1. class Over{   2. int doIt（long x） { return 3；}   3. }   4.   5. class Under extends Over{   6. //insert code here 7. }   和四个方法：   short doIt（int y） {return 4；}   int doIt（long x，long y）{return 4；}   private int doIt（Short y）{ return 4；}   protected in

题目

1. class Over{   2. int doIt（long x） { return 3；}   3. }   4.   5. class Under extends Over{   6. //insert code here 7. }   和四个方法：   short doIt（int y） {return 4；}   int doIt（long x，long y）{return 4；}   private int doIt（Short y）{ return 4；}   protected int doIt（long x）{return 4；}   分别插入到第6行，有几个可以通过编译？（）  

  • A、2
  • B、3
  • C、4
  • D、0
  • E、1
相似考题

1.When the class was over, every one made _______ the dining room.A. byB. aloneC. forD. from

2.1． Everyone in our class ________ ．A． like singingB． likes play footballC． like watch TVD． likes playing games

3.He kept on __________(talk) until the class was over.

4.Our class ____________ a wonderful folk dance, which caused a lot of applause(掌声)when it was over.A.put upB.put awayC.put asideD.put on

更多“1. class Over{ &”相关问题

  • 第1题：

    1． You must ________ a plan as soon as possible．

    A．come up

    B．come out

    C．come up with

    D．come over


    正确答案：C
    I．1．C【解析】come up with意为想出，拿出。come up 意为长出，发生，被提及．come out意为出现，出版发行．come over突然感到，改变立场等。

  • 第2题：

    1. public class Target {  2. private int i = 0；  3. public int addOne（） {  4. return ++i；  5. }  6. }  And：  1. public class Client {  2. public static void main（String[] args） {  3. System.out.println（new Target（）.addOne（））；  4. }  5. }  Which change can you make to Target without affecting Client？（） 

    • A、 Line 4 of class Target can be changed to return i++；
    • B、 Line 2 of class Target can be changed to private int i = 1；
    • C、 Line 3 of class Target can be changed to private int addOne（） {
    • D、 Line 2 of class Target can be changed to private Integer i = 0；

    正确答案:D

  • 第3题：

    Class TestException  1. public class TestException extends Exception {  2. } Class a：  1. public class a {  2.  3. public String sayHello（String name） throws TestException {  4.  5. if（name == null） {  6. throw new TestException（）；  7. }  8.  9. return “Hello “+ name；  10. }  11.  12. }  A programmer wants to use this code in an application： 45. A a=new A（）；  46. System.out.println（a.sayHello（”John”））；  Which two are true？（）

    • A、 Class a will not compile.
    • B、 Line 46 can throw the unchecked exception TestException.
    • C、 Line 45 can throw the unchecked exception TestException.
    • D、 Line 46 will compile if the enclosing method throws a TestException.
    • E、 Line 46 will compile if enclosed in a try block， where TestException is caught.

    正确答案:D,E

  • 第4题：

    1. public class A {  2. void A（） {  3. System.out.println（“Class A”）；  4. }  5. public static void main（String[] args） {  6. new A（）；  7. }  8. }  What is the result？（）  

    • A、 Class A
    • B、 Compilation fails.
    • C、 An exception is thrown at line 2.
    • D、 An exception is thrown at line 6.
    • E、 The code executes with no output.

    正确答案:E

  • 第5题：

    1. public class enclosingone （  2. public class insideone{}  3. ）  4. public class inertest（  5. public static void main （string[]args）（  6. enclosingone eo= new enclosingone （）；  7. //insert code here  8. ）  9. ）    Which statement at line 7 constructs an instance of the inner class？（）  

    • A、 InsideOnew ei= eo.new InsideOn（）；
    • B、 Eo.InsideOne ei = eo.new InsideOne（）；
    • C、 InsideOne ei = EnclosingOne.new InsideOne（）；
    • D、 EnclosingOne.InsideOne ei = eo.new InsideOne（）；

