Tech Interview Questions

Practice the exact questions companies are asking right now.

Questions

12.1k

Companies

579

Updated

10.10.2026

12.1k Questions 579 Companies10.10.2026

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

Upstart

Easy

Data ScientistSenior+

Combine noisy thermometers; compute random-walk correlations

Problem 1: Estimating a true temperature from noisy thermometers Assume the true (fixed) temperature is an unknown constant $\theta$. 1a) One thermo...

Statistics & MathSampling & EstimationProbability

Design ride-hailing pricing with fairness and pooling

System Design: Ride-Hailing Pricing Engine Context Design a pricing engine for a ride-hailing platform that maximizes revenue while ensuring fairness ...

Machine Learning Engineer

Build a model using only pandas/numpy

You are given a tabular dataset as a pandas DataFrame df with: - Feature columns (numeric and/or categorical) - A target column y (either binary class...

Machine LearningML CodingFeature Engineering

Solve Python Challenges: Reverse String, Palindrome, Fibonacci, Unique List

Scenario Live coding round – four quick Python exercises Question Implement a function that reverses a string in-place. Write code that returns True i...

Machine Learning EngineerSenior+

Discuss compensation expectations and level

HR Screen: Compensation Expectations for a Senior Machine Learning Engineer Context: In an initial HR screen for a senior-level Machine Learning Engin...

Behavioral & Leadership

Find maximum cable length by cutting

You are given N cables with integer lengths and a target K. Cut the cables into pieces of equal integer length L to produce at least K pieces; maximiz...

Write SQL with window functions for analytics

Given a table events(user_id, event_time, event_type, value), write SQL to: a) compute each user's rolling 7-day sum of value by day, b) rank each use...

Data Manipulation (SQL/Python)

Business Intelligence Engineer

Analyze Top Book Sales and Unique Customer Purchases

Data Manipulation (SQL/Python)

Machine Learning Engineer

How do you align ambiguous cross-functional projects?

This hiring-manager interview was a 45-minute behavioral discussion centered on past project work and communication skills. A candidate should be prep...

Behavioral & LeadershipProject Deep DiveAmbiguity & Decision Making

Generate Synthetic Clickstream Data with Python Function

Scenario The analytics team needs to generate synthetic click-stream records to test a new reporting pipeline before real traffic arrives. Question Wr...

Analyze profits under random walk and Brownian motion

Analyze profits under random walk and Brownian motion Random-Walk Trading Rules: Expectation and Variance Setup - Let (S_t) be a simple random walk fo...

Statistics & MathProbability

Machine Learning Engineer

Design Apple News without ML

Design an initial search and content-discovery system for a news application similar to Apple News, assuming you do not have a trained ranking model y...

System DesignSearch & Feed SystemsSearch Relevance

Design a URL shortener

Design a URL shortening service similar to Bitly. The service should accept a long URL and return a short alias, and visiting the short URL should red...

System DesignSystem Design FundamentalsAPI Design

Software Engineer Locked

Maximal Square and Longest Increasing Subsequence

Implement two independent analyses: the largest all-ones square in a binary matrix and the length of a strictly increasing subsequence. Account for em...

Coding & AlgorithmsDynamic ProgrammingBinary Search

Merge multiple sorted arrays using min-heap

Problem You are given k sorted arrays of integers: - arrays[0], arrays[1], ..., arrays[k-1] - Each arrays[i] is sorted in non-decreasing order. - The ...

Software Engineer Locked

Design a rolling hit counter API

This question evaluates proficiency with data structures for time-window aggregation and understanding of time/space trade-offs when counting events w...

Coding & AlgorithmsData Structure DesignStacks & Queues

Data Scientist Locked

How would you measure product success?

This question evaluates a data scientist's ability to design and interpret product analytics for a subscription-based, seat-licensed collaborative pro...

Analytics & ExperimentationMetrics & KPIsSegmentation & Cohort Analysis

Design document-tag classes with concurrency safety

Design document-tag classes with concurrency safety System Design: In‑Memory Document–Tag Manager (Single Node) Context You are designing an in-memory...

Write SQL to find top net-revenue products

Using the sample schema and data below, write a single SQL query that returns, for the last 7 days relative to today (use today = 2025-09-01, so the w...

Data Manipulation (SQL/Python)SQL

Optimize a small-string C++ class

You are implementing a high-performance C/C++ string type that uses a small-string optimization: short strings are stored inline in a fixed buffer, an...

Software Engineering FundamentalsProgramming LanguagesMemory Management

156 people solved

Dec 18, 2025

Tech Interview Questions

Combine noisy thermometers; compute random-walk correlations

Design ride-hailing pricing with fairness and pooling

Build a model using only pandas/numpy

Solve Python Challenges: Reverse String, Palindrome, Fibonacci, Unique List

Discuss compensation expectations and level

Find maximum cable length by cutting

Write SQL with window functions for analytics

Analyze Top Book Sales and Unique Customer Purchases

How do you align ambiguous cross-functional projects?

Generate Synthetic Clickstream Data with Python Function

Analyze profits under random walk and Brownian motion

Design Apple News without ML

Design a URL shortener

Maximal Square and Longest Increasing Subsequence

Merge multiple sorted arrays using min-heap

Design a rolling hit counter API

How would you measure product success?

Design document-tag classes with concurrency safety

Write SQL to find top net-revenue products

Optimize a small-string C++ class

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