Dbms Quiz 1

In an ER diagram, which symbol is typically used to represent an entity?

• Oval

• Diamond

• Rectangle

• Triangle

Which element in an ER diagram represents a relationship?

• Diamond

• Rectangle

• Oval

• Hexagon

In an ER diagram, an attribute is usually represented by:

• Oval

• Rectangle

• Diamond

• Parallelogram

Which attribute type can have multiple values?

• Derived attribute

• Composite attribute

• Multivalued attribute

• Primary attribute

Which attribute type is calculated from other attributes?

• Derived attribute

• Composite attribute

• Multivalued attribute

• Simple attribute

In ER diagrams, a weak entity is represented by:

• Dashed diamond

• Double rectangle

• Single rectangle

• Bold diamond

The relationship between a weak entity and its owner entity is represented by:

• Dashed line

• Double diamond

• Single diamond

• Wavy line

A relationship that involves more than two entities is called:

• Binary relationship

• Unary relationship

• Ternary relationship

• Strong relationship

In ER diagrams, a one-to-many relationship is represented by:

• 1:1

• 1:N

• N:1

• M:N

Which of the following is an example of a unary relationship?

• Employee manages Employee

• Student enrolled in Course

• Doctor treats Patient

• Supplier supplies Product