Wich generation is the ipad 9.3.5.?

It really doesn't matter.

Your iPad could be an iPad 2nd gen or iPad 3rd gen.

Either way both these iPad models cannot be upgraded past iOS 9.3.5.

The hardware is just too old.

That stated, whatever older iPad you have should still be receiving application updates from app developers.

My wife and I have both iPad 2 and 3 models that we still ude everyday and we both still receive regular daily app updates from app developers.

Good Luck to You!

It's not possible to tell for certain; an iPad running 9.3.5 is probably an iPad 2, iPad 3, or first generation iPad mini, but may be an iPad 4, original iPad Air, or newer iPad mini model which hasn't been updated in a while.

(164660)

Your signature states you have a 2nd generation iPad.

That iPad is, at least, 5 years old and possibly 7 years old.

Apple kept making the iPad 2 into 2013.

That iPad cannot be upgraded past iOS 9.3.5.

Its hardware is too old and underpowered to run newer iOS versions.

If you mean by an iPad running iOS 9.3.5 and not upgradable to iOS 10+
Then it is either the iPad 2 or 3 I can clearly see the question saying iPad 2