Overconfident For Your Viva?
It’s unlikely!
Even the most self-assured individual will probably feel some nerves and disquiet on their viva day. It’s unlikely that anything will go seriously wrong, but fairly probable that you might be asked a question you’ve never considered, face a criticism you don’t like or simply feel awkward at being in there.
So I don’t think you’ll be overconfident for your viva.
The one dangerous area that a PhD candidate can stray into is feeling that they need to have the last word. That they’re the only one who can be right. That they’ve considered everything.
Your viva is a discussion. Your examiners are exploring your thesis, your research and your capability. You might be the best-placed person to respond to their questions but you are not the only smart person in the room.
Listen carefully, take your time in responding and don’t forget to pause and think!