    正确答案:D

  • 第6题：

    多选题
    Given：  1. public class Method Over {  2. public void set Var （int a， int b， float c） {  3. }  4. }   Which two overload the set Var method（）？
    A

    private void set Var（int a， float c， int b） {}

    B

    protected void set Var（int a， int b， float c） {}

    C

    public int set Var（int a， float c， int b） {return a：}

    D

    public int set Var（int a， int b， float c） {return a：}

    E

    protected float set Var（int a， int b， float c） {return c：}


    正确答案： A,C
    解析： 暂无解析

  • 第7题：

    单选题
    Given classes defined in two different files：  1. package util；  2. public class BitUtils {  3. public static void process（byte[]） { /* more code here */ }  4. }  1. package app；  2. public class SomeApp {  3. public static void main（String[] args） {  4. byte[] bytes = new byte[256]；  5. // insert code here  6. }  7. }  What is required at line 5 in class SomeApp to use the process method of BitUtils？（）
    A

     process（bytes）；

    B

     BitUtils.process（bytes）；

    C

     util.BitUtils.process（bytes）；

    D

     SomeApp cannot use methods in BitUtils.

    E

     import util.BitUtils.*； process（bytes）；


    正确答案： E
    解析： 暂无解析

  • 第8题：

    单选题
    现有：  1. interface Animal {  2. void eat（）；  3. }  4.  5. // insert code here  6.  7. public class HouseCat extends Feline {  8. public void eat（） { }  9. }   和五个声明：  abstract class Feline implements Animal { }  abstract class Feline implements Animal { void eat（）； }  abstract class Feline implements Animal { public void eat（）； }  abstract class Feline implements Animal { public void eat（） { } }  abstract class Feline implements Animal { abstract public void eat（）； }  分别插入到第5行，有几个可以通过编译？（）
    A

    0

    B

    1

    C

    2

    D

    3


    正确答案： D
    解析： 暂无解析

  • 第9题：

    单选题
    1. public class a {  2. public void method1（） {  3. try {  4. B b=new b（）；  5. b.method2（）；  6. // more code here  7. } catch （TestException te） {  8. throw new RuntimeException（te）；  9. }  10. }  11. }  1. public class b {  2. public void method2（） throws TestException {  3. // more code here  4. }  5. }  1. public class TestException extends Exception {  2. }  Given：  31. public void method（） {  32. A a=new a（）；  33. a.method1（）；  34. }  Which is true if a TestException is thrown on line 3 of class b？（）
    A

     Line 33 must be called within a try block.

    B

     The exception thrown by method1 in class a is not required to be caught.

    C

     The method declared on line 31 must be declared to throw a RuntimeException.

    D

     On line 5 of class a， the call to method2 of class b does not need to be placed in a try/catch block.


    正确答案： B
    解析： 暂无解析

  • 第10题：

    多选题
    1. public class A {  2. public void method1（） {  3. B b=new B（）；  4. b.method2（）；  5. // more code here  6. }  7. }  1. public class B {  2. public void method2（） {  3.C c=new C（）；  4. c.method3（）；  5. // more code here  6. }  7. }  1. public class C {  2. public void method3（） {  3. // more code here  4. }  5. }  Given：  25. try {  26. A a=new A（）；  27. a.method1（）；  28. } catch （Exception e） {  29. System.out.print（”an error occurred”）；  30. }  Which two are true if a NullPointerException is thrown on line 3 of class C？（）
    A

    The application will crash.

    B

    The code on line 29 will be executed.

    C

    The code on line 5 of class A will execute.

    D

    The code on line 5 of class B will execute.

    E

    The exception will be propagated back to line 27.


    正确答案： D,C
    解析： 暂无解析

  • 第11题：

    单选题
    1. class Over{   2. int doIt（long x） { return 3；}   3. }   4.   5. class Under extends Over{   6. //insert code here 7. }   和四个方法：   short doIt（int y） {return 4；}   int doIt（long x，long y）{return 4；}   private int doIt（Short y）{ return 4；}   protected int doIt（long x）{return 4；}   分别插入到第6行，有几个可以通过编译？（）
    A

    2

    B

    3

    C

    4

    D

    0

    E

    1


    正确答案： C
    解析： 暂无解析

  • 第12题：

    单选题
    —How many girls are there in your class?—_____them ______ over twenty.
    A

