单选题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 print

第1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”

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

第3题：

public class Foo implements Runnable （  public void run （Thread t） {  system.out.printIn（“Running.”）；  }  public static void main （String[] args）  {  new thread （new Foo（））.start（）；  } ）   What is the result？（）      

• A、 An exception is thrown.
• B、 The program exists without printing anything.
• C、 An error at line 1 causes compilation to fail.
• D、 An error at line 2 causes the compilation to fail.
• E、 “Running” is printed and the program exits.

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.

第5题：

public class foo {  public static void main （string[]args）  try {return；}  finally {system.out.printIn（“Finally”）；}  }  What is the result？（）

• A、 The program runs and prints nothing.
• B、 The program runs and prints “Finally”
• C、 The code compiles， but an exception is thrown at runtime.
• D、 The code will not compile because the catch block is missing.

第6题：

public class Foo {   public void main （String args） {   system.out.printIn（“Hello World.”）；   }   }   What is the result？ （） 

• A、 An exception is thrown.
• B、 The code does no compile.
• C、 “Hello World.” Is printed to the terminal.
• D、 The program exits without printing anything.

第7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.printIn（foo. i）；  }   }   What is the result？（）  

• A、 Compilation will fail.
• B、 Compilation will succeed and the program will print “3”
• C、 Compilation will succeed but the program will throw a ClassCastException at line 6.
• D、 Compilation will succeed but the program will throw a ClassCastException at line 7.

第8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.

第9题：

public class Test {  public static void main（ String[] args） {  String foo = args[1]；  String bar = args[2]；  String baz = args[3]；  System.out.println（“baz = “ + baz）； }  }   And the command line invocation： java Test red green blue   What is the result？（）  

• A、 baz =
• B、 baz = null
• C、 baz = blue
• D、 Compilation fails.
• E、 An exception is thrown at runtime.

第10题：

public class Test {  public static void main （String[]args） {  String foo = args[1]；  String bar = args[2]；  String baz = args[3]；  System.out.printIn（“baz = ” + baz）；  }  }  And the output：  Baz = 2  Which command line invocation will produce the output？（）  

• A、 Java Test 2222
• B、 Java Test 1 2 3 4
• C、 Java Test 4 2 4 2
• D、 Java Test 4 3 2 1