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Tech Interview Questions

Practice the exact questions companies are asking right now.

Questions
150
Companies
569
Updated
10.14.2026
150 Questions 569 Companies10.14.2026
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 50 results
Google logo
Google
Hard
Software Engineer Locked

Design street-view image ingestion and storage system

This question evaluates understanding of large-scale system design for media ingestion, covering distributed ingestion pipelines, durable storage and ...

System DesignFile & Media StorageAuthentication & Authorization
29
0
311 people solved
Jan 22, 2026
OpenAI logo
OpenAI
Medium
Software Engineer

Design webhook, POI, chat, CI/CD, payments

You are asked to design several large-scale backend systems in a single onsite session. The bar is breadth and judgment under time pressure: for each ...

System DesignSystem Design FundamentalsDistributed Transactions & Idempotency
26
0
405 people solved
Jul 4, 2025
Anthropic logo
Anthropic
Medium
Software Engineer Locked

Design a One-on-One Chat Service

This question evaluates the ability to design a scalable, real-time one-on-one messaging service, probing distributed systems concepts, data modeling,...

System DesignReal-Time Systems
228
1
1544 people solved
May 31, 2026
Anthropic logo
Anthropic
Hard
Software Engineer

Design a scalable, reliable system

System Design: Global Photo/Video File Storage and Sharing ("CloudDrive") Context Design a scalable, highly reliable consumer service where users uplo...

System DesignFile & Media StorageStorage & Sharding
43
0
426 people solved
Sep 6, 2025
Pinterest logo
Pinterest
Hard
Software Engineer

Design a Google Photos–like service

System Design: Google Photos–like Service (Web + Mobile) Context Design a large-scale consumer media service that ingests, stores, indexes, and serves...

System DesignFile & Media StoragePrivacy & Compliance
15
0
255 people solved
Sep 6, 2025
Anthropic logo
Anthropic
Hard
Software Engineer

Design a prompt playground

Design a prompt playground for developers and prompt engineers. The product lets users write prompts, choose model settings, run prompts against AI mo...

System DesignSystem Design FundamentalsLLM Applications
407
1
4051 people solved
May 24, 2026
Salesforce logo
Salesforce
Hard
Software Engineer

Design secure Kubernetes with CI/CD

Kubernetes Architecture, Troubleshooting, Security, and CI/CD (GKE/EKS) Context: You are the on-call software engineer for a managed Kubernetes cluste...

System Design
4
0
74 people solved
Sep 6, 2025
Rippling logo
Rippling
Medium
Software Engineer

Design a personalized news aggregator

Design a Google News-style personalized news aggregator. The system continuously collects articles from many third-party publishers by polling their A...

System DesignSearch & Feed Systems
38
1
610 people solved
Apr 19, 2026
Microsoft logo
Microsoft
Hard
Software Engineer Locked

Solve Throughput, Rate Limiting, and LFU

This set of tasks evaluates algorithmic problem-solving, data structure design, and systems-oriented reasoning by testing throughput calculation, roll...

Coding & AlgorithmsData Structure DesignRate Limiting
13
0
117 people solved
Mar 20, 2026
IXL Learning logo
IXL Learning
Medium
Software Engineer

Design game credit system with add/spend/refund APIs

System Design Prompt: Game Credit System with Add, Spend, and Refund APIs You are designing a backend service to manage virtual game credits for one o...

System DesignPayments & LedgersDistributed Transactions & Idempotency
13
0
104 people solved
Jul 2, 2025
Salesforce logo
Salesforce
Hard
Software Engineer

Compare cloud compute; design Kubernetes security and CI/CD

Compare cloud compute; design Kubernetes security and CI/CD Cloud Compute Models, Testing Strategies, Kubernetes Deep Dive, Security, and CI/CD to GKE...

System Design
3
0
72 people solved
Jul 31, 2025
Anthropic logo
Anthropic
Medium
Software Engineer

Design GPU inference request batching

Design a system that serves online model-inference requests on GPUs. Requests arrive one at a time from clients, but GPU throughput is far higher when...

ML System DesignLLM Inference & Serving
142
0
2032 people solved
Mar 13, 2026
League logo
League
Medium
Software Engineer

Design scalable insurance claims processing system

Design an end-to-end insurance claims processing system for a health-focused insurer. The system handles a claim's full lifecycle — from submission, t...

