Online Access Free 1Z0-819 Exam Questions

Given:

Assuming that this code compiles correctly, which three statements are true? (Choose three.)

• A.B is a subtype of A.
• B.A is a subtype of B.
• C.A cannot be abstract.
• D.A cannot be final.
• E.B cannot be final.
• F.B cannot be abstract.

Given:
List<String> longlist = List.of("Hello","World","Beat");
List<String> shortlist = new ArrayList<>();
Which code fragment correctly forms a short list of words containing the letter "e"?

• A.Option C
• B.Option D
• C.Option B
• D.Option A

Given:

You want the code to produce this output:
John
Joe
Jane
Which code fragment should be inserted on line 1 and line 2 to produce the output?

• A.Insert Comparator<Person> on line 1.
  Insert
  public int compare(Person person) {
  return person.name.compare(this.name);
  }
  on line 2.
• B.Insert Comparable<Person> on line 1.
  Insert
  public int compare(Person p1, Person p2) {
  return p1.name.compare(p2.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 Comparator<Person> on line 1.
  Insert
  public int compareTo(Person person) {
  return person.name.compareTo(this.name);
  }
  on line 2.

Given:

What is the result?

• A.At once 1
• B.An indexOutofBoundsException is thrown at runtime.
• C.Hat at store 4
• D.Hat at store 1
• E.At once 0

Given:
public class X {
}
and
public final class Y extends X {
}
What is the result of compiling these two classes?

• A.The compilation fails because there is no zero args constructor defined in class X.
• B.The compilation fails because a final class cannot extend another class.
• C.The compilation fails because either class X or class Y needs to implement the toString() method.
• D.The compilation succeeds.