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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 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
Airbnb logo
Airbnb
Medium
Machine Learning Engineer Locked

Design photo and listing quality models

This question evaluates competency in machine learning product design and engineering, encompassing labeling strategy, feature engineering, model sele...

Machine LearningRanking ModelsAnnotation & Label Quality
18
0
183 people solved
Jan 5, 2026
SIG (Susquehanna) logo
SIG (Susquehanna)
Medium
Data Scientist

Compute ruin probability with bold betting

Probability of Reaching 5 Tokens Before Ruin Setup - You start with 3 tokens, target is 5 tokens, and ruin is 0. - On each turn, you bet as many token...

Statistics & MathProbabilityPuzzles & Brainteasers
18
0
203 people solved
Aug 11, 2025
Apple logo
Apple
Medium
Software EngineerNew Grad

Explain How You Learn an Unfamiliar Technical Topic

How do you learn something new? Give a specific technical example and explain how you decided what to study, practiced it, checked your understanding,...

Behavioral & LeadershipSelf-Awareness & Growth
1
0
13 people solved
Mar 14, 2026
Capital One logo
Capital One
Medium
Data Scientist

Build and evaluate airline delay prediction model

You are given several CSVs for the classic airline delay challenge with columns like flight_date, carrier, flight_num, origin, dest, sched_dep, sched_...

Machine LearningModel EvaluationFeature Engineering
17
0
151 people solved
Oct 13, 2025
Runloop logo
Runloop
Medium
Software Engineer

Design a Minesweeper Bot That Decides Which Cell to Flag or Reveal Next

Design a bot that plays Minesweeper. The bot's goal is to win as often as possible, which means clearing the board without ever revealing a mine. The ...

Software Engineering FundamentalsBacktracking & RecursionProbability
0
0
8 people solved
Jul 11, 2026
Google logo
Google
Medium
Machine Learning Engineer

Design a Product or Video Recommendation System

Design a recommendation system for a large consumer platform. The platform may recommend either products in an e-commerce feed or videos in a media fe...

ML System DesignRecommendation SystemsRanking Models
33
1
230 people solved
Dec 24, 2025
Two Sigma logo
Two Sigma
Hard
Data ScientistIntern

Count Distinct Island Shapes in a Binary Grid

You are given an m x n binary grid grid, where grid[i][j] is either 0 (water) or 1 (land). An island is a maximal group of 1-cells connected 4-directi...

Coding & Algorithms
6
0
67 people solved
Nov 15, 2025
Voleon logo
Voleon
Hard
Software Engineer Locked

Process exchange prints, volume checks, and client orders

This question evaluates a candidate's ability to implement real-time stream processing, sliding-window aggregation for time-based volume calculations,...

Coding & AlgorithmsSimulation & State MachinesTrading Systems
52
0
640 people solved
Sep 6, 2025
Amazon logo
Amazon
Medium
Data Scientist

Design student–course data models and SQL

Scenario: Model a university domain with Students, Courses, Departments, Instructors, and Enrollments. Tasks: 1) OLTP ERD: Specify normalized tables w...

Data Manipulation (SQL/Python)
6
0
50 people solved
Oct 13, 2025
LinkedIn logo
LinkedIn
Medium
Data EngineerSenior+

Implement a stack supporting max and popMax

Design a data structure that behaves like a stack but also supports retrieving and removing the current maximum value. Implement a class MaxStack with...

Coding & AlgorithmsData Structure DesignStacks & Queues
13
0
119 people solved
Feb 2, 2026
Snapchat logo
Snapchat
Hard
Data Scientist

Derive logistic regression and thresholds

Logistic Regression Deep Dive (Binary Classification) Assume a binary classification setting with observations {(x_i, y_i)} for i=1..n, where x_i ∈ R^...

Statistics & MathRegression & Statistical ModelingSupervised Learning
13
0
109 people solved
Oct 13, 2025
Scale AI logo
Scale AI
Medium
Software Engineer

Explain worker state machine load balancer design

You are designing a lightweight load balancer for a Python-based backend service that dispatches tasks to a pool of worker processes. Describe how you...

Software Engineering FundamentalsJob Scheduling & WorkflowsLow-Level Design (OOP)
30
0
321 people solved
Dec 8, 2025
OpenAI logo
OpenAI
Medium
Product Manager

Describing Your Personal Interest in AI for a PM Role at an AI Company

In a product manager interview at an AI company, the interviewer asks you to talk about what draws you to AI. What do you say? `hint Show it rather th...

Behavioral & LeadershipMotivation & FitAI Product Management
2
0
17 people solved
Apr 7, 2026
Google logo
GoogleMetaAmazonBloomberg

Also asked at Amazon, Bloomberg

Easy
Software Engineer

Digit Product Minus Digit Sum

Problem For positive integer n, multiply its decimal digits and separately add them. Return the product minus the sum. `cpp class Solution { public: ...

Coding & AlgorithmsMath & Number Theory
0
0
6 people solved
Amazon logo
Amazon
Hard
Software Engineer

Design an intersection traffic-light system

System Design: Traffic-Light Control for a Multi-Road Intersection Context Design the software and systems for controlling a signalized, multi-approac...

System DesignSystem Design FundamentalsSimulation & State Machines
29
0
443 people solved
Sep 6, 2025
NVIDIA logo
NVIDIA
Medium
Software Engineer

Explain Transformers and QKV matrices

Transformer Self-Attention: Q, K, V, Multi-Head, and Positional Encoding You are given a sequence of token embeddings $X$ (sequence length $n$, model ...

Machine LearningTransformers & Attention
23
0
252 people solved
Jul 15, 2025
Reddit logo
Reddit
Medium
Data ScientistSenior+

Query US-based users and most active forums

You are given user and post data for an online forum platform. Tables (schemas) Assume the following tables: users - user_id BIGINT (PK) - home_countr...

Data Manipulation (SQL/Python)SQL
14
2
235 people solved
Sep 19, 2025
Whatnot logo
Whatnot
Medium
Machine Learning Engineer

Design trending livestream discovery

Design a system for a live-commerce platform that surfaces trending livestreams to users. Assume an ML model for scoring trendiness or relevance alrea...

ML System DesignRecommendation SystemsReal-Time Systems
12
0
193 people solved
Jan 17, 2026
TikTok logo
TikTok
Hard
Machine Learning Engineer

Define QKV for recommender cross-attention

You are designing a deep-learning–based recommendation system that uses a Transformer-style cross-attention block to model the interaction between a u...

Machine Learning
11
0
101 people solved
Dec 8, 2025
Microsoft logo
Microsoft
Medium
Software EngineerSenior+ Locked

Explain Platform Evolution, Ownership, and Career Motivation

Explain a platform’s evolution, your exact ownership, the trade-offs behind changes, and a concrete, professional motivation for the next role.

Behavioral & LeadershipProject Deep DiveMotivation & Fit
1
0
23 people solved
Sep 10, 2026
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