How to practice for a system design interview?

The best way to practice system design is by simulating real-world architectures. MockArch provides an interactive system design simulator where you can construct cloud architectures, simulate real-time traffic, estimate infrastructure costs, and on Pro get LLM deep analysis on your design choices.

How does MockArch AI feedback work?

On Pro, deep LLM analysis evaluates your design for bottlenecks, scaling issues, and security, with a monthly usage cap per subscriber (quota resets at 00:00 UTC on the first day of each calendar month). You receive concrete recommendations for improvements. Free tier includes automated rule-based checks.

Can I cancel my MockArch Pro subscription anytime?

Yes. The Pro tier is billed month-to-month with no long term contracts. You will retain access to Pro features until the end of your billing cycle.

How is MockArch different from Miro or Excalidraw?

Those are general diagram tools. MockArch is built for system design interview prep: you get real-time cost estimates, load simulation, and on Pro, LLM feedback that suggests expert improvements. Interview scenarios and scoring are available on free tier for easy difficulty; medium and hard scenarios require Pro.

What are the core concepts of system design?

Core concepts include scalability (horizontal vs vertical), load balancing, caching strategies, database sharding, CAP theorem, and microservices architecture. MockArch helps you practice and visualize all these components interactively.

How to choose between SQL and NoSQL in a system design interview?

Choose SQL for structured data with complex relationships and ACID compliance requirements. Choose NoSQL for unstructured data, horizontal scalability, and rapid schema iteration. Use MockArch's simulator to compare the performance and cost tradeoffs of both.

How do load balancers work in system architecture?

Load balancers distribute incoming network traffic across multiple servers to ensure no single server bears too much demand, improving responsiveness and availability. In MockArch, you can drag and drop load balancers to see how they impact your system's bottleneck limits.

What is the best way to prepare for FAANG system design interviews?

The most effective preparation combines reading foundational texts (like Designing Data-Intensive Applications), practicing whiteboard problems, and using interactive simulators like MockArch. Pro includes deep LLM analysis to complement your practice; the free tier includes rule-based checks and simulation.

Can I estimate AWS cloud infrastructure costs?

Yes. MockArch acts as a dynamic infrastructure cost calculator. As you add databases, compute instances, and define traffic volumes, the simulator provides a real-time estimation of your monthly cloud spend.

How to practice for a system design interview?

The best way to practice system design is by simulating real-world architectures. MockArch provides an interactive system design simulator where you can construct cloud architectures, simulate real-time traffic, estimate infrastructure costs, and on Pro get LLM deep analysis on your design choices.

How does MockArch AI feedback work?

On Pro, deep LLM analysis evaluates your design for bottlenecks, scaling issues, and security, with a monthly usage cap per subscriber (quota resets at 00:00 UTC on the first day of each calendar month). You receive concrete recommendations for improvements. Free tier includes automated rule-based checks.

Can I cancel my MockArch Pro subscription anytime?

Yes. The Pro tier is billed month-to-month with no long term contracts. You will retain access to Pro features until the end of your billing cycle.

How is MockArch different from Miro or Excalidraw?

Those are general diagram tools. MockArch is built for system design interview prep: you get real-time cost estimates, load simulation, and on Pro, LLM feedback that suggests expert improvements. Interview scenarios and scoring are available on free tier for easy difficulty; medium and hard scenarios require Pro.

What are the core concepts of system design?

Core concepts include scalability (horizontal vs vertical), load balancing, caching strategies, database sharding, CAP theorem, and microservices architecture. MockArch helps you practice and visualize all these components interactively.

How to choose between SQL and NoSQL in a system design interview?

Choose SQL for structured data with complex relationships and ACID compliance requirements. Choose NoSQL for unstructured data, horizontal scalability, and rapid schema iteration. Use MockArch's simulator to compare the performance and cost tradeoffs of both.

How do load balancers work in system architecture?

Load balancers distribute incoming network traffic across multiple servers to ensure no single server bears too much demand, improving responsiveness and availability. In MockArch, you can drag and drop load balancers to see how they impact your system's bottleneck limits.

What is the best way to prepare for FAANG system design interviews?

The most effective preparation combines reading foundational texts (like Designing Data-Intensive Applications), practicing whiteboard problems, and using interactive simulators like MockArch. Pro includes deep LLM analysis to complement your practice; the free tier includes rule-based checks and simulation.

Can I estimate AWS cloud infrastructure costs?

Yes. MockArch acts as a dynamic infrastructure cost calculator. As you add databases, compute instances, and define traffic volumes, the simulator provides a real-time estimation of your monthly cloud spend.

MockArch

AI System Design Simulator

Practice architecture decisions, not just diagrams.

Get real-time cost estimates, AI-powered design reviews, and interview-grade feedback. Built for staff and senior engineers.

check_circleGrowing library of interview scenarios (easy free; full library on Pro)
check_circleLive infrastructure cost & traffic simulation
check_circleLLM design critique on Pro (rule-based checks on Free)

Architecture Scoreinfo

84/ 100

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