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Tech Interview Questions

Practice the exact questions companies are asking right now.

Questions
50
Companies
569
Updated
10.14.2026
50 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
Apple logo
Apple
Hard
Software Engineer

Implement a robust REST API method

Implement a robust REST API method Design and implement a REST API method to create a resource with idempotency Context You are building a create endp...

System DesignAPI DesignDistributed Transactions & Idempotency
32
0
247 people solved
Jul 15, 2025
Motive logo
Motive
Medium
Software Engineer

Fetch and parse JSON from REST API

Question Set up a minimal coding environment from scratch and write runnable code that fetches and processes data from a REST API. You are given an en...

Data Manipulation (SQL/Python)API Integration & HTTP Clients
14
0
113 people solved
Aug 13, 2025
Snowflake logo
Snowflake
Hard
Software Engineer

Design a REST API Abstraction Layer

Design a REST API Abstraction Layer (Internal Service-Client SDK) A company runs many application servers that call internal REST services. Today, eve...

System DesignAPI DesignAPI Integration & HTTP Clients
38
0
314 people solved
Apr 5, 2026
Turo logo
Turo
Medium
Software Engineer

Design trip booking REST API and schema

Design a RESTful API for a guest to book a trip. Include: - Core endpoints (search availability, create booking, view/cancel booking, payment/confirma...

System DesignAPI DesignIndexing & Query Performance
12
0
140 people solved
Feb 12, 2026
Atlassian logo
Atlassian
Medium
Software Engineer

Design a tagging system and REST APIs

Design a tagging system (similar to tagging pages/issues) with a strong focus on REST API design. Functional requirements: - Create a tag. - Rename a ...

System DesignAPI DesignSystem Design Fundamentals
16
1
139 people solved
Jan 5, 2026
Microsoft logo
Microsoft
Medium
Software Engineer Locked

Design REST APIs for JSON file storage

This question evaluates system design and RESTful API skills for building JSON document storage, covering metadata modeling, concurrency control, auth...

System DesignAPI DesignFile & Media Storage
7
0
127 people solved
Jan 22, 2026
Microsoft logo
Microsoft
Medium
Software Engineer

Design an Online Tic-Tac-Toe Service with REST-Only APIs, Matchmaking and Multi-Region

Design an online Tic-Tac-Toe game. Two players are paired through online matchmaking and then play a game against each other, each from their own devi...

System DesignMultiplayer Game SystemsAPI Design
1
0
11 people solved
Aug 4, 2026
NVIDIA logo
NVIDIA
Hard
Data Scientist

Design and secure a REST inference API

Design a REST API for Image Inference with Grad-CAM You are designing a public REST API for an image-inference service that accepts large images and r...

Coding & Algorithms
5
0
85 people solved
Oct 13, 2025
Microsoft logo
Microsoft
Medium
Software Engineer Locked

Design a To-Do List Service (CRUD, Auth, Rate Limiting, Caching & API Versioning)

This system design question evaluates practical full-stack architectural thinking across REST API design, authentication, rate limiting, and caching i...

System DesignSystem Design FundamentalsAPI Design
15
0
200 people solved
Jun 11, 2026
Cresta logo
Cresta
Medium
Software Engineer

Build a Tool-Calling Chat Agent That Searches and Books Flights via a REST API

In an AI-assisted coding round, you are given an API document (api.md) and a starter script (agent_starter.py). Using AI assistance, implement an AI a...

Software Engineering FundamentalsAPI Integration & HTTP ClientsAI Agents
9
0
137 people solved
Sep 23, 2026
Verkada logo
Verkada
Medium
Software Engineer

Implement a Middle-Tier REST API Server for Camera Log Ingestion and Queries

Cameras produce logs. Implement the middle-tier API server that sits between users and cameras: cameras send their logs to the server, and users send ...

Software Engineering FundamentalsAPI DesignConcurrency
4
0
62 people solved
Sep 8, 2026
Snapchat logo
Snapchat
Hard
Software Engineer

Design product co-occurrence analytics API

Design RESTful APIs for Co‑Purchase Analytics Context You are designing backend APIs to power a "related products" module based on co‑purchase behavio...

