What do you need to do to implement a completely new Web Service protocol in Magento?

Which one of the following classes does NOT exist in Magento?

A customer bought two items but wants to cancel one. Which option enables the administrator of the site to edit
the quantity while the invoice is being captured in the admin area?

Given an EAV-based data model whose data is stored in the table foo_entity, in which table would you find the
values for an attribute of the varchar type?

Which file path correctly identifies the location of a modules install/upgrade scripts inside the primary module
directory?

How does Magento store comments regarding different entities (invoice, credit memo, shipment)?

Which of the following node names may be used inside the setup resource declaration to utilize a custom setup
class?

In which order are the following methods executed after Mage_Core_Model_Abstract::save ( ) is called?
1 – Mage_Core_Model_Abstract::_beforeSave ( )
2 – Mage_Core_Model_Abstract::_afterSave ( )
3 – Mage_Core_Model_Mysql4_Abstract::_beforeSave ( )
4 – Mage_Core_Model_Mysql4_Abstract::_afterSave ( )
5 – Mage Core Model Abstract::afterCommitCallback ( )

A native Magento EAV entity will use_____________.

Which model is responsible for calculating the taxes for the selected shipping rate?