Apple System Design Interview Questions
Practice the exact questions companies are asking right now.
"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 Token-Bucket Rate Limiter
Design a distributed rate limiter using token buckets. Each user or API key has a bucket with a fixed capacity. Tokens refill at a configured rate, an...
Design Cloud Photo Storage and Multi-Device Sync
Design a cloud photo-storage service with upload, download, and multi-device synchronization. Store photo bytes separately from searchable metadata. S...
Design a Centralized Logging System
Design a Centralized Logging System Design a system that collects application logs from a large fleet of microservice instances and makes them durable...
Object-Oriented Design: Hotel Room Booking System
Object-Oriented Design: Hotel Room Booking System Design the object model and core service for a hotel room booking system. The service must let a cli...
Design APIs for a Voting System
Design APIs for a Voting System Design the APIs and core data model for a voting system. Begin by clarifying the type of vote: identified or anonymous...
Design a smartwatch sensor subsystem
This question evaluates system-level engineering skills for designing a smartwatch sensing subsystem, including sensor selection, trade-offs among acc...
Design CI/CD for AI Services
Design a CI/CD platform for a large AI product organization. The platform must support backend services, model-serving APIs, data and feature pipeline...
Design a multimodal RAG assistant
Prompt Design a Retrieval-Augmented Generation (RAG) system that can answer user questions using an internal knowledge base containing multiple modali...
Design ad click aggregator and file sync service
This question evaluates system design competencies in building scalable, reliable distributed services—covering high-throughput event ingestion and ag...
Implement a robust REST API method
Implement a robust REST API method Design and implement a REST API method to create a resource with idempotency Context You are building a create endp...
Design Apple News without ML
Design an initial search and content-discovery system for a news application similar to Apple News, assuming you do not have a trained ranking model y...
Implement a robust socket message reader
Implement Message Framing Readers for TCP Sockets Context You are given a TCP socket. Each call to recv(k) may return any number of bytes up to k; in ...
Design TikTok Data Engineering Systems
This question evaluates data engineering competencies including scalable streaming ingestion, processing orchestration, data partitioning and failure ...
Design and scale a Yelp-like platform
System Design: Yelp-like Local-Business Reviews Platform + URL Shortener You are designing two systems: 1) A Yelp-like local-business reviews platform...
Design Disk-Based Inventory Serving
Design software for a machine that has no SSD storage and only a small amount of RAM. The machine must service inventory requests using spinning disks...
Scale Digit-Square Convergence Requests
Design a service that receives very high request volume for the digit-square convergence operation. For each request, the input is a positive integer ...
Design an Accurate Click Aggregator
This question evaluates a candidate's ability to design reliable, high-throughput event processing and analytics systems, emphasizing data modeling, i...
Design video platform and catalog system
System Design: Two Independent Systems You are asked to design two large-scale systems. For each system, provide: - Scope and key requirements - Exter...
Migrate a monolithic wallet to microservices
System Design: Migrating a Monolithic Digital Wallet (Apple Cash–like) to Microservices Context You operate a high-scale consumer digital wallet and p...