1. package foo;̳

题目

1. package foo; 2.  3. import java.util.Vector; 4.  5. protected class MyVector Vector { 6. init 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. } What is the result?()  

  • A、 Compilation succeeds.
  • B、 Compilation fails because of an error at line 5.
  • C、 Compilation fails because of an error at line 6.
  • D、 Compilation fails because of an error at line 14.
  • E、 Compilation fails because of an error at line 17.
参考答案和解析
正确答案:B
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相似问题和答案

第1题:

package com.sun.sjcp;public class Commander{public static void main(String[]args){//more code here}}Assume that the class fileis located in /foo/com/sun/sjcp/,the current directory is/foo/,and that the classpath contains.(current directory).Which command line correctly runs Commander?()

A.java Commander

B.java com.sim.sjcp.Commander

C.java com/sun/sjcp/Commander

D.java-cpcom.sun.sjcp Commander

E.java-cpcom/sun/sjcp Commander


参考答案:B

第2题:

Assume a tag handler extends TagSupport. Which is used within the tag handler to get an attribute “foo” that is in the application scope?()

  • A、 pageContext.getAttribute(“foo”);
  • B、 getPageContext().getAttribute(“foo”);
  • C、 pageContext.getApplicationScope(“foo”);
  • D、 pageContext.getAttribute(“foo”,pageContext.APPLICATION_SCOPE).getAttribute(“foo”);
  • E、 getPageContext().getScope(pageContext.APPLICATION_SCOPE).getAttribute(“foo”);

正确答案:D

第3题:

Javascript中,foo对象有att属性,那么以下获取att属性值的表达式哪个是错误的?()

A、foo.att

B、foo[“att“]

C、foo{“att“}

D、foo[“a“+“t“+“t“]


参考答案:C

第4题:

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?()

  • A、 300-100-100-100-100
  • B、 300-300-100-100-100
  • C、 300-300-300-100-100
  • D、 300-300-300-300-100

正确答案:B

第5题:

package foo; public class Outer (  public static class Inner (  )  )   Which statement is true? () 

  • A、 An instance of the Inner class can be constructed with “new Outer.Inner ()”
  • B、 An instance of the inner class cannot be constructed outside of package foo.
  • C、 An instance of the inner class can only be constructed from within the outer class.
  • D、 From within the package bar, an instance of the inner class can be constructed with “new inner()”

正确答案:A

第6题:

package foo;  public class Outer {  public static class Inner {  }  }   Which statement is true?() 

  • A、 Compilation fails.
  • B、 An instance of the Inner class can be constructed with “new Outer.Inner()”.
  • C、 An instance of the Inner class cannot be constructed outside of package foo.
  • D、 An instance of the Inner class can be constructed only from within the Outer class.
  • E、 From within the package foo, and instance of the Inner class can be constructed with “new Inner()”.

正确答案:B

第7题:

Which the three are valid declarations of a float?()

  • A、 float foo = -1;
  • B、 float foo = 1.0;
  • C、 float foo = 42el:
  • D、 float foo = 2.02f:
  • E、 float foo = 3.03d:

正确答案:A,D,F

第8题:

Given:1.<%int[]nums={42,420,4200};2.request.setAttribute("foo",nums);%>3.${5+3lt6}4.${requestScope[’foo’][0]ne10div0}5.${10div0}Whatistheresult?()

A.Truetrue

B.Falsetrue

C.Falsetrue0

D.TruetrueInfinity

E.FalsetrueInfinity


参考答案:E

第9题:

Given an EL function foo, in namespace func, that requires a long as a parameter and returns a Map,which two are valid invocations of function foo?()

  • A、${func(1)}
  • B、${foo:func(4)}
  • C、${func:foo(2)}
  • D、${foo(5):func}
  • E、${func:foo("easy")}
  • F、${func:foo("3").name}

正确答案:C,F

第10题:

Which three are valid declarations of a float? () 

  • A、 Float foo = -1;
  • B、 Float foo = 1.0;
  • C、 Float foo = 42e1;
  • D、 Float foo = 2.02f;
  • E、 Float foo = 3.03d;
  • F、 Float foo = 0x0123;

正确答案:A,D,F

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