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

OpenAI

Medium

Data ScientistSenior+

Write SQL for post-trial conversion cohorts

Using the schema below, write SQL to compute, for users first exposed between 2025‑06‑01 and 2025‑06‑30 (inclusive), the intent‑to‑treat paid conversi...

Data Manipulation (SQL/Python)SQLExperiment Analysis & Readout

Machine Learning EngineerIntern

Design an Enterprise Tool-Using Agent

Design an enterprise LLM agent that can use external tools to complete multi-step business tasks. Assume the agent may call tools such as document ret...

Compute precision–recall curve on imbalanced data

You receive a CSV with columns: actual_label ∈ {0,1} and predicted_prob ∈ [0,1]; the positive class rate is ≈5%. a) Which evaluation metrics would you...

Coding & AlgorithmsModel EvaluationML Coding

Machine Learning Engineer Locked

Parse JSON Accounts into Typed Python Objects and Prepare Features

Parse a JSON account snapshot into typed Python objects, reject non-finite decimal balances, sum exact values, and prepare reproducible feature data. ...

Data Manipulation (SQL/Python)

Inclusive Running Sums of an Integer Array

Problem Return an array whose entry i equals the sum of the original entries nums[0] through nums[i],inclusive. `cpp class Solution { public: vect...

Coding & AlgorithmsArrays & Strings

6 people solved

AmazonGoogleMicrosoft

Medium

Software Engineer

Implement basic calculator

Implement an arithmetic-expression evaluator for nonnegative integer operands and the binary operators +, -, *, and /. Return the integer value of the...

Design Event Email System

Design Event Email System Design an event system that can manage at least 1,000,000 concurrent events and send notification emails to every registered...

System DesignSystem Design FundamentalsMessaging & Event-Driven

Solve path normalization and nested iterator

1) Normalize Unix-style absolute paths: Given a string representing an absolute Unix file path, return its canonical form. Rules: '.' refers to the cu...

Coding & AlgorithmsData Structure DesignStacks & Queues

243 people solved

Sep 6, 2025

AmazonGoogleBloomberg

Medium

Software Engineer

Fewest Keypresses After Remapping Letters That May Repeat

Fewest Keypresses After Remapping Letters That May Repeat You are given a string word of lowercase English letters. Letters may occur more than once. ...

Coding & AlgorithmsGreedySorting

Design document editor with undo/redo and batching

Design a document-editing layer that supports applying edits and undo. Implement an API with apply(Operation op), undo(), and getText(). Then add tran...

Coding & AlgorithmsData Structure Design

Software Engineer Locked

Prioritize Several Simultaneous High-Priority Tasks

Explain how you prioritized several simultaneous high-priority engineering tasks, established a defensible order, communicated trade-offs, and adapted...

Behavioral & Leadership

Simulate a two-player card war game

Simulate a two-player card war game Implement a function to simulate a two-player card game. Each player has a queue of card ranks (top at index 0), w...

Coding & AlgorithmsSimulation & State Machines

350 people solved

Aug 10, 2025

Write SQL for video-call recipients and FR activity

Given the schema and samples below, write ANSI‑SQL to answer both questions. Assume dates are stored in UTC. Today is 2025-09-01, so “yesterday” is 20...

Data Manipulation (SQL/Python)SQL

Machine Learning EngineerSenior+ Locked

Design a Game Recommendation System

This question evaluates mastery of designing scalable end-to-end machine learning recommendation systems, including candidate generation, multi-stage ...

ML System DesignRecommendation SystemsRanking Models

Choosing Offline and Online Metrics to Evaluate a Generative AI Feature's Output

You are the product manager for an AI product whose core output is text generated by a large language model. How would you judge whether that generate...

Analytics & ExperimentationAI Product ManagementLLM Evaluation

Answer Sorted Pair-GCD Position Queries

Problem Given a positive integer array nums, form one greatest common divisor for every pair of different positions (i, j) with i < j. Sort all those ...

Coding & AlgorithmsMath & Number TheoryBinary Search

9 people solved

Grammarly

Medium

Software Engineer Locked

Implement a rate limiter and a pub/sub API

This question evaluates competency in concurrency control, synchronization, API and low-level system design, and messaging system concepts by combinin...

Software Engineering FundamentalsRate LimitingMessaging & Event-Driven

Design a scalable payment system

Design a scalable payment system Design a scalable payment system. The system must support both peer-to-peer money movement between users and merchant...

System DesignPayments & LedgersDistributed Transactions & Idempotency

Frontend Engineer Locked

Build a Real-Time Event Feed Dashboard

Build the React logic for a live event-feed dashboard with typed sections, newest-first ordering, rolling 30-second statistics, and pause/resume behav...

Software Engineering FundamentalsReact & UI FrameworksReal-Time Systems

Software EngineerNew Grad

Demonstrate effective AI-assisted coding workflow

In an interview where you are allowed to use an AI coding assistant, you are given a large scoped task (e.g., implementing a TCP chat server). The int...

Software Engineering FundamentalsAI-Assisted DevelopmentTesting & Quality

406 people solved

Jan 27, 2026

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Tech Interview Questions

Write SQL for post-trial conversion cohorts

Design an Enterprise Tool-Using Agent

Compute precision–recall curve on imbalanced data

Parse JSON Accounts into Typed Python Objects and Prepare Features

Inclusive Running Sums of an Integer Array

Implement basic calculator

Design Event Email System

Solve path normalization and nested iterator

Fewest Keypresses After Remapping Letters That May Repeat

Design document editor with undo/redo and batching

Prioritize Several Simultaneous High-Priority Tasks

Simulate a two-player card war game

Write SQL for video-call recipients and FR activity

Design a Game Recommendation System

Choosing Offline and Online Metrics to Evaluate a Generative AI Feature's Output

Answer Sorted Pair-GCD Position Queries

Implement a rate limiter and a pub/sub API

Design a scalable payment system

Build a Real-Time Event Feed Dashboard

Demonstrate effective AI-assisted coding workflow

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