System DesignSystem Design FundamentalsDistributed Transactions & Idempotency
34
0
232 people solved
Oct 17, 2025
OpenAI logo
OpenAI
Medium
Frontend Engineer

Design a ChatGPT Playground

Design a web-based AI playground — a prompt-testing console similar to the OpenAI / ChatGPT Playground. A signed-in user types a prompt, picks a model...

System DesignState ManagementLLM Applications
34
0
295 people solved
Apr 25, 2026
Amazon logo
Amazon
Medium
Software Engineer AI

Debug Watch List Movie Operations

You are given a full-stack Movie DB application. Users can log in, create, update, and delete watch lists, and add or remove movies from a watch list....

Software Engineering FundamentalsDebugging
1185
7
12449 people solved
Jun 12, 2026
Lowe's logo
Lowe's
Hard
Software Engineer

Explain cloud computing fundamentals

Explain cloud computing fundamentals Design a Cloud-Native, Horizontally Scalable, Fault-Tolerant Web Application for Millions of Users Context You ar...

System Design
4
0
39 people solved
Aug 10, 2025
Databricks logo
Databricks
Medium
Software Engineer Locked

Design a stock order manager

This question evaluates a candidate's ability to model and manage order lifecycle and state reconciliation, along with understanding of distributed-sy...

System DesignDistributed Transactions & IdempotencyAPI Integration & HTTP Clients
108
0
1041 people solved
Apr 12, 2026
Anthropic logo
Anthropic
Hard
Software Engineer

Design a desktop AI chat frontend

Design a Frontend Architecture for a Cross-Platform Desktop Conversational AI App Context You are designing the frontend architecture for a cross-plat...

System DesignState ManagementReal-Time Systems
53
0
1062 people solved
Sep 6, 2025
Notion logo
Notion
Medium
Software Engineer Locked

Design a Shared Calendar Service

Covers designing a shared calendar service: the database schema for events and recurring rules, reminders, and multi-user sharing and permissions. Inc...

System DesignSystem Design FundamentalsStorage & Sharding
55
0
489 people solved
Jun 1, 2026
Salesforce logo
Salesforce
Medium
Software Engineer

Compare GCP vs AWS and testing strategy

Public Cloud Building Blocks, Compute Choice, and Testing Strategy Context Assume you are designing a new stateless HTTP microservice that exposes RES...

System Design
4
0
73 people solved
Sep 6, 2025
ByteDance logo
ByteDance
Medium
Software Engineer Locked

Design an Asynchronous Video Moderation Pipeline with ML Risk Scores and a Rules Engine

Design an asynchronous video moderation pipeline that scores published videos with many ML risk models, applies configurable rules to the scores, and ...

System DesignSystem Design FundamentalsFault Tolerance & Failover
1
0
12 people solved
Sep 6, 2026
DoorDash logo
DoorDash
Medium
Software EngineerSenior+ Locked

Design a Food Rating System

This question evaluates skills in system design, data modeling, consistency and transactional guarantees, idempotency, scaling, and designing read-hea...

System DesignSystem Design FundamentalsDistributed Transactions & Idempotency
68
0
868 people solved
Jun 5, 2026
Harvey logo
Harvey
Medium
Software Engineer Locked

Design a Secure PDF Data Room

This question evaluates a candidate's mastery of system design and secure authorization models for multi-tenant file-sharing platforms, focusing on or...

System DesignAuthentication & AuthorizationSystem Design Fundamentals
66
0
628 people solved
Apr 20, 2026
OpenAI logo
OpenAI
Hard
Software Engineer Locked

Design a Distributed Crossword Solver

This question evaluates competency in distributed systems design, algorithmic search and constraint satisfaction (e.g., DFS with constraint propagatio...

System DesignJob Scheduling & WorkflowsBacktracking & Recursion
61
0
992 people solved
May 12, 2026
Instacart logo
Instacart
Medium
Software Engineer

Add Hold-Available and Loan Due-Date Notifications to a Library Lending System

You are working in an existing full-stack Library Lending System repository: a backend API, a frontend, and a test suite that already passes. A produc...

