单选题public class X {   public static void main （Stringargs） {   String s1 = new String （“true”）；   Boolean b1 = new Boolean （true）；   if （s2.equals（b1）） {   System.out.printIn（“Equal”）；   }   }   }   What is the result？ （）AThe program runs and prints nothi

第1题：

public class foo {   public static void main （stringargs）   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2题：

public class Alpha{  public static void main（ string[] args ）{  if （ args.length == 2 ） {  if （ args.[0].equalsIgnoreCase（“-b”） ）  System.out.println（ new Boolean（ args[1] ））；  }  }  }   And the code is invoked by using the command： java Alpha –b TRUE   What is the result？（）  

• A、 true
• B、 null
• C、 false
• D、 Compilation fails.
• E、 The code runs with no output.
• F、 An exception is thrown at runtime.

第3题：

第4题：

public class X {  public static void main （String[]args）  {  String s1 = new String （“true”）；  Boolean b1 = new Boolean （true）；  if （s2.equals（b1））   {  System.out.printIn（“Equal”）；  }  }  }      What is the result？（）  

• A、 The program runs and prints nothing.
• B、 The program runs and prints “Equal”
• C、 An error at line 5 causes compilation to fail.
• D、 The program runs but aborts with an exception.

第5题：

public class X {   public static void main （Stringargs） {   int a = new int [1]   modify（a）；   System.out.printIn（a[0]）；   }   public static void modify （int a） {   a[0] ++；    }    }   What is the result？（）  

• A、 The program runs and prints “0”
• B、 The program runs and prints “1”
• C、 The program runs but aborts with an exception.
• D、 An error “possible undefined variable” at line 4 causes compilation to fail.
• E、 An error “possible undefined variable” at line 9 causes compilation to fail.

第6题：

1. public class X {  2. public static void main （String[]args）   {  3. int [] a = new int [1]  4. modify（a）；  5. System.out.printIn（a[0]）；  6. }  7.    8. public static void modify （int[] a）  {  9.   a[0] ++；  10.    } 11. }       What is the result？（）

• A、 The program runs and prints “0”
• B、 The program runs and prints “1”
• C、 The program runs but aborts with an exception.
• D、 An error “possible undefined variable” at line 4 causes compilation to fail.
• E、 An error “possible undefined variable” at line 9 causes compilation to fail.

第7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8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9题：

public class X {   public static void main （Stringargs） {   String s1 = new String （“true”）；   Boolean b1 = new Boolean （true）；   if （s2.equals（b1）） {   System.out.printIn（“Equal”）；   }   }   }   What is the result？ （） 

• A、 The program runs and prints nothing.
• B、 The program runs and prints “Equal”
• C、 An error at line 5 causes compilation to fail.
• D、 The program runs but aborts with an exception.

第10题：

 public class X {   public static void main （String[]args）   {   string s = new string （“Hello”）；   modify（s）；   System.out.printIn（s）；   }   public static void modify （String s）  {   s += “world!”；      }   }      What is the result？（）    

• A、 The program runs and prints “Hello”
• B、 An error causes compilation to fail.
• C、 The program runs and prints “Hello world!”
• D、 The program runs but aborts with an exception.