The completeness constraint may be one of the following: Total generalization or specialization , Partial generalization or specialization . Which is the default ?
A. Total
B. Partial
C. Should be specified
D. Cannot be determined
Answer:A
The completeness constraint may be one of the following: Total generalization or specialization , Partial generalization or specialization . Which is the default ?
A. Total B. Partial C. Should be specified D. Cannot be determined
Explanation:Partial generalization or specialization – Some higher-level entities may not belong to any lower-level entity set.