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

Medium

Software Engineer

Design a max-stack with efficient operations

Design a max-stack with efficient operations Design a stack that supports push (x), pop(), top(), peekMax(), and popMax(). The popMax operation must r...

Coding & AlgorithmsData Structure DesignStacks & Queues

Netflix Engagement Strategy: Pick a Member Segment and Features That Lift Viewing

Netflix wants its members to engage more with the service. What would you do to raise engagement? `hint Pin down engagement first Hours watched, days ...

Product Design & StrategyProduct Design & ImprovementGrowth & Monetization

Find Smallest Common Row Value

You are given a 2D integer matrix where each row is sorted in strictly increasing order. Return the smallest integer that appears in every row. If no ...

Design and explain your project architecture

Question Pick one of your recent projects and walk an interviewer through its architecture end-to-end. Sketch a high-level diagram, then go deep on th...

System DesignProject Deep DiveSystem Design Fundamentals

Design Durable, Cost-Efficient Storage and Delivery for Very Large Video Files

Design a system that stores very large video files. Explain how a video gets into the system, how it is kept safe and affordable to store over time, a...

System DesignTechnical Tradeoffs for PMsFile & Media Storage

Compute sample size and analyze A/B results

A/B Test: Sample Size, Sequential Correction, and Post-Experiment Analysis Context You are planning a two-arm A/B test with a binary (Bernoulli) conve...

Statistics & MathExperiment Design (A/B Testing)Sequential & Adaptive Testing

Google Pay product improvement for time-pressed users juggling routine payments

You are a product manager on Google Pay. How would you improve it for busy people? Say exactly which busy people you mean, identify where paying with ...

Product Design & StrategyProduct Design & ImprovementMetrics & KPIs

Implement a minimal local HTTP server

Build a Minimal Local HTTP/1.1 Server (No Frameworks) Context You are asked to implement a minimal HTTP/1.1 server from scratch using only the standar...

Software Engineering FundamentalsNetworkingConcurrency

Compare Random Forests and Boosted Trees: Bias, Variance, Speed

Compare Random Forests and Gradient-Boosted Trees You are choosing and configuring tree-based ensemble models for a product-facing data-science proble...

Machine LearningSupervised Learning

Data Scientist Locked

Build a predictive model from TurboTax sample data

Build a predictive model from TurboTax sample data evaluates core ML concepts, assumptions, math intuition, training/evaluation trade-offs, and practi...

Machine LearningSupervised LearningFeature Engineering

Implement expression expansion to plus-only form

Given a string expression consisting only of lowercase letters (variables), '+', '*', '(', and ')', return an equivalent expression that uses only '+'...

Describe toughest project experience

Behavioral Question Describe the toughest experience you had on a project you worked on. Include: - The project context and your role/responsibilities...

Behavioral & Leadership

Formulate hypotheses and compute AB test significance

A/B Test Snapshot: Pickup ETA Card Experiment You are analyzing a 7-day A/B test with equal allocation. Each request is an exposure; the primary outco...

Statistics & MathHypothesis TestingExperiment Analysis & Readout

Expand Internationally: Data and Strategy for Market Entry

Expand Internationally: Data and Strategy for Market Entry Behavioral + Product Sense (Onsite) Context You are interviewing for a Data Scientist role ...

Behavioral & Leadership

Machine Learning Engineer

Discuss resume and company fit

Behavioral Prompt: Resume Walkthrough (RL or Systems), Motivation, and 6–12 Month Plan Context You are interviewing for a Machine Learning Engineer ro...

Behavioral & LeadershipMotivation & FitOwnership & Execution

Build and validate a binary classifier

ML Pipeline with Grouped CV, Imbalance Handling, Calibration, and Thresholding Context: You have a labeled dataset where the target is is_active_30d (...

Explaining What Energizes and What Frustrates You in Product Management Work

In a product manager interview at Fandom, the interviewer asks a two-sided question: what do you enjoy about working as a product manager, and what do...

Behavioral & LeadershipMotivation & Fit

9 people solved

Jun 22, 2025

Solve sliding window and tree BFS problems

1) Sliding window: Given an array of positive integers nums and an integer target, return the minimal length of a contiguous subarray whose sum is at ...

Software Engineer Locked

Design a Multi-Branch Library Lending System

Design a multi-branch library system for catalog search, reservations, checkout, returns, and branch-level copy availability. Explore concurrency-safe...

Software Engineer Locked

Design a large-scale temperature sensor system

This question evaluates system design and distributed-systems competencies including large-scale data ingestion, time-series storage, real-time visual...

System DesignSystem Design FundamentalsData Ingestion & CDC

104 people solved

Jan 6, 2026

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Tech Interview Questions

Design a max-stack with efficient operations

Netflix Engagement Strategy: Pick a Member Segment and Features That Lift Viewing

Find Smallest Common Row Value

Design and explain your project architecture

Design Durable, Cost-Efficient Storage and Delivery for Very Large Video Files

Compute sample size and analyze A/B results

Google Pay product improvement for time-pressed users juggling routine payments

Implement a minimal local HTTP server

Compare Random Forests and Boosted Trees: Bias, Variance, Speed

Build a predictive model from TurboTax sample data

Implement expression expansion to plus-only form

Describe toughest project experience

Formulate hypotheses and compute AB test significance

Expand Internationally: Data and Strategy for Market Entry

Discuss resume and company fit

Build and validate a binary classifier

Explaining What Energizes and What Frustrates You in Product Management Work

Solve sliding window and tree BFS problems

Design a Multi-Branch Library Lending System

Design a large-scale temperature sensor system

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