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

Bitkernel

Medium

Software Engineer

Solve cups logic puzzle with one true statement

There are 4 cups on a table. Each cup has a statement written on it: - Cup 1 says: All cups contain fruit candy. - Cup 2 says: This cup contains apple...

Software Engineering Fundamentals

Use OrderedDict to dedupe stably

Implement dedupe_preserve_order(seq) that removes duplicates from a list while preserving the order of first appearance, in O(n) time and O(k) space (...

Data Manipulation (SQL/Python)

32 people solved

Oct 13, 2025

Implement weighted random index picker

Implement weighted random index picker Design a class WeightedPicker that is initialized with an array of positive integer weights w and supports pick...

Improve low R² without p‑hacking

Predicting Contribution per Order with Low R² Context You are modeling contribution per order (a continuous per-order outcome such as margin or profit...

Machine LearningRegression & Statistical ModelingFeature Engineering

Your Product Operating Model and How You Turn Strategy into Measurable Goals

An interviewer for a product manager role at American Express asks a two-part behavioral question about how you work: first, how you approach product ...

Behavioral & LeadershipMetrics & KPIsRoadmapping & Planning

Design a Machine Learning Recommendation System Pipeline

Design a Machine Learning Recommendation System Pipeline System Design: End-to-End ML Recommendation System Scenario You are building an end-to-end ma...

Implement course scheduling and rate limiter analysis

You are given two independent coding problems. --- Problem 1: Course Scheduling You are planning to take a set of courses and are given prerequisite r...

Coding & AlgorithmsGraphsTwo Pointers & Sliding Window

Determine If Two Strings Are Anagrams Efficiently

Scenario Backend service needs to verify whether two user-provided strings are anagrams for text-matching features. Question Implement a Python functi...

Coding & Algorithms

118 people solved

Jul 12, 2025

Redesign the Shopper's Trip Through a Physical Supermarket, Without Online Ordering

You are a product manager asked to improve what it is like to shop inside a physical grocery store. The interviewer wants ideas that help people durin...

Product Design & StrategyProduct Design & ImprovementPrioritization & Tradeoffs

Clean and Summarize User Purchase Data Efficiently

Data Manipulation (SQL/Python)

Find spammer with minimal hasMessaged calls

Question You have n accounts labeled 0..n-1 and an oracle API: ` boolean hasMessaged(a, b) // true iff account a has sent at least one message to ac...

Coding & AlgorithmsGraphs

Software Engineer Locked

Find Shortest Covering Substring

This question evaluates proficiency in string processing, handling character multiplicities, and designing time- and space-efficient algorithms for su...

Product Sense: Build a Seller Tool for Running a Shop Through Instagram

You are a product manager asked to design a product, on the web, on mobile or both, that helps people sell their products through Instagram. Decide wh...

Product Design & StrategyProduct SenseMetrics & KPIs

Software EngineerSenior+

Design an Offline Multi-Device E-Book Reader

Design an Offline Multi-Device E-Book Reader Design an e-book reader service with APIs, database schema, and overall architecture. A user may read off...

Software Engineer Locked

Apply operations efficiently using Command pattern

This question evaluates skills in object-oriented design, the Command Pattern, correctness reasoning, extensibility of operation abstractions, and opt...

Software Engineering FundamentalsLow-Level Design (OOP)Code Quality & Maintainability

Implement minimal RLE encode/decode with max run K

You are given a run-length encoding (RLE) format that compresses a string by grouping consecutive repetitions of a short substring. Encoding format An...

Data Scientist Locked

Compute capacity, staffing trade-offs, and break-even

This question evaluates capacity-planning, bottleneck identification, labor-cost trade-offs, contractor vs overtime comparisons, break-even computatio...

Analytics & ExperimentationBusiness Case AnalysisOperations & Capacity

Quantitative Researcher

Find the Minimum in a Rotated Sorted Array

Find the Minimum in a Rotated Sorted Array A strictly increasing array of distinct integers has been rotated at an unknown pivot. Return its minimum v...

Chrome for Laptops, Desktops and Tablets: Vision and a Phased Multi-Year Product Plan

You are the product manager for Google Chrome on large screens. Lay out a three-year innovation roadmap for the product. `hint Define the screen, then...

Product Design & StrategyRoadmapping & PlanningProduct Strategy

Airbnb Experiment Roadmap: A/B Tests to Lift Guest Bookings Across the Funnel

You are a product manager working on the guest side of Airbnb. The goal is to raise the booking rate among guests, and you are asked which A/B tests y...

Analytics & ExperimentationExperiment Design (A/B Testing)Experiment Analysis & Readout

19 people solved

Jul 11, 2024

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Tech Interview Questions

Solve cups logic puzzle with one true statement

Use OrderedDict to dedupe stably

Implement weighted random index picker

Improve low R² without p‑hacking

Your Product Operating Model and How You Turn Strategy into Measurable Goals

Design a Machine Learning Recommendation System Pipeline

Implement course scheduling and rate limiter analysis

Determine If Two Strings Are Anagrams Efficiently

Redesign the Shopper's Trip Through a Physical Supermarket, Without Online Ordering

Clean and Summarize User Purchase Data Efficiently

Find spammer with minimal hasMessaged calls

Find Shortest Covering Substring

Product Sense: Build a Seller Tool for Running a Shop Through Instagram

Design an Offline Multi-Device E-Book Reader

Apply operations efficiently using Command pattern

Implement minimal RLE encode/decode with max run K

Compute capacity, staffing trade-offs, and break-even

Find the Minimum in a Rotated Sorted Array

Chrome for Laptops, Desktops and Tablets: Vision and a Phased Multi-Year Product Plan

Airbnb Experiment Roadmap: A/B Tests to Lift Guest Bookings Across the Funnel

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