Answer the following pattern software design question:

1. Compare REST and RPC issues you will encounter when using a messaging solution, and give your explanation about it

2. Explain a term of "Focusing on behavior not data"? give some examples and coding implementation about it

3. In developing the software while following the principles of Domain-Driven Design, it does not require a specific application architecture, but the architecture must support the isolation from domain logic, how do you think, so that an application architecture can support isolation from domain logic?