    A number of; are

    B

    The number of; are

    C

    A number of; is

    D

    The number of; is


    正确答案： A
    解析：
    句意：—你们班有多少个女生？—女生的数量是二十多个。本题考查固定搭配的辨析以及主谓一致。表示“……的数量”用the number of表达，其谓语动词使用单数形式，因此D项符合题意。a number of表示“许多……”，做主语时，谓语动词应使用复数形式。

  • 第13题：

    For specific reason, the Owner may transfer the classification member of the vessel to another classification member which is covered by the IACS ‘Transfer of Class Agreement’. Which of the requirements listed below is disobey the IACS “Transfer of Class Agreement?（）

    • A、For all ships between 5 to 10 years of age a representative number of ballast spaces are to be examined.
    • B、For all ships between 10 to 20 years of age a representative number of cargo spaces are to be examined.
    • C、For all ships 15 years of age and over all overdue surveys and conditions of class completed by the gaining class society before the transfer of class can take place. 
    • D、For all ships which are 20 years of age and above or ships subject to ESP which are 15 years of age and above, a full Special Survey or Intermediate Survey, including docking, will be carried out.

    正确答案:C

  • 第14题：

    1. public interface A {  2. public void doSomething（String thing）；  3. }  1. public class AImpl implements A {  2. public void doSomething（String msg） { }  3. }  1. public class B {  2. public A doit（） {  3. // more code here  4. }  5.  6. public String execute（） { 7. // more code here  8. }  9. }  1. public class C extends B {  2. public AImpl doit（） {  3. // more code here  4. }  5.  6. public Object execute（） {  7. // more code here  8. }  9. }  Which statement is true about the classes and interfaces in the exhibit？（） 

    • A、 Compilation will succeed for all classes and interfaces.
    • B、 Compilation of class C will fail because of an error in line 2.
    • C、 Compilation of class C will fail because of an error in line 6.
    • D、 Compilation of class AImpl will fail because of an error in line 2.

    正确答案:C

  • 第15题：

    1. public class a {  2. public void method1（） {  3. try {  4. B b=new b（）；  5. b.method2（）；  6. // more code here  7. } catch （TestException te） {  8. throw new RuntimeException（te）；  9. }  10. }  11. }  1. public class b {  2. public void method2（） throws TestException {  3. // more code here  4. }  5. }  1. public class TestException extends Exception {  2. }  Given：  31. public void method（） {  32. A a=new a（）；  33. a.method1（）；  34. }  Which is true if a TestException is thrown on line 3 of class b？（）

    • A、 Line 33 must be called within a try block.
    • B、 The exception thrown by method1 in class a is not required to be caught.
    • C、 The method declared on line 31 must be declared to throw a RuntimeException.
    • D、 On line 5 of class a， the call to method2 of class b does not need to be placed in a try/catch block.

    正确答案:B

  • 第16题：

    现自：  1．  interface Color {  }      2. interface Weight  {  }      3．  //insert code here    和以下足六个声明：  class Boat extends Color， extends Weight  {  }     class Boat extends Color and Weight  {  }      class Boat extends Color， Weight  {  }  class Boat implements Color，  implements Weight  {  }     class Boat implements Color and Weight  {  }      class Boat implements Color， Weight  {  }    分别插入到第3行，有多少行可以编译？ （） 

    • A、  0
    • B、  1
    • C、  2
    • D、  3

    正确答案:B

  • 第17题：

    多选题
    Which two statements about forwarding equivalence class （FEC） are true？（）
    A

    FEC might correspond to a destination IP subnet， but it might also correspond to any traffic class that the edge LSR considers significant.

    B

    FEC is a group of IP packets that is forwarded over a different path， but with the same forwarding treatment.

    C

    FEC is a group of IP packets that is forwarded over the same path， and with the same forwarding treatment.

    D

    FEC is a group of IP packets that is forwarded over a different path， but with the different forwarding treatment.

    E

    FEC is a group of IP packets that is forwarded over the same path， but with a different forwarding treatment


    正确答案： E,D
    解析： 暂无解析

  • 第18题：

    单选题
    For specific reason, the Owner may transfer the classification member of the vessel to another classification member which is covered by the IACS ‘Transfer of Class Agreement’. Which of the requirements listed below is disobey the IACS “Transfer of Class Agreement?（）
    A

    For all ships between 5 to 10 years of age a representative number of ballast spaces are to be examined.

