A.4

B.3

C.An exception is thrown at runtime.

D.5

A.@SuppressWarnings on the main and print methods

B.@SuppressWarnings("unchecked") on main and @SafeVarargs on the print method

C.@SuppressWarnings("rawtypes") on main and @SafeVarargs on the print method

D.@SuppressWarnings("all") on the main and print methods

A.It is declared with a single abstract method.

B.It must be defined with the public access modifier.

C.It must be annotated with @FunctionalInterface.

D.It is declared with a single default method.

E.It cannot have any private methods and static methods.

A.The compilation fails.

B.Y@<< hashcode>>

C.HH

D.Null

A.Insert Comparator<Person> on line 1.
Insert
public int compareTo(Person person) {
return person.name.compareTo(this.name);
}
on line 2.

B.Insert Comparator<Person> on line 1.
Insert
public int compare(Person person) {
return person.name.compare(this.name);
}
on line 2.

C.Insert Comparator<Person> on line 1.
Insert
public int compare(Person p1, Person p2) {
return p1.name.compare(p2.name);
}
on line 2.

D.Insert Comparable<Person> on line 1.
Insert
public int compare(Person p1, Person p2) {
return p1.name.compare(p2.name);
}
on line 2.