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Tech Interview Questions

Practice the exact questions companies are asking right now.

Questions
12.2k
Companies
569
Updated
10.14.2026
12.2k Questions 569 Companies10.14.2026
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
Machine Learning Engineer

Design multi-GPU matrix multiplication

Multi-GPU MatMul (2 GPUs): Design and Implementation You are given two GPUs connected via NVLink or PCIe. You must compute C = A × B where: - A is sha...

ML System DesignGPU Programming
15
1
233 people solved
Sep 6, 2025
Abnormal Security logo
Abnormal Security
Hard
Software Engineer

Design a scalable photo deduplication service

Design a scalable photo deduplication service System Design: Productionizing Duplicate-Photo Removal at Scale Context Design a production system that ...

System DesignFile & Media StorageBatch & Stream Processing
18
0
207 people solved
Jul 16, 2025
Pinterest logo
Pinterest
Medium
Software Engineer

Decide target via subsequence plus/multiply expression

Question Given a sequence of positive 32-bit integers A and an integer target, determine whether there exists a subsequence of A (preserving order, us...

Coding & AlgorithmsBacktracking & Recursion
19
0
279 people solved
Sep 6, 2025
Databricks logo
Databricks
Medium
Software Engineer

Design BFS to detect forced win in Tic-Tac-Toe

You are given an n×n Tic-Tac-Toe–like board and a target k (1 ≤ k ≤ n). From the current board state and the player to move, design an algorithm to de...

Coding & AlgorithmsGraphs
32
0
294 people solved
Aug 13, 2025
Adobe logo
Adobe
Medium
Software Engineer

Design an Extensible Tree Traversal Library

Question Design a reusable tree-traversal library that supports preorder, inorder, postorder, and level-order traversal. Callers supply their own acti...

Software Engineering Fundamentals
2
0
16 people solved
Apr 19, 2026
Coinbase logo
Coinbase
Medium
Software Engineer

Implement a versioned recipe management system

You are asked to implement an in-memory Recipe Management System (similar in difficulty to a simple banking/in-memory DB exercise). The system support...

Coding & AlgorithmsLow-Level Design (OOP)
26
0
309 people solved
Nov 23, 2025
CloudKitchens logo
CloudKitchens
Medium
Software Engineer

Design receipt system with combo discounts

Question You are building a point-of-sale ordering UI for a food-ordering workflow. You are given class stubs and a callback you must wire up: - Item(...

Coding & AlgorithmsLow-Level Design (OOP)
22
0
264 people solved
Sep 6, 2025
OpenAI logo
OpenAI
Hard
Software Engineer Locked

Design a crossword puzzle solver system

This question evaluates algorithm design, constraint solving, efficient lookup data structures, and system scalability for handling large dictionaries...

System DesignBacktracking & RecursionString Algorithms
55
0
416 people solved
Feb 11, 2026
Anthropic logo
Anthropic
Hard
Software Engineer Locked

Design stack with O(1) minimum query

This question evaluates understanding of stack-based data structures, constant-time operation constraints, and handling edge cases such as empty queri...

Coding & AlgorithmsData Structure DesignStacks & Queues
64
0
489 people solved
Feb 1, 2026
Uber logo
Uber
Medium
Machine Learning Engineer

Compute minimal time to finish dependent tasks

Coding: Task Scheduling With Prerequisites (Parallel Allowed) You have n tasks labeled 1..n. Each task takes exactly 1 unit of time to complete. Some ...

Coding & AlgorithmsGraphs
18
0
219 people solved
Dec 15, 2025
Axon logo
Axon
Medium
Machine Learning EngineerSenior+ Locked

Design Video Intelligence for Investigations

This question evaluates a candidate's competency in designing scalable, multimodal video intelligence systems that integrate machine learning, informa...

ML System DesignSearch RelevanceComputer Vision
21
0
165 people solved
May 26, 2026
Coupang logo
Coupang
Medium
Software Engineer

Find shortest distance between two islands

Problem You are given an R x C binary grid where: - 1 represents land - 0 represents water The grid contains exactly two 4-directionally connected isl...

Coding & Algorithms
12
0
84 people solved
Dec 13, 2025
Lyft logo
Lyft
Easy
Software Engineer

Validate a Binary Search Tree Iteratively

Problem Determine whether a binary tree is a valid binary search tree. Every value in a node's entire left subtree must be smaller than the node value...

Coding & Algorithms
3
1
51 people solved
Apr 14, 2026
TikTok logo
TikTok
Medium
Software Engineer

Compute length of longest increasing subsequence

You are given an integer array nums of length n. A subsequence of nums is a sequence that can be derived from nums by deleting zero or more elements w...

Coding & AlgorithmsDynamic ProgrammingBinary Search
11
0
110 people solved
Dec 10, 2025
Airbnb logo
Airbnb
Medium
Data Scientist

Test conversion difference and adjust for clustering

Using aggregated results for the 7‑day window 2025‑08‑26..2025‑09‑01, evaluate statistical significance and power for conversion uplift, accounting fo...

Statistics & MathHypothesis TestingExperiment Analysis & Readout
27
0
219 people solved
Oct 13, 2025
Moody's logo
Moody's
Medium
Software Engineer Locked

Design a Product Inventory and Pricing Service

Design a read-heavy product, price, and inventory service that remains fast for browsing without weakening checkout correctness. The exercise compares...

System Design
2
0
25 people solved
Jul 25, 2026
TikTok logo
TikTok
Medium
Data Scientist

Calculate Conversion Rate from Ad Clicks to Page Visits

user_events | user_id | event_time | event_type | ad_id | |---------|----------------------|------------|-------| | 1 | 2023-01-01 10:...

Data Manipulation (SQL/Python)
5
0
41 people solved
Aug 4, 2025
Capital One logo
Capital One
Medium
Data Scientist

Evaluate OutlierHandler Class for Code Quality and Testing

Code Review: OutlierHandler and Imputer Classes You are given a Python module that implements one OutlierHandler class and three Imputer classes for p...

Machine Learning
70
0
197 people solved
Jul 12, 2025
LinkedIn logo
LinkedIn
Medium
Software Engineer

Minimize adjacent-color assignment cost

Minimize adjacent-color assignment cost You are given H linear items (e.g., houses) and an H×C cost matrix where cost[i][c] is the cost of assigning c...

Coding & AlgorithmsDynamic Programming
6
0
124 people solved
Aug 10, 2025
Uber logo
Uber
Medium
Software Engineer AI Locked

Design a Parking Lot

This question evaluates object-oriented modeling, API design, resource allocation, and concurrency control by asking for classes, relationships, key m...

Software Engineering FundamentalsLow-Level Design (OOP)Concurrency
82
0
800 people solved
Apr 21, 2026
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