Khul jaa.... book book

Recently, one of my profs Mr. Bean (name changed due to survival reasons) announced in the class that in this term the exams won't be open-book as they were in the last term. We will have conventional closed-book exams this time. I didn't know whether to be happy or sad on hearing this. So here's a little analysis -


Advantages of open-book exams:

• If you manage to identify the chapter correctly, your blind shot will at least hit the zone, if not the target.
  
  
• You only have to exchange the page numbers, instead of the whole answers.
  
  
• It’s easier to pretend that you are thinking when you are groping into a book. This comes in handy when the subject prof is invigilating as well.
  
  
• At least, now you can pass time for three hours, which again, can impress the invigilator.
  
  
• You can start preparing for the re-exam then and there.

Disadvantages:

• The questions asked are either unsolved exercises or the author himself would have proclaimed that to be “out of the scope of this book”.
  
  
• You don’t get questions like “define this” where you can write “the blah blah of the blah blah is called new blah new blah” and secure 2 marks.
  
  
• You feel empowered to do nothing. You can’t even make the excuse “I was not prepared, else I would have..“ to yourself.
  
  
• You have to buy the book.

And the result is - I am still confused. How the heavens does the prof manages to do this every single time!!!