Loading an attribute on a catalog/product object

Question

I've started working through some practice material for the Magento Certified Developer exam, and one of the questions that I ran into, and that I am still not sure about (I'm struggling to find material about this specific subject) is this:

For an attribute to be loaded on a catalog/product object, which two of the following conditions
must be satisfied? (Choose two)

A. The eav_attribute table must contain a row defining the attribute's properties and its entity type.
B. The attribute must have a backend model configured in the XML config.
C. The attribute must be part of the attribute set pertaining to the object being loaded.
D. There must be a record of the attribute on the catalog_product_super_atti:ibute table.
E. There must be a column added to the catalog_product_entity table.

My answers are A and C, is this right? If not, what is right, and why?

Answer 1

The right answers are indeed A and C.

• B is wrong because an attribute does not necessarily have a backend model configured in the XML configuration.
• D is wrong because the catalog_product_super_attribute table is only related to the configurable products attributes.
• E is wrong because the EAV system does not add extra columns to flat tables, it adds rows to the EAV tables to handle attributes relations.