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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 testimonial
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_ testimonial
_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"

Chris testimonial
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 testimonial
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."

Jake testimonial
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 testimonial
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."

Carlos testimonial
CarlosFull Stack, Shopify

"The solution quality is insane. It covers approach, edge cases, time complexity, follow-ups. Nothing else comes close."

boba.tea.vibes testimonial
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."

Andy testimonial
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 testimonial
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."

Shruti testimonial
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 testimonial
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."

Bianca testimonial
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 testimonial
tambrahm007

"I recently cleared Uber interviews (strong hire in the design round) and all the questions were present in prachub."

toa testimonial
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 testimonial
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_ testimonial
_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"

Chris testimonial
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 testimonial
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."

Jake testimonial
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 testimonial
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."

Carlos testimonial
CarlosFull Stack, Shopify

"The solution quality is insane. It covers approach, edge cases, time complexity, follow-ups. Nothing else comes close."

boba.tea.vibes testimonial
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."

Andy testimonial
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 testimonial
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."

Shruti testimonial
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 testimonial
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."

Bianca testimonial
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 testimonial
tambrahm007

"I recently cleared Uber interviews (strong hire in the design round) and all the questions were present in prachub."

toa testimonial
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
Meta logo
Meta
Medium
Data Scientist

Count unconnected posts and reactions

You are analyzing a newly launched feed feature intended to improve engagement by showing more unconnected content. Assume the following tables: - pos...

Data Manipulation (SQL/Python)SQL
27
2
257 people solved
Apr 5, 2026
The Trade Desk logo
The Trade Desk
Medium
Machine Learning Engineer

Design a time-travel key-field store with TTL

Problem Implement an in-memory “database” that stores records by key and fields within each key. Each operation is given a timestamp (integer, non-dec...

Coding & AlgorithmsData Structure DesignKey-Value Stores
8
0
154 people solved
Nov 19, 2025
Spotify logo
Spotify
Medium
Product Manager

Picking Spotify's Next Major Product Bet as Its Product Leader

Imagine you lead product for all of Spotify. What would you build, and why? Choose the opportunity you would invest in, explain why it beats the alter...

Product Design & StrategyProduct StrategyGrowth & Monetization
1
0
11 people solved
Jul 3, 2026
Morgan Stanley logo
Morgan Stanley
Medium
Data Scientist

Implement Factorial and Squares

Question In a live coding interview, write two Python functions and be ready to discuss their behavior. 1. factorial(n): Given a non-negative integer ...

Coding & Algorithms
12
0
88 people solved
Mar 1, 2026
Retell AI logo
Retell AI
Hard
Software Engineer

Design a Cloud Call-Center Platform for Programmatic Outbound Calls

A SaaS company offers a programmatic calling platform. Business customers (enterprises) integrate through an API: they submit a request to place an ou...

System Design
10
0
138 people solved
Jan 10, 2026
Amazon logo
Amazon
Medium
Data Scientist

Design idempotent daily loads with deduping

You need to load the last 7 days of orders into a large fact table from a noisy staging feed. Assume today is 2025-09-01. Requirements: idempotent rer...

Data Manipulation (SQL/Python)ETL & Data PipelinesData Cleaning & Wrangling
9
0
141 people solved
Oct 13, 2025
Deutsche Bank logo
Deutsche Bank
Medium
Product Manager

Open a PM interview with a short personal pitch: present, past, why here

At the start of a product manager interview, the interviewer asks you to introduce yourself. What do you say? `hint Answer the question behind the que...

Behavioral & LeadershipMotivation & Fit
0
0
5 people solved
Sep 4, 2026
Meta logo
Meta
Medium
Product Manager

Explain the Strategic Rationale Behind Launching Facebook Lite

In a product manager interview at Meta, you are asked to explain why Facebook built Facebook Lite, a separate, lightweight version of its main app. Re...

