class Exc0 extends Exception { }
class Exc1 extends Exc0 { } /* Line 2 */
public class Test
{
public static void main(String args[])
{
try
{
throw new Exc1(); /* Line 9 */
}
catch (Exc0 e0) /* Line 11 */
{
System.out.println("Ex0 caught");
}
catch (Exception e)
{
System.out.println("exception caught");
}
}
}
A -
Ex0 caught
B -
Exception caught
C -
Compilation fails because of an error at line 2.
D -
Compilation fails because of an error at line 9.
2-
import java.io.*;
public class MyProgram
{
public static void main(String args[])
{
FileOutputStream out = null;
try
{
out = new FileOutputStream("test.txt");
out.write(122);
}
catch(IOException io)
{
System.out.println("IO Error.");
}
finally
{
out.close();
}
}
}
and given that all methods of class FileOutputStream, including close(), throw an IOException, which of these is true?
A -
This program will compile successfully.
B -
This program fails to compile due to an error at line 4.
C -
This program fails to compile due to an error at line 6.
D -
This program fails to compile due to an error at line 13.
3-
public class MyProgram
{
public static void throwit()
{
throw new RuntimeException();
}
public static void main(String args[])
{
try
{
System.out.println("Hello world ");
throwit();
System.out.println("Done with try block ");
}
finally
{
System.out.println("Finally executing ");
}
}
}
which answer most closely indicates the behavior of the program?
A -
The program will not compile.
B -
The program will print Hello world, then will print that a RuntimeException has occurred, then will print Done with try block, and then will print Finally executing.
C -
The program will print Hello world, then will print that a RuntimeException has occurred, and then will print Finally executing.
D -
The program will print Hello world, then will print Finally executing, then will print that a RuntimeException has occurred.
4-
public class ExceptionTest
{
class TestException extends Exception {}
public void runTest() throws TestException {}
public void test() /* Point X */
{
runTest();
}
}
At Point X on line 5, which code is necessary to make the code compile?
A -
No code is necessary.
B -
throws Exception
C -
catch ( Exception e )
D -
throws RuntimeException
5-
System.out.print("Start ");
try
{
System.out.print("Hello world");
throw new FileNotFoundException();
}
System.out.print(" Catch Here "); /* Line 7 */
catch(EOFException e)
{
System.out.print("End of file exception");
}
catch(FileNotFoundException e)
{
System.out.print("File not found");
}
and given that EOFException and FileNotFoundException are both subclasses of IOException, and further assuming this block of code is placed into a class, which statement is most true concerning this code?
A -
The code will not compile.
B -
Code output: Start Hello world File Not Found.
C -
Code output: Start Hello world End of file exception.
D -
Code output: Start Hello world Catch Here File not found.
6-
Which statement is true?
A -
Catch(X x) can catch subclasses of X where X is a subclass of Exception.
B -
The Error class is a RuntimeException.
C -
Any statement that can throw an Error must be enclosed in a try block.
D -
Any statement that can throw an Exception must be enclosed in a try block.
7-
Which four can be thrown using the throw statement?
Error
Event
Object
Throwable
Exception
RuntimeException
A -
1, 2, 3 and 4
B -
2, 3, 4 and 5
C -
1, 4, 5 and 6
D -
2, 4, 5 and 6
8-
Which statement is true?
A -
A try statement must have at least one corresponding catch block.
B -
Multiple catch statements can catch the same class of exception more than once.
C -
An Error that might be thrown in a method must be declared as thrown by that method, or be handled within that method.
D -
Except in case of VM shutdown, if a try block starts to execute, a corresponding finally block will always start to execute.
9-
Suppose that you would like to create an instance of a new Map that has an iteration order that is the same as the iteration order of an existing instance of a Map. Which concrete implementation of the Map interface should be used for the new instance?
A -
TreeMap
B -
HashMap
C -
LinkedHashMap
D -
The answer depends on the implementation of the existing instance.
10-
Which class does not override the equals() and hashCode() methods, inheriting them directly from class Object?
