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

"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

ByteDance

Medium

Data Scientist Locked

Find Each User's Earliest Seven-Day Activity Streak

A PostgreSQL interview problem about finding each user's earliest streak of at least seven consecutive active dates. It tests date deduplication, gaps...

Data Manipulation (SQL/Python)SQL

Machine Learning Engineer Locked

How would you improve card-type detection?

This question evaluates a candidate's ability to design robust detection logic, covering system design, data modeling, validation, and operational con...

Software Engineering FundamentalsPayments & LedgersCode Quality & Maintainability

Find minimum activations to absorb all balls

You are given n balls on a 2D plane, where ball i is at coordinate $(x_i, y_i)$. You are also given a distance threshold d. Two balls are considered...

Coding & AlgorithmsGraphs

Estimate Population Mean and Conversion Rate Accurately

Estimate Population Mean and Conversion Rate Accurately You are asked a series of statistical inference questions covering hypothesis testing, confide...

Statistics & MathHypothesis TestingSampling & Estimation

Implement hostname-restricted web crawler

Implement a single-threaded web crawler that, given a starting URL startUrl and an interface getUrls(url) that returns all hyperlinks on the page at u...

Coding & AlgorithmsGraphs

Choose best prompt for AI code debugging

When using AI tools such as ChatGPT to help debug code, which prompting approach is generally most effective? Options: - A. Directly paste the complet...

Software Engineering FundamentalsAI-Assisted Development

Software Engineer Locked

Compute board-game score from regions

This question evaluates grid traversal and connected-component identification skills along with region-based aggregation (counting cells and summing c...

Coding & AlgorithmsGrids & Matrices

Implement KV store and plan type conversions

Part 1 — Versioned key-value store: Implement a data structure with set(key, value, t) and get_at(key, t) that returns the value for key whose timesta...

Coding & AlgorithmsData Structure DesignGraphs

Check Digits and Combine Ranges

You are asked to solve two independent coding tasks. Task 1: Check Whether an Integer Reads the Same Backward Given an integer x, return true if its d...

Compare Sentences Using Transitive Synonym Groups

Problem Given synonym pairs and two tokenized sentences, return whether the sentences are equivalent. They are equivalent only if they have the same n...

Introduce Yourself and Explain What You Want in Your Next Engineering Role

The interviewer opens a 30-minute software engineer phone screen with two questions in a row. The screen is mostly behavioral and experience questions...

Behavioral & LeadershipMotivation & Fit

Machine Learning Engineer

Explain ML model fundamentals

Explain ML model fundamentals Comprehensive ML Concepts: Logistic Regression, Naive Bayes, Transformers, Multi-class Metrics, Bagging vs Boosting Cont...

ML System DesignML FundamentalsTransformers & Attention

Software Engineer Locked

Compute total active time per Twitter Space

This question evaluates a candidate's ability to perform event-log sessionization and time-interval aggregation across users and spaces, testing skill...

Coding & AlgorithmsData Structure DesignHeaps & Priority Queues

186 people solved

Feb 11, 2026

Choose the Cheapest Round Trip

Choose departure and return days that minimize a round-trip cost while requiring departure before return. Derive a linear scan that retains the best e...

Walk through a recent technical project

Project Deep-Dive (Onsite Behavioral + Technical) Context: Choose a recent technical project (ideally within the last 12–18 months) where you led or h...

Behavioral & LeadershipProject Deep Dive

Design a multi-tenant CI/CD platform

Question Design a multi-tenant CI/CD system that runs pipelines triggered by Git activity, isolates tenants from one another, and scales to thousands ...

System DesignCI/CD & DeploymentJob Scheduling & Workflows

Software EngineerSenior+ Locked

Turn an Unlikely Project Around and Recover When AI Coding Falls Short

Prepare two senior engineering stories: turning an apparently infeasible project into a credible result, and recovering when an AI coding tool produce...

Behavioral & LeadershipAI-Assisted DevelopmentOwnership & Execution

Design in-memory payment and friendship system

Design and implement an in-memory payment system with simple social features. The system processes a sequence of requests that can: 1. Register a user...

Coding & AlgorithmsLow-Level Design (OOP)

254 people solved

Dec 8, 2025

Medium

Machine Learning EngineerSenior+

Model y from x and interpret distributions

Scenario You are given a dataset with one input feature x and a target y. The interviewer asks: “How would you model this?” Later, you are shown a plo...

Machine LearningSupervised LearningModel Monitoring & Drift

Data Scientist Locked

Explain Bootstrap and Prove Uniformity

This question evaluates mastery of statistical inference and probability theory, testing knowledge of resampling methods (bootstrap), interpretation o...

Statistics & MathProbabilityHypothesis Testing

185 people solved

Dec 3, 2025

Tech Interview Questions

Find Each User's Earliest Seven-Day Activity Streak

How would you improve card-type detection?

Find minimum activations to absorb all balls

Estimate Population Mean and Conversion Rate Accurately

Implement hostname-restricted web crawler

Choose best prompt for AI code debugging

Compute board-game score from regions

Implement KV store and plan type conversions

Check Digits and Combine Ranges

Compare Sentences Using Transitive Synonym Groups

Introduce Yourself and Explain What You Want in Your Next Engineering Role

Explain ML model fundamentals

Compute total active time per Twitter Space

Choose the Cheapest Round Trip

Walk through a recent technical project

Design a multi-tenant CI/CD platform

Turn an Unlikely Project Around and Recover When AI Coding Falls Short

Design in-memory payment and friendship system

Model y from x and interpret distributions

Explain Bootstrap and Prove Uniformity

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