Related Questions

If there are two entities with a relationship between them, and one of the entities is completely dependent on the other, then which of the following must exist?
A Derived attribute
B Optional one cardinality
C Multi-valued attribute
D Weak entity
An enterprise data model is a relational model that shows the high-level entities for the organization and associations among those entities.
A True
B False
Which type of entity is related to two or more associated entities that each contain specialized attributes that apply to some but not all of the instances of the entity?
A Supertype entity
B Subtype entity
C Archetype entity
D Instance entity
Which of the following indicates the maximum number of entities that can be involved in a relationship?
A Minimum cardinality
B Maximum cardinality
C ERD
D Greater Entity Count
A train leaves a station A at 7 am and reaches another station B at 11 am. Another train leas B at 8 am and reaches A at 11:30 am. The two trains cross one another at
A 8:36 am
B 8:56am
C 9.00 am
D 9:24 am
Which of the following are the properties of entities?
A Groups
B Table
C Switchboard
D Attributes
Which of the following indicates the minimum number of entities that must be involved in a relationship?
A Minimum cardinality
B Maximum cardinality
C ERD
D Greater Entity Count (GEC)
Which of the following database activities determines the entities, attributes, and relationships of data?
A Conceptual data modeling
B Logical database design
C Physical database design and definition
D Database implementation
Which of the following situation requires the use of ID-dependent entities?
A Association relationships only
B Multivalued attributes only
C Archetype/instance relationships only
D All of the above use ID dependent entities
Which of the following is correct character entities for "Copyright" symbol?
A •
B Ÿ
C ©
D ³

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