Nest 0 Cart
Nest Account
Popular Exams
All Categories...
Nest
Nest 0
Contact
Log In / Sign Up
Copyright 2024 © store. All rights reserved.
Home Oracle 1z0-851

Oracle 1z0-851 Exam Practice Questions (P. 4)

  • Full Access (260 questions)
  • Six months of Premium Access
  • Access to one million comments
  • Seamless ChatGPT Integration
  • Ability to download PDF files
  • Anki Flashcard files for revision
  • No Captcha & No AdSense
  • Advanced Exam Configuration
Get Contributor Access
Question #16
Given:
01. public class Blip {
02. protected int blipvert(int x) { return 0; }
03. }
04. class Vert extends Blip {
05. // insert code here
06. }
Which five methods, inserted independently at line 5, will compile? (Choose five.)
  1. A
    public int blipvert(int x) { return 0; }
  2. B
    private int blipvert(int x) { return 0; }
  3. C
    private int blipvert(long x) { return 0; }
  4. D
    protected long blipvert(int x) { return 0; }
  5. E
    protected int blipvert(long x) { return 0; }
  6. F
    protected long blipvert(long x) { return 0; }
  7. G
    protected long blipvert(int x, int y) { return 0; }

Correct Answer:
ACEFG
private int blipvert(int x) { return 0; } - Cannot reduce the visibility of the inherited method from Blip protected long blipvert(int x) { return 0; } - The return type is incompatible with Blip. blipvert(int)

Question #17
Given:
01. class Super {
02. private int a;
03. protected Super(int a) { this.a = a; }
04. }
11. class Sub extends Super {
12. public Sub(int a) { super(a); }
13. public Sub() { this.a = 5; }
14. }
Which two, independently, will allow Sub to compile? (Choose two.)
  1. A
    Change line 2 to: public int a;
  2. B
    Change line 2 to: protected int a;
  3. C
    Change line 13 to: public Sub() { this(5); }
  4. D
    Change line 13 to: public Sub() { super(5); }
  5. E
    Change line 13 to:

Correct Answer:
CD

Question #18
Which Man class properly represents the relationship "Man has a best friend who is a Dog"?
  1. A
    class Man extends Dog { }
  2. B
    class Man implements Dog { }
  3. C
    class Man { private BestFriend dog; }
  4. D
    class Man { private Dog bestFriend; }
  5. E
    class Man { private Dog<bestFriend>; }
  6. F
    class Man { private BestFriend<dog>; }

Correct Answer:
D

Question #19
Given:
package test;
class Target {
public String name = "hello";
}
What can directly access and change the value of the variable name?
  1. A
    any class
  2. B
    only the Target class
  3. C
    any class in the test package
  4. D
    any class that extends Target

Correct Answer:
C

Question #20
Given:
11. abstract class Vehicle { public int speed() { return 0; }
12. class Car extends Vehicle { public int speed() { return 60; }
13. class RaceCar extends Car { public int speed() { return 150; } ...
21. RaceCar racer = new RaceCar();
22. Car car = new RaceCar();
23 Vehicle vehicle = new RaceCar();
24 System.out.println(racer.speed() + ", " + car.speed() + ", " + vehicle.speed
());
What is the result?
  1. A
    0, 0, 0
  2. B
    150, 60, 0
  3. C
    Compilation fails.
  4. D
    150, 150, 150
  5. E
    An exception is thrown at runtime.

Correct Answer:
D

Previous Questions Next Questions

All Pages