单选题Click the Exhibit button. Which statement is true about the classes and interfaces in the exhibit?()ACompilation will succeed for all classes and interfaces.BCompilation of class C will fail because of an error in line 2.CCompilation of class C will f

题目
单选题
Click the Exhibit button. 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.


相似考题
更多“单选题Click the Exhibit button. 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 ”相关问题
  • 第1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2题:

    1. class SuperClass {  2. public a geta() {  3. return new a();  4. }  5. }  6. class SubClass extends SuperClass {  7. public b geta() {  8. return new b();  9. }  10. }  Which is true?() 

    • A、 Compilation will succeed if a extends b.
    • B、 Compilation will succeed if b extends a.
    • C、 Compilation will always fail because of an error in line 7.
    • D、 Compilation will always fail because of an error in line 8.

    正确答案:B

  • 第3题:

    public class X {  public static void main (String[] args)  {  byte b = 127;  byte c = 126;  byte d = b + c;  }  }   Which statement is true?()  

    • A、 Compilation succeeds and d takes the value 253.
    • B、 Line 5 contains an error that prevents compilation.
    • C、 Line 5 throws an exception indicating “Out of range”
    • D、 Line 3 and 4 contain error that prevent compilation.
    • E、 The compilation succeeds and d takes the value of 1.

    正确答案:B

  • 第4题:

    class A {   public int getNumber(int a) {   return a + 1;   }   }    class B extends A {   public int getNumber (int a) {   return a + 2   }    public static void main (String args) {   A a = new B();   System.out.printIn(a.getNumber(0));   }   }   What is the result? () 

    • A、 Compilation succeeds and 1 is printed.
    • B、 Compilation succeeds and 2 is printed.
    • C、 An error at line 8 causes compilation to fail.
    • D、 An error at line 13 causes compilation to fail.
    • E、 An error at line 14 causes compilation to fail.

    正确答案:B

  • 第5题:

    单选题
    public class Test {   public static void main (String args) {   class Foo {   public int i = 3;  }   Object o = (Object) new Foo();   Foo foo = (Foo)o;   System.out.printIn(foo. i);  }   }   What is the result?()
    A

     Compilation will fail.

    B

     Compilation will succeed and the program will print “3”

    C

     Compilation will succeed but the program will throw a ClassCastException at line 6.

    D

     Compilation will succeed but the program will throw a ClassCastException at line 7.


    正确答案: D
    解析: 暂无解析

  • 第6题:

    单选题
    interface foo {   int k = 0;   }    public class test implements Foo (   public static void main(String args) (    int i;   Test test = new test ();   i= test.k;   i= Test.k;   i= Foo.k;   )   )   What is the result? ()
    A

     Compilation succeeds.

    B

     An error at line 2 causes compilation to fail.

    C

     An error at line 9 causes compilation to fail.

    D

     An error at line 10 causes compilation to fail.

    E

     An error at line 11 causes compilation to fail.


    正确答案: D
    解析: 暂无解析

  • 第7题:

    单选题
    abstract class abstrctIt {  abstract float getFloat ();  } public class AbstractTest extends AbstractIt { private float f1= 1.0f;  private float getFloat () {return f1;}  }   What is the result?()
    A

     Compilation is successful.

    B

     An error on line 6 causes a runtime failure.

    C

     An error at line 6 causes compilation to fail.

    D

     An error at line 2 causes compilation to fail.


    正确答案: C
    解析: 暂无解析

  • 第8题:

    单选题
    Click the Exhibit button. Given this code from Class B: 25.A a1 = new A(); 26.A a2 = new A(); 27.A a3 = new A(); 28.System.out.println(A.getInstanceCount()); What is the result?()
    A

    Compilation of class A fails.

    B

    Line 28 prints the value 3 to System.out.

    C

    Line 28 prints the value 1 to System.out.

    D

    A runtime error occurs when line 25 executes.

    E

    Compilation fails because of an error on line 28.


    正确答案: D
    解析: 暂无解析

  • 第9题:

    单选题
    Click the Exhibit button. What is the result?()
    A

    Line 26 prints "a" to System.out.

    B

    Line 26 prints "b" to System.out.

    C

    An exception is thrown at line 26 at runtime.

    D

    Compilation of class A will fail due to an error in line 6.


    正确答案: C
    解析: 暂无解析

  • 第10题:

    单选题
    package foo;  import java.util.Vector; private class MyVector extends Vector {  int i = 1;  public MyVector() {  i = 2; } }  public class MyNewVector extends MyVector {  public MyNewVector() {  i = 4;  }  public static void main(String args[]) {  MyVector v = new MyNewVector();  }  }  What is the result?()
    A

     Compilation succeeds.

    B

     Compilation fails because of an error at line 5.

    C

     Compilation fails because of an error at line 6.

    D

     Compilation fails because of an error at line 14.

    E

     Compilation fails because of an error at line 17.


    正确答案: C
    解析: 暂无解析

  • 第11题:

    单选题
    class A {   public int getNumber(int a) {   return a + 1;   }   }    class B extends A {   public int getNumber (int a) {   return a + 2   }    public static void main (String args) {   A a = new B();   System.out.printIn(a.getNumber(0));   }   }   What is the result? ()
    A

     Compilation succeeds and 1 is printed.

    B

     Compilation succeeds and 2 is printed.

    C

     An error at line 8 causes compilation to fail.

    D

     An error at line 13 causes compilation to fail.

    E

     An error at line 14 causes compilation to fail.


    正确答案: C
    解析: 暂无解析

  • 第12题:

    单选题
    package foo;   import java.util.Vector;   private class MyVector extends Vector {  int i = 1;   public MyVector() {   i = 2;  }   }   public class MyNewVector extends MyVector {   public MyNewVector () {   i = 4;   }   public static void main (String args ) {    MyVector v = new MyNewVector();   }   }   The file MyNewVector.java is shown in the exhibit.  What is the result?()
    A

     Compilation will succeed.

