1Z0-851 무료 덤프문제 온라인 액세스

Given:
3.interface Animal { void makeNoise(); }
4.class Horse implements Animal {
5.Long weight = 1200L;
6.public void makeNoise() { System.out.println("whinny"); }
7.}
8.public class Icelandic extends Horse {
9.public void makeNoise() { System.out.println("vinny"); }
10.public static void main(String[] args) {
11.Icelandic i1 = new Icelandic();
12.Icelandic i2 = new Icelandic();
13.Icelandic i3 = new Icelandic();
14.i3 = i1; i1 = i2; i2 = null; i3 = i1;
15.}
16.}
When line 15 is reached, how many objects are eligible for the garbage collector?

• A.0
• B.4
• C.1
• D.3
• E.2
• F.6

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 7-1 7-2 8-1 6-1
• B.The output could be 8-1 7-2 8-2 7-1
• C.The output could be 8-1 8-2 7-1 7-2
• D.The output could be 8-1 7-1 7-2 8-2

Given:
5.class A {
6.void foo() throws Exception { throw new Exception(); }
7.}
8.class SubB2 extends A {
9.void foo() { System.out.println("B "); }
10.}
11.class Tester {
12.public static void main(String[] args) {
13.A a = new SubB2();
14.a.foo();
15.}
16.}
What is the result?

• A.An Exception is thrown with no other output.
• B.B
• C.Compilation fails due to an error on line 14.
• D.B, followed by an Exception.
• E.Compilation fails due to an error on line 9.

Click the Exhibit button. What is the result?

• A.4321
• B.0000
• C.Compilation fails because of an error in line 18.
• D.An exception is thrown at runtime.

Given:
1.public class BuildStuff {
2.public static void main(String[] args) {
3.Boolean test = new Boolean(true);
4.Integer x = 343;
5.Integer y = new BuildStuff().go(test, x);
6.System.out.println(y);
7.}
8.int go(Boolean b, int i) {
9.if(b) return (i/7);
10.return (i/49);
11.}
12.}
What is the result?

• A.343
• B.Compilation fails.
• C.49
• D.7
• E.An exception is thrown at runtime.