public class Delta {  static boolean foo（char c） {  System.o

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：

第4题：

public class Foo {  static int[] a；  static { a[0]=2； }  public static void main（ String[] args） {}  }  Which exception or error will be thrown when a programmer attempts to run this code？（） 

• A、 java.lang. StackOverflowError
• B、 java.lang.IllegalStateException
• C、 java.lang.ExceptionlnlnitializerError
• D、 java.lang.ArraylndexOutOfBoundsException

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（）”

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（）”.

第7题：

public class test （   private static int j = 0；     private static boolean methodB（int k） （  j += k；    return true；   ）    public static void methodA（int i） {    boolean b：   b = i < 10 | methodB （4）；    b = i < 10 || methodB （8）；   ）     public static void main （String args） } （    methodA （0）；  system.out.printIn（j）；   ）    ）   What is the result？（）  

• A、 The program prints “0”
• B、 The program prints “4”
• C、 The program prints “8”
• D、 The program prints “12”
• E、 The code does not complete.

第8题：

第9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

第10题：

class One {   public One foo（） { return this； }  }  class Two extends One {  public One foo（） { return this； }  }  class Three extends Two {   // insert method here  }  Which two methods， inserted individually， correctly complete the Three class？（）

• A、 public void foo（） { }
• B、 public int foo（） { return 3； }
• C、 public Two foo（） { return this； }
• D、 public One foo（） { return this； }
• E、 public Object foo（） { return this； }