COMPUTER APPLICATIONS
DATABASE MANAGEMENT SYSTEMS
|
Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
|
|
|
Entity-relationship diagram
|
|
|
Entity diagram
|
|
|
Database diagram
|
|
|
Architectural representation
|
Detailed explanation-1: -1. Which of the following gives a logical structure of the database graphically? Explanation: E-R diagrams are simple and clear-qualities that may well account in large part for the widespread use of the E-R model. Explanation: Dashed lines link attributes of a relationship set to the relationship set.
Detailed explanation-2: -Logical data modeling belongs to the entity relationship model, built using an Entity Relationship Diagram (known as ERD), a standard modeling technique used as a communication tool by data modelers worldwide. Within it are the complete set of business requirements but not technical components.
Detailed explanation-3: -An Entity–relationship model (ER model) describes the structure of a database with the help of a diagram, which is known as Entity Relationship Diagram (ER Diagram). An ER model is a design or blueprint of a database that can later be implemented as a database.
Detailed explanation-4: -The correct answer is schema. The schema describes the structure of the database.