单选题Click the Exhibit button. What is the result?()ACompilation of class A fails.BLine 28 prints the value 3 to System.out.CLine 28 prints the value 1 to System.out.DA runtime error occurs when line 25 executes.ECompilation fails because of an error on li

题目
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.


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更多“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 e”相关问题
  • 第1题:

    1. public class A {  2. public void doit() {  3. }  4. public String doit() {  5. return “a”;  6. }  7. public double doit(int x) {  8. return 1.0;  9. }  10.}  What is the result?() 

    • A、 An exception is thrown at runtime.
    • B、 Compilation fails because of an error in line 7.
    • C、 Compilation fails because of an error in line 4.
    • D、 Compilation succeeds and no runtime errors with class A occur.

    正确答案:C

  • 第2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3题:

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

    • A、 test
    • B、 null
    • C、 An exception is thrown at runtime.
    • D、 Compilation fails because of an error in line 1.
    • E、 Compilation fails because of an error in line 4.
    • F、 Compilation fails because of an error in line 5.

    正确答案:A

  • 第4题:

    1. public class A {  2. public String doit(int x, int y) {  3. return “a”;  4. }  5.  6. public String doit(int... vals) {  7. return “b”;  8. } 9. }  Given:  25. A a=new A();  26. System.out.println(a.doit(4, 5));  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:A

  • 第5题:

    单选题
    Given: What is the result?()
    A

    test

    B

    null

    C

    An exception is thrown at runtime.

    D

    Compilation fails because of an error in line 1.

    E

    Compilation fails because of an error in line 4.

    F

    Compilation fails because of an error in line 5.


    正确答案: B
    解析: 暂无解析

  • 第6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7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8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9题:

    单选题
    1. public class Boxer1 {  2. Integer i;  3. int x;  4. public Boxer1(int y) {  5. x=i+y;  6. System.out.println(x);  7. }  8. public static void main(String[] args) {  9. new Boxer1(new Integer(4));  10. }  11. }  What is the result?()
    A

     The value “4” is printed at the command line.

    B

     Compilation fails because of an error in line 5.

    C

     Compilation fails because of an error in line 9.

    D

     A NullPointerException occurs at runtime.

    E

     A NumberFormatException occurs at runtime.

    F

     An IllegalStateException occurs at runtime.


    正确答案: E
    解析: 暂无解析

  • 第10题:

    单选题
    23. Object [] myObjects = {  24. new integer(12),  25. new String(”foo”),  26. new integer(5),  27. new Boolean(true)  28. };  29. Arrays.sort(myObjects);  30. for( int i=0; i31. System.out.print(myObjects[i].toString());  32. System.out.print(” “);  33. }  What is the result?()
    A

     Compilation fails due to an error in line 23.

    B

     Compilation fails due to an error in line 29.

    C

     A ClassCastException occurs in line 29.

    D

     A ClassCastException occurs in line 31.

    E

     The value of all four objects prints in natural order.


    正确答案: D
    解析: 暂无解析

  • 第11题:

    单选题
    1. public class A {  2.  3. private int counter = 0;  4.  5. public static int getInstanceCount() {  6. return counter;  7. }  8.  9. public A() {  10. counter++;  11. }  12.  13. }  Given this code from Class B:  25.A a1 =new A();  26. A a2 =new A();  27. A a3 =new A();  28. System.out.printIn(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: E
    解析: 暂无解析

  • 第12题:

    单选题
    Given: What is the result?()
    A

    B

    B

    The code runs with no output.

    C

    Compilation fails because of an error in line 12.

    D

    Compilation fails because of an error in line 15.

    E

    Compilation fails because of an error in line 18.


    正确答案: A
    解析: 暂无解析

  • 第13题:

    23. Object [] myObjects = {  24. new integer(12),  25. new String(”foo”),  26. new integer(5),  27. new Boolean(true)  28. };  29. Arrays.sort(myObjects);  30. for( int i=0; i31. System.out.print(myObjects[i].toString());  32. System.out.print(” “);  33. }  What is the result?() 

    • A、 Compilation fails due to an error in line 23.
    • B、 Compilation fails due to an error in line 29.
    • C、 A ClassCastException occurs in line 29.
    • D、 A ClassCastException occurs in line 31.
    • E、 The value of all four objects prints in natural order.

    正确答案:C

  • 第14题:

    1. public class Boxer1 {  2. Integer i;  3. int x;  4. public Boxer1(int y) {  5. x=i+y;  6. System.out.println(x);  7. }  8. public static void main(String[] args) {  9. new Boxer1(new Integer(4));  10. }  11. }  What is the result?() 

    • A、 The value “4” is printed at the command line.
    • B、 Compilation fails because of an error in line 5.
    • C、 Compilation fails because of an error in line 9.
    • D、 A NullPointerException occurs at runtime.
    • E、 A NumberFormatException occurs at runtime.
    • F、 An IllegalStateException occurs at runtime.

    正确答案:D

  • 第15题:

    1. public class A {  2.  3. private int counter = 0;  4.  5. public static int getInstanceCount() {  6. return counter;  7. }  8.  9. public A() {  10. counter++;  11. }  12.  13. }  Given this code from Class B:  25.A a1 =new A();  26. A a2 =new A();  27. A a3 =new A();  28. System.out.printIn(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:A

  • 第16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17题:

    单选题
    Given: What is the result?()
    A

    Compilation fails due to an error in line 23.

    B

    Compilation fails due to an error in line 29.

    C

    A ClassCastException occurs in line 29.

    D

    A ClassCastException occurs in line 31.

    E

    The value of all four objects prints in natural order.


    正确答案: E
    解析: 暂无解析

  • 第18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19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20题:

    单选题
    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: E
    解析: 暂无解析

  • 第21题:

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

     test

    B

     null

    C

     An exception is thrown at runtime.

    D

     Compilation fails because of an error in line 1.

    E

     Compilation fails because of an error in line 4.

    F

     Compilation fails because of an error in line 5.


    正确答案: A
    解析: 暂无解析

  • 第22题:

    单选题
    Given: What is the result when method testIfA is invoked?()
    A

    True

    B

    Not true

    C

    An exception is thrown at runtime.

    D

    Compilation fails because of an error at line 12.

    E

    Compilation fails because of an error at line 19.


    正确答案: B
    解析: 暂无解析

  • 第23题:

    单选题
    Given: What is the result?()
    A

    The code runs with no output.

    B

    An exception is thrown at runtime.

    C

    Compilation fails because of an error in line 20.

    D

    Compilation fails because of an error in line 21.

    E

    Compilation fails because of an error in line 23.

    F

    Compilation fails because of an error in line 25.


    正确答案: F
    解析: 暂无解析

  • 第24题:

    单选题
    What is the result()?
    A

     The program runs and prints “ I = 1 , j = 0”

    B

     The program runs and prints “ I = 1 , j = 4”

    C

     The program runs and prints “ I = 3 , j = 4”

    D

     The program runs and prints “ I = 3 , j = 0”

    E

     An error at line 4 cause compilation to fail.

    F

     An error at line 7 cause compilation to fail.


    正确答案: A
    解析: 暂无解析