Partners His /her :
Birthday
religion
work or
business details: what, how, where
birthplace
parents names
Children’s names
mothers maiden name
But be aware.
When they ask that type of question they have no idea what the answers should be, so you could say anything. That is, say anything, other than, you do not know. If in doubt, make something up.
PS I just read this reply to my wife. I had not been aware of the extent of the questions she was asked In 2006. They included, what was my mother's telephone number in UK, my children’s birthdays, where they lived and a lot of similar questions. Having been ‘advised’ by an Australian guy outside to be ‘inventive’ , to some she said she did not know, for others she made something up. She 'passed.'
It really is a farce and an abuse the way, at least some, of the interviews are performed.
I understand the reason for the interviews is to ensure that the citizen is not being lured away to another country for some illegally reason, prostitution, slavery etc, and that they will know their rights in the foreign land in case they are mistreated, abused etc.
That is an excellent intention but people (may be jealous who may have been unable to leave Phil) being allowed to subject applicants to inquisitional interrogation, is a civil rights abuse and should be brought to attention at the highest level. I suspect well-educated applicants are not put to such questioning, as it is likely they would complain. Thus, it is the un-worldly wise, who suffer the indignity.
Had I known the extent of the questions put to my wife I would have sent a written complaint to the Chief of the Immigration Service. I still may !