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 REST GET API to fetch DB records
This question evaluates a candidate's competency in RESTful API design, HTTP semantics, database querying and schema considerations, pagination and fi...
Design a distributed web crawler
This question evaluates the ability to design scalable, fault-tolerant distributed systems for web crawling, covering competencies such as URL dedupli...
Design an image crawler for unlimited URLs
Design a service that crawls images starting from a set of root URLs. Requirements: - Input: one or more root URLs. - Crawl pages, discover links, and...
Model advertiser intake database schema
Model advertiser intake database schema Advertiser Intake and Campaign Data Model (F1-style) Context You are designing a multi-tenant advertiser intak...
Enable secure offline reservation caching
System Design: Offline Caching for Reservations (PWA) Design a web application that supports offline access to reservation information. The app is a p...
Design short URL service with click counting
This question evaluates the ability to design scalable, highly available web services encompassing URL shortening, redirect semantics, API design, cli...
Design an exception monitoring system with top‑K
This question evaluates the ability to design a scalable, low-latency exception monitoring system focusing on streaming ingestion, event grouping/fing...
Design a high-level logging system
Design a high-level centralized logging system for a company. Assume many services (microservices, batch jobs) running across multiple hosts/container...
Schedule instructions on a VLIW pipeline
VLIW Instruction Scheduling and Software Pipelining You are given a 4-issue VLIW machine with these functional units and latencies: - 2 ALUs (ALU late...
Design relational-to-NoSQL migration pipeline
System Design: Migrate From Relational DB to a NoSQL Key-Value Store with Snapshot + CDC Context You need to migrate data from an OLTP relational data...
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 ...
Explain database design and consistency
System Design (Technical Screen): Database Portion of a Project Provide a structured description of the database component of a real project you owned...
Design an extensible ticketing system
System Design: Extensible EventTicketSystem Context Design a ticketing platform that sells tickets for concerts, movies, and sports. The system must s...
Design a configuration subscription service
System Design: Configuration Service with Subscriptions Context Design a multi-tenant configuration service that stores key–value configuration and le...
Design real-time top-K products service
Question Design a real-time service that ingests a continuous stream of purchase events with the schema (customer_id, item_id, timestamp) and continuo...
Design resilient auth with flaky third-party tokens
System Design: Resilient, Secure Request Flow with Unreliable Third‑Party Authorization Context You are designing a multi‑region, HTTP/JSON API where ...
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 multi-core service startup scheduler
Service Startup Scheduler on a Host with M CPU Cores Context You are given a directed acyclic graph (DAG) of services where an edge u → v means servic...
Design scenario-based speaking feature
System Design: Scenario-Based Speaking Practice for a Multilingual Learning App Goal Design a scenario-based speaking practice feature where users sel...
Design signals across power and clock domains
Question In a SoC with two power domains A and B, design the interface for a control signal signal_1 (a registered 1-bit control such as an enable/sta...