Depends on the text/exam you are sitting, or even if it´s a job interview etc.
The test may come in several formats, in pairs, a group interview (sometimes some sort of brainstorming about some matter or other), and the list could go on and on.
Here something you can dig through:http://www.cambridgeenglish.org/exams/a ... king-test/http://autoenglish.org/oralexams/Part1.htmhttp://learnenglishteens.britishcouncil ... king-examshttp://www.studygs.net/oralexams.htmhttp://www.ukstudentlife.com/English/Exams/Oral.htmhttp://englishteststore.net/index.php?o ... Itemid=424http://waze.net/oea/activities/25http://www.splendid-speaking.com/exams/ ... aking.htmlhttp://www.job-interview-wisdom.com/gro ... rview.html
My experience on this one is a bit limited, I used to take an English conversation course long ago, there where a speaking test from time to time, it was taken in pairs, and each pair would choose a topic to talk about.
We would pick some sort of ballot (from a box) and open to see what it was about, with luck we wouldn´t be the first...so we would have some ten minutes or so to practice.
In such events one has to try to act confident (talking in a matter of factly way, so speaking slow (but not exaggerating in the slowness) helps a lot.
As the course was a conversational one, we had a fair share of it in our classes, so in a way we were ready.