Product Design & StrategyProduct StrategyGrowth & Monetization
0
0
10 people solved
May 10, 2026
Amazon logo
Amazon
Medium
Applied Scientist

Implement K-means and solve interval/frequency tasks

Task 1 — Describe/implement K-means clustering Given: - A data matrix X with shape (n_samples, d). - An integer k (number of clusters). Explain (or wr...

Coding & AlgorithmsUnsupervised LearningIntervals & Scheduling
14
0
151 people solved
Dec 15, 2025
Pinterest logo
Pinterest
Medium
Software Engineer

Implement stream line reader and settle balances

Part 1: Streaming line reader from chunked source You are given an existing class ChunkSource with a method nextChunk() that returns the next piece of...

Coding & AlgorithmsData Structure Design
35
0
289 people solved
Sep 10, 2025
OpenAI logo
OpenAI
Medium
Software Engineer Locked

Design a multi-device calendar application

This question evaluates system design competency in scalable backend architecture, data modeling for time-range queries, synchronization and conflict-...

System DesignSystem Design FundamentalsConsistency & Availability
19
0
223 people solved
Nov 9, 2025
ByteDance logo
ByteDance
Hard
Site Reliability Engineer

Place Non-Attacking Queens

Given an integer n, return all valid configurations for placing n queens on an n x n chessboard so that no two queens attack each other. A queen attac...

Coding & Algorithms
2
0
29 people solved
Apr 19, 2026
Snapchat logo
Snapchat
Hard
Machine Learning Engineer

Design a ranking system pipeline

Answer the following ML system design questions: - Describe the machine learning system you know best. Walk through the problem definition, data sourc...

ML System Design
9
0
90 people solved
Jan 30, 2026
Jane Street logo
Jane Street
Medium
Quantitative Researcher

Minimum Common Pairwise Correlation Among Seven Identically Distributed Random Variables

Suppose $X_1, X_2, \ldots, X_7$ are seven random variables defined on the same probability space. Each has mean $0$ and variance $1$, and they are ide...

Machine Learning
12
1
111 people solved
Jul 17, 2025
Roblox logo
Roblox
Hard
Software Engineer

Design real-time game matchmaking service

Design a Real-Time Game Matchmaking Service Context You are designing the matchmaking subsystem for an online multiplayer game that supports multiple ...

System DesignMultiplayer Game SystemsAPI Design
47
0
357 people solved
Sep 6, 2025
Uber logo
Uber
Hard
Software Engineer

Design a search autocomplete system

Design a Search Autocomplete System Design a planet-scale search autocomplete (type-ahead) service. As a user types into a search box, the service ret...

System DesignSearch & Feed SystemsCaching
26
0
359 people solved
Jul 15, 2025
Meta logo
Meta
Hard
Software Engineer

Design a price tracking system

Question Design a price tracking system for e-commerce sites (similar to price-history tools such as CamelCamelCamel or Keepa). The system ingests pro...

System DesignETL & Data PipelinesAPI Integration & HTTP Clients
23
0
239 people solved
Sep 6, 2025
CloudKitchens logo
CloudKitchens
Medium
Software Engineer

Design a menu manager with enums

Design and implement a console-based restaurant menu management program. Requirements: ( 1) There are exactly three fixed item categories represented ...

Coding & AlgorithmsLow-Level Design (OOP)Data Structure Design
14
0
143 people solved
Sep 6, 2025
Voleon logo
Voleon
Hard
Data Scientist

Design and diagnose a regression pipeline

CLV_90 Prediction Pipeline under Zero-Inflation, Heavy Tails, and Multicollinearity Context You need to predict 90-day customer value (CLV_90) at the ...

Machine LearningRegression & Statistical ModelingFeature Engineering
64
0
469 people solved
Oct 13, 2025
Uber logo
Uber
Medium
Software Engineer Locked

Design a Daily Puzzle Platform

This question evaluates backend system-design skills including API design, data modeling, service decomposition, scaling and consistency trade-offs, s...

System DesignSystem Design FundamentalsAPI Design
6
0
88 people solved
Apr 19, 2026
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