    B

     Compilation will fail at line 5.

    C

     Compilation will fail at line 6.

    D

     Compilation will fail at line 14.

    E

     Compilation will fail at line 17.


    正确答案: E
    解析: 暂无解析

  • 第13题:

    abstract class abstrctIt {   abstract float getFloat ();   }   public class AbstractTest extends AbstractIt {   private float f1= 1.0f;   private float getFloat () {return f1;}   }   What is the result? ()

    • A、 Compilation is successful.
    • B、 An error on line 6 causes a runtime failure.
    • C、 An error at line 6 causes compilation to fail.
    • D、 An error at line 2 causes compilation to fail.

    正确答案:C

  • 第14题:

    package foo;  import java.util.Vector; private class MyVector extends Vector {  int i = 1;  public MyVector() {  i = 2; } }  public class MyNewVector extends MyVector {  public MyNewVector() {  i = 4;  }  public static void main(String args[]) {  MyVector v = new MyNewVector();  }  }  What is the result?()

    • A、 Compilation succeeds.
    • B、 Compilation fails because of an error at line 5.
    • C、 Compilation fails because of an error at line 6.
    • D、 Compilation fails because of an error at line 14.
    • E、 Compilation fails because of an error at line 17.

    正确答案:B

  • 第15题:

    package foo;   import java.util.Vector;   private class MyVector extends Vector {  int i = 1;   public MyVector() {   i = 2;  }   }   public class MyNewVector extends MyVector {   public MyNewVector () {   i = 4;   }   public static void main (String args ) {    MyVector v = new MyNewVector();   }   }   The file MyNewVector.java is shown in the exhibit.  What is the result?()

    • A、 Compilation will succeed.
    • B、 Compilation will fail at line 5.
    • C、 Compilation will fail at line 6.
    • D、 Compilation will fail at line 14.
    • E、 Compilation will fail at line 17.

    正确答案:B

  • 第16题:

    interface foo {   int k = 0;   }    public class test implements Foo (   public static void main(String args) (    int i;   Test test = new test ();   i= test.k;   i= Test.k;   i= Foo.k;   )   )   What is the result? ()

    • A、 Compilation succeeds.
    • B、 An error at line 2 causes compilation to fail.
    • C、 An error at line 9 causes compilation to fail.
    • D、 An error at line 10 causes compilation to fail.
    • E、 An error at line 11 causes compilation to fail.

    正确答案:A

  • 第17题:

    单选题
    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: A
    解析: 暂无解析

  • 第18题:

    单选题
    Click the Exhibit button. 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: B
    解析: 暂无解析

  • 第19题:

    单选题
    1. class SuperClass {  2. public a geta() {  3. return new a();  4. }  5. }  6. class SubClass extends SuperClass {  7. public b geta() {  8. return new b();  9. }  10. }  Which is true?()
    A

     Compilation will succeed if a extends b.

    B

     Compilation will succeed if b extends a.

    C

     Compilation will always fail because of an error in line 7.

    D

     Compilation will always fail because of an error in line 8.


    正确答案: C
    解析: 暂无解析

  • 第20题:

    单选题
    Click the Exhibit button.   Given this code from Class B:   25. A a1 = new A();   26. A a2 = new A();   27. A a3 = new A();   28. System.out.println(A.getInstanceCount());   What is the result?()
    A

     Compilation of class A fails.

    B

     Line 28 prints the value 3 to System.out.

    C

     Line 28 prints the value 1 to System.out.

    D

     Compilation fails because of an error on line 28.

    E

     A runtime error occurs when line 25 executes.


    正确答案: E
    解析: 暂无解析

  • 第21题:

    单选题
    public class X {   public static void main (String args) {   byte b = 127;   byte c = 126;   byte d = b + c;   }   }   Which statement is true?()
    A

     Compilation succeeds and d takes the value 253.

    B

     Line 5 contains an error that prevents compilation.

    C

     Line 5 throws an exception indicating “Out of range”

    D

     Line 3 and 4 contain error that prevent compilation.

    E

     The compilation succeeds and d takes the value of 1.


    正确答案: D
    解析: 暂无解析

  • 第22题:

    单选题
    Click the Exhibit button. What is the result?()
    A

    Compilation of class A fails.

    B

    Line 28 prints the value 3 to System.out.

    C

    Line 28 prints the value 1 to System.out.

    D

    A runtime error occurs when line 25 executes.

    E

    Compilation fails because of an error on line 28.


    正确答案: D
    解析: 暂无解析

  • 第23题:

    单选题
    public class SomeException {  } Class a:  public class a {  public void doSomething() { }  } Class b:  public class b extends a {  public void doSomething() throws SomeException { }  }  Which is true about the two classes?()
    A

     Compilation of both classes will fail.

    B

     Compilation of both classes will succeed.

    C

     Compilation of class a will fail. Compilation of class b will succeed.

    D

     Compilation of class a will fail. Compilation of class a will succeed.


    正确答案: A
    解析: 暂无解析

  • 第24题:

    单选题
    class A {   public String toString () {   return “4”;   }   }   class B extends A {   8. public String toString () {   return super.toString() + “3”;   }   }   public class Test {   public static void main(Stringargs) {   System.out.printIn(new B());   }   }   What is the result?()
    A

     Compilation succeeds and 4 is printed.

    B

     Compilation succeeds and 43 is printed.

    C

     An error on line 9 causes compilation to fail.

    D

     An error on line 14 causes compilation to fail.

    E

     Compilation succeeds but an exception is thrown at line 9.


    正确答案: B
    解析: 暂无解析