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 GPT chat UI with snapshots and sharing
System Design: End-to-End Web App for Interacting with a GPT-like Model Context You are designing a multi-tenant, browser-based SaaS application that ...
Explain Kafka partitions and delivery semantics
Kafka partitions, replication, consumer groups, and delivery guarantees Context You are designing and evaluating a Kafka-based data pipeline and need ...
Implement a robust socket message reader
Implement Message Framing Readers for TCP Sockets Context You are given a TCP socket. Each call to recv(k) may return any number of bytes up to k; in ...
Design a keyboard and mouse input system
Question Design an input processing system that captures keyboard and mouse events and can reliably reconstruct what the user typed (answering "what d...
Design an in-memory cloud storage system
In-Memory Cloud Storage Service (Take-home) Design and implement an in-memory cloud storage service that maps files (objects) to their metadata. The s...
Design account opening workflow
System Design: Online Bank Account Opening Workflow Context You are designing a high-scale online bank account opening workflow for web and mobile cli...
Schedule and cancel delayed payments
Question Extend an existing in-memory payment system (immediate transfers between accounts, plus a top-N spenders/payers leaderboard) with scheduled p...
Design a multi-channel notification system
System Design: Multi-Channel Notifications (Email, SMS, Push, In‑App) Context Design a notification platform that reliably delivers messages across mu...
Design a distributed web crawler
System Design: Distributed Web Crawler (1,000 Heterogeneous Workers) Context You are asked to design a production-grade web crawler that begins from a...
Design an asynchronous logger with formatting
Design an Asynchronous C++ Logger Using a Lock-Free Queue Context You are asked to design and implement an asynchronous logger suitable for a technica...
Design a Digital Asset Custody Service
Prepare for a Anchorage Digital system design interview about design a digital asset custody service. This question focuses on requirements, architect...
Design an online auction system
Design a scalable online auction service. Users can: - Create an auction (item info, start/end time, reserve price optional). - Place bids while the a...
Design airplane seatback entertainment with UI focus
Design airplane seatback entertainment with UI focus Design an In‑Seat Personal Entertainment System (IFE) — UI/Interaction-Focused System Design Cont...
Design concurrency-safe shared payment account API
Design concurrency-safe shared payment account API Prevent Double-Spending When Two Users Pay Simultaneously from the Same Account Context You are des...
Design a Top-K trending service
This question evaluates skills in distributed system design, real-time stream processing, scalable aggregation, windowing semantics, and trade-offs ar...
Design an At-Most-Once Job Scheduler
This question evaluates a candidate's competency in distributed systems and system design, focusing on at-most-once execution semantics, fault toleran...
Design a search autocomplete system
Design a Search Autocomplete System Design a planet-scale search autocomplete (type-ahead) service. As a user types into a search box, the service ret...
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 video-on-demand streaming service
This question evaluates a candidate's ability to design a large-scale video-on-demand streaming system, testing competencies in distributed systems ar...
Design a marketplace price tracking service
Design a large-scale product price tracking service similar to an e-commerce price monitor. Users can submit product links from a major online marketp...