A view of database that appears to an application program is known as:

• Schema

• Subschema

• virtual table

• none of the above

A set of objects that share a common structure and a common behavior is called:

• Object

• Class

• Entity

• None of these

Tree structures are used to store data in

• Network model

• Relational model

• Hierarchical model

• File based system

What is data integrity

• It is the data contained in database that is not redundant

• It is the data contained in database that is accurate and consistant

• It is the data contained in database that is secured

• It is the data contained in database that is shared

The level of data abstraction which describes how the data is actually stored is

• Conceptual level

• Physical level

• File level

• None of these

Collection of information stored at a particular moment is

• View

• Schema

• Instance

• None of the above

A data model is

• Used to describe the structure of database

• Set of basic operations on the data base

• Both a and b

• None of these

In a hierarchical database, a hash function is used to locate the

• root

• collosion

• primary key

• Duplicate records

The view of the total database content is

• Conceptual view

• Internal view

• External view

• Physical view

DML is provided for

• Description of the logical structure of the data base

• The addition of new structure in the database system

• Manipulation and processing of the database

• Definition of the physical structure of the database