At minimum, which two instances make up an ABAP system, and what does each run?

During a system copy, SWPM requires the central kernel directory to be empty, but it contains hdbclient — how do you handle that?

Which task list automates postinstallation activities, and what must you watch out for when running it?

When installing the SAP Web Dispatcher and gateway, how do you choose between embedding in the ASCS and a standalone instance?

After installing the ABAP Developer Edition, how do you obtain and install its license?

After launching sapinst, how do you know it is ready and you can connect to the GUI?

If you didn't suspend batch on the source, how do you stop the target system from running background jobs during a system copy?