What does Magento use to determine whether the automatically run upgrade scripts have been run yet?

When you register an event observer, which two of the following pieces of information are required for it to
function?

Which of the following accurately describes the parent class of all EAV-based resource models?

The checkbox “Use default value” is checked and the corresponding input field is disabled, as shown in the
graphic above. How does Magento represent this state in the corresponding EAV value tables?

Which one of the following API protocols does native Magento support?

Which one of the following controller classes could respond to this URL?: http://example.com/modulename/
controller/index

When the Magento configuration is being loaded, all the XML files in app/etc and the module registration files
under app/etc/modules/ are loaded first. After that step, in which order are the following items loaded?
1. Configuration from the core_config_data DB table2. app/etc/local.xml
3. The etc/config.xml of all active modules

You have a product collection and want to add a filter to get all products whose name starts with Test or whose
price is 0.00.
Which of the following statements would add that OR condition?

What is the difference between the base grand total and grand total attributes of the order?

Which of the following items is NOT utilized in Magentos implementation of EAV-based data models?