Questions

Foreign keys are the columns of a table that points to the primary key of another table. They act as a cross-reference between tables.

In detail : A Foreign key is a field (or collection of fields) in one table that uniquely identifies a row of another table or the same table. In simpler words, the foreign key is defined in a second table, but it refers to the primary key or a unique key in the first table.

Cottage industry is a manufacturing activity of people operated at home. The handcrafts which were sold in the society are examples of cottage industy products. It is a small scale industry in which the labor force is mostly family members or individuals.

In communication satellite, multiple repeaters are known as Transponders.

Humans cannot digest cellulose because they are lacking with the enzymes responsible to breakdown the beta acetal linkages.