If you are giving evidence (either during the examination or the cross-examination) in a court in Ireland, and you do not wish to answer a particular question, you must indicate to the judge that you are not prepared to answer the question and why.
There are very few circumstances where a judge will allow you to refuse to answer a question if it is relevant to the case. The right to refuse is known as a privilege:
When you have voiced your objection to answering a particular question, the judge will then decide whether you or not you must answer the question. If the judge decides that you cannot rely on a "privilege", then you must answer the question. If you fail to do so, you will be in contempt of court and you may be imprisoned.
If you have a question relating to this topic you can contact the Citizens Information Phone Service on 0761 07 4000 (Monday to Friday, 9am to 9pm) or you can visit your local Citizens Information Centre.