Thesis Defence and Viva Preparation

What questions will examiners ask in a viva?

Mostly questions the thesis itself generates. Nine families recur: why this topic, why this method and not the alternative, what is your contribution, what would you do differently, what are the limitations, how do you respond to an author who disagrees, what does this finding mean, where does this sit in the wider literature, and what would you do next. Beyond those, the questions come from the weak points, which examiners find by reading. Predict them by reading your own thesis looking for where you would attack it.

How do I prepare for a thesis defence?

Build a weakness inventory of fifteen to thirty items with page references, convert each into the question an examiner would ask, and prepare a card with a direct answer, the evidence, the concession and the follow-up you expect. Sort every item into defend, concede or depends. Build one-minute, five-minute and fifteen-minute summaries. Rehearse aloud, and run at least one adversarial mock with someone from outside your subfield.

Should I admit weaknesses in my viva?

Yes, for genuine limitations, and doing it well is a demonstrated strength rather than a loss. Acknowledge directly, state the specific consequence for your findings, say what you would do differently, and stop. Defending a real limitation converts one flaw into a doubt about your judgement, and examiners press harder when they sense a refusal. The opposite error matters too: do not concede a sound choice just because the question sounded critical.

What if I cannot answer a question in my viva?

Pause, which looks like thought rather than panic. Clarify if you did not follow the question. Then answer what you can and name the boundary: "I have not considered that specific comparison. What I can say is..., and I would need to look at... before answering properly." That is a complete answer. Bluffing is the only unrecoverable move, because experienced examiners identify it immediately and then probe.

How do I state my contribution?

In one sentence, with its bounds attached, and never as a description of what you did. A contribution is what is now known that was not: the evidence you provided, in the population and setting your sample supports. If your answer takes two minutes, it is not ready, and it is the most likely opening question.

How should I run a mock viva?

Adversarially. Include at least one examiner who has not read the thesis before that week and at least one from outside your subfield, who will ask the naive questions that expose assumptions. Give them your weakness inventory so they attack the real points. Run it at full length in the real format, record it, and debrief on the questions you had not predicted and the answers that ran long. One well-designed mock is worth five gentle ones.

How do I manage viva nerves?

Practically. Preparation reduces anxiety more than reassurance does, and the weakness inventory helps most, because most examination fear is fear of the unpredicted question and the inventory turns that into a finite list. Know that corrections are the normal outcome in most systems. Rehearse aloud rather than mentally. Sleep the two nights before, arrive early, and do not revise in the final hour. Have a recovery move for the moment it wobbles, and something arranged for afterwards. If anxiety is severe enough to affect your functioning, your institution's student support service is the right route.