Question

Consider a database that is used to record the marks that students get in different exams of different course offerings.

Construct an E-R diagram that models exams as entities, and uses a ternary relationship. for the database.

Answer 1

An E-R diagram can be constructed for a database that records the marks that students get in different exams of different course offerings. Exams can be represented as entities and a ternary relationship can be used.

Step-by-step explanation:

An E-R diagram can be constructed for a database that records the marks that students get in different exams of different course offerings. In this scenario, the exams can be represented as entities in the diagram.

To model exams using a ternary relationship, we can consider including three entities: Students, Courses, and Exams. The relationship among these entities would be that a student takes a course and has an exam in that course. This ternary relationship can be represented by a diamond shape in the E-R diagram.

For example:

• A student can take multiple courses.

• A course can have multiple exams.
• A student can have multiple exams in different courses.

The E-R diagram can include these entities and their relationships, with appropriate attributes for each entity to store the relevant information about marks, such as student ID, course ID, and exam marks.