No code is necessary.
throws Exception
catch ( Exception e )
throws RuntimeException
catch ( TestException e)
第1题:
1. public class Test { 2. public static void main (String args) { 3. unsigned byte b = 0; 4. b--; 5. 6. } 7. } What is the value of b at line 5?()
第2题:
1. public class Exception Test { 2. class TestException extends Exception {} 3. public void runTest() throws TestException {} 4. public void test() /* Point X */ { 5. runTest(); 6. } 7. } At Point X on line 4, which code is necessary to make the code compile?()
第3题:
public class ExceptionTest { class TestException extends Exception {} public void runTest () throws TestException {} public void test () /* Point X*/ { runTest (); } } At point X on line 4, which code can be added to make the code compile?()
第4题:
1. class super { 2. public float getNum() {return 3.0f;} 3. } 4. 5. public class Sub extends Super { 6. 7. } Which method, placed at line 6, will cause a compiler error?()
第5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?()
第6题:
Compilation will succeed for all classes and interfaces.
Compilation of class C will fail because of an error in line 2.
Compilation of class C will fail because of an error in line 6.
Compilation of class AImpl will fail because of an error in line 2.
第7题:
No code is necessary.
throws Exception
catch ( Exception e )
throws RuntimeException
catch ( TestException e)
第8题:
Compilation succeeds and 4 is printed.
Compilation succeeds and 43 is printed.
An error on line 9 causes compilation to fail.
An error on line 14 causes compilation to fail.
Compilation succeeds but an exception is thrown at line 9.
第9题:
Value is: 8
Compilation fails.
Value is: 12
Value is: -12
The code runs with no output.
An exception is thrown at runtime.
第10题:
test
null
An exception is thrown at runtime.
Compilation fails because of an error in line 1.
Compilation fails because of an error in line 4.
Compilation fails because of an error in line 5.
第11题:
Throws Exception.
Catch (Exception e).
Throws RuntimeException.
Catch (TestException e).
No code is necessary.
第12题:
Class A
Compilation fails.
An exception is thrown at line 2.
An exception is thrown at line 6.
The code executes with no output.
第13题:
1. public class A { 2. void A() { 3. System.out.println(“Class A”); 4. } 5. public static void main(String[] args) { 6. new A(); 7. } 8. } What is the result?()
第14题:
1. public class A { 2. public void method1() { 3. B b=new B(); 4. b.method2(); 5. // more code here 6. } 7. } 1. public class B { 2. public void method2() { 3.C c=new C(); 4. c.method3(); 5. // more code here 6. } 7. } 1. public class C { 2. public void method3() { 3. // more code here 4. } 5. } Given: 25. try { 26. A a=new A(); 27. a.method1(); 28. } catch (Exception e) { 29. System.out.print(”an error occurred”); 30. } Which two are true if a NullPointerException is thrown on line 3 of class C?()
第15题:
1. class A { 2. public String toString () { 3. return “4”; 4. } 5. } 6. class B extends A { 7. public String toString () { 8. return super.toString() + “3”; 9. } 10. } 11. public class Test { 12. public static void main(String[]args) { 13. System.out.printIn(new B()); 14. } 15. } What is the result?()
第16题:
1. public class Test { 2. int x= 12; 3. public void method(int x) { 4. x+=x; 5. System.out.println(x); 6. } 7. } Given: 34. Test t = new Test(); 35. t.method(5); What is the output from line 5 of the Test class?()
第17题:
1. class Exc0 extends Exception { } 2. class Exc1 extends Exc0 { } 3. public class Test { 4. public static void main(String args[]) { 5. try { 6. throw new Exc1(); 7. } catch (Exc0 e0) { 8. System.out.println(“Ex0 caught”); 9. } catch (Exception e) { 10. System.out.println(“exception caught”); 11. } 12. } 13. } What is the result?()
第18题:
-1
255
127
Compilation will fail.
Compilation will succeed but the program will throw an exception at line 4.
第19题:
5
10
12
17
24
第20题:
Line 33 must be called within a try block.
The exception thrown by method1 in class a is not required to be caught.
The method declared on line 31 must be declared to throw a RuntimeException.
On line 5 of class a, the call to method2 of class b does not need to be placed in a try/catch block.
第21题:
public void getNum(){}
public void getNum(double d){}
public float getNum() { return 4.0f; }
public double getNum(float d) { return 4.0d; }
第22题:
Ex0 caught
exception caught
Compilation fails because of an error at line 2.
Compilation fails because of an error at line 6.
第23题:
An exception is thrown at runtime.
Compilation fails because of an error in line 7.
Compilation fails because of an error in line 4.
Compilation succeeds and no runtime errors with class A occur.
第24题:
Class a will not compile.
Line 46 can throw the unchecked exception TestException.
Line 45 can throw the unchecked exception TestException.
Line 46 will compile if the enclosing method throws a TestException.
Line 46 will compile if enclosed in a try block, where TestException is caught.