SAD Design Unit-4

The primary tool used in structured design is a:

• structure chart

• data-flow diagram

• program flowchart

• module

A Relation is a.............

• A subset of a cartesian product of a list of attributes

• A subset of a cartesian product of a list of domains

• A subset of a Cartesian product of a list of tuple

• A subset of a Cartesian product of a list of relations

In Prototyping

• BASIC is used

• COBOL is used

• 4GLs are used

• system is documented

An example of a hierarchical data structure is

• Array

• Link list

• Tree

• Ring

A system contains a ___ which is planned to reach a specific goal.

• Communication

• Structure and behavior

• Interdependence

• None of the above mentioned

What is the major goal of a System Analysis and Design?

• Instructions

• Improve organizational systems

• Communication

• None of the above mentioned

............... are the Process of Logical Database Design

• Develop logical data Models for each known user interface

• Combine normalized data requirements

• Translate the conceptual E-R data model for the application or enterprise

• Compare the logical design with the translated E-R model

• All of the mentioned above

An important database objective is changing hardware and storage procedures or adding new data without having to rewrite application programs.

• True

• False

.............. data model defines what the system contains.

• Logical data model

• Physical data model

• Conceptual data model

• None

The data model is a conceptual representation of:

• Data objects

• The Rules

• The associations between different data objects

• All of the mentioned