As this is being asked in English, your results are definitely going to be skewed in favor of those who speak and use English online. I am not a native speaker, but to balance this I will give my husband`s answers (sick and at home bored today), translated into English for you.
1. Very poor, some technical reading ability. Yes, I have a degree.
2. No, never.
3. No. But sometimes English words are used in Japanese technical documents, so on those occasions I will search Japanese sites for information using the English word.