Exception
A Exception
A Exception B
A B Exception
Compilation fails because of an error in line 14.
Compilation fails because of an error in line 19.
第1题:
11. public class Test { 12. public void foo() { 13. assert false; 14. assert false; 15. } 16. public void bar(){ 17. while(true){ 18. assert false; 19. } 20. assert false; 21. } 22. } What causes compilation to fail?()
第2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?()
第3题:
public class X { public static void main(String [] args) { try { badMethod(); System.out.print(“A”); } catch (RuntimeException ex) { System.out.print(“B”); } catch (Exception ex1) { System.out.print(“C”); } finally { System.out.print(“D”); } System.out.print(“E”); } public static void badMethod() { throw new RuntimeException(); } } What is the result?()
第4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?()
第5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?()
第6题:
BD
BCD
BDE
BCDE
ABCDE
Compilation fails.
第7题:
test end
Compilation fails.
test runtime end
test exception end
A Throwable is thrown by main at runtime.
第8题:
Exception
A Exception
A Exception B
A B Exception
Compilation fails because of an error in line 14.
Compilation fails because of an error in line 19.
第9题:
AB
BC
ABC
BCD
Compilation fails.
第10题:
Exception
a,b,Exception
Compilation fails because of an error in line 20.
Compilation fails because of an error in line 14.
A NullPointerException is thrown at runtime.
第11题:
Line 13
Line 14
Line 18
Line 20
第12题:
Pet Pet Pet
Cat Cat Cat
Cat Dog Pet
Cat Dog Dog
第13题:
What is wrong with the following code?() class MyException extends Exception {} public class Qb4ab { public void foo() { try { bar(); } finally { baz(); } catch (MyException e) {} } public void bar() throws MyException { throw new MyException(); } public void baz() throws RuntimeException { throw new RuntimeException(); } }
第14题:
public class Pet{ public void speak(){ System.out.print(“ Pet ”); } } public class Cat extends Pet{ public void speak(){ System.out.print(“ Cat ”); } } public class Dog extends Pet{ public void speak(){ System.out.print(“ Dog ”); } } 执行代码 Pet[] p = {new Cat(),new Dog(),new Pet()}; for(int i=0;i〈p.length;i++) p[i].speak(); 后输出的内容是哪项?()
第15题:
public class X { public static void main(String [] args) { try { badMethod(); System.out.print(“A”); } catch (Exception ex) { System.out.print(“B”); } finally { System.out.print(“C”); } System.out.print(“D”); } public static void badMethod() { throw new RuntimeException(); } } What is the result? ()
第16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?()
第17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? ()
第18题:
B
The code runs with no output.
An exception is thrown at runtime.
Compilation fails because of an error in line 15.
Compilation fails because of an error in line 18.
Compilation fails because of an error in line 19.
第19题:
Since the method foo() does not catch the exception generated by the method baz(), it must declare the RuntimeException in its throws clause.
A try block cannot be followed by both a catch and a finally block.
An empty catch block is not allowed.
A catch block cannot follow a finally block.
A finally block must always follow one or more catch blocks.
第20题:
Compilation fails because of an error in line 19.
An exception is thrown at runtime.
B
Compilation fails because of an error in line 18.
Compilation fails because of an error in line 15.
The code runs with no output.
第21题:
B
The code runs with no output.
Compilation fails because of an error in line 12.
Compilation fails because of an error in line 15.
Compilation fails because of an error in line 18.
第22题:
Foo { public int bar() { return 1; } }
new Foo { public int bar() { return 1; } }
newFoo() { public int bar(){return 1; } }
new class Foo { public int bar() { return 1; } }
第23题:
i2 == startingI returns true.
i2 == startingI returns false.
i2.equals(startingI) returns true.
i2.equals(startingI) returns false.
第24题:
go in Goban go in Sente go in Sente
go in Sente go in Sente go in Goban
go in Sente go in Goban go in Goban
go in Goban go in Goban go in Sente
Compilation fails because of an error in line 17.