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

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

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

A Backend controller extends which class ?

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

Which does NOT return an instance of a helper object

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

Which tools/customizations are available in Magento?

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

in which methods would you log event names?

Which are correct regarding the use of PayPal gateways solution in Magento 1.9?