What is the purpose of the icon marked as A in the image. when def‌ining the ‘Catalog Price Rule Conditions

Active subcategories created under a hidden category does not appear in the navigation menu but are included in the layered navigation.

Which test credit-card numbers belongs to Visa?

Characters used to indicate all states or all zip/post-codes when defining a New Tax Zone and Rate in the Magento backend?

Which is a part of the shopping tools provided in Magento?

You can cancel an invoiced order in Magento.

How does Magento determine the visual representation of each building block of a page view?

If you have a product that comes in different sizes, Where do you add a new size for the configurable product?

When should you edit files in the base template?

What is default value of cookie lifetime

Which are frontend blocks with a predefined set of configuration options?