Undergraduate thesis does not check the similarity, and the undergraduate thesis is mainly in format. First of all, this level must be passed; Secondly, the content, at least, should be well-founded. Don't write for a long time and others can't understand it. That's not good. Finally, ppt is concise and clear. As for the question, it depends on the teacher. It doesn't matter if you can't answer it. Be polite! Have a nice trip!