ER Diagram

The entity relationship set is represented in E-R diagram as

• Double diamonds

• Undivided rectangles

• Dashed lines

• Diamond

Consider a directed line(->) from the relationship set advisor to both entity sets instructor and student. This indicates _____cardinality

• One to many

• One to one
  
  

• c) Many to many

• d) Many to one

An entity set that does not have sufficient attributes to form a primary key is termed a ________

• Strong entity set

• Variant set

• Weak entity set

• Variable set

An ER diagram can express the overall_____of a database graphically

• view structure

• model structure

• logical structure

• Architectural structure

Dashed ellipses represents

• derived attributes

• multi valued attributes

• weak entity sets

• Total participation of an entity

An entity set that has attributes to form primary key,such entity set is termed as

• strong entity set

• weak entity set

• composite entity set

• owner entity set