About Question com.enthuware.ets.scjp.v6.2.548 :

[ETS User]

The finalize() method can be invoked at most once by the JVM. However, as a method, it can be called as many times as you want.

[admin]

You are right. The option says, "The finalize() method will be invoked at most once on an object". It implies invoked "not by you or the program code".

HTH,
Paul