MVC vs MVVM in iOS | Dataford Interview Questions

Your question is MVC vs MVVM in iOS. Take a moment with it on the right.

Talk me through your thinking if you like. When you're confident, submit your answer and I'll grade it like a real screen (7/10 or better passes).

Problem

Context

Architecture choices directly affect testability, maintainability, and UI complexity in an iOS codebase such as the American Express Global Business Travel mobile app.

Question

Explain MVC and MVVM in the context of iOS development. Your answer should cover:

The role and responsibility of each layer in both patterns
How data flows between UI, business logic, and models
The trade-offs in testability, scalability, and developer ergonomics
When you would choose MVC versus MVVM for a feature in the American Express Global Business Travel app

Scope Guidance

Keep the discussion focused on practical iOS engineering. The interviewer expects you to compare the two patterns clearly, mention common pitfalls such as “Massive View Controller,” and explain how your choice changes for simple screens versus state-heavy, data-driven screens.

Your question is MVC vs MVVM in iOS. Take a moment with it on the right.

Talk me through your thinking if you like. When you're confident, submit your answer and I'll grade it like a real screen (7/10 or better passes).

Context

Architecture choices directly affect testability, maintainability, and UI complexity in an iOS codebase such as the American Express Global Business Travel mobile app.

Question

Explain MVC and MVVM in the context of iOS development. Your answer should cover:

The role and responsibility of each layer in both patterns
How data flows between UI, business logic, and models
The trade-offs in testability, scalability, and developer ergonomics
When you would choose MVC versus MVVM for a feature in the American Express Global Business Travel app