    B

    For all ships between 10 to 20 years of age a representative number of cargo spaces are to be examined.

    C

    For all ships 15 years of age and over all overdue surveys and conditions of class completed by the gaining class society before the transfer of class can take place. 

    D

    For all ships which are 20 years of age and above or ships subject to ESP which are 15 years of age and above, a full Special Survey or Intermediate Survey, including docking, will be carried out.


    正确答案： C
    解析： 暂无解析

  • 第19题：

    单选题
    Glenna had three boxes of pencils, each of which contained y pencils. She distributed these pencils by giving one to each student in her class, and had 9 pencils left over. If there are 21 students in Glenna’s class, what is y?
    A

    3

    B

    4

    C

    6

    D

    8

    E

    10


    正确答案： E
    解析：
    如果Glenna给班里21人每个人一个铅笔，有9个剩下，可知共有30知铅笔，一共有三盒铅笔，所以每个盒子有30 ÷ 3 =10个铅笔。

  • 第20题：

    单选题
    现有：  1.class Over  {  2.int dolt （long x）  {  return 3；  }      3.  }      4．  5. class Under extends Over  {      6．／／insert code here      7．  }  和四个方法：  short dolt （int y）  {  return 4；  }  int dolt（long Xr long y）  {  return 4；  }      private int dolt（short y）  {  return 4；  }     protected int dolt （long x）  {  return 4；  }      分别插入到第6行，有几个可以通过编译？（）
    A

      1

    B

      2

    C

      3

    D

      4


    正确答案： A
    解析： 暂无解析

  • 第21题：

    多选题
    1. public class OuterClass {  2. private double d1 = 1.0；  3. // insert code here  4. }  Which two are valid if inserted at line 3？（）
    A

    static class InnerOne { public double methoda（） { return d1； } }

    B

    static class InnerOne { static double methoda（） { return d1； } }

    C

    private class InnerOne { public double methoda（） { return d1； } }

    D

    protected class InnerOne { static double methoda（） { return d1； } }

    E

    public abstract class InnerOne { public abstract double methoda（）； }


    正确答案： C,A
    解析： 暂无解析

  • 第22题：

    单选题
    1. public class A {  2. void A（） {  3. System.out.println（“Class A”）；  4. }  5. public static void main（String[] args） {  6. new A（）；  7. }  8. }  What is the result？（）
    A

     Class A

    B

     Compilation fails.

    C

     An exception is thrown at line 2.

    D

     An exception is thrown at line 6.

    E

     The code executes with no output.


    正确答案： E
    解析： 暂无解析

  • 第23题：

    单选题
    In a class of 160 seniors, the ratio of boys to girls is 3 to 5. In the junior class, the ratio of boys to girls is 3 to 2. When the two classes are combined, the ratio of boys to girls is 1 to 1. How many students are in the junior class?
    A

    400

    B

    360

    C

    200

    D

    180

    E

    160


    正确答案： C
    解析：
    因为这个班共有160人，男生和女生的比例为3:5，所以男生和女生的人数分别为(3/8) ×160 = 60人，(5/8) ×160 = 100人。假设另一班男生女生人数共有x人，那么男生女生的人数分别为(3/5)x，(2/5)x，又因为当两班的人数相加后，男生女生的比例相等，所以可得出60 + (3/5)x = 100 + (2/5)x，经计算，x = 200。

  • 第24题：

    单选题
    Given a class Repetition：  1. package utils；  2.  3. public class Repetition {  4. public static String twice（String s） { return s + s； }  5. }  and given another class Demo：  1. // insert code here 2.  3. public class Demo {  4. public static void main（String[] args） {  5. System.out.println（twice（”pizza”））；  6. }  7. }  Which code should be inserted at line 1 of Demo.java to compile and run Demo to print“pizzapizza”？（）
    A

     import utils.*；

    B

     static import utils.*；

    C

     import utils.Repetition.*；

    D

     static import utils.Repetition. *；

    E

     import utils.Repetition.twice（）；

    F

     import static utils.Repetition.twice；

    G

     static import utils.Repetition.twice；


    正确答案： B
    解析： 暂无解析

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