Software Engineer System Design Interview Questions
Practice 944 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 first-time Kubernetes deployment in new cloud
Scenario You need to stand up a new compute cluster on a new cloud account/subscription (greenfield). The team wants a simplified, practical plan for ...
Design a URL shortening service
Design a scalable backend service for shortening URLs (similar to popular URL shortener products). Describe a system that supports at least the follow...
Model data for an ads platform
Problem Design a data model for an online advertising system that supports creating ads and analyzing delivery/performance. Core product needs The sys...
Design low-latency large-scale hotel booking system
You are asked to design the backend for a large-scale hotel booking system that runs behind a very high-traffic consumer app (think a TikTok-like app ...
Design scalable worker pool for template jobs
You have implemented a function that takes a template string (or many template strings) and replaces placeholders like {{db_host}} and {{db_port}} usi...
Design a multi-size storage locker system
Design a storage-locker system that supports storing and retrieving items when lockers come in multiple sizes. Scenario A company operates self-servic...
Design a search autocomplete system
System Design: Google-Scale Search Autocomplete Goal Design a planet-scale autocomplete service for a search box that suggests completions as users ty...
Design a package installer with dependencies
Design a package installer system (like a simplified OS/package manager) that installs packages while respecting dependency resolution. Requirements -...
Design resource loader and ROS-like pub/sub
System Design: Resource Loader and ROS-like Publish/Subscribe Context You are designing two foundational systems for a large-scale, real-time interact...
Design an Instagram-like Media Feed
Design an Instagram-like photo and video sharing service. Core requirements: - Users can create accounts, follow and unfollow other users, and view pr...
Design bookstore and chat messaging systems
You are given two independent system-design problems. --- Question A — Design an Online Bookstore Backend Design the backend for a large-scale online ...
Identify and fix deadlock in locked code
Multithreaded Deadlock: Diagnose and Fix Context You have concurrent code that acquires multiple locks and occasionally deadlocks. The underlying issu...
Design log-query stream processor
Stream Processor: Query Registration and Log Tagging Context You are designing a streaming component that ingests a single mixed stream of messages. E...
Design file-processing API with long-running jobs
You are asked to design an HTTP-based API and high-level backend architecture for processing files in a cloud storage service (similar to a simplified...
Design Slack-like messaging platform
Design a Slack-like team collaboration product. Core features: - Workspaces (tenants), users, and channels (public/private) - Direct messages (1:1 and...
Design Telehealth Consultation Queue
Design a web-based queuing application for a health-insurance company that offers free 24/7 telehealth access to its members through a website and mob...
Design in-memory trade subscription processor
You are asked to design and implement the internal logic of an in-memory trade subscription processor in C++. A simplified interface is provided: `cpp...
Design a ride-sharing system (Uber)
Design a large-scale ride-sharing platform similar to Uber. Cover: - Rider and driver apps (account, availability, requesting rides). - Real-time driv...
Design autocomplete and merchant bulk edits
System Design Prompts 1) Design search engine input suggestions (autocomplete) Design a system that provides real-time query suggestions as a user typ...
Design a Slack-like messaging system
Design a Slack-like messaging system that supports real-time messaging in channels and direct messages. Core features - Users can send/receive message...