In a supertype/subtype hierarchy, attributes are assigned at the ...

[Mr.Thesaxman]

In a supertype/subtype hierarchy, attributes are assigned at the highest logical level that is possible in the hierarchy.
 
  Indicate whether the statement is true or false

Question 2

What is clustering?
 
  What will be an ideal response?

[efwsefaw]

Answer to Question 1

TRUE

Answer to Question 2

Clustering is a technique used in some database management systems (such as Oracle) to allow adjacent secondary memory space to contain rows from several tables. A cluster is defined by the tables used as well as the column or columns used for clustering. To create a cluster in Oracle, for example, we would create a cluster first with a create cluster command and then reference the cluster when we create each individual table.