Software Engineer System Design Interview Questions
Practice 1,093 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 Scalable Like Counter
This question evaluates a candidate's competence in large-scale system design, covering scalability, high-throughput write handling, read-optimized co...
Design an in-memory key-value database
Design an in-memory key-value database Design an In-Memory Key–Value Database (Technical Screen) Context Build an in-memory key–value (KV) database th...
Design Top K ranking system
Design Top K ranking system System Design: Real-time Top-K from a Large/Streaming Dataset Context You receive a continuous, high-volume stream of even...
Design an in-memory key-value store using maps
Design a low-level key-value store library (like an embedded storage engine) under an interview constraint: you may use only map/dictionary-like data ...
Design a secure trading app on AWS
Scenario Design a secure, Robinhood-like mobile/web application on AWS, with a deep dive into: 1. User profile management (account creation, authentic...
Design scalable job scheduler and query dashboard
Design a scalable, fault-tolerant job scheduling system. The system should allow clients to schedule background jobs (for example, sending emails or r...
Design a prompt-sharing platform
This question evaluates system design competencies including product and backend architecture, data modeling and indexing, permission and sharing mode...
Design scalable insurance claims processing system
Design an end-to-end insurance claims processing system for a health-focused insurer. The system handles a claim's full lifecycle — from submission, t...
Design a fast host listing metrics page
Design the backend for a host (landlord) listings page. User flow: - Host opens a page showing many of their listings. - Host selects a date range. - ...
Design a ride-hailing platform like Uber
You are asked to design a large-scale ride-hailing platform similar to Uber. Requirements Functional requirements - Riders can: - Sign up, log in, a...
Design an ad content delivery system with A/B testing
Design an ad content delivery (ad serving) system that selects and serves ads to users, and supports A/B testing / experimentation. Core scenario A cl...
Design an analytics dashboard for an AI chat app
This question evaluates a candidate's ability to design scalable observability and analytics systems for an AI chat product, including considerations ...
Design a distributed key-value store
This question evaluates understanding of distributed systems concepts such as data partitioning, replication, consistency models, fault tolerance, sca...
Design a video streaming platform like Netflix/YouTube
This question evaluates a candidate's competence in designing large-scale video streaming systems, covering distributed systems architecture, scalabil...
Design homepage viewport rendering with deduplication
This question evaluates system architecture and backend–client design competencies, including viewport-based fetching, cross-module deduplication, pag...
Design a client-side comment system
Scenario You are asked to build a client-side comment system (no backend required). The focus is on data modeling, UI behavior, and persistence. Requi...
Design a crash-resilient file system
Prompt Design a resilient file system that can recover file contents correctly after a system crash (e.g., power loss / kernel panic). The interviewer...
Design an ads audience targeting system
This question evaluates skills in large-scale system design, data modeling for massive audience membership, low-latency lookup mechanisms, and operati...
Design a payment processing system
This question evaluates system-design competency in building reliable payment workflows, covering distributed transaction handling, idempotent APIs, a...
Design a scalable resume search system
Design a scalable resume search system System Design: Resume Search Platform Context A recruiting company needs a platform where applicants can upload...