DBMS U2 - ERD

ER helps us to describe the the details in more __________ way.

• Precise

• casual

Descriptive properties possessed by each member of an entity set is called_______

Every attribute is defined by its set of values called _______

Attributes that can be divided into sub-parts is called?

• Composite

• Simple

• Descriptive

• Attribute

Expresses the number of entities to which another entity can be associated

• Relationship

• cardinality ratio

• Degree of Relationship

• All of the above

Which of the following cannot accept null value

• Foreign key

• candidate key

• Primary key

The __________of a weak entity set is a set of attributes that allows this distinction to be made

Association between relationships is expressed using?

• Generalization

• Specialization

• Association

• Aggregation

When translating weak entity set to relation, we may not translate the identifying relationship

• True

• False

• May be

Same entity set participates in a relationship set more than once, in different role is called?

• Degree of relationship

• Recursive relationship

• Identifying relationship