Software Engineer System Design Interview Questions
Practice 904 real System Design interview questions for Software Engineer roles. From companies including Meta, OpenAI, Amazon, Anthropic, Google.
"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"
"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"
"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."
"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."
"Got a Google recruiter call on Monday, interview on Friday. Crammed PracHub for 4 days. Passed every round. This platform is a miracle worker."
"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."
"The solution quality is insane. It covers approach, edge cases, time complexity, follow-ups. Nothing else comes close."
"Legit the only resource you need. TC went from 180k -> 350k. Just memorize the top 50 for your target company and you're golden."
"PracHub Premium for one month cost me the price of two coffees a week. It landed me a $280K+ starting offer."
"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."
"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."
"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."
"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."
"I recently cleared Uber interviews (strong hire in the design round) and all the questions were present in prachub."
"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."
Design a Crash-Resilient LRU Cache
You have an in-memory LRU cache with fixed capacity $N$ and the standard get(key) / put(key, value) operations, both $O(1)$ (a hash map plus a doubly ...
Design a news aggregator system
Rippling Onsite — Two Parts This Software Engineer onsite has two parts: a system design and a short coding follow-up. Both are below. Treat them as o...
Design a Secure Copilot API
Design a secure API for an enterprise AI copilot product. The product serves many independent organizations (tenants). Authenticated end users send pr...
Design a Layover Activity Recommendation App
You are designing a mobile app for travelers who have free time during an airport layover. The app should recommend useful activities the traveler can...
Design a Library Management System (API and Schema)
Design the API and database schema for a library management system. The library lends physical books to registered members. Members can search the cat...
Design Real-Time Driver Pay Aggregation
Design a production system that ingests a high-volume stream of delivery-order events and continuously computes each driver's (Dasher's) daily pay. Th...
Design a Server Metrics Monitor
Design a server metrics monitoring system that periodically pulls metrics from a fleet of servers and makes them available for dashboards and alerting...
Design a DAU/MAU metrics system
Question Design a system that computes and serves product engagement metrics — DAU (Daily Active Users) and MAU (Monthly Active Users) — for a large c...
Design Search And Web Crawling Systems
You are asked to design two distinct large-scale systems in a single system-design interview loop: a Facebook-like search product and a distributed we...
Design an RBAC Relational Schema
Design a relational database schema for role-based access control (RBAC). Your design should model the following concepts: - User: a person or service...
Design a stock order manager
Design an order management service (OMS) for stock buy and sell requests. The system does not match trades itself. Instead, it integrates with a singl...
Design a disk-backed KV store under contention
Design a Disk-Backed Key–Value Store Under Contention Design a single-node key–value store with the following two defining characteristics: - Large va...
Design fulfillment truck routing and inventory system
Scenario You are designing the software platform for a large e-commerce fulfillment network that plans truck routes and manages container/inventory mo...
Design a one-to-one chat system
Design a one-to-one (1:1) chat system for a web application — the kind of direct-messaging feature where two users can send each other text messages i...
Design Collaborative Document Editing
Design a web-based collaborative document editing system similar to Google Docs. The system should allow multiple users to create, edit, and share ric...
Design a Hosted Notebook Platform
Design a hosted notebook platform for interactive code execution — a cloud-based notebook service in the spirit of Google Colab, Deepnote, or Hex — wh...
Design a Real-Time Chat System
Design a Real-Time Chat System Design the backend for a real-time one-to-one and group messaging application (think a 1:1 and small-group chat product...
Design a Distributed Logging System
Design a Distributed Logging System You are asked to design a distributed logging system for a large microservices platform (think of a ride-hailing c...
Design a Donation Platform
Question Design an online donation platform that lets users discover and contribute to charity campaigns or nonprofit organizations. Payment execution...
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...