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

Perplexity

Medium

Product Manager

Plan a Staged Launch of a New AI Feature at Perplexity, From Dogfood to Full Release

Perplexity has built a new feature. Explain how you would take it from a finished build to full availability for the users it is meant for. `hint Let ...

Product Design & StrategyRequirements & Launch ExecutionAI Product Management

Data ScientistIntern Locked

Explain Medical AI Data and Evaluation

This question evaluates competence in medical conversational AI covering data sourcing and cleaning, leakage-aware dataset splitting, model choice (pr...

Data Scientist Locked

Evaluate a Bike Dasher Program with a Controlled Experiment

Evaluate a bicycle courier program with a decision-focused marketplace experiment. The case covers pickup dwell-time measurement, success and guardrai...

Analytics & ExperimentationExperiment Design (A/B Testing)Causal Inference

191 people solved

Jul 18, 2026

Qube Research & Technologies

Medium

Software Engineer

Implement flat_map, redistribute wealth evenly

Implement flat_map, redistribute wealth evenly Implement std::flat_map in C++, including its iterator; explain design choices and add thorough test ca...

Coding & AlgorithmsProgramming LanguagesArrays & Strings

122 people solved

Aug 4, 2025

BloombergMicrosoftAmazon

Easy

Software Engineer

Smallest Absent Positive Multiple

Problem You are given an integer array nums and a positive integer k. Return the smallest positive integer divisible by k that does not appear in nums...

Coding & AlgorithmsArrays & StringsMath & Number Theory

6 people solved

Instacart

Medium

Backend EngineerSenior+ AI

Clarify and Implement Search Filters for a Library Table

Clarify and Implement Search Filters for a Library Table An existing library-management application shows a book table that users find too long and di...

Software Engineering Fundamentals

Implement three whiteboard coding tasks

The interview report described several coding questions in the same category: 1. Binary search: Given a sorted array of integers and a target value, r...

Coding & Algorithms

107 people solved

Jan 30, 2026

Meta Product Sense: Helping People Summon Urgent Assistance in a Crisis

You are a product manager at Meta. Design a product that lets people ask for help when they are in an emergency. Decide which kind of emergency and wh...

Product Design & StrategyProduct SenseTrust & Safety

Compare SQL counts, windows, and NULL semantics

You’re given two tables. users(id INT, country STRING, created_at DATE) rows: 1 | US | 2025-08-28 2 | US | 2025-08-30 3 | IN | 2025-08-29 4 | BR | 202...

Data Manipulation (SQL/Python)SQL

Design real-time fraud detection under 50ms

Design a real-time fraud detection system for a payments company that processes millions of transactions per day. Requirements: - For each incoming tr...

ML System DesignPayments & LedgersMLOps & Model Serving

Software EngineerSenior+ Locked

Design a Synchronous Text Classification API

Design a synchronous text-classification API with a small stateless online path and versioned model artifacts. Cover authentication, validation, load ...

Software Engineer Locked

Find the Minimum Parenthesis Deletions and Their Positions

Return the source indices for a minimum set of parenthesis deletions that leaves a valid sequence, choosing the lexicographically smallest index list ...

How to evaluate lowering ETA?

Uber wants to estimate the business value of reducing ETA, where ETA is the predicted time from when a rider requests a trip until the driver arrives ...

Analytics & ExperimentationMetrics & KPIsCausal Inference

Explain a Difficult Product Call and the Evidence You Used to Justify It

Walk me through a difficult product decision you owned. Why was it hard, what evidence and reasoning did you use to support it, and what happened as a...

Behavioral & LeadershipAmbiguity & Decision Making

9 people solved

Jun 9, 2026

ByteDanceAmazonGoogle

Hard

Software Engineer Locked

Count Target-Sum Paths in an N-ary Tree

This question evaluates a candidate's competency in tree data structures and traversal algorithms, specifically counting path sums in N-ary trees and ...

Weighted Word Mapping in Reverse Alphabet Order

Problem You are given lowercase English words in words and 26 positive integer letter weights. weights[0] belongs to a, weights[1] to b, and so on thr...

Coding & AlgorithmsArrays & StringsMath & Number Theory

Sum the Bit Differences across All Array Pairs

Sum the Bit Differences across All Array Pairs The Hamming distance between two nonnegative integers is the number of bit positions at which their bin...

Coding & AlgorithmsBit ManipulationMath & Number Theory

7 people solved

Assess ranking change and design experiment

A multi-account product currently orders a user's accounts by most recent visit. The product team wants to change the ranking so that accounts with th...

Analytics & Experimentation

Machine Learning Engineer

Design short-video retrieval with sparse text

You are designing the candidate-generation (retrieval) and recommendation system for a short-video app. Constraints and setting: - Users can search wi...

ML System Design

116 people solved

Feb 3, 2026