Given the following code fragment: public void create() { Vector myVect; myVect = new Vector(); } Which of the following statements are true?()
第1题:
A. It does not scale well
B. It converges slower than OSPF
C. It is a proprietary protocol
D. It is a distance vector protocol
第2题:
1. public class a { 2. public void method1() { 3. try { 4. B b=new b(); 5. b.method2(); 6. // more code here 7. } catch (TestException te) { 8. throw new RuntimeException(te); 9. } 10. } 11. } 1. public class b { 2. public void method2() throws TestException { 3. // more code here 4. } 5. } 1. public class TestException extends Exception { 2. } Given: 31. public void method() { 32. A a=new a(); 33. a.method1(); 34. } Which is true if a TestException is thrown on line 3 of class b?()
第3题:
给出下面的代码段,下面的哪些陈述为真? ( ) public void create() { Vector myVect; myVect=new Vector(); } Ⅰ:第2行的声明不会为变量myVect分配内存空间。 Ⅱ:第2行的声明分配一个到Vector对象的引用的内存空间。 Ⅲ:第2行语句创建一个Vector类对象。 Ⅳ:第3行语句创建一个Vector类对象。
A.Ⅱ、Ⅲ、Ⅳ
B.Ⅱ、Ⅲ、Ⅳ
C.Ⅰ、Ⅲ
D.Ⅰ、Ⅳ
第4题:
Given the following code: 1) public void modify() { 2) int i, j, k; 3) i = 100; 4) while ( i > 0 ) { 5) j = i * 2; 6) System.out.println (" The value of j is " + j ); 7) k = k + 1; 8) i--; 9) } 10) } Which line might cause an error during compilation?()
第5题:
You create a Microsoft ASP.NET application by using the Microsoft .NET Framework version 3.5. You create a page that contains the following code fragment:
第6题:
Which of the following is a disadvantage of using the EIGRP protocol?()
第7题:
Which lines of code are valid declarations of a native method when occurring within the declaration of the following class?() public class Qf575 { // insert declaration of a native method here }
第8题:
A.move the line 12 print statement into the foo() method
B.change line 7 to public synchronized void go() {
C.change the variable declaration on line 2 to private volatile int x;
D.wrap the code inside the foo() method with a synchronized( this ) block
E.wrap the for loop code inside the go() method with a synchronized block synchronized(this){ //for loop code here }
第9题:
1. public class A { 2. public void method1() { 3. B b=new B(); 4. b.method2(); 5. // more code here 6. } 7. } 1. public class B { 2. public void method2() { 3.C c=new C(); 4. c.method3(); 5. // more code here 6. } 7. } 1. public class C { 2. public void method3() { 3. // more code here 4. } 5. } Given: 25. try { 26. A a=new A(); 27. a.method1(); 28. } catch (Exception e) { 29. System.out.print(”an error occurred”); 30. } Which two are true if a NullPointerException is thrown on line 3 of class C?()
第10题:
package foo; import java.util.Vector; private class MyVector extends Vector { int i = 1; public MyVector() { i = 2; } } public class MyNewVector extends MyVector { public MyNewVector() { i = 4; } public static void main(String args[]) { MyVector v = new MyNewVector(); } } What is the result?()