FAQ.getCategories()

CopiedZohoSalesIQ.FAQ.getCategories(salesIQArticleCategory);

CopiedZohoLiveChat.FAQ.getCategories(new FAQCategoryListener() 
{
   @Override
   public void onSuccess(ArrayList<SalesIQArticleCategory> categories) 
   {
     //your code
   }
   @Override
   public void onFailure(int code, String message)
  {
     //your code
   }
});