Database Entities and Attributes

What is an entity in the context of a database?

• A collection of unique objects of different types.

• A collection of objects of the same type that exists in the data environment.

• Data that cannot be collected or stored.

• A field or column in a database table.

Which of the following is generally considered a suitable example of an entity?

• A feeling

• A thought

• A person

• A dream

Which of the following items found in a computer lab would be considered an entity?

• The Wi-Fi signal

• The sound from the speakers

• A computer monitor

• The electricity powering the lab

What is the standard symbol used to represent an entity in a database diagram?

• A circle

• A diamond

• A rectangle

• An oval

What is an attribute in the context of a database?

• A unique identifier for an entity.

• A collection of objects of the same type.

• A field or column that describes the characteristics of an entity.

• A relationship between two or more entities.

Which of the following are attributes of a teacher entity?

• Name, IC number, Weight, Height

• Name, School, Subject, Grade

• Name, Student ID, Class, GPA

• Name, Address, Phone number, Salary

What symbol is used to represent an attribute in a diagram?

• Rectangle

• Diamond

• Oval

• Square

What symbol is used to represent an entity in a diagram?

• Oval

• Rectangle

• Diamond

• Circle

In a relational database, what does each table represent?

• A record

• An attribute

• An entity

• A relationship

In a relational database, what does each row in a table represent?

• A record

• An attribute

• An entity

• A relationship