Thesis defense questions: 25 common jury questions and how to answer

After the presentation comes the discussion with the jury. It is often the part students fear most, yet it is easy to prepare: the questions almost always revolve around the same themes. Here are the 25 questions asked most often at dissertation, final-year project and thesis defenses, and a simple method to answer them.

In short: the jury checks that you master your topic, your method and your results, and that the work is really yours. Prepare a short answer to each question on this list, listen to the question until the end, rephrase it if needed, answer in 30 seconds to 1 minute and honestly acknowledge the limits of your work.

What is the jury looking for?

The jury is not trying to trap you. It wants to check that:

• you understand your topic and the concepts you used;

• you can justify your methodological choices;

• you can interpret your results and see their limits;

• the work is really yours.

A critical remark is not a failure: it is often a chance to show your perspective.

Questions about the topic and the research problem

1. Why did you choose this topic?

2. What is your research question, in one sentence?

3. What makes your work original compared with existing studies?

4. Why did you limit your study to this population or this city?

5. What were your objectives and did you achieve them?

Tip: question 2 is almost always asked. Prepare a clear sentence and practice saying it without hesitation. See how to write a research problem statement.

Questions about the theoretical framework

1. How do you define this key concept?

2. Who are the reference authors on your topic?

3. Why did you choose this theoretical model rather than another?

4. Are your hypotheses drawn from the literature?

Questions about the methodology

1. Why a quantitative (or qualitative) approach?

2. How did you determine your sample size? See sample size for a thesis.

3. Is your sample representative?

4. How did you build your questionnaire? Was it pre-tested? See designing a thesis questionnaire.

5. How did you check the reliability of your scales? See Cronbach's alpha in SPSS.

6. Why did you use this statistical test?

Questions about the results

1. What is your most important result?

2. What does this value mean (p-value, coefficient, R²)?

3. How do you explain this unexpected result?

4. Do your results confirm those of previous studies?

Tip: for each test, be able to explain in simple words what it measures and what the result means. Juries often ask: "What does that mean in practice?" Review the chi-square test, linear regression or SmartPLS depending on your analysis.

Questions about limitations and perspectives

1. What are the limitations of your work?

2. If you did the study again, what would you change?

3. What concrete recommendations do you make?

4. What research avenues does your work open?

Personal and practical questions

1. What did you learn during this work or internship?

2. What difficulties did you face and how did you overcome them?

How to answer well: a 4-step method

1. Listen until the end and take notes if several questions are asked at once.

2. Rephrase if the question is unclear: "If I understand correctly, you are asking…"

3. Answer directly, in 30 seconds to 1 minute: the answer first, the justification second.

4. Rely on your work: a page of the thesis, a backup slide, a reference.

What if you do not know the answer?

Do not bluff. Say honestly: "I did not look into that aspect, but I think that…" or "That is an interesting avenue I did not explore; it could be the subject of future research." Juries value honesty far more than an invented answer.

How to react to criticism

Thank the jury for the remark, do not justify yourself defensively and show that you understand the limitation: "You are right, the sample size limits the generalization of the results; that is why I mentioned it in the limitations." If the remark concerns a correction, write it down: some juries ask for a corrected version after the defense.

Practice effectively

• Write your answers to the 25 questions on this list, then practice saying them without reading.

• Do a mock defense in front of classmates and ask them to play the jury.

• Reread your whole thesis the day before: the jury can ask about any page.

The full plan: prepare your thesis defense in 7 days.

Frequently asked questions

How long do the jury's questions last?

Usually 20 to 40 minutes for a dissertation or final-year project, sometimes more for a PhD. Each jury member speaks in turn.

Can the jury ask off-topic questions?

It can ask general knowledge questions related to your field. Stay calm, answer what you know and, if possible, bring the answer back to your work.

Should I thank the jury at the end?

Yes, one simple sentence is enough: "Thank you for your comments and questions, which will help me improve this work."

How can I manage stress during the questions?

Breathe before answering, take a few seconds to think (it is accepted) and drink some water. Having prepared the likely questions is the best remedy for stress.

Going further

Also prepare your slides with our guide to the defense PowerPoint presentation. Data Académique helps you prepare your defense, especially the questions about your methodology and analyses: discover our thesis and final-year project support.