Database Design Notes Questions with Answers PDF Download - 71

The physical features of the database are specified, in

1. Virtual design phase
2. Physical design phase
3. View design phase
4. Logical design phase

Computer users see a set of application programs that hide details of the data types, at the level

1. Logical level
2. Virtual level
3. Physical level
4. Logical level

In accessing a website, a user must submit a digital certificate including the

1. Private key
2. Public key
3. Modulation key
4. Encryption key

The object-relational data model combines features of the object-oriented data model and

1. Entity relationship model
2. Relational Model
3. Semi-structured data model
4. Relation View data model

The projection that allows extension of operations, i.e. arithmetic and string functions to be used in the projection list, is known as

1. Embedded Projection
2. Extended Projection
3. Generalized Projection
4. Aggregation Projection