The joke is that the answer could either mean the literal answers to the question, or that the person answering literally doesn’t know the answers and doesn’t care about any of it.

It’s a double entendre.

By missing this aspect and simply answering the question literally, the joke ceases to be.

Probably still liable to the CLOUD Act.

https://en.wikipedia.org/wiki/CLOUD_Act

If, like me, you like to verify the information, here’s the official press release.

https://www.gov.uk/government/news/national-emergency-alert-test-to-be-held-on-7th-september

Founding member of company that stands to make fortunes through a product endorses said product.