What is used to indicate a weak entity in an ERD?Double rectangular boxSingle rectangular boxDouble diamondSingle diamond

In an ERD, How is a Weak Entity Set represented?UnderlineDouble lineDouble diamondDouble rectangleRectangle

What is the purpose of a weak entity in an ER diagram?a.To represent an entity with a unique keyb.To represent an entity that depends on another entity for identificationc.To represent an entity that does not have attributesd.To represent an entity with a strong identity

In an ERD, what symbol is used to represent an entity?RectangleDiamondOvalArrow

A weak entity set in an E-R diagram is an entity set that:Marks : 1Negative Marks : 0Answer herehas a primary keymust be part of a one to many relationship setis not existence dependent on a dominant entitymust not participate as owner in an identifying relationship with another entity set

On an ER diagram, which shape is used to represent an entity?Select one:a.Circleb.Diamondc.Ovald.Rectangle