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单选题
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

 B

D

 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.


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更多 “单选题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.” 相关考题
考题 interface A{int x = 0;}class B{int x =1;}class C extends B implements A {public void pX(){System.out.println(x);}public static void main(String[] args) {new C().pX();}}

考题 class TestA {  public void start() { System.out.println(”TestA”); }  }  public class TestB extends TestA {  public void start() { System.out.println(”TestB”); } public static void main(String[] args) {  ((TestA)new TestB()).start();  }  }  What is the result?() A、 TestAB、 TestBC、 Compilation fails.D、 An exception is thrown at runtime.

考题 11. public static void main(String[] args) {  12. Object obj = new Object() {  13. public int hashCode() {  14. returns 42; 15. }  16. };  17. System.out.println(obj.hashCode());  18. }    What is the result? () A、 42B、 An exception is thrown at runtime.C、 Compilation fails because of an error on line 12.D、 Compilation fails because of an error on line 16.E、 Compilation fails because of an error on line 17.

考题 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. new B().process();  19. }  What is the result?() A、 BB、 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.

考题 public class Test {  public static void aMethod() throws Exception {  try {  throw new Exception(); } finally {  System.out.println(“finally”);  }  }  public static void main(String args[]) {  try {  aMethod();  } catch (Exception e) {  System.out.println(“exception”);  }  System.out.println(“finished”);  }  }  What is the result?()  A、 finallyB、 exception finishedC、 finally exception finishedD、 Compilation fails.

考题 11. class Converter {  12. public static void main(String[] args) {  13. Integer i = args[0];  14. int j = 12;  15. System.out.println(”It is “ + (j==i) + “that j==i.”);  16. }  17. }  What is the result when the programmer attempts to compile the code and run it with the command java Converter 12?() A、 It is true that j==i.B、 It is false that j==i.C、 An exception is thrown at runtime.D、 Compilation fails because of an error in line 13.

考题 1. public class Test { 2. public static String output =””; 3.  4. public static void foo(int i) { 5. try { 6. if(i==1) { 7. throw new Exception(); 8. } 9. output += “1”; 10. } 11. catch(Exception e) { 12. output += “2”; 13. return; 14. } 15. finally { 16. output += “3”;17. } 18. output += “4”; 19. } 20.  21. public static void main(String args[]) { 22. foo(0); 23. foo(1); 24.  25. }26. } What is the value of the variable output at line 23?()

考题 11.classA {  12. public void process() { System.out.print(”A “); } }  13. class B extends A {  14. public void process() throws RuntimeException {  15. super.process();  16. if (true) throw new RuntimeException();  17. System.out.print(“B”); }}  18. public static void main(String[] args) {  19. try { ((A)new B()).process(); }  20. catch (Exception e) { System.out.print(”Exception “); }  21. }  What is the result?() A、 ExceptionB、 A ExceptionC、 A Exception BD、 A B ExceptionE、 Compilation fails because of an error in line 14.F、 Compilation fails because of an error in line 19.

考题 11. class Person {  12. String name = “No name‟;  13. public Person(String nm) { name = nm; }  14. }  15.  16. class Employee extends Person {  17. String emplD = “0000”;  18. public Employee(String id) { empID = id; }  19. }  20.  21. public class EmployeeTest {  22. public static void main(String[] args) {  23. Employee e = new Employee(”4321”);  24. System.out.println(e.empID);  25. }  26. }  What is the result?() A、 4321B、 0000C、 An exception is thrown at runtime.D、 Compilation fails because of an error in line 18.

考题 public class Starter extends Thread {  private int x= 2;  public static void main(String[] args) throws Exception {  new Starter().makeItSo();  }  public Starter() {  x=5;  start();  }  public void makeItSo() throws Exception {  join();  x=x- 1;  System.out.println(x);  }  public void run() { x *= 2; }  }  What is the output if the main() method is rum?() A、 4B、 5C、 8D、 9E、 Compilation fails.F、 An exception is thrown at runtime.G、 It is impossible to determine for certain.

考题 10. interface Foo {}  11. class Alpha implements Foo {}  12. class Beta extends Alpha {}  13. class Delta extends Beta {  14. public static void main( String[] args) {  15. Beta x = new Beta();  16. // insert code here  17. }  18. }  Which code, inserted at line 16, will cause a java.lang.ClassCastException?() A、 Alpha a = x;B、 Foo f= (Delta)x;C、 Foo f= (Alpha)x;D、 Beta b = (Beta)(Alpha)x;

考题 11. public static void append(List list) { list.add(”0042”); }  12. public static void main(String[] args) {  13. List intList = new ArrayList();  14. append(intList);  15. System.out.println(intList.get(0));  16. }  What is the result?() A、 42B、 0042C、 An exception is thrown at runtime.D、 Compilation fails because of an error in line 13.E、 Compilation fails because of an error in line 14.

考题 11.classa {  12. public void process() { System.out.print(”a,”); } }  13. class b extends a {  14. public void process() throws IOException {  15. super.process();  16. System.out.print(”b,”);  17. throw new IOException();  18. } }  19. public static void main(String[] args) {  20. try { new b().process(); }  21. catch (IOException e) { System.out.println(”Exception”); } }  What is the result?() A、 ExceptionB、 a,b,ExceptionC、 Compilation fails because of an error in line 20.D、 Compilation fails because of an error in line 14.E、 A NullPointerException is thrown at runtime.

