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."

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

"I recently cleared Uber interviews (strong hire in the design round) and all the questions were present in prachub."

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

WiseDatabricksMeta

Medium

Software Engineer

Track Tic-Tac-Toe Winners across Valid Alternating Moves

Problem Implement TicTacToe(int n) and move(row,col,player). The two players alternate, always choose a previously empty valid cell, and stop after a ...

Coding & AlgorithmsData Structure DesignSimulation & State Machines

Spiral Order of a Matrix With Blocker Cells That Force Clockwise Turns

You are given an m x n matrix of integers. First, return all of its values in clockwise spiral order, from the outside in: start at the top-left cell,...

Coding & AlgorithmsGrids & MatricesSimulation & State Machines

Software EngineerSenior+ Locked

Design a Global One-to-One Voice Calling System

Design global one-to-one voice calls with device registration, signaling, accept/reject races, media negotiation, relay fallback, and mobile recovery.

System DesignReal-Time SystemsAPI Design

Research Scientist Locked

Implement and Benchmark Speculative Decoding

Design normal and speculative language-model decoding with correct proposal verification, rejection, sampling, EOS, positions, and key-value cache sta...

Software Engineer AI Locked

Implement a Searchable Logger Pipeline

This question evaluates proficiency in software design, data structures, and algorithmic text search by requiring a transformation pipeline, ordered i...

Coding & AlgorithmsData Structure DesignIndexing & Query Performance

In-Memory Per-Second API Rate Limiter: Accept or Reject Each Request

An API endpoint is protected by an in-memory rate limiter. The limiter is created with one value, max_per_second, the largest number of requests it le...

Coding & AlgorithmsRate LimitingData Structure Design

Design a Data Pipeline for Messy Pod Alerts and Bad Pod Detection

Design a data system that turns messy pod alert history into structured signals and detects bad pods by comparing them to sibling replicas. `hint Hint...

System DesignETL & Data PipelinesData Cleaning & Wrangling

212 people solved

May 4, 2026

GoogleAmazonMicrosoft

Medium

Software Engineer

Count Primes Strictly before an Integer Bound

Problem Return how many prime numbers are strictly smaller than n. A prime is an integer at least 2 whose only positive divisors are 1 and itself. Do ...

Coding & AlgorithmsMath & Number Theory

Design a Real-Time Comment System Front End With Optimistic Updates

Design the front end of a real-time comment system. Viewers see new comments from other people appear live, and can post their own. The interviewer's ...

System DesignState ManagementReal-Time Systems

Why Google, Handling a Rejection, and What You Expect From a Manager

This is a behavioral ("Googlyness") round for a software engineering role at Google. The interviewer asked two questions, each with follow-ups. Clarif...

Behavioral & LeadershipMotivation & FitLeadership & Influence

Bringing Customers Into Every Stage From Problem Discovery to Release

How do you keep customers involved across a product's life, from first discovering a problem through developing and shipping the solution? Walk throug...

Behavioral & LeadershipUser Research & DiscoveryRequirements & Launch Execution

Software Engineer Locked

Simulate Players Moving Under a Watcher's Gaze

Simulate players advancing along a road while a moving watcher periodically reverses direction and freezes observed players. Follow the exact discrete...

Coding & AlgorithmsSimulation & State MachinesIntervals & Scheduling

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

Software Engineer Locked

Minimize Car Removals for a Two-Car Bridge

Remove the fewest cars from a fixed-order queue so a two-car one-way bridge never exceeds its weight limit. Every retained car must fit alone, every a...

Coding & Algorithms

136 people solved

Aug 5, 2026

VisaSquarepointZomato

Hard

Software Engineer

Choose One Initial Infection to Remove from an Undirected Network

Problem In the undirected adjacency matrix graph, infection spreads across every edge until no further nodes can become infected. Remove exactly one n...

Coding & AlgorithmsGraphs

20 people solved

OpenAI

Hard

Machine Learning Engineer

Compute Matrix Prefix Products And Gradients

You are given $N$ square matrices $A[0], A[1], \dots, A[N-1]$, each of shape $D \times D$. Define the inclusive prefix (cumulative) products: $$Y[i] =...

Machine LearningML CodingNeural Networks & Training

Software EngineerNew Grad

Implement Order Modification Feature

You are given an existing C++ trading system with a client/server architecture. The current system already supports two request types: - AddOrder(orde...

Coding & AlgorithmsCode Quality & MaintainabilityAPI Design

Split Markdown Into Header-Aware Chunks

Implement a function that splits a Markdown document into ordered chunks, where each chunk must not exceed a given size limit. A Markdown header is a ...

Coding & AlgorithmsParsing & InterpretersArrays & Strings

Order Fill Rate From Partial-Execution Records, and What Drives It

You receive a CSV export of order activity from a stock-trading app. Its columns are roughly dt, order_id, execution_price, execution_quantity, order_...

Data Manipulation (SQL/Python)Pandas & Python DataData Cleaning & Wrangling

OpenAI Product Strategy: First Feature to Help People Without Tech Skills Use AI

OpenAI wants its AI tools to be easier to use for people who have no technical background. As a product manager, which product or feature would you pu...

Product Design & StrategyAI Product ManagementPrioritization & Tradeoffs

17 people solved

Oct 1, 2026

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Tech Interview Questions

Track Tic-Tac-Toe Winners across Valid Alternating Moves

Spiral Order of a Matrix With Blocker Cells That Force Clockwise Turns

Design a Global One-to-One Voice Calling System

Implement and Benchmark Speculative Decoding

Implement a Searchable Logger Pipeline

In-Memory Per-Second API Rate Limiter: Accept or Reject Each Request

Design a Data Pipeline for Messy Pod Alerts and Bad Pod Detection

Count Primes Strictly before an Integer Bound

Design a Real-Time Comment System Front End With Optimistic Updates

Why Google, Handling a Rejection, and What You Expect From a Manager

Bringing Customers Into Every Stage From Problem Discovery to Release

Simulate Players Moving Under a Watcher's Gaze

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

Minimize Car Removals for a Two-Car Bridge

Choose One Initial Infection to Remove from an Undirected Network

Compute Matrix Prefix Products And Gradients

Implement Order Modification Feature

Split Markdown Into Header-Aware Chunks

Order Fill Rate From Partial-Execution Records, and What Drives It

OpenAI Product Strategy: First Feature to Help People Without Tech Skills Use AI

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ML System Design

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