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单选题
Given the following code： 1） class Parent { 2） private String name； 3） public Parent（）{} 4） } 5） public class Child extends Parent { 6） private String department； 7） public Child（） {} 8） public String getValue（）{ return name； } 9） public static void main（String arg[]） { 10） Parent p = new Parent（）； 11） } 12） } Which line will cause error？（）
A
line 3
B
line 6
C
line 7
D
line 8
E
line 10
参考答案
参考解析
解析：
第8行的getValue()试图访问父类的私有变量，错误。
更多 “单选题Given the following code： 1） class Parent { 2） private String name； 3） public Parent（）{} 4） } 5） public class Child extends Parent { 6） private String department； 7） public Child（） {} 8） public String getValue（）{ return name； } 9） public static void main（String arg[]） { 10） Parent p = new Parent（）； 11） } 12） } Which line will cause error？（）A line 3B line 6C line 7D line 8E line 10” 相关考题
考题
Given:Which three methods, inserted individually at line 14, will correctly complete class Two?()
A.int foo() { /* more code here */ }B.void foo() { /* more code here */ }C.public void foo() { /* more code here */ }D.private void foo() { /* more code here */ }E.protected void foo() { /* more code here */ }
考题
Given:Which two, inserted at line 11, will allow the code to compile?()
A.public class MinMax? {B.public class MinMax? extends Number {C.public class MinMaxN extends Object {D.public class MinMaxN extends Number {E.public class MinMax? extends Object {F.public class MinMaxN extends Integer {
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Given:Which method will complete this class?()
A.public int compareTo(Object o){/*more code here*/}B.public int compareTo(Score other){/*more code here*/}C.public int compare(Score s1,Score s2){/*more code here*/}D.public int compare(Object o1,Object o2){/*more code here*/}
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Click the Exhibit button. Given:Which two statements 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.
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Given:Which code, inserted at line 15, allows the class Sprite to compile?()
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考题
有如下程序: include using namespace std; class PARENT { public: PARENT() { cout
有如下程序：include ＜iostream＞using namespace std;class PARENT{public:PARENT() { cout ＜＜"PARENT"; }};class SON : public PARENT{public:SON() {cout ＜＜ "SON"; }};int main(){SON son;PARENT *p;p = son;return 0;}执行上面程序的输出是______。
考题
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.
考题
Given that Thing is a class， how many objects and reference variables are created by the following code？（） Thing item， stuff； item = new Thing（）； Thing entity = new Thing（）；A、One object is createdB、Two objects are createdC、Three objects are createdD、One reference variable is createdE、Two reference variables are createdF、Three reference variables are created.
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Given the following code fragment： public void create（） { Vector myVect； myVect = new Vector（）； } Which of the following statements are true？（） A、 The declaration on line 2 does not allocate memory space for the variable myVect.B、 The declaration on line 2 allocates memory space for a reference to a Vector object.C、 The statement on line 2 creates an object of class Vector.D、 The statement on line 3 creates an object of class Vector.E、 The statement on line 3 allocates memory space for an object of class Vector.
考题
Given the following code： 1） class Parent { 2） private String name； 3） public Parent（）{} 4） } 5） public class Child extends Parent { 6） private String department； 7） public Child（） {} 8） public String getValue（）{ return name； } 9） public static void main（String arg[]） { 10） Parent p = new Parent（）； 11） } 12） } Which line will cause error？（） A、 line 3B、 line 6C、 line 7D、 line 8E、 line 10
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Given the following code： public class Person{ int arr[] = new int[10]； public static void main（String a[]） { System.out.println（arr[1]）； } } Which statement is correct？（） A、 When compilation some error will occur.B、 It is correct when compilation but will cause error when running.C、 The output is zero.D、 The output is null.
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Given 1. public class Foo { 2. public static void main （String [] args） } 3. try { return；} 4. finally { Syste.out.printIn （“Finally”）；} 5. } 6. } What is the result（ ）？A、 The program runs and prints nothing.B、 The program runs and prints “Finally”.C、 The code comiles. But an exception is thrown at runtime.D、 The code will not compile because the catch block is missing.
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You work as an application developer at Certkiller .com. Certkiller .com has instructed you to create a class named MetricFormula. This class will be used to compare MetricUnit and EnglishUnit objects.The MetricFormula is currently defined as follows （Line numbers are used for reference purposes only）： 1. public class MetricFormula2. { 3. 4. } You need to ensure that the MetricFormula class can be used to compare the required objects. What should you do？ （）A、 Add the following code on line 1： ： IComparable {B、 Add the following code on line 1： ： IComparer {C、 Add the following code on line 3： public int Compare （object x， object y） {// implementation code }D、 Add the following code on line 3： public int CompareTo （object obj） {// implementation code }
考题
多选题Click the Exhibit button. Given： Which two statements 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 exception will be propagated back to line 27.EThe code on line 5 of class B will execute.
