What Is a Viva: The Oral Exam Behind Your Thesis, Explained
What a viva is, what viva voce means, who sits in the room, what examiners are checking, how UK and Indian PhD vivas differ, and a fact sheet to fill in before yours.
What is a viva? It is an oral exam in which you explain and defend your thesis or project to examiners, face to face or online. The word is short for viva voce, which Merriam-Webster traces to Medieval Latin meaning “with the living voice”. In a doctoral viva, the examiners use it to decide what to recommend about your degree.
Vivas are used at several levels, from undergraduate projects to the PhD, and the rules differ by country and university. This guide explains who is in the room, what examiners are checking, how a UK viva differs from an Indian one, and what to find out before yours.
What is a viva exam and what is it for
A viva exam lets examiners check, in conversation, things a written thesis cannot prove on its own. These include whether the work is yours and whether you understand it.
The University of Sheffield lists four purposes for its doctoral oral examination. In plain words, they are:
- to confirm “the thesis and the research it reports are the candidate’s own work”;
- to let you defend the thesis verbally and “clarify any issues that the examiners have identified”;
- to test your understanding of the wider field, not only your own project;
- to check your knowledge is “of the standard expected for the award of the degree”.
The University of York puts it in similar terms. It adds that the viva “also allows you to respond to any shortcomings identified by the examiners”. So a viva is a chance to explain, not only a test.
Viva voce meaning, and the other words you will hear
Viva voce means orally, as opposed to in writing. Merriam-Webster defines the adverb as “by word of mouth” and the noun as “an examination conducted viva voce”, noting it is “called also viva”. Vitae translates it as “by live voice”.
Universities also use other names for the same event. Sheffield and York call it the “oral examination”, and India’s UGC regulations write “viva-voce”. In the US and Canada the closest equivalent is the dissertation defense, which our guide to what happens at a dissertation defense walks through.
Regulations also use a handful of job titles and outcome names. Here is a short glossary:
| Term | What it means |
|---|---|
| Internal examiner | An examiner employed by your own university; Exeter’s handbook requires at least one |
| External examiner | An examiner from another institution; Vitae says at least one UK examiner is from elsewhere |
| Independent chair | Someone who runs the viva without examining you; at Exeter this chair “must not participate in the questioning”, and Vitae says one is appointed “occasionally” |
| Minor corrections, major corrections, referral back | Outcomes Oxford’s examiners may recommend after a DPhil viva |
| Viva-voce board | The UGC’s term in India for the panel that conducts the viva |
Who is in the room at a UK viva
A UK doctoral viva is a private conversation between you and at least two examiners. Vitae says it is held “in a non-public space”, with at least one examiner “from another institution”.
Your supervisor’s role differs by university. Cambridge says “your supervisor cannot attend the viva”. Sheffield lets your primary supervisor attend only in exceptional circumstances, at your request and with the examiners’ agreement, and they “must not participate in discussions, questioning or assessment”.
Some universities add formal touches of their own. Oxford says candidates “must attend the viva in academic dress”, unless the viva is held remotely. Cambridge, York and Oxford all allow remote or online vivas on their stated conditions.
What is a viva like at an Indian university
In India, the UGC’s 2022 PhD regulations set the national rules, and they let each institution frame its own rules to put them into practice. The viva looks quite different from the UK version.
Under Regulation 11(5), the thesis is evaluated by the research supervisor and at least two external examiners from outside the institution. The viva-voce board “shall consist of the Research Supervisor and at least one of the two external examiners”. So in India your supervisor sits on the panel, which Cambridge, for example, does not allow.
The UGC also says the viva is open to members of the Research Advisory Committee, faculty members, research scholars and students. It may be conducted online. Under Regulation 11(6), the viva goes ahead only if both external examiners recommend the thesis for acceptance.
| UK doctoral viva (Vitae, Cambridge) | Indian PhD viva (UGC 2022) | |
|---|---|---|
| Who examines | At least two examiners, at least one external | Supervisor plus at least one of two external examiners |
| Supervisor | Does not take part; may observe at some universities | Sits on the viva-voce board |
| Audience | Private room | Open to RAC members, faculty, research scholars and students |
| When it happens | After submission; York says within three months | After both external examiners recommend acceptance |
What is viva in university courses below the PhD
A viva is not only for doctorates. Any course can use an oral exam to check that a student understands work they submitted.
