I'm a little confused by the wording here. Does "must be specified" mean it has to have some actual code in it, or can it just be an empty method? I'll have to re-read the question carefully to make sure I understand it.
This one seems straightforward. If an event is mandatory, we need to have some way to handle it, so a Block event must be specified. The question even says it may be empty, so the answer is True.
Okay, let me break this down. The question says a Block event must be specified, but it also says it may be empty. So I think the answer is True, even if the Block event implementation is just an empty method.
Hmm, I'm a bit unsure about this. I know we need to handle mandatory events, but I'm not sure if a Block event is always required. I'll have to think this through carefully.
I'm pretty confident about this one. The question is asking whether a Block event must be specified when an event is mandatory, and the answer is True.
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