Module 7

Question 1

It is the process of creating a visual
representation of either a whole information system or parts of it to communicate connections between data points and structures.

Answer 1

Data modeling

Question 2

It is the process of creating a simplified visual diagram of a software system and the data elements it contains, using text and symbols to represent the data and how it flows

Answer 2

Data modeling

Question 3

These are built around business needs. Rules and requirements are defined upfront through feedback from business stakeholders so they can be incorporated into the design of a new system or adapted in the iteration of an existing one.

Answer 3

Data Model

Question 4

This high level model defines the entities and also their attributes and the relationships between them. It focuses on the business concepts and is independent of any specific database technology. They are also referred to as domain models and offer a big-picture view of what the system will contain, how it will be organized, and which business rules are involved.

Answer 4

Conceptual Data Models

Question 5

This model includes the information like data types, primary keys and constraints. It act as the bridge between the conceptual model and the physical implementation. It show how data entities are related and describe the data from a technical perspective.

Answer 5

Logical Data Models

Question 6

This model deals with the actual implementation details on a specific database management system. It includes considerations like indexing, partitioning and optimization for performance. They are specific to the database management system (DBMS) or application software that will be implemented. They define the structures that the database or a file system use to store and manage the data.

Answer 6

Physical Data Models