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 large-scale news app with caching
Scenario Design a simplified news app (mobile + web) for a very large user base. Users can: - open the app and see a personalized news feed - open an ...
Design a configurable monthly API rate limiter
This question evaluates system-design and distributed-systems skills, focusing on scalable API rate limiting, per-user monthly quota configuration and...
Design content moderation for a posting app
This question evaluates a candidate's ability to design content-moderation features, covering competencies in scalable system design, API and data mod...
Design a hybrid-cloud GPU allocation service
System Design: Hybrid-Cloud GPU Resource Allocation & Job Management Design a service that allocates and manages GPU resources for ML training jobs in...
Design a Slack-like real-time messaging system
This question evaluates a candidate's competency in designing scalable, fault-tolerant real-time messaging systems, including message persistence and ...
Design a news aggregator like Google News
This question evaluates a candidate's competency in designing scalable, low-latency distributed systems for content aggregation, personalization, and ...
Design Real-Time Auctions for Social Posts
Design a real-time auction feature for a large social photo and video app. A creator can attach an auction to a post. Viewers can place bids, and ever...
Design a Top-K trending items service
This question evaluates competency in large-scale system design, real-time streaming ingestion, distributed aggregation, and trade-offs between exact ...
Design a simple API rate limiter
This question evaluates competency in designing scalable, low-latency API rate limiting, covering distributed-systems reasoning, storage and caching t...
Design a simple greeting-card web app
This question evaluates a candidate's ability to design a minimal web application architecture for an MVP greeting-card service, covering frontend/bac...
Design a Data Stream Processor
This question evaluates the ability to design real-time data stream processing systems, testing competencies such as high-throughput ingestion, event ...
Design reliable high-volume chatbot system
This question evaluates a candidate's ability to design scalable, highly available, and fault-tolerant backend architectures for stateful chatbot serv...
Design an online coding contest platform
This question evaluates a candidate's ability to design scalable, reliable, and secure distributed systems for real-time, event-driven workloads, cove...
Design appointment scheduling data model and APIs
This question evaluates backend data modeling, REST API design, and enforcement of domain constraints within a web framework, focusing on scheduling, ...
Design multi-currency pricing end-to-end
System Design: Multi-Currency Price Display and Booking Context You are building a global travel marketplace where guests discover listings, view pric...
Design personalized news aggregation service
The question evaluates the ability to design a large-scale personalized content delivery system, testing competencies in distributed systems architect...
Design an ad frequency capping system
This question evaluates expertise in designing low-latency, high-throughput distributed systems for stateful online decisioning, encompassing competen...
Scale median under memory constraints
Scale median under memory constraints Design a Scalable Streaming Median Service Under Memory Constraints Context You are building a service that cons...
Design camera access-control service
Design camera access-control service Design an Access-Control Service (Users, Cameras, Nested Groups) Context You are building a multi-tenant access-c...
Design an ads data model
This question evaluates a candidate's ability to design scalable data models and system architecture for an ads platform, including entity relationshi...