Answer:
Explanation:
The following is written in Java and has the methods as requested in the question...
class Dog {
private double age;
public Dog(double v) {
assert v >= 0:" Not valid";
this.age = v;
}
public boolean isOlder(Dog dog1, Dog dog2) {
if (dog1.age > dog2.age) {
return true;
} else {
return false;
}
}
}
answer - surrogate key is a unique identifier used in databases for a modeled entity or an object. It is a unique key whose only significance is to act as the primary identifier of an object or entity and is not derived from any other data in the database and may or may not be used as the primary key.
<span>Schema classes define all objects that AD can handle.</span>