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"
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"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 URL Shortener
This question evaluates system design and distributed systems competencies, including scalability, availability, data modeling, API design, caching, s...
Design and explain infra, K8s, routing, and fleet
System Design and Operations Deep-Dive Context: You are interviewing for a Software Engineer role with a focus on system design and engineering. Provi...
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. -...
Diagnose distributed database inconsistency
Distributed Database Incident: Inconsistent Replicas You are on-call for a distributed database that serves production traffic. Dashboards show data i...
Design quota enforcement for high concurrency
System Design: Quota Enforcement Service at Very High QPS Context You are designing a multi-tenant quota and rate-limiting service used by many backen...
Design streaming difference at scale
Design a Near Real-Time Anti-Join: Stream vs. Large Reference List You are given: - list1: an unbounded, high-throughput event stream of keys (e.g., u...
Design consistent hashing for sharding
Design a Consistent-Hashing Router with Replication You are building a stateless router that maps arbitrary keys (for example, request IDs or cache ke...
Design secure multi-tier cloud infrastructure
System Design: Multi-tier VPC Architecture for a Large-Scale Application You are designing and deploying a production-ready, multi-tier network on AWS...
Design cache for DAG-based query views
System Design: Caching Strategy for a DAG of Materialized Views Context You are designing an analytics system that computes materialized query views. ...
Design a real-time messenger
Question Design a real-time messaging system (a Messenger/WhatsApp-style product) that supports 1:1 and group chats. Walk through requirements, the AP...
Design a ticket or hotel reservation system
Design a reservation system (Ticketmaster-style event seats or hotel rooms). Requirements: - Users search availability by date/event. - Users select s...
Design analytical tracking database
Design analytical tracking database Design an Analytical Database for User Actions Context You are building an analytics data store to track user beha...
Design Animal Chess game classes
Design Animal Chess game classes Design a Simple Animal Chess (Jungle/Dou Shou Qi) Engine Context You are to design and implement a minimal-but-correc...
Design a High-Frequency Job Scheduler
This question evaluates competency in distributed systems design, scheduling semantics (including high-frequency and recurring jobs), durable job stor...
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 a Conversational Flight Search, Booking, and Price-Tracking Service
Design a Conversational Flight Search, Booking, and Price-Tracking Service Design a service for roughly 30 million daily active users. A user can chat...
Design Queue And Taxi Matching Services
Answer both independent system design prompts. For each one, clarify requirements, propose APIs, describe core data models, explain the architecture, ...
Design a prioritized log manager with eviction
Design a prioritized log manager with eviction Design a Log Store with Priority- and Recency-Aware Eviction Context You are designing an in-memory (or...
Design ad clickstream analytics pipeline
Design ad clickstream analytics pipeline Design an end-to-end advertising clickstream ingestion and analytics platform that ingests events through Kaf...
Design a large-scale distributed rate limiter
This question evaluates system design competency in distributed systems, focusing on scalability, multi-tenant isolation, rate-limiting algorithms, co...