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多选题Given： 10. class One { 11. void foo（） { } 12. } 13. class Two extends One { 14. //insert method here 15. } Which three methods， inserted individually at line 14， will correctly complete class Two？（）Apublic void foo（） { /* more code here */ }Bprivate void foo（） { /* more code here */ }Cprotected void foo（） { /* more code here */ }Dint foo（） { /* more code here */ }Evoid foo（） { /* more code here */ }
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多选题Given: Which three methods, inserted individually at line 14, will correctly complete class Two?（）Aint foo() { /* more code here */ }Bvoid foo() { /* more code here */ }Cpublic void foo() { /* more code here */ }Dprivate void foo() { /* more code here */ }Eprotected void foo() { /* more code here */ }
考题
单选题You are creating an ASP.NET Web site. The site has a master page named Custom.master. The code-behind file for Custom.master contains the following code segment.Partial Public Class Custom Inherits System.Web.UI.MasterPagePublic Property Region As String Protected Sub Page_Load（ByVal sender As Object，ByVal e As System.EventArgs） Handles Me.LoadEnd SubEnd Class You create a new ASP.NET page and specify Custom.master as its master page.You add a Label control named lblRegion to the new page. You need to display the value of the master pages Region property in lblRegion.What should you do？ （）A
Add the following code segment to the Page_Load method of the page code-behind file. Dim custom As Custom = Me.Parent lblRegion.Text = custom.RegionB
Add the following code segment to the Page_Load method of the page code-behind file. Dim custom As Custom = Me.Master lblRegion.Text = custom.RegionC
Add the following code segment to the Page_Load method of the Custom.Master.vb code-behind file. Dim lblRegion As Label = Page.FindControl（lblRegion） lblRegion.Text = Me.RegionD
Add the following code segment to the Page_Load method of the Custom.Master.vb code-behind file. Dim lblRegion As Label = Master.FindControl（lblRegion） lblRegion.Text = Me.Region
考题
多选题Given the following class， which statements can be inserted at position 1 without causing the code to fail compilation？（） public class Q6db8 { int a； int b = 0； static int c； public void m（） { int d； int e = 0； // Position 1 } }Aa++；Bb++；Cc++；Dd++；Ee++；
考题
单选题Given the following code： public class Person{ static int arr[] = new int[10]； public static void main（String a[]） { System.out.println（arr[1]；） } } Which statement is correct？（）A
When compilation some error will occur.B
It is correct when compilation but will cause error when running.C
The output is zero.D
The output is null.
考题
填空题Given the following code, write a line of code that, when inserted at the indicated location, will make the overriding method in Extension invoke the overridden method in class Base on the current object. class Base { public void print（ ） { System.out.println("base"); } } class Extention extends Base { public void print（ ） { System.out.println("extension"); // insert line of implementation here } } public class Q294d { public static void main(String args[]) { Extention ext = new Extention（ ）; ext.print（ ）; } } Fill in a single line of implementation.（）
考题
多选题Given that Thing is a class， how many objects and reference variables are created by the following code？（） Thing item， stuff； item = new Thing（）； Thing entity = new Thing（）；AOne object is createdBTwo objects are createdCThree objects are createdDOne reference variable is createdETwo reference variables are createdFThree reference variables are created.
考题
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.
考题
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？（）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.
考题
单选题Given a class Repetition： 1.package utils； 2. 3.public class Repetition{ 4.public static String twice（Strings）{returns+s；} 5.} and given another class Demo： 1.//insert code here2. 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
importutils.Repetition.*；D
static importutils.Repetition.*；E
import utils.Repetition.twice（）；F
import static utils.Repetition.twice；G
static import utils.Repetition.twice；
考题
多选题Given the following code fragment： public void create（） { Vector myVect； myVect = new Vector（）； } Which of the following statements are true？（）AThe declaration on line 2 does not allocate memory space for the variable myVect.BThe declaration on line 2 allocates memory space for a reference to a Vector object.CThe statement on line 2 creates an object of class Vector.DThe statement on line 3 creates an object of class Vector.EThe statement on line 3 allocates memory space for an object of class Vector.
考题
单选题Given the following code： public class Person{ int arr[] = new int[10]； public static void main（String a[]） { System.out.println（arr[1]）； } } Which statement is correct？（）A
When compilation some error will occur.B
It is correct when compilation but will cause error when running.C
The output is zero.D
The output is null.
考题
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；
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