Tech Interview Questions

Practice the exact questions companies are asking right now.

Questions

12.1k

Companies

579

Updated

10.10.2026

12.1k Questions 579 Companies10.10.2026

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

DRW

Medium

Software EngineerIntern

Solve three algorithmic OA problems

This is an online assessment (Codility-style, 150 minutes) consisting of three independent coding problems. Solve each one separately; they do not sha...

Coding & AlgorithmsBacktracking & RecursionBit Manipulation

Assess an AI Research Organization and Explain Your Fit

Prepare an evidence-based explanation of your interest in an AI research organization. Compare it with other AI labs, assess a recent action it took, ...

Behavioral & LeadershipMotivation & FitAmbiguity & Decision Making

Software Engineer Locked

Vertical Order Traversal of a Binary Tree

This question evaluates a candidate's ability to combine tree traversal with coordinate-based grouping and tie-breaking logic. It tests understanding ...

Software Engineer Locked

Extensible Security-Event Pipeline: Rule Suppression and Plugin-Based Enrichment

This question evaluates a candidate's ability to design extensible, plugin-based software architecture for a multi-tenant processing pipeline. It test...

Software Engineering Fundamentals

Find best downhill ski run from a start

You are given an R x C grid of integers representing elevations. A skier starts at a given cell (sr, sc). From a cell, the skier may move up/down/left...

Coding & AlgorithmsDynamic ProgrammingGrids & Matrices

Find Shortest Grid Path

You are given an m x n grid where 0 represents an open cell and 1 represents a blocked cell. You are also given a start cell (sr, sc) and a target cel...

Coding & AlgorithmsGrids & MatricesGraphs

Software EngineerNew Grad

Design an In-Memory Pub-Sub Model

Design an object-oriented, in-memory publish-subscribe model. Requirements: - A publisher can publish a message to a topic. - A subscriber can subscri...

Software Engineering FundamentalsLow-Level Design (OOP)Concurrency

Machine Learning Engineer

Analyze vision model failures

For a computer vision product, discuss the following: 1. Explain the core machine learning fundamentals that matter most in vision work, including bia...

Machine LearningModel Monitoring & DriftML Fundamentals

230 people solved

Mar 1, 2026

Easy

Data Scientist Locked

Implement np.random.choice

This question evaluates understanding of random sampling algorithms, probability distributions (uniform and weighted), handling of weights and edge-ca...

Software EngineerIntern

Coordinate Video Reading and Rendering at 25 Frames per Second

You are given a Frame type and a VideoPlayer with two operations: Read() returns the next frame or an end-of-video indication, and Render(frame) displ...

Software Engineering FundamentalsConcurrency

Design and Debug a Point-in-Time Backtest Data Pipeline

Practice diagnosing a point-in-time financial backtest pipeline, from identifier resolution and vendor backfills to stale data, outliers, and look-ahe...

Software Engineer Locked

Build message schema parser with size/type queries

This question evaluates parsing of a simple message schema, construction of mappings from field names to primitive types and byte sizes, and computati...

Software Engineer Locked

Implement type AST and infer generics

This question evaluates a candidate's ability to design an abstract syntax tree representation and implement generic type inference for a small langua...

Coding & AlgorithmsParsing & Interpreters

Implement 2048 tilt move

Problem: Implement a 2048 “tilt” (move) operation You are given a 4×4 board for the game 2048. Each cell contains either 0 (empty) or a power of two (...

Coding & AlgorithmsSimulation & State Machines

Explain and Compare SGD and Adam

Explain and Compare SGD and Adam Explain how stochastic gradient descent updates model parameters and how Adam modifies those updates using moving est...

Machine Learning Engineer

Implement Multi-Head Attention with a KV Cache and Cached Grouped-Query Attention

Implement the attention layer of a decoder-only transformer from scratch, in three steps that build on each other: standard multi-head attention, a ke...

Machine LearningTransformers & AttentionML Coding

Implement Python feature and resolver metaprogramming

You are given a skeleton for a small Python "feature" framework. The goal is to use metaprogramming to: 1. Parse type-annotated classes into Feature o...

Coding & AlgorithmsProgramming Languages

Software Engineer Locked

Count the Ways to Split a Digit String into Primes

This question evaluates dynamic programming combined with number theory, specifically counting valid partitions of a digit string under a primality co...

Frontend Engineer Locked

Design Calendar Frontend State for Recurring Events

Design frontend state and APIs for a calendar with bounded views, recurring series, and single-occurrence rescheduling. Separate normalized server dat...

Implement a GPU credit manager

Implement a GPU credit manager for a compute cluster. Each user has a nonnegative credit balance that can be increased (grantCredits(user, amount)), c...

Coding & AlgorithmsData Structure DesignGPU Infrastructure

411 people solved

Aug 8, 2025

Tech Interview Questions

Solve three algorithmic OA problems

Assess an AI Research Organization and Explain Your Fit

Vertical Order Traversal of a Binary Tree

Extensible Security-Event Pipeline: Rule Suppression and Plugin-Based Enrichment

Find best downhill ski run from a start

Find Shortest Grid Path

Design an In-Memory Pub-Sub Model

Analyze vision model failures

Implement np.random.choice

Coordinate Video Reading and Rendering at 25 Frames per Second

Design and Debug a Point-in-Time Backtest Data Pipeline

Build message schema parser with size/type queries

Implement type AST and infer generics

Implement 2048 tilt move

Explain and Compare SGD and Adam

Implement Multi-Head Attention with a KV Cache and Cached Grouped-Query Attention

Implement Python feature and resolver metaprogramming

Count the Ways to Split a Digit String into Primes

Design Calendar Frontend State for Recurring Events

Implement a GPU credit manager

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