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 weekly comment digest
Design a service that sends a weekly email digest of the top comments on each post to the post owner. Requirements: - Posts receive comments throughou...
Design VPC, IP plan, management, storage, SSO
Design VPC, IP plan, management, storage, SSO System Design: Multi‑Layer VPC, IP Planning for 2,000 Servers, Fleet Management, Shared Storage, and SSO...
Design notification and project architecture
Design notification and project architecture System Design: Multi-Channel Notification Platform Design a scalable Notification System that supports re...
Design a real-time ad impression aggregator
Design an ads impression aggregator service with the following requirements: - The system ingests a high-volume stream of impression events (each even...
Design real-time live comments
Design a real-time comment system for live video (e.g., Facebook Live comments). Requirements: - Viewers post comments; all viewers see new comments q...
Design a post privacy/visibility system
Design a privacy system for social media posts (similar to Facebook post privacy). Requirements: - Each post can be: Public, Friends, Friends-of-frien...
Design searchable status & geolocation services
Design searchable status & geolocation services System Design: Searchable Short-Form Status Updates with Nearby Search Context Design a microblogging ...
Design an appointment scheduling system
Design an appointment scheduling system for a clinic or similar business. The system should support viewing availability, creating appointments, accep...
Optimize machines for distributed merging cost
Optimize machines for distributed merging cost Optimize k to Minimize Distributed Runtime Context You are splitting a dataset of size n across k ident...
Design a meeting scheduler with cancellations
Design a meeting scheduler with cancellations System Design: Meeting Scheduling Platform (Onsite) Context Design a multi-tenant meeting scheduling sys...
Design and evolve a reservation system
Design and evolve a reservation system System Design: Online Reservation System You are designing a backend platform to book time-based slots for serv...
Design Internal Chat and Re-engagement Emails
Design an internal chat system for an event marketplace company. Requirements: - Employees can send and receive one-to-one messages in real time. - Cl...
Design an online chess game with undo and leaderboard
Scenario Design a real-time online chess game service. Core requirements - Users can challenge friends and start a game session. - Two players take tu...
Design local sports team recommendation system
Design a recommendation system that suggests local sports teams to users. High-level requirements: - Recommend sports teams that are relevant to a use...
Design distributed transactions protocol
System Design: Distributed Transactions Across Multiple Services Context You must design a distributed transactions protocol to coordinate updates acr...
Handle invalid input at system level
Design: Validation and Error Handling for a Top-K Frequency API Context You are designing a REST endpoint that computes the top-K most frequent values...
Design school-to-guardian messaging with acknowledgments
System Design: Guardian Acknowledgement Messaging Platform Context Design a system that enables school staff to send messages to students' guardians, ...
Design distributed log storage service
Design a Distributed Append-Only Log Storage System You are asked to design the storage layer of a distributed, partitioned, replicated append-only lo...
Explain SRE architecture and troubleshooting scenarios
Kubernetes, Reliability, and Data Store Concepts (Technical Screen) Context: Assume you operate a high-scale, latency-sensitive microservices platform...
Make algorithm code production-ready
Productionizing a Sliding-Window String Algorithm Context: You have implemented a correct sliding-window algorithm for a classic string task (e.g., lo...