Multiple choice

Which one of the following objects in object-oriented databases has a type hierarchy and set/subset constraints have been enforced on it?

  1. Inheritance

  2. Operator overloading

  3. Extents

  4. Polymorphism

  5. Encapsulation

Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

This is an object in object-oriented databases, which has a type hierarchy and set/subset constraints have been enforced on it.