Database - Data Modeling with ER Model - Discussion

Discussion :: Data Modeling with ER Model - General Questions (Q.No.3)


In a one-to-many relationship, the entity that is on the one side of the relationship is called a(n) ________ entity.

[A]. parent
[B]. child
[C]. instance
[D]. subtype

Answer: Option A


No answer description available for this question.

Mr Prashant Ihare said: (Nov 4, 2011)  
It is because as the concept suggest one to many ie the ralationship from one (A) entity to other inherihed or deriver entities (B, C, D) to which we simply call as the child entities. Thats it.

Ake said: (Dec 3, 2012)  
Parent should be one and it has many child in one to many relation.

Malika said: (Jul 2, 2017)  
What is an instance?

Mutyalu_Amballa said: (Dec 10, 2017)  
The combination of the system global area (SGA) and background processes. An instance is associated with one and only one database. In an Oracle Real Application Clusters configuration, multiple instances access a single database simultaneously.

System global area. A group of shared memory structures that contain data and control information for one Oracle database instance.

Background process:
A process that consolidates functions that would otherwise be handled by multiple Oracle programs running for each client process. The background processes asynchronously perform I/O and monitor other Oracle processes.

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