System Design
5
0
79 people solved
Sep 6, 2025
R
Reinforce Labs
Medium
Software Engineer Locked

Design a REST GET API to fetch DB records

This question evaluates a candidate's competency in RESTful API design, HTTP semantics, database querying and schema considerations, pagination and fi...

System Design
2
0
32 people solved
Jan 8, 2026
TikTok logo
TikTok
Easy
Software Engineer Locked

Design automated regression tests for an API

This question evaluates proficiency in designing automated regression test suites for RESTful APIs, performance verification and monitoring, end-to-en...

Software Engineering Fundamentals
11
0
79 people solved
Feb 12, 2026
Cloverhealth logo
Cloverhealth
Medium
Software Engineer Locked

Design appointment scheduling data model and APIs

This question evaluates backend data modeling, REST API design, and enforcement of domain constraints within a web framework, focusing on scheduling, ...

System Design
2
0
37 people solved
Feb 5, 2026
Amazon logo
Amazon
Hard
Software Engineer Locked

Design a Library Management System (API and Schema)

This question tests practical system design skills by requiring candidates to model a relational data schema and REST API for a library lending system...

System DesignSystem Design FundamentalsTransactions & Isolation
27
0
223 people solved
Jun 14, 2026
Amazon logo
Amazon
Hard
Software Engineer

Design a URL shortening platform

Design a Scalable URL Shortening Platform Context Build a Bitly-like URL shortener that maps long URLs to short codes and performs HTTP redirection re...

System DesignSystem Design FundamentalsAPI Design
19
0
212 people solved
Sep 6, 2025
Coinbase logo
Coinbase
Hard
Software Engineer

Design real-time exchange data sync system

Design real-time exchange data sync system System Design: Real-Time Multi-Exchange Stock Data Ingestion and Live Web Page Context You are asked to des...

System DesignTrading SystemsData Ingestion & CDC
6
0
124 people solved
Jul 26, 2025
Instacart logo
Instacart
Hard
Software Engineer

Design cloud storage with quotas and compression

System Design: Multi‑Tenant Cloud Storage Service (Take‑Home) You are tasked with designing a multi‑tenant cloud storage service that supports file up...

System DesignFile & Media StorageAPI Design
18
0
133 people solved
Sep 6, 2025
TikTok logo
TikTok
Hard
Software Engineer

Design a global notification service

Design a global notification service System Design: Globally Distributed Notification Service Context You are designing a multi-tenant notification pl...

System DesignSystem Design FundamentalsFault Tolerance & Failover
13
0
95 people solved
Jul 17, 2025
Amazon logo
Amazon
Medium
Applied Scientist

Design an S3-like object storage service

Design a cloud object storage service similar to Amazon S3. The service should allow clients to upload, store, and download large files reliably and e...

System DesignFile & Media StorageStorage & Sharding
50
0
470 people solved
Dec 8, 2025
Amazon logo
Amazon
Hard
Software Engineer

Design a cloud storage service

Design a cloud storage service System Design: Cloud Document Storage and Sharing Service Context Design the backend for a large-scale cloud document s...

System Design
12
0
85 people solved
Aug 7, 2025
Rippling logo
Rippling
Hard
Software Engineer

Design a real-time delivery dashboard

System Design: Real-Time Delivery Operations Dashboard Context Design a real-time operations dashboard for a two-sided delivery platform. The dashboar...

System DesignReal-Time SystemsGeo & Delivery Systems
46
0
423 people solved
Sep 6, 2025
NVIDIA logo
NVIDIA
Hard
Data Scientist

Design and explain robust web APIs for ML inference

Design an HTTP API for Image-Based Model Predictions Context: Design an HTTP REST API that serves predictions for image inputs (e.g., classification, ...

Coding & Algorithms
4
0
80 people solved
Oct 13, 2025
Retool logo
Retool
Hard
Software Engineer

Design car rental schema and APIs

System Design: Car Rental Platform Design the backend for a car rental platform (think a regional chain like Hertz or Enterprise). The system lets cus...

