/**
  * returns boolean wether the question
  * is answered during test pass or not
  * 
  * (overwrites method in class assQuestion)
  * 
  * @param integer $active_id
  * @param integer $pass
  * 
  * @return boolean $answered
  */
 public function isAnswered($active_id, $pass)
 {
     $numExistingSolutionRecords = assQuestion::getNumExistingSolutionRecords($active_id, $pass, $this->getId());
     return $numExistingSolutionRecords > 0;
 }