Software Engineering FundamentalsDistributed Transactions & IdempotencyJob Scheduling & Workflows
2
0
29 people solved
Sep 3, 2026
OpenAI logo
OpenAI
Hard
Software Engineer

Design a GPT chat UI with snapshots and sharing

System Design: End-to-End Web App for Interacting with a GPT-like Model Context You are designing a multi-tenant, browser-based SaaS application that ...

System DesignReal-Time SystemsLLM Applications
20
0
243 people solved
Sep 6, 2025
Robinhood logo
Robinhood
Medium
Frontend Engineer

Design a Photo Album App

Design a web-based photo album application for the browser (a frontend-focused system design). The product has three main screens, each provided to yo...

System DesignState ManagementReact & UI Frameworks
11
0
185 people solved
Apr 5, 2026
Meta logo
Meta
Hard
Software Engineer

Design a Dropbox-like file storage and sync service

Design a Dropbox-like file storage and sync service Design a cloud file storage and synchronization service like Dropbox / Google Drive. The system sh...

System Design
13
0
102 people solved
Jul 15, 2025
Waymo logo
Waymo
Medium
Software Engineer

Design a Matchmaking Service With Join, Cancel, Matching, Notification and Expiry

Design a matchmaking service for an online game. The service must support: - joining the matchmaking queue; - cancelling a matchmaking request; - matc...

System DesignMultiplayer Game SystemsDistributed Coordination
2
0
28 people solved
Sep 10, 2026
Fora Travel logo
Fora Travel
Easy
Software Engineer Locked

Design a Hierarchical Learning Content API

Design a track-module-lesson API with normalized ownership, stable ordering, bounded hierarchy queries, transactional edits, and version-aware caching...

System Design
14
0
121 people solved
Aug 31, 2026
Airwallex logo
Airwallex
Medium
Frontend Engineer

Design a Reusable React Autocomplete Input: API, Portals, Debounce and Caching

Design an autocomplete search input for a web application: a text field that shows matching suggestions in a popup as the user types and lets the user...

System DesignUI Components & AccessibilityReact & UI Frameworks
1
0
7 people solved
Aug 31, 2026
Pinterest logo
Pinterest
Medium
Software Engineer

Design highly available blob storage service

Design a large-scale, highly available blob storage service similar to Amazon S3. The service should allow clients to store, retrieve, and delete arbi...

System DesignFile & Media StorageFault Tolerance & Failover
37
0
295 people solved
Sep 10, 2025
Anthropic logo
Anthropic
Medium
Software Engineer

Design Model Weight Distribution

Design a system that distributes large machine learning model weight files to a fleet of GPU inference workers. A new model version is published as on...

ML System DesignSystem Design FundamentalsFile & Media Storage
75
0
555 people solved
Apr 19, 2026
Rippling logo
Rippling
Hard
Software Engineer

Design a user behavior tracking system

Problem Design a User Behavior Tracking System that collects and analyzes user events from mobile and web applications across multiple products. The s...

System DesignSystem Design FundamentalsData Ingestion & CDC
136
0
920 people solved
Feb 11, 2026
Moody's logo
Moody's
Medium
Software Engineer Locked

Design a Product Inventory and Pricing Service

Design a read-heavy product, price, and inventory service that remains fast for browsing without weakening checkout correctness. The exercise compares...

System Design
2
0
25 people solved
Jul 25, 2026
Chicago Trading Company logo
Chicago Trading Company
Medium
Software EngineerNew Grad Locked

Implement a Unique Pointer and Vector

This question evaluates understanding of C++ resource management, RAII, ownership and object lifetime semantics, move versus copy semantics, exception...

Software Engineering Fundamentals
11
0
85 people solved
Jun 10, 2026
Parafin logo
Parafin
Hard
Software Engineer

Design loan application system

Design an End-to-End Loan Application Platform You are a software engineer at a small lending startup. Design a scalable, compliant loan origination s...

System DesignSystem Design FundamentalsDistributed Transactions & Idempotency
76
0
546 people solved
Aug 4, 2025
Lyft logo
Lyft
Hard
Software Engineer

Design a scalable news feed system

Design the backend for a social app's news feed You are designing the backend that powers a mobile social app's home feed (a Twitter/Instagram-style h...