考题 11. static classA {  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、 BB、 The code runs with no output.C、 An exception is thrown at runtime.D、 Compilation fails because of an error in line 15.E、 Compilation fails because of an error in line 18.F、 Compilation fails because of an error in line 19.

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11. static classA {  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  BB  The code runs with no output.C  An exception is thrown at runtime.D  Compilation fails because of an error in line 15.E  Compilation fails because of an error in line 18.F  Compilation fails because of an error in line 19.

考题 单选题11. public static void append(List list) { list.add(”0042”); }  12. public static void main(String[] args) {  13. List intList = new ArrayList();  14. append(intList);  15. System.out.println(intList.get(0));  16. }  What is the result?()A  42B  0042C  An exception is thrown at runtime.D  Compilation fails because of an error in line 13.E  Compilation fails because of an error in line 14.

考题 单选题10. interface Foo {}  11. class Alpha implements Foo {}  12. class Beta extends Alpha {}  13. class Delta extends Beta {  14. public static void main( String[] args) {  15. Beta x = new Beta();  16. // insert code here  17. }  18. }  Which code, inserted at line 16, will cause a java.lang.ClassCastException?()A  Alpha a = x;B  Foo f= (Delta)x;C  Foo f= (Alpha)x;D  Beta b = (Beta)(Alpha)x;

考题 单选题11. class Person {  12. String name = “No name‟;  13. public Person(String nm) { name = nm; }  14. }  15.  16. class Employee extends Person {  17. String emplD = “0000”;  18. public Employee(String id) { empID = id; }  19. }  20.  21. public class EmployeeTest {  22. public static void main(String[] args) {  23. Employee e = new Employee(”4321”);  24. System.out.println(e.empID);  25. }  26. }  What is the result?()A  4321B  0000C  An exception is thrown at runtime.D  Compilation fails because of an error in line 18.

考题 单选题11. public static void main(String[] args) {  12. Object obj = new Object() {  13. public int hashCode() {  14. returns 42; 15. }  16. };  17. System.out.println(obj.hashCode());  18. }    What is the result? ()A  42B  An exception is thrown at runtime.C  Compilation fails because of an error on line 12.D  Compilation fails because of an error on line 16.E  Compilation fails because of an error on line 17.

考题 单选题11.classA {  12. public void process() { System.out.print(”A “); } }  13. class B extends A {  14. public void process() throws RuntimeException {  15. super.process();  16. if (true) throw new RuntimeException();  17. System.out.print(“B”); }}  18. public static void main(String[] args) {  19. try { ((A)new B()).process(); }  20. catch (Exception e) { System.out.print(”Exception “); }  21. }  What is the result?()A  ExceptionB  A ExceptionC  A Exception BD  A B ExceptionE  Compilation fails because of an error in line 14.F  Compilation fails because of an error in line 19.

考题 单选题public class Starter extends Thread {  private int x= 2;  public static void main(String[] args) throws Exception {  new Starter().makeItSo();  }  public Starter() {  x=5;  start();  }  public void makeItSo() throws Exception {  join();  x=x- 1;  System.out.println(x);  }  public void run() { x *= 2; }  }  What is the output if the main() method is rum?()A  4B  5C  8D  9E  Compilation fails.F  An exception is thrown at runtime.G  It is impossible to determine for certain.

考题 单选题class TestA {  public void start() { System.out.println(”TestA”); }  }  public class TestB extends TestA {  public void start() { System.out.println(”TestB”); } public static void main(String[] args) {  ((TestA)new TestB()).start();  }  }  What is the result?()A  TestAB  TestBC  Compilation fails.D  An exception is thrown at runtime.

考题 单选题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. new B().process();  19. }  What is the result?()A  BB  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.

考题 单选题public class Test {  public static void aMethod() throws Exception {  try {  throw new Exception(); } finally {  System.out.println(“finally”);  }  }  public static void main(String args[]) {  try {  aMethod();  } catch (Exception e) {  System.out.println(“exception”);  }  System.out.println(“finished”);  }  }  What is the result?()A  finallyB  exception finishedC  finally exception finishedD  Compilation fails.

考题 单选题11.classa {  12. public void process() { System.out.print(”a,”); } }  13. class b extends a {  14. public void process() throws IOException {  15. super.process();  16. System.out.print(”b,”);  17. throw new IOException();  18. } }  19. public static void main(String[] args) {  20. try { new b().process(); }  21. catch (IOException e) { System.out.println(”Exception”); } }  What is the result?()A  ExceptionB  a,b,ExceptionC  Compilation fails because of an error in line 20.D  Compilation fails because of an error in line 14.E  A NullPointerException is thrown at runtime.

考题 单选题11. class Converter {  12. public static void main(String[] args) {  13. Integer i = args[0];  14. int j = 12;  15. System.out.println(”It is “ + (j==i) + “that j==i.”);  16. }  17. }  What is the result when the programmer attempts to compile the code and run it with the command java Converter 12?()A  It is true that j==i.B  It is false that j==i.C  An exception is thrown at runtime.D  Compilation fails because of an error in line 13.