Ruddy told Sky Sports: "I think it took everyone a bit by surprise. But I am sure it is not a decision the board at Norwich took lightly.
"They deliberated over it for a long period of time and ultimately thought it was the best thing to do for the team and for the club so you cannot really question them on that.
"We have got the new manager in now and he has come in and had a positive impact so it is looking positive for the next four games."
Norwich host Liverpool on Sunday.