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、2B、3C、4D、0E、1
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
相关考题：
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
1． Everyone in our class ________ ．A． like singingB． likes play footballC． like watch TVD． likes playing games
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.
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；
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.
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.
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.
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 AB、 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.
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、 0B、 1C、 2D、 3
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（）；
多选题Which two statements about forwarding equivalence class （FEC） are true？（）AFEC might correspond to a destination IP subnet， but it might also correspond to any traffic class that the edge LSR considers significant.BFEC is a group of IP packets that is forwarded over a different path， but with the same forwarding treatment.CFEC is a group of IP packets that is forwarded over the same path， and with the same forwarding treatment.DFEC is a group of IP packets that is forwarded over a different path， but with the different forwarding treatment.EFEC is a group of IP packets that is forwarded over the same path， but with a different forwarding treatment
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（）？Aprivate void set Var（int a， float c， int b） {}Bprotected void set Var（int a， int b， float c） {}Cpublic int set Var（int a， float c， int b） {return a：}Dpublic int set Var（int a， int b， float c） {return a：}Eprotected float set Var（int a， int b， float c） {return c：}
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?（）AFor all ships between 5 to 10 years of age a representative number of ballast spaces are to be examined.BFor all ships between 10 to 20 years of age a representative number of cargo spaces are to be examined.CFor 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.DFor 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.
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）；
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?A3B4C6D8E10
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？（）A0B1C2D3
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 1B 2C 3D 4
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.
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？（）Astatic class InnerOne { public double methoda（） { return d1； } }Bstatic class InnerOne { static double methoda（） { return d1； } }Cprivate class InnerOne { public double methoda（） { return d1； } }Dprotected class InnerOne { static double methoda（） { return d1； } }Epublic abstract class InnerOne { public abstract double methoda（）； }
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？（）AThe application will crash.BThe code on line 29 will be executed.CThe code on line 5 of class A will execute.DThe code on line 5 of class B will execute.EThe exception will be propagated back to line 27.
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 AB 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.
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？（）A2B3C4D0E1
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?A400B360C200D180E160
单选题—How many girls are there in your class?—_____them ______ over twenty.AA number of; areBThe number of; areCA number of; isDThe number of; is
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；