Two named examples show the range. In Warwick’s CS310 Computer Science Project module, an undergraduate module, the viva is “a short presentation and extended question and answer session” lasting 45 minutes. Exeter’s examination handbook sets rules for MRes and MPhil vivas as well as doctoral ones.
If you face a Master’s viva, our list of 45 common viva questions explains why examiners ask each one. For timings at different universities, see how long a viva lasts.
What happens in a viva, in brief
Most of a viva is questions and answers about your thesis. Exeter’s handbook says “all vivas are different, but they normally follow a question-and-answer format”.
The University of Edinburgh’s viva preparation guide groups the questions into four kinds: what did you do, why did you do it, what did you find, and what is the significance of your findings. Afterwards the examiners decide what to recommend. The possible results are covered in our guide to viva outcomes explained.
A viva fact sheet to fill in before yours
Rules differ so much that the most useful step is to find out your own. Copy this list, then fill each line from your regulations, your graduate school or your internal examiner.
- Name used: viva, oral examination, viva-voce or defence?
- Examiners: how many, and who is internal or external?
- Independent chair: will one be appointed?
- Supervisor: absent, silent observer, or on the panel?
- Audience: private, or open to others?
- Presentation: required, and how long? Cambridge says you should hear at least two weeks ahead if one is needed.
- Format: in person, online or hybrid?
- Dress code: for example, academic dress at Oxford.
- What to bring: York tells candidates to bring an annotated copy of the thesis.
- Result: told on the day, or only in writing later?
Once every line is filled, you know what kind of viva you are walking into. Take the sheet to your mock viva so the practice matches the real format.
What Thesisroom does with this
Knowing what a viva is will not tell you what your examiners will ask about your own thesis. That part depends on the passages they read and mark.
Defense Practice writes questions an examiner could ask, each tied to a specific passage or page of your own thesis. You can answer in writing or out loud, in three styles: Practice, Rapid round and Mock panel, and Thesisroom does not write answers or scripts for you.
Frequently asked questions
What does viva voce mean?
Viva voce comes from Medieval Latin meaning “with the living voice”, according to Merriam-Webster. As an adverb it means by word of mouth. As a noun it means an examination conducted orally, also called a viva.
Is a viva the same as a thesis defense?
They play the same role: an oral exam on a written thesis. The format can differ. A UK viva is private, while some US schools, such as Michigan’s Rackham, hold public defenses. In Canada it is spelled “defence”.
Who attends a PhD viva in the UK?
You and at least two examiners, at least one from another institution, according to Vitae. An independent chair is occasionally appointed. Whether your supervisor may attend depends on the university: Cambridge says no, while Sheffield allows a silent observer in exceptional circumstances.
Is a viva open to the public in India?
Under the UGC’s 2022 PhD regulations, the viva is open to Research Advisory Committee members, faculty members, research scholars and students. The regulations do not use the word “public”. Check your own university’s ordinance for local rules.
Can a viva be held online?
At the institutions checked here, yes. Cambridge, York and Oxford allow remote vivas under their own conditions, and the UGC regulations say the Indian viva-voce board may conduct the viva online. Ask your graduate school how to request it.
Do undergraduates have vivas?
Some do. Warwick’s CS310 Computer Science Project module includes a 45-minute viva with a short presentation and questions. Whether your course uses one depends on the module, so check your module handbook.
Sources
- Merriam-Webster: viva voce
- Vitae: Your viva
- University of Sheffield: The viva
- University of York: Your viva
- University of Cambridge: Oral examination (viva)
- University of Oxford: Research degree examinations
- UGC (Minimum Standards and Procedure for Award of PhD Degree) Regulations, 2022 (PDF)
- Rackham Graduate School, University of Michigan: Policy Section 4
- University of Warwick: CS310 Computer Science Project
- University of Exeter: PGR Handbook Chapter 12 (PDF)
- University of Edinburgh Doctoral College: A Guide for Viva Preparation (PDF)
How this guide was made: Thesisroom drafted this guide with the help of AI writing tools, then checked every fact, figure and source by hand against the references linked above.