public class Test { private static int[] x; public static void main(String[] args) { System.out.println(x[0]); } } What is the result?()
public class Pet{ private String name; public Pet(){ System.out.print(1); } public Pet(String name){ System.out.print(2); } } public class Dog extends Pet{ public Dog(){ System.out.print(4); } public Dog(String name){ //这里隐藏了一句代码:super.pet(); this(); System.out.print(3); } } 执行new Dog(“棕熊”);后程序输出是哪项?()
class Foo { private int x; publicFoo(intx) {this.x=x; } public void setX( int x) { this.x = x; } public int getX() { return x; } } public class Gamma { static Foo fooBar( Foo foo) { foo = new Foo( 100); return foo; } public static void main( String[] args) { Foo foo = new Foo( 300); System.out.print( foo.getX() + “-“); Foo fooFoo = fooBar( foo); System.out.print( foo.getX() + “-“); System.out.print( fooFoo.getX() + “-“); foo = fooBar( fooFoo); System.out.print( foo.getX() + “-“); System.out.prmt( fooFoo.getX()); } } What is the output of this program?()
1. package foo; 2. 3. import java.util.Vector; 4. 5. private class MyVector extends Vector { 6. int i = 1; 7. public MyVector() { 8. i = 2; 9. } 10. } 11. 12. public class MyNewVector extends MyVector { 13. public MyNewVector () { 14. i = 4; 15. } 16. public static void main (String args []) { 17. MyVector v = new MyNewVector(); 18. } 19. } The file MyNewVector.java is shown in the exhibit. What is the result?()
Which description is correct for a private VLAN community port with respect to Layer 2 communications?()
Switch SW1 has been configured with Private VLANs. With that type of PVLAN port should thedefault gateway be configured?()
Which of the following network devices uses NAT to convert private IP addresses into public IPaddresses?()
public class SyncTest ( private int x; private int y; private synchronized void setX (int i) (x=1;) private synchronized void setY (int i) (y=1;) public void setXY(int 1)(set X(i); setY(i);) public synchronized Boolean check() (return x !=y;) ) Under which conditions will check () return true when called from a different class?
public class SyncTest { private int x; private int y; public synchronized void setX (int i) (x=1;) public synchronized void setY (int i) (y=1;) public synchronized void setXY(int 1)(set X(i); setY(i);) public synchronized Boolean check() (return x !=y;) } Under which conditions will check () return true when called from a different class?
Practice 2
Private school does not mean better. But it does mean expensive. Public schools in the US are paid for by money from everyone; private schools are not. Parents who send their children to private schools must pay to do so.
Parents may have enough money to pay for private schools. But these schools do not have to accept their children. Most private schools accept only children who are already doing well in school and are able to work quietly, Some take only boys or only girls. Classes are often quieter and less crowded than classes in public schools. This gives children a chance to learn more of what their teachers are trying to teach them.
Public schools do not teach religion. So some parents choose private religious schools for their children. These schools each belong to a church. 6 They give lessons about that religion. They give lessons in all the usual school subjects as well.
Children at many private schools wear special school uniforms, all exactly the same. At public schools, students wear what they want. They often dress in bright colors and tennis shoes. They sometimes invent new and wonderful fashions.