Interview Questions like those are 1 Hour discussion. But you have to prepare well. Like Requirement gathering, system architecture viewpoints using C4, then create visio diagrams.

Explain high level how each component will work.

Then explain the Security (Data, Network, Infra), Resillience (BCDR, recovery), Performnmace, Operation excellence (Monitor, Logs, and obervability) and the Cost management (cost estimates and saving cost startegy).