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

Oracle

Medium

Backend EngineerSenior+ Locked

Return the K Most Frequent Values with a Larger-Value Tie-Break

Return the k most frequent distinct integers ordered by descending frequency, with larger values ranked first whenever frequencies tie.

Invent a New Product That Builds on Strava's Athlete Community and Activity Data

Propose a new product built around Strava, the app where runners, cyclists and other athletes record their activities and follow each other's training...

Product Design & StrategyProduct SenseGrowth & Monetization

Software Engineer Locked

Filter Invalid Data Events

This question evaluates a candidate's ability to implement data validation, deduplication, stable filtering, time-range and allow-list checks, and to ...

Software Engineer Locked

Design a multi-level API rate limiter

This question evaluates understanding of rate limiting, distributed system design, concurrency control, scalability, and operational observability whe...

System DesignRate Limiting

Software Engineer Locked

Count Complete Highway Journeys from Toll Logs

Count completed highway journeys from unsorted entry, main-road, and exit toll records grouped by vehicle and direction. Handle replacement entries, m...

Machine Learning Engineer

Derive Backpropagation for Matrix-Product Layers

Consider a neural-network block whose output is produced by multiplying a sequence of trainable weight matrices together, then applying the resulting ...

Machine LearningNeural Networks & Training

Find Every Island in a Grid and Measure Its Boundary with Water

You are given an m x n grid where 1 is land and 0 is water. An island is a group of land cells connected horizontally or vertically. This is a variant...

Coding & AlgorithmsGrids & Matrices

Integration Design for an AI Agent Deployed Inside a Client's Business Systems

Design an AI system that plugs into another company's data and business workflows, so it can do useful work inside that company's existing processes. ...

Product Design & StrategyAI Product ManagementPlatform & API Products

Software Engineer Locked

Design a JSON Schema Validator

Design a robust JSON schema validator covering parsing, required and unknown fields, types, regexes, numeric limits, and safe extensibility.

Software Engineering Fundamentals

105 people solved

Aug 27, 2026

Medium

Technology Consultant Locked

Explain a Career Move in a Self-Contained Consulting Scenario

Practice a truthful why-leave and why-consulting answer from a fully specified fictional scenario. Connect prior analytics work, client delivery, impl...

Behavioral & Leadership

Machine Learning EngineerSenior+ Locked

Design a Drop-off Spot Selector

This question evaluates expertise in ML-driven system design for safety-critical autonomous vehicle decisions, covering real-time decision-making, geo...

Software Engineer Locked

Explain Your AI Safety Values

Prepare evidence-based answers for an AI safety values interview, connecting beliefs to concrete decisions and past behavior. Explore uncertain risk, ...

Behavioral & LeadershipEthics & Responsibility

Find and Merge Camera Alert Intervals

You are given surveillance camera readings as time-series data. Each reading is a pair (timestamp, value), sorted by timestamp. A camera is considered...

Planning a Low-Disruption Over-the-Air Release for Tesla's Vehicle Fleet

Tesla cars depend on over-the-air software updates for new features and fixes. You are the product manager responsible for a major update. How would y...

Product Design & StrategyRequirements & Launch ExecutionCI/CD & Deployment

Software Engineer Locked

Explain a Project That Could Not Meet a Tight Deadline

Explain a missed or renegotiated deadline with early risk signals, personal accountability, explicit scope trade-offs, and a concrete planning improve...

Behavioral & LeadershipFailure & LearningCommunication & Stakeholders

46 people solved

Sep 20, 2026

GoogleAmazonBloomberg

Hard

Software Engineer

Fewest Integer Squares Tiling a Rectangle

Problem Tile an n-by-m rectangle completely with integer-sided squares, without overlaps or uncovered regions. Return the smallest number of squares. ...

Coding & AlgorithmsBacktracking & RecursionGrids & Matrices

15 people solved

Gong

Medium

Software EngineerSenior+

Design a Service That Finds Common Free Time Across Connected Calendars

Design a calendar availability service. Given a set of people and a time window, it answers when they are free, so that the product can propose meetin...

System DesignIntervals & SchedulingAPI Integration & HTTP Clients

Implement Stateful Fetch-N over a Paginated Upstream

Implement Stateful Fetch-N over a Paginated Upstream Scenario An existing upstream method fetch(pageToken) returns {items, nextPage}. Build a stateful...

Software Engineering Fundamentals

148 people solved

May 1, 2026

American ExpressGoogle

Medium

Software Engineer

Largest Equal Squares with No Shared Cells

Largest Equal Squares with No Shared Cells You are given an m-by-n binary matrix mat. A cell is usable when it contains 1 and unusable when it contain...

Coding & AlgorithmsGrids & MatricesBinary Search

11 people solved

OpenAI

Medium

Software Engineer Locked

Serialize and Restore an In-Memory Key-Value Store

Define a deterministic binary format for serializing an in-memory store with arbitrary UTF-8 string keys and values, then outline encoding and decodin...

Software Engineering FundamentalsParsing & Interpreters

215 people solved

Aug 14, 2026

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Tech Interview Questions

Return the K Most Frequent Values with a Larger-Value Tie-Break

Invent a New Product That Builds on Strava's Athlete Community and Activity Data

Filter Invalid Data Events

Design a multi-level API rate limiter

Count Complete Highway Journeys from Toll Logs

Derive Backpropagation for Matrix-Product Layers

Find Every Island in a Grid and Measure Its Boundary with Water

Integration Design for an AI Agent Deployed Inside a Client's Business Systems

Design a JSON Schema Validator

Explain a Career Move in a Self-Contained Consulting Scenario

Design a Drop-off Spot Selector

Explain Your AI Safety Values

Find and Merge Camera Alert Intervals

Planning a Low-Disruption Over-the-Air Release for Tesla's Vehicle Fleet

Explain a Project That Could Not Meet a Tight Deadline

Fewest Integer Squares Tiling a Rectangle

Design a Service That Finds Common Free Time Across Connected Calendars

Implement Stateful Fetch-N over a Paginated Upstream

Largest Equal Squares with No Shared Cells

Serialize and Restore an In-Memory Key-Value Store

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