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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.
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更多 “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.” 相关考题
考题
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
考题
Click the Exhibit button. Given: ClassA a = new ClassA(); a.methodA(); What is the result? ()
A.Compilation fails.B.ClassC is displayed.C.The code runs with no output.D.An exception is thrown at runtime.
考题
Click the Exhibit button.Given: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.
考题
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.
考题
public class Threads3 implements Runnable { public void run（） { System.out.print（”running”）； } public static void main（String[] args） { Thread t = new Thread（new Threads3（））； t.run（）； t.run（）； t.start（）； } } What is the result？（） A、 Compilation fails.B、 An exception is thrown at runtime.C、 The code executes and prints “running”.D、 The code executes and prints “runningrunning”.E、 The code executes and prints “runningrunningrunning”.
考题
public class Threads5 { public static void main （String[] args） { new Thread（new Runnable（） { public void run（） { System.out.print（”bar”）； } }）.start（）； } } What is the result？（） A、 Compilation fails.B、 An exception is thrown at runtime.C、 The code executes normally and prints “bar”.D、 The code executes normally， but nothing prints.
考题
public class TestOne implements Runnable { public static void main （String[] args） throws Exception { Thread t = new Thread（new TestOne（））； t.start（）； System.out.print（”Started”）； t.join（）； System.out.print（”Complete”）； } public void run（） { for （int i= 0； i 4； i++） { System.out.print（i）； } } } What can be a result？（）A、 Compilation fails.B、 An exception is thrown at runtime.C、 The code executes and prints “StartedComplete”.D、 The code executes and prints “StartedComplete0123”.E、 The code executes and prints “Started0l23Complete”.
考题
public class test { public static void add3 （Integer i）{ int val = i.intValue （ ）； val += 3； i = new Integer （val）； } public static void main （String args [ ] ） { Integer i = new Integer （0）； add3 （i）； system.out.printIn （i.intValue （ ） ）； } } What is the result？（）A、 Compilation will fail.B、 The program prints “0”.C、 The program prints “3”.D、 Compilation will succeed but an exception will be thrown at line 3.
考题
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.
考题
public class Threads4 { public static void main （String[] args） { new Threads4（）.go（）； } public void go（） { Runnable r = new Runnable（） { public void run（） { System.out.print（”foo”）； } }； Thread t = new Thread（r）； t.start（）； t.start（）； } } What is the result？（） A、 Compilation fails.B、 An exception is thrown at runtime.C、 The code executes normally and prints „foo”.D、 The code executes normally， but nothing is printed.
考题
Given： 11. static class A { 12. void process（） throws Exception { throw new Exception（）； } 13. } 14. static class B extends A { 15. void process（） { System.out.println（"B "）； } 16. } 17. public static void main（String[] args） { 18. A a = new B（）； 19. a.process（）； 20. } What is the result？ （）A、 Compilation fails because of an error in line 19.B、 An exception is thrown at runtime.C、 BD、 Compilation fails because of an error in line 18.E、 Compilation fails because of an error in line 15. F、 The code runs with no output.
考题
单选题public class Threads3 implements Runnable { public void run（） { System.out.print（”running”）； } public static void main（String[] args） { Thread t = new Thread（new Threads3（））； t.run（）； t.run（）； t.start（）； } } What is the result？（）A
Compilation fails.B
An exception is thrown at runtime.C
The code executes and prints “running”.D
The code executes and prints “runningrunning”.E
The code executes and prints “runningrunningrunning”.
考题
单选题Click the Exhibit button. Given: ClassA a = new ClassA（ ）; a.methodA（ ）; What is the result? （）A
Compilation fails.B
ClassC is displayed.C
The code runs with no output.D
An exception is thrown at runtime.
考题
单选题Given: What is the result？（）A
Compilation fails.B
An exception is thrown at runtime.C
The code executes and prints "running".D
The code executes and prints "runningrunning".E
The code executes and prints "runningrunningrunning".
考题
单选题public class TestOne implements Runnable { public static void main （String[] args） throws Exception { Thread t = new Thread（new TestOne（））； t.start（）； System.out.print（”Started”）； t.join（）； System.out.print（”Complete”）； } public void run（） { for （int i= 0； i 4； i++） { System.out.print（i）； } } } What can be a result？（）A
Compilation fails.B
An exception is thrown at runtime.C
The code executes and prints “StartedComplete”.D
The code executes and prints “StartedComplete0123”.E
The code executes and prints “Started0l23Complete”.
考题
单选题public class Threads4 { public static void main （String[] args） { new Threads4（）.go（）； } public void go（） { Runnable r = new Runnable（） { public void run（） { System.out.print（”foo”）； } }； Thread t = new Thread（r）； t.start（）； t.start（）； } } What is the result？（）A
Compilation fails.B
An exception is thrown at runtime.C
The code executes normally and prints „foo”.D
The code executes normally， but nothing is printed.
考题
单选题Given： Which code， inserted at line 15， creates an instance of the Point class defined in Line？（）A
Line l = new Line（） ； l.Point p = new l.Point（）；B
Line.Point p = new Line.Point（）；C
The Point class cannot be instatiated at line 15.D
Point p = new Point（）；
考题
单选题Click the Exhibit button. Given： ClassA a = new ClassA（）； a.methodA（）； What is the result？（）A
The code runs with no output.B
Compilation fails.C
An exception is thrown at runtime.D
ClassC is displayed.
考题
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.
考题
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.
考题
单选题public class Threads5 { public static void main （String[] args） { new Thread（new Runnable（） { public void run（） { System.out.print（”bar”）； } }）.start（）； } } What is the result？（）A
Compilation fails.B
An exception is thrown at runtime.C
The code executes normally and prints “bar”.D
The code executes normally， but nothing prints.
考题
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.
考题
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.
考题
单选题Given: What is the result?（）A
Compilation fails.B
exception is thrown at runtime.C
The attribute id in the ItemTest object remains unchanged.D
The attribute id in the ItemTest object is modified to the new value.E
A new ItemTest object is created with the preferred value in the id attribute.
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 code on line 5 of class B will execute.EThe exception will be propagated back to line 27.
考题
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.
考题
单选题public class test { public static void add3 （Integer i） int val = i.intValue （ ）； val += 3； i = new Integer （val）； } public static void main （String args [ ] ） { Integer i = new Integer （0）； add3 （i）； system.out.printIn （i.intValue （ ） ）； } What is the result？（）A
Compilation will fail.B
The program prints “0”.C
The program prints “3”.D
Compilation will succeed but an exception will be thrown at line 3.
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