What is the expiration date of the current CCNA (640-802) version? I have had to purchase new CCNA and CCDA books in the past because a new revision number book and test were updated before I had a chance to take a test.
Cisco do not put a expiration date on the exams. This is usually announced about 6 months before they are due to expire. This gives people who are studying the current exam a chance to finish their studies and take the current exam.
However as the 640-802 only came into being last July, I would imagine that it will be here for a little while yet.