Software Engineer System Design Interview Questions
Practice 896 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 Cloud DevBox Platform
Design a cloud DevBox platform: a service that provides developers with disposable or persistent remote development machines accessible through a brow...
Design a Cron Job Scheduler
Design a job scheduler service with effectively unlimited worker capacity. The system must support: - Recurring jobs defined by cron-style schedules -...
Design an Uber Eats Cart Service
Design the shopping cart service for a food delivery platform similar to Uber Eats. The service should allow customers to add, update, and remove menu...
Design Nearby Restaurant Search
Design a backend system for searching nearby restaurants. Users open a mobile app and want to find restaurants near their current location. The system...
Design a one-to-one chat system
Design a one-to-one chat system for a web application. Assumptions: - Each user is active on at most one browser device at a time. - Group chat is out...
Design a coffee ordering system
System Design: Coffee Ordering System Design a system for a coffee shop (or chain) that supports ordering drinks. Core use cases - Customer browses me...
Design a Scalable News Feed
Design a large-scale social news feed service. Users can: - create posts, - follow and unfollow other users, - open the app to see a personalized home...
How to stream a large file to 1000 hosts fastest
Problem You need to distribute a very large file stored in cloud object storage to 1000 servers in a data center. - The WAN link from cloud storage → ...
Design an Online Judge and Live Comments
The onsite included two system design prompts: 1. Design an online judge platform where users submit code for programming problems. The system must su...
Design a File Backup System
Design a scalable file backup system. You are given access to basic file-system primitives such as listing directories, reading file metadata, reading...
Design a typeahead search service
Design a search autocomplete system for a large application. As a user types a prefix, the system should return relevant suggestions with low latency....
Design cart management lifecycle service
Scenario You are designing the backend for an on-demand delivery app (restaurants and grocery). Users can create a cart, modify items from multiple de...
Design a pub-sub replay system
Assume you have a distributed publish-subscribe messaging system with topics, publishers that write messages, and subscribers that consume them. Desig...
Design a Daily Puzzle Platform
Design a backend system for a daily puzzle platform. Users should be able to: - Sign in and view the puzzle of the day. - Submit an answer for the cur...
Design a booking system
Design an online booking system (e.g., for hotel rooms, meeting rooms, or appointment slots). Requirements Cover the following in your design: - Core ...
Design a Secure Copilot API
Design a secure API for an enterprise AI copilot product. Assume the product serves multiple organizations, and authenticated users can send prompts, ...
Design a Scalable Likes System
Design a scalable likes service for a large consumer application. Users can like and unlike an item. The system must support these functional requirem...
Design Camera Health Monitoring
Design a system for monitoring the health of 10 million cameras. Each camera sends one heartbeat every minute. The system should continuously report h...
Design Scalable Expense Violation Processing
You now need to productionize the same corporate card policy system. Design a system that can process millions of expenses per day and tens of thousan...
Design an Ad Frequency Capping System
Design a frequency capping system for an advertising platform. A frequency cap limits how many times a user can be shown an ad, campaign, line item, o...