System DesignSystem Design FundamentalsStorage & Sharding
21
0
214 people solved
Jul 26, 2025
Bnsf logo
Bnsf
Medium
Software Engineer

Implement CRUD API and tests

You are given two software-engineering tasks. 1. Implement a simple REST API for a resource such as Note or Message. - Support basic CRUD operation...

Software Engineering FundamentalsAPI DesignTesting & Quality
30
0
267 people solved
Jan 15, 2026
Bnsf logo
Bnsf
Medium
Software Engineer

Implement a rail freight quote API service layer and scale it for slow dependencies

You receive a requirements document in Markdown for a REST API: a price-quote endpoint for rail freight shipments. Serving a quote requires calls to o...

Software Engineering FundamentalsFault Tolerance & FailoverCaching
3
1
62 people solved
Sep 17, 2026
Confluent logo
Confluent
Hard
Software Engineer

Design a temporary email service

Design a Disposable Email Service with Auto-Expiring Addresses Design a receive-only disposable email service (e.g., 10‑minute inboxes) that issues au...

System DesignSystem Design FundamentalsPrivacy & Compliance
166
0
1279 people solved
Jul 27, 2025
Atlassian logo
Atlassian
Medium
Software Engineer

Design an access control system (RBAC + resource-based)

Design an authorization system that supports both: - Role-Based Access Control (RBAC): users/groups have roles (e.g., Admin, Editor, Viewer) that gran...

System DesignAuthentication & AuthorizationAPI Design
24
1
198 people solved
Jan 5, 2026
Netflix logo
Netflix
Easy
Machine Learning Engineer Locked

Design an ML Platform Portal

This question evaluates design and engineering skills for building an end-to-end machine learning platform, including experiment tracking, model regis...

ML System DesignMLOps & Model ServingModel Monitoring & Drift
10
0
109 people solved
Feb 23, 2026
Atlassian logo
Atlassian
Medium
Software Engineer

Store a hierarchy and return all children

Design a service to store a hierarchical tree of nodes and expose APIs. Requirements: - Persist a hierarchy (a forest with multiple roots is acceptabl...

System Design
8
1
123 people solved
Jan 5, 2026
Airbnb logo
Airbnb
Hard
Software Engineer

Design a multi-channel notification system

System Design: Multi-Channel Notifications (Email, SMS, Push, In‑App) Context Design a notification platform that reliably delivers messages across mu...

System DesignSystem Design FundamentalsMessaging & Event-Driven
11
0
220 people solved
Sep 6, 2025
SoFi logo
SoFi
Hard
Software Engineer

Implement a React CRUD Table

Implement a React CRUD Table React CRUD Data Table — Build and Explain Context Design and implement a React application that renders a data table with...

Software Engineering FundamentalsReact & UI FrameworksState Management
19
0
144 people solved
Jul 16, 2025
Databricks logo
Databricks
Hard
Software Engineer Locked

Design CRUD APIs with async jobs

This question evaluates a candidate's ability to design backend services that combine CRUD operations with asynchronous background job processing, emp...

System DesignSystem Design FundamentalsAPI Design
28
0
359 people solved
Jan 7, 2026
Airbnb logo
Airbnb
Hard
Software Engineer

Design a hot-listing waitlist API

Design a hot-listing waitlist API System Design: Waitlist API for High-Demand Listings Context You are designing a waitlist system for a marketplace t...

System DesignSystem Design FundamentalsAPI Design
29
0
272 people solved
Jul 16, 2025
Snowflake logo
Snowflake
Hard
Software Engineer Locked

Design an Automated Jira-Ticket-to-PR System

This system design question evaluates expertise in distributed systems, asynchronous job processing, and queue-based architecture. It tests practical ...

System DesignJob Scheduling & WorkflowsMessaging & Event-Driven
22
0
203 people solved
Jun 15, 2026
Databricks logo
Databricks
Hard
Software EngineerNew Grad Locked

Design a digital game shop backend

This question evaluates system design skills including transactional data modeling, API design, service decomposition, and reliability concerns for mo...

