The database that is a unification of several data files with any redundancy wholly or partially eliminated is

A language that enables users to access or manipulate data is:

A tree is composed of a hierarchy of elements called:

If a transaction Ti has obtained a shared mode lock on item Q, then Ti:

Normal forms are used to:

Projection operator:

The concept of a joined dependency is related to:

Polymorphism is defined as:

The system that processes transactions as soon as they are entered is:

The state while a transaction is executing is:

The role of a DBA is to: