Software Engineer System Design Interview Questions
Practice 1,082 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 Metrics Monitoring Dashboard
Design a metrics monitoring platform and dashboard for application and infrastructure time series. Services emit metric name, timestamp, numeric value...
Design Trending Collaborative Files
Design Trending Collaborative Files Design a service that ranks currently trending collaborative files. Use the following scale and product rules as p...
Design a Played-By Summary System
This system design question evaluates a candidate's ability to decompose a personalized social-proof feature into distinct distributed systems problem...
Consolidate Three Partner APIs into a Query Service
Consolidate Three Partner APIs into a Query Service Design a service that retrieves data from three partner APIs, consolidates their different represe...
Design an Inventory Management System
Design an Inventory Management System Design a system that tracks products and stock across one or more locations, supports receipts, reservations, re...
Scaling a Collision-Free Rover Fleet to a Million Robots
This system design question evaluates a candidate's ability to scale a stateful, invariant-preserving service across distributed machines, using a sha...
Design a CI/CD Task Scheduler
Design a CI/CD Task Scheduler Design the scheduling core of a continuous-integration and continuous-delivery system. A pipeline is a directed acyclic ...
Validate order book data across multiple databases
Assume your organization stores order book–related data in multiple databases (e.g., one for raw exchange messages, one for normalized orders, one for...
Design a Scalable News Feed
Design a Scalable News Feed Scenario Design the home-feed system for a social product. Users publish posts, follow other accounts, and request a pagin...
Design a Distributed Rate Limiter
This question evaluates competency in distributed systems architecture, API and data model design, performance engineering, and operational concerns s...
Design a Configurable Reward Points Service
Design a Configurable Reward Points Service Design a reward-points service that reads transactions, calculates and stores rewards, and supports busine...
Design a Human Workflow Distribution System
Design a workflow system that distributes tasks to human workers and tracks progress until completion. The system should assign work, prevent duplicat...
Design a resilient bootstrap API
Design a Resilient Bootstrap API When a client app loads, it needs to fetch everything required to render the first screen in a single call. That data...
Design Multi-Dimensional Request Rate Limiting
This question evaluates proficiency in designing distributed rate limiting systems, including API and data model design, consistency and scalability t...
Design a Low-Latency Hotel Room Availability System
Design a hotel room availability service for a travel marketplace similar to Expedia. The key requirement is low-latency availability reads. Users sho...
Design a Calendar System
This question evaluates a candidate's ability to design a large-scale calendar backend, covering data modeling for events, recurrence, invitations, an...
Design a Product Inventory and Pricing Service
Design a Product Inventory and Pricing Service Design a read-heavy service for an e-commerce platform. It must return product details, allow authorize...
Design A Drive-Style Usage Quota Limiter
Practice a cloud storage system design question about enforcing drive-style usage quotas during uploads, deletes, retries, and concurrent operations. ...
Design a Synchronized Watch Party System (LLD)
Design a Watch Party system that lets a host create a virtual room and have multiple users join — via a unique Room ID — to watch the same video conte...
Design a Security Monitoring Framework
This question evaluates a candidate's understanding of designing security monitoring frameworks for cloud infrastructure, covering competencies in sys...