Which of the following statements is/are correct regarding the use of PayPal gateways solution in Magento 1.9?

in which methods would you log event names?

Maximum number of orders that a merchant can display on the 'Orders' page while managing orders in the Magento backend?

Which tools/customizations are available in Magento?

Which validation checks for the data entered in a field are available?

Which field is used to identify countries from which you accept the orders?

A ..... can hold products with full, partial, or no configuration.

A Backend controller extends which class ?

Inside a .phtml file, what does '$this' refer to?

A custom frontend controller will extend which one of the following classes?

You need to change an username permission access. How do you change it?