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 Google News-like aggregator
Design a Google News–like News Aggregation Platform Design a multi-region news aggregation platform (in the spirit of Google News) that ingests conten...
Design task scheduler with dependencies
Design a Distributed Task Scheduling Infrastructure Context Design a distributed task scheduling and orchestration system that can run at scale, suppo...
Explain VPCs and private/public network connectivity
What is a VPC (Virtual Private Cloud)? Explain the difference between a private network and a public network/subnet. How do private subnets connect to...
Model data for an ads platform
Design a data model (logical schema) for an advertising platform. Include core entities such as: - Business/account (advertiser) - Campaign and budget...
Design autocomplete and merchant bulk edits
This question evaluates a candidate's system design competency across real-time search/autocomplete and large-scale product update pipelines, covering...
Design a Reliable URL Shortening Service
Design a Reliable URL Shortening Service Design a service that accepts a long URL and returns a short URL, then redirects short-code requests to the s...
Design a backend for an online checkers game
This question evaluates system design and backend engineering competencies, including authoritative game-state modeling, turn-based concurrency contro...
Design a multi-level API rate limiter
This question evaluates understanding of rate limiting, distributed system design, concurrency control, scalability, and operational observability whe...
Design Rolling-Window Ad Frequency Capping
Design a frequency-capping service for an advertising platform. The ad platform receives ad requests for users and must decide whether a candidate ad,...
Design leader election using Redis leases
Design Leader Election Using Redis Leases You have N stateless service instances all running the same code. At any instant, exactly one instance must ...
Design an internal interest-matching platform
Design an internal interest-matching platform System Design Prompt: Internal Employee Interest Matching Platform Context Design an internal-only platf...
Design a Cloud Call-Center Platform for Programmatic Outbound Calls
A SaaS company offers a programmatic calling platform. Business customers (enterprises) integrate through an API: they submit a request to place an ou...
Design rental watchlist and notification system
Design a Rental Listing Watchlist and Availability-Notification System You are designing a feature for a vacation-rental marketplace (Airbnb-style). A...
Implement a two-user communications handler
One-at-a-time Two-User Communications Handler Context Design and implement a communications handler that supports exactly one active conversation at a...
Design a Dependency-Aware CI/CD Pipeline
Design a dependency-aware CI/CD platform that schedules DAG jobs on isolated runners and preserves logs, artifacts, and durable execution state. Addre...
Design a location-based radius top-K search
Design a location-based search service. Input: - latitude, longitude - radius (meters) - K Output: - The top K locations within the radius. The term “...
Design A URL Shortener
This question evaluates skills in large-scale system design, covering distributed systems, API design, data modeling and storage, caching, short-code ...
Design read-heavy org chart subordinate counts
You are given manager→direct-report relationships for an organization (an employee has at most one direct manager; the top-level employee has none). B...
Design a restaurant reservation system
This question evaluates system design competencies including API design, data modeling, distributed systems considerations, consistency and transactio...
Design a global restaurant menu update system
Design a menu update system for a global chain of restaurants. Context: - The chain operates in many countries. - Each restaurant may have multiple ki...