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Renew 1Z0-852 Simple Questions Latest Practice Test Questions VCE PDF Dumps
Qustion No. 1
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()
25.
+ ", " + vehicle.speed());
What is the result?
A. 0, 0, 0
B. 150, 60, 0
C. Compilation fails.
D. 150, 150, 150
E. An exception is thrown at runtime.
Answer: D
Explanation:
Qustion No. 2
Given:
11.
public class PingPong implements Runnable
12.
synchronized void hit(long n) {
13.
for(int i = 1; i < 3; i++)
14.
System.out.print(n + "-" + i + " ");
15.
16.
public static void main(String[] args)
17.
new Thread(new PingPong()).
start();18.
new Thread(new PingPong()).start();
19.
20.
public void run()
21.
hit(Thread.currentThread().getId());
22.
23.
}
Which two statements are true? (Choose two.)
A. The output could be 8-1 7-2 8-2 7-1
B. The output could be 7-1 7-2 8-1 6-1
C. The output could be 8-1 7-1 7-2 8-2
D. The output could be 8-1 8-2 7-1 7-2
Answer: C,D
Explanation:
Qustion No. 3
Given:
11.
public interface A111
12.
String s = "yo";
13.
public void method1();
14.
17. interface B
20.
interface C extends A111, B
21.
public void method1();
22.
public void method1(int x);
23.
What is the result?
A. Compilation succeeds.
B. Compilation fails due to multiple errors.
C. Compilation fails due to an error only on line 20.
D. Compilation fails due to an error only on line 21.
E. Compilation fails due to an error only on line 22.
F. Compilation fails due to an error only on line 12.
Answer: A
Explanation:
Qustion No. 4
Given that:
Gadget has-a Sprocket and
Gadget has-a Spring and
Gadget is-a Widget and
Widget has-a Sprocket
Which two code fragments represent these relationships? (Choose two.)
A. class Widget Sprocket s;
class Gadget extends Widget Spring s;
B. class Widget
class Gadget extends Widget Spring s1; Sprocket s2;
C. class Widget Sprocket s1; Spring s2;
class Gadget extends Widget
D. class Gadget Spring s;
class Widget extends GadgetSprocket s;
E. class Gadget
class Widget extends GadgetSprocket s1; Spring s2;
F. class Gadget Spring s1; Sprocket s2;
class Widget extends Gadget
Answer: A,C
Explanation:
Qustion No. 5
Given:
1.
class ClassA
2.
public int numberOfInstances;
3.
protected ClassA(int numberOfInstances) {
4.
this.numberOfInstances = numberOfInstances;
5.
6.
}
7.
public class ExtendedA extends ClassA
8.
private ExtendedA(int numberOfInstances) {
9.
super(numberOfInstances);
10.
11.
public static void main(String[] args)
12.
ExtendedA ext = new ExtendedA(420);
13.
System.out.print(ext.numberOfInstances);
14.
15.
}
Which statement is true?
A. 420 is the output.
B. An exception is thrown at runtime.
C. All constructors must be declared public.
D. Constructors CANNOT use the private modifier.
E. Constructors CANNOT use the protected modifier.
Answer: A
Explanation:
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