System DesignPayments & LedgersDistributed Transactions & Idempotency
56
0
399 people solved
Dec 10, 2025
Fidelity logo
Fidelity
Medium
Software Engineer

Write good tests and define integration tests

Write good tests and define integration tests Test Design: Definitions, Trade-offs, and Best Practices Context You're building a small service for a t...

Software Engineering Fundamentals
6
0
71 people solved
Jul 31, 2025
Expedia logo
Expedia
Hard
Software Engineer

Design a listing connectivity ingestion service

Scenario You are designing a Connectivity Service that allows external service providers (partners) to create or update listings in your company’s pla...

System DesignAPI DesignAuthentication & Authorization
6
0
121 people solved
Nov 5, 2025
TikTok logo
TikTok
Hard
Software Engineer

Design a reusable React comment component

Design and Implement a Reusable Comment Input-and-Feed Component in React Goal Build a reusable React component that provides a comment input and feed...

System Design
10
0
82 people solved
Sep 6, 2025
Tesla logo
Tesla
Medium
Software Engineer

Explain HTTP methods and your usage

Explain HTTP methods and your usage HTTP Methods, Idempotency, Safety, and Practical Use Context You design and consume RESTful APIs for high-throughp...

System DesignAPI DesignDistributed Transactions & Idempotency
18
0
135 people solved
Jul 26, 2025
Roblox logo
Roblox
Hard
Software Engineer

Design a scheduled payment system

System Design: Scheduled Payment Service Context You are designing a backend service that allows end users to: - Schedule a payment for a future date/...

System DesignPayments & LedgersDistributed Transactions & Idempotency
33
0
472 people solved
Sep 6, 2025
Coinbase logo
Coinbase
Hard
Software Engineer

Design scheduled payments and cancellation

Question Design a scheduled payments service for Coinbase that lets users create, list, update, execute, and cancel future-dated payments — both one-t...

System DesignPayments & LedgersDistributed Transactions & Idempotency
10
0
181 people solved
Sep 6, 2025
Heygen logo
Heygen
Medium
Software Engineer AI Locked

Build a GPU VM Fleet CLI

This question evaluates competency in designing provider-agnostic tooling for managing GPU virtual machines and fleets, covering API integration, life...

Software Engineering Fundamentals
5
0
57 people solved
Jun 5, 2026
Coinbase logo
Coinbase
Medium
Software Engineer

Design a blob storage system for lunar environment

You are asked to design a blob storage system deployed on a lunar base. The interviewer is intentionally making the environment unusual (the Moon) to ...

System DesignFile & Media StorageConsistency & Availability
15
0
202 people solved
Dec 8, 2025
Brex logo
Brex
Medium
Software Engineer

Build AI-Assisted Full-Stack Transactions App

Build a minimal full-stack app for monetary transactions This is the "AI coding" round: using an AI coding tool of your choice (e.g., Cursor), build a...

System DesignPayments & LedgersAI-Assisted Development
77
1
846 people solved
Aug 14, 2025
Amazon logo
Amazon
Hard
Software Engineer

Design an extensible ticketing system

System Design: Extensible EventTicketSystem Context Design a ticketing platform that sells tickets for concerts, movies, and sports. The system must s...

System Design
11
0
83 people solved
Sep 6, 2025
OpenAI logo
OpenAI
Hard
Software Engineer

Design a fullstack app with frontend focus

Design a fullstack app with frontend focus Design a Full‑Stack Web Application (Frontend Emphasis) Context You are given a 2–3 page requirements docum...

System DesignReact & UI FrameworksAPI Design
21
0
173 people solved
Jul 27, 2025
Microsoft logo
Microsoft
Hard
Software Engineer

Design an image upload/download service

System Design: Image Upload and Download Service Context Design a production-grade image service used by web and mobile clients. The service must supp...

System DesignFile & Media StorageAPI Design
14
0
122 people solved
Sep 6, 2025
Dropbox logo
Dropbox
Medium
Software Engineer

Design file-processing API with long-running jobs

You are asked to design an HTTP-based API and high-level backend architecture for processing files in a cloud storage service (similar to a simplified...

System DesignJob Scheduling & WorkflowsAPI Design
11
0
144 people solved
Nov 1, 2025
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