Java认证考试

String foo = “blue”;    Booleanbar = new Boolean [1];    if (bar[0]) {    foo = “green”;    }   What is the result?()  A、 Foo has the value of “”B、 Foo has the value of null.C、 Foo has the value of “blue”D、 Foo has the value of “green”E、 An exception is 

题目

String foo = “blue”;    Booleanbar = new Boolean [1];    if (bar[0]) {    foo = “green”;    }   What is the result?()  

  • A、 Foo has the value of “”
  • B、 Foo has the value of null.
  • C、 Foo has the value of “blue”
  • D、 Foo has the value of “green”
  • E、 An exception is thrown.
  • F、 The code will not compile.
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相似问题和答案

第1题:

public class test(  public static void main(string[]args){  string foo = args [1];  string foo = args [2];  string foo = args [3];  }  )  And command line invocation: Java Test red green blue   What is the result?()  

  • A、 Baz has the value of “”
  • B、 Baz has the value of null
  • C、 Baz has the value of “red”
  • D、 Baz has the value of “blue”
  • E、 Bax has the value of “green”
  • F、 The program throws an exception.

正确答案:F

第2题:

public class Base {  public static final String FOO = “foo”;  public static void main(String[] args) {  Base b = new Base();  Sub s = new Sub();  System.out.print(Base.FOO);  System.out.print(Sub.FOO);  System.out.print(b.FOO);  System.out.print(s.FOO);  System.out.print(((Base)s).FOO);  } }  class Sub extends Base {public static final String FOO=bar;}  What is the result?() 

  • A、 foofoofoofoofoo
  • B、 foobarfoobarbar
  • C、 foobarfoofoofoo
  • D、 foobarfoobarfoo
  • E、 barbarbarbarbar
  • F、 foofoofoobarbar
  • G、 foofoofoobarfoo

正确答案:D

第3题:

GiventheJSPcode:<%request.setAttribute("foo","bar");%>andtheClassictaghandlercode:5.publicintdoStartTag()throwsJspException{6.//insertcodehere7.//returnint8.}Assumetherearenoother"foo"attributesinthewebapplication.WhichinvocationonthepageContextobject,insertedatline6,assigns"bar"tothevariablex?()

A.Stringx=(String)pageContext.getAttribute("foo")

B.Stringx=(String)pageContext.getRequestScope("foo")

C.ItisNOTpossibletoaccessthepageContextobjectfromwithindoStartTag

D.Stringx=(String)pageContext.getRequest().getAttribute("foo")

E.Stringx=(String)pageContext.getAttribute("foo",PageContext.ANY_SCOPE)


参考答案:D

第4题:

public class Delta {  static boolean foo(char c) {  System.out.print(c);  return true;  }  public static void main( String[] argv ) {  int i =0;  for ( foo(‘A’); foo(‘B’)&&(i<2); foo(‘C’)){  i++ ;  foo(‘D’);  }  }  }  What is the result?()  

  • A、 ABDCBDCB
  • B、 ABCDABCD
  • C、 Compilation fails.
  • D、 An exception is thrown at runtime.

正确答案:A

第5题:

3. string foo = “ABCDE”;  4. foo.substring(3);  5. foo.concat(“XYZ”);  6.     Type the value of foo at line 6.()


正确答案:ABCDE

第6题:

public class Test {   public static void main (String args) {  string foo = “blue”;  string bar = foo;   foo = “green”;   System.out.printIn(bar);   }   }   What is the result?()  

  • A、 An exception is thrown.
  • B、 The code will not compile.
  • C、 The program prints “null”
  • D、 The program prints “blue”
  • E、 The program prints “green”

正确答案:D

第7题:

int index = 1;   String test = new String;   String foo = test[index];  What is the result?()

  • A、  Foo has the value “”
  • B、 Foo has the value null
  • C、 An exception is thrown
  • D、 The code will not compile

正确答案:B

第8题:

publicclassDelta{staticbooleanfoo(charc){System.out.print(c);returntrue;}publicstaticvoidmain(String[]argv){inti=0;for(foo(‘A’);foo(‘B’)&&(i<2);foo(‘C’)){i++;foo(‘D’);}}}Whatistheresult?()

A.ABDCBDCB

B.ABCDABCD

C.Compilationfails.

D.Anexceptionisthrownatruntime.


参考答案:A

第9题:

5. String foo = “base”;   6. foo.substring(0,3);   7. foo.concat(“ket”)  8.   Type the value of foo at line 8.()


正确答案:BASE

第10题:

public class Test {  public static void main(String args[]) {  class Foo {  public int i = 3; }  Object o = (Object)new Foo();   Foo foo = (Foo)o;  System.out.println(“i = “ + foo.i); }  }  What is the result?()  

  • A、 i = 3
  • B、 Compilation fails.
  • C、 A ClassCastException is thrown at line 6.
  • D、 A ClassCastException is thrown at line 7.

正确答案:A

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