Look for the errors, document them, and bring them with you to the test. I won't pretend this isn't going to hurt, and you'll probably kick yourself for not seeing these errors sooner. However, the examiners will be pleased that you accomplished it, and you will have a lower reaction time to any errors they call out.
 

This is what she had to say, and I got an A+.
So, I believe I can reasonably respond to your query. 

Now, then, some advice:-

Part A: Nonverbal Cues
1. Make sure your spine is perfectly straight and your eyes are facing the examiner (you don't want to freak them out, but you do want to seem confident).
2. You should stand up straight with your hands behind your back if you have to.
3. Show your response using hand movements. You come across as assured and sure of yourself.
 

Say "Good Morning" first thing in the morning, and "Thank You" at the end.
 

Part B Method of Replying, 
First, always respond positively to inquiries. Don't stutter or glance around awkwardly.
2. Say "Sorry sir/mam, please ask next question" if you don't know the answer. Don't ramble on; there's a reason these people are called examiners.
Third, avoid unnecessary chatter. Don't ramble; just respond to the specific questions posed.
4 Never talk throughout the test. Don't rush to answer the examiner's question, even if you already know the solution.
 

Part C. Get Ready
First, give your whole project a thorough reading.
2. Stay up-to-date on relevant news stories, statistics, etc.
Third, show some class.
4.Friend or family member number four: Have them quiz you on your assignment. You may use this to get ready and settle your anxieties.
5. Be aware of the connections between your issue and others in the same field. If your economics class requires a project based on supply and demand, explain how your research fits in with the rest of the course. 
 

1. Take a Deep Breath and Relax
You can only make matters worse by stressing yourself out, which will prevent you from sleeping and make you sick. Find anything that helps you unwind, whether it yoga, exercise, meditation, or even playing a video game. Find a way to keep yourself relaxed in the days, weeks, or months running up to your viva.
 

2. Have Some Good Times
There is an eerie pause after you hand in your thesis until the day of your defense. It's simple to get into the trap of thinking that you need to continually review. Not in my opinion! Having fun is still important; else, you risk burning out before the big test. Get out and have some fun (maybe with those buddies you've ignored over the previous few months/years) if you want to start the day feeling rejuvenated.
 

3. Trust Your Own Judgment
If your PhD journey has not been a parade of papers and sunshine, I understand if you struggle to believe in your own ability. However, keep in mind that you have spent the better part of the previous several years researching, developing, and implementing your project. You should always keep in mind that you are the expert in this field.
 

4. Approach the Situation Positively
Don't think of the examiners as sadistic torturers out to get you. They expect you to succeed. But if you walk in with the attitude that they want you to fail, you'll be more defensive and fearful, neither of which is ideal.
Think of them as individuals who care about what you've done and who are familiar with the challenges and dangers of research.
 

5. Wear Viva Success Garb
You should make an honest attempt to appear presentable for your viva, even if your clothing is a bit worse for wear after years of lab labor and you consider smart to be wearing a T-shirt without any stains or holes. First of all, investing in your appearance will boost your confidence. Secondly, it sends the message to the examining committee that you take your PhD and the viva very seriously.
 

6. Peruse the Thesis
You need to make sure that the years of study and writing you have put into this project are not forgotten. This is particularly important if there will be a significant time gap between turning in your thesis and taking the test. You don't have to (and probably shouldn't) read it every day until your viva, but you should review it several times leading up to the test.
 

Observe the Regulations
There are varying numbers of examiners and a convenor at various educational establishments. Preparing a talk to deliver before the viva is a common requirement at some universities (it was at mine, and I thought it to be excellent preparation for the test). Check out if you need help crafting a winning presentation.
You should familiarize yourself with the mission of your organization so that you can act appropriately. Be sure to ask whether you may bring a copy of your thesis into the test with you, and if so, if you'll be permitted to make notes on it.