Software Engineer System Design Interview Questions
Practice 893 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 distributed crossword fill solver
Scenario You are building a service that fills a crossword-like grid with words. - The board size is not specified; assume a medium board around 50×50...
Design a KV store with transactions
System Design Prompt Design an in-memory/disk-backed key-value store that supports transactions. Functional requirements - Basic operations: Get(key),...
Design and operate a monolith on Kubernetes
Design and Operate a Monolith on Kubernetes Context You are joining an infrastructure team. The backend is a single monolithic service. The company is...
Design distributed message queue service
Design a Distributed Message Queue for High Throughput and Large Payloads Context You are asked to design a distributed message queue system that supp...
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 ...
Design scalable inventory system and avoid races
System Design: Scalable, Highly Available Inventory Management Context Design an inventory management system for a high-traffic e-commerce platform th...
Design query pagination for large datasets
Scenario You are building an API that returns a paginated list of records from a very large dataset (millions+ rows). Clients can specify: - Filters (...
Design a large-scale ticketing system
Design an online ticketing system similar to Ticketmaster that supports very high concurrency for popular events where many users try to purchase tick...
Design a fitness tracking app
Design a fitness tracking application. Users can record workouts, browse their workout history, and view the route map for activities such as running ...
Design a multi-channel notification system
Design a notification system that receives alert events from other internal systems and notifies all subscribed users through multiple channels (e.g.,...
Design Netflix viewport deduplication
Design an Algorithm to Ensure No Duplicates in the First Netflix Home-Page Viewport Context You are rendering a Netflix-style home page composed of mu...
Design a frontend shopping cart and feature flags
Scenario You are designing frontend-focused systems for a large e-commerce web app. Part A — Shopping cart (frontend focus) Design the shopping cart e...
Design viewport dedup for Netflix home page
Design the Above-the-Fold Deduplicated Home Page Rendering Context You are designing the initial viewport ("above the fold") of a streaming service ho...
Design an online coding contest platform
Design a platform to host timed programming contests (similar to weekly/biweekly coding contests). Core scenario - Users register for a contest, read ...
Design a concurrent web crawler
Question Design and implement a concurrent web crawler. Starting from one or more seed URLs, the crawler should fetch pages, extract links, deduplicat...
Optimize a compute kernel with a simulator
Performance Optimization Plan for a Compute Kernel Context You are given: - A compute kernel (single critical function or set of loops) to optimize. -...
Discuss queues, NoSQL, and concurrency
System Design Concepts: Messaging, Storage Choices, and Concurrency Context: You are designing distributed services that communicate via events and mu...
Design a CI/CD system with live log streaming
System Design Prompt: CI/CD Platform (shell-script jobs) Design a CI/CD system that can: 1. Allow users to define pipelines consisting of multiple job...
Design an ad-click aggregation and enrichment pipeline
Scenario You are designing a data platform to measure advertising performance. Mobile apps and web browsers send ad impression and ad click events. An...
Design a Cryptocurrency Trading System with Third-Party Exchanges
Question Design a cryptocurrency trading platform that routes client orders to one or more third-party exchanges that expose a (nominally) synchronous...