How do you set discounts based on the quantity of products purchased from the Magento backend?

Which is the official supported operating system of Magento?

Merchant can add tax rates to Magento only by importing a csv file.

Which property values must be supplied for all types of products without which the products will NOT function?

While configuring the Express Checkout Settings in Magento, suppose you set the 'Billing Agreement Signup' to 'Ask Customer' (marked as A in the image). What does this imply?

Which payment method is NOT available in Magento?

Which is not valid for service layer?

Who uses the presentation layer?

How many code pools does Magento has?

Which products do not have a physical presence, and are typically used for such things as services, warranties and subscriptions?

Which file does Magento uses to detect maintenance mode?