What are domains and data element?
Domains:Domain is the central object for describing the technical characteristics of an attribute of an business objects. It describes the value range of the field. Data Element: It is used to describe the semantic definition of the table fields like description the field. Data element describes how a field can be displayed to end-user.

What is foreign key relationship?
A relationship which can be defined between tables and must be explicitly defined at field level. Foreign keys are used to ensure the consistency of data. Data entered should be checked against existing data to ensure that there are now contradiction. While defining foreign key relationship cardinality has to be specified. Cardinality mentions how many dependent records or how referenced records are possible.

What is an ABAP data dictionary?
ABAP 4 data dictionary describes the logical structures of the objects used in application development and shows how they are mapped to the underlying relational database in tables/views.

What is the difference between a contract and a scheduling agreement?

A scheduling agreement can be made for Consignment, Subcontracting and stock transfer. A contract, also known as a blanket PO, can be made for standard items and can be restricted to a Value or QTY.

How is scrap accounted in subcontracting?

The scrap or the process loss can be adjusted while doing a quality inspection of the material received after subcontracting.

subcontracting cycle.

When the material is sent for subcontracting i.e. some value addition, it is converted into a different material. It needs a BOM to define the components of the finished item being received.

What are the steps involved in consignment cycle?

Consignment cycle is similar to a standard purchase cycle. The difference it that no accounting document is created at the time of goods receipts only QTY is updated.
It is settled once the same is utilized.

What is meant by consignment stock?

Consignment stock is the material which is lying in the premises but is not owned by the company. It has no value assigned to it until it is taken into own stock. Once it is used in production or to be sold, it is taken into own stock.