If you chose for the option to simulate the witcher 2 save you will be asked right after the prologue some questions by an NPC. 

**Care: The Witcher 3 - Wild Hunt spoilers ahead**

This happens right after you killed the griffin and decide to go to Jennifer. You meet her, she takes you with her and you meet a king, then during a shaving scene you get asked some questions about the witcher 2 decisions.

**Care: The Witcher 2 - Assassin of Kings Spoilers ahead**

These questions are about:

 - killed or spared Aryan LaValette  
 - sided with Iorveth or Roche
 - saved Triss or saved Saskia/Anais
 - saved Sile de Tancarville or let    her die
 - killed or spared Letho