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    當(dāng)前位置:高考升學(xué)網(wǎng) > 招聘筆試題 > 正文

    新華信國(guó)際信息咨詢JAVA工程師筆試題和面試題答案(三)

    更新:2023-09-18 13:10:37 高考升學(xué)網(wǎng)

      D.8

      8:

      String s=”Example String”;Which operation is not legal?

      String s=”Example String”;Which operation is not legal?

      A.int i=s.length();

      B.s[3]=”x”;

      C.String short_s=s.trim();

      D.String t=”root”+s;

      9:

      Give this class outline:

      class Example{

      private int x;

      //rest of class body…

      }

      Assuming that x invoked by the code java Example, which statement can made x be directly accessible in main() method of Example.java?

      Give this class outline:

      class Example{

      private int x;

      //rest of class body…

      }

      Assuming that x invoked by the code java Example, which statement can made x be directly accessible in main() method of Example.java?

      A.Change private int x to public int x

      B.change private int x to static int x

      C.Change private int x to protected int x

      D.change private int x to final int x

      10:

      What will happen when you attempt to compile and run the following code?

      class Base

      {

      int i = 99;

      public void amethod()

      {

      System.out.println("Base.amethod()");

      }

      Base()

      {

      amethod();

      }

      }

      public class Derived extends Base

      {

      int i = -1;

      public static void main(String argv[])

      {

      Base b = new Derived();

      System.out.println(b.i);

      b.amethod();

      }

      public void amethod()

      {

      System.out.println("Derived.amethod()");

      }

      }

      Choices:

      What will happen when you attempt to compile and run the following code?

      class Base

      {

      int i = 99;

      public void amethod()

      {

      System.out.println("Base.amethod()");

      }

      Base()

      {

      amethod();

      }

      }

      public class Derived extends Base

      {

      int i = -1;

      public static void main(String argv[])

      {

      Base b = new Derived();

      System.out.println(b.i);

      b.amethod();

      }

      public void amethod()

      {

      System.out.println("Derived.amethod()");

      }

      }

      Choices:

      A.Derived.amethod() -1 Derived.amethod()

      B.Derived.amethod() 99

      C.Compile time error

      D.Derived.amethod()

      11:

      What will be the result of executing the following code?

      // Filename; SuperclassX.java

      package packageX;

      public class SuperclassX

      {

      protected void superclassMethodX()

      {

      }

      int superclassVarX;

      }

      // Filename SubclassY.java

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