System DesignSearch & Feed SystemsCaching
35
0
280 people solved
Jul 27, 2025
Airbnb logo
Airbnb
Hard
Software Engineer

Design a group chat system

Question Design the backend for a real-time group chat / messaging system at Airbnb scale — the in-app messaging that connects guests and hosts, inclu...

System DesignReal-Time Systems
23
0
271 people solved
Jan 19, 2026
Amazon logo
Amazon
Hard
Software Engineer

Evaluate actions in Amazon simulation

Evaluate actions in Amazon simulation Amazon Work Simulation: Purpose, Modules, and Design Decisions Context and Assumptions The Work Simulation is a ...

Behavioral & LeadershipSystem Design FundamentalsCommunication & Stakeholders
121
1
625 people solved
Jul 29, 2025
Amazon logo
Amazon
Medium
Software EngineerIntern Locked

Validate AI-Generated Code Safely

This question evaluates experience with generative AI tools and the competency in validating AI-generated code for correctness, maintainability, and s...

Software Engineering FundamentalsAI-Assisted DevelopmentTesting & Quality
129
1
1087 people solved
May 11, 2026
Amperity logo
Amperity
Hard
Software Engineer

Design a Read-Once Password Sharing Service

Design a service for sharing a password with another person, where the shared password can be read only once. The sender submits the password and rece...

System DesignApplication SecurityCryptography
0
0
7 people solved
Sep 9, 2026
Dropbox logo
Dropbox
Medium
Data Scientist Locked

Design enterprise file recommendations under ACLs

Design a recommender that suggests the next files an enterprise user will open in a productivity suite, serving many tenants from shared infrastructur...

Machine Learning
2
0
34 people solved
Oct 13, 2025
Amazon logo
Amazon
Hard
Software Engineer

Design delayed job scheduler (LLD)

Design a Delayed Job Scheduler (Low-Level Design) Design a service that schedules a job to execute X seconds in the future with second-level accuracy....

System DesignJob Scheduling & WorkflowsLow-Level Design (OOP)
50
0
686 people solved
Aug 7, 2025
Glean logo
Glean
Medium
Frontend Engineer

Build a React Social Feed with Upvote/Downvote Re-Sorting and Pinned Posts

In a two-hour round of a frontend engineer loop, the task was to build a social feed page in React with two features: - Upvote / Downvote. Each post c...

Software Engineering FundamentalsReact & UI FrameworksState Management
2
0
23 people solved
Sep 30, 2026
MongoDB logo
MongoDB
Medium
Software EngineerSenior+ Locked

Explain Modern Python Features and Ecosystem

This question evaluates a candidate's expertise in modern Python language features, the surrounding ecosystem of libraries and frameworks, GUI toolkit...

Software Engineering FundamentalsProgramming LanguagesConcurrency
4
0
79 people solved
May 21, 2026
Crusoe logo
Crusoe
Easy
Software Engineer Locked

Design a Slack-Like Messaging Platform

This question evaluates a candidate's competency in designing scalable, low-latency distributed messaging architectures, covering conversation modelin...

System DesignReal-Time SystemsMessaging & Event-Driven
29
0
306 people solved
May 2, 2026
OpenAI logo
OpenAI
Medium
Software Engineer Locked

Design Slack-like multi-tenant global messaging system

This question evaluates a candidate's ability to design large-scale, multi-tenant real-time messaging systems, testing competencies in distributed sys...

System DesignReal-Time SystemsAuthentication & Authorization
21
0
157 people solved
Dec 1, 2025
OpenAI logo
OpenAI
Hard
Software Engineer

Design a CI/CD pipeline with scheduler

Design a production-grade CI/CD pipeline (with its job scheduler) You are designing the internal CI/CD platform for a large engineering organization t...

System DesignJob Scheduling & WorkflowsCI/CD & Deployment
115
0
1566 people solved
Aug 13, 2025
Netflix logo
Netflix
Hard
Software Engineer

Design an ad frequency capping system

Design a real-time ad frequency capping system for an ads platform. When the ad server is deciding whether to show an ad to a user, it must enforce ca...

System DesignAds SystemsRate Limiting
224
0
1752 people solved
Mar 9, 2026
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