Answer:
Explanation:
A relational database is designed to enforce the uniqueness of primary keys by allowing only one row with a given primary key value in a table. A foreign key is a column or a set of columns in a table whose values correspond to the values of the primary key in another table.
Answer:
C. Pipes
Explanation:
Pipes are medium of communication between two or more interrelated processes. It is used for communication between operating system components. It is also used in exchanging messages between components of large programs. It implements interprocess communications through an interface. It passes information from one program process to another.
Software, unless you planned on permanently downloading the Music Album or Song to your computer's Hard Drive. i.e, you would use whatever Music or Media player you have installed on your computer, and that simply counts as Software.
