1 If a class uses any method that has been
defined to create exception objects, then the
compiler must be notified of the intentions
regarding this object. How is this notification
commonly referred to in Java?
and in actions that occur during the processing
of an applet.
Throwing and Handling
Handle and Declare
Code and Handle
Throwing and Catching
Java errors
code or data errors
standard errors
user-defined errors
2 The finally clause is not executed under which
one of the following conditions?
7 What is true of a catch block that reports a
message for a specific type of exception?
The code in the try block includes a break.
The code in the try block includes a return.
The System.exit() method is called within a try or
catch block.
The code in the try block executes properly.
The catch block must specify the type of exception
it is designed to catch.
The catch block must have code to handle any
type of exception and print the appropriate
message.
The catch block does not necessarily need to
specify the type of exception. The system will
know by the code that is included in the block.
The catch block is followed by a finally block
that prints the message specified by the catch
block.
3 When you have statements in your code block
that can throw exceptions, there are several
choices for things you must do. Which one of the
following is not one of these options?
Do nothing. Ignore the exception
Declare the exception
Handle the exception
Handle, re-throw and declare the exception
4 What is the purpose of a try block?
The try block is used to catch unwanted types of
objects.
The try block contains code that may generate an
exception.
The try block throws exceptions in order to test
the exception handling of the system.
The try block is used to debug code that has not
been proven and may contain exceptions.
5 Which class is the super class for all Exception
and Error classes?
Applet
Graphics
AWT
Throwable
6 Certain errors are known and expected to
occur during the processing of a method,
specifically errors in accessing files, in obtaining
network connections, in receiving data from a
database, in sending instructions to a database,
Which one of the following is used to categorize
the errors listed above?
8 What are the steps that describe how to create
your own customized exceptions?
Create a class with the correct exception, in a
method from the exception class throw the
exception, and use the method in the try-catch
block.
Create a class that extends Exception, in a
method from the exception class throw the
exception, and use the method in a try-catch
block.
Create a class that extends Exception, in a
method of another class throw the exception, and
use the method that throws the exception in a trycatch block.
Create a class that extends Exception, in a
method from the exception class throw the
exception, and use the method in a finally block.
9
In the code listing provided, why must "throws
IOException" be included in the line "public
static void main (String args [ ]) throws
IOException"?
"import java.io.*;" is used in the program.
"throws IOException" is used in all main
methods.
The call stack unwinds and the exception must
be handled by the main method.
"aStudent.setName();" can throw an
IOException.
10 What is the correct definition of a handler?
A section of code in which an exception may
occur.
A section of code that executes when a button is
clicked.
A section of code that contains the instructions
concerning what to do with an exception.
The main section of code for the class that
executes.
11 What must be done when a method re-throws
an exception?
You must declare the exception in the method
signature.
You must first catch the exception with a catch
statement.
You must use a subclass of the exception.
You must unwind the call stack.
12 If present, which block of code will be
executed when a try block completes without any
exceptions?
main
catch
finally
return
13 What must be true when a method throws
more than one type of exception?
The method signature must list the exception
types and order they are thrown.
The method signature must list the exception
types.
The method signature must list the exception
types and number of each exception type
anticipated.
The method signature must use the keyword
multiple in the signature.
14 What is an exception?
a representation of an exception condition
unexpected code written by the programmer
unexpected results after the program has
terminated normally
untrusted code such as a virus
15 Which of the following statements is correct?
A try catch block has one or more try blocks
and one or more catch blocks.
A try catch block has one try block and one or
more catch blocks.
A try catch block has one try block and one
catch block.
A try catch block has one or more try blocks
and one catch block.
16 Which one of the following statements
correctly defines an exception?
An exception is a representation of an error
condition or any situation that is not the expected
result of a method.
An exception is a representation of a condition
or situation that occurs when your code executes
normally.
An exception is the block of code that executes
when your program terminates abnormally.
An exception is an error that occurs at compile
time.
17 Choose the item that best describes one of the
results a program should have when the
environment returns an unexpected result.
Notify or alert the user there has been an error.
Clear the screen and restart the machine.
Contact Cisco Systems with the error code.
Copy the original data to the error database.
18 What package contains the IOException
class?
java.util.*
java.text.*
java.io.*
java.error.*
19 What happens when an uncaught exception
occurs in the main() method?
The program initiates.
The program ends.
The program prints.
The program recompiles.
20 The order of the try, catch, and finally blocks
is very important. Which of the following is not
correct?
The order of the try, catch, finally blocks must
be in that order only.
A finally block is not necessary, only a nice to
have feature.
Other blocks of code can exist between your try,
catch, and finally blocks as long as the try block is
first, some other code is second, catch blocks are
next, followed by the finally block.
A try block cannot exist without at least one
catch block, or if no catch block exists then a
finally block is required.
The local variables should be declared in both
the try block and the catch block.
23 What should be done when you have
statements that can throw exceptions in your
code?
You should let the operating system handle all
exceptions.
You should include code from the handler class
to catch the exception.
You should declare the exception in a throws
clause, or place the statements in a
try/catch/finally block.
You should ignore all exceptions.
21 What must be done when throwing an integer
as an exception?
24 When an exception occurs in a try block, what
happens to the code execution in the try block?
Integers cannot be thrown.
Declare integers as throwable.
Import the exception class.
Encapsulate the integer handler.
The finally block is executed next.
The exception is thrown.
The catch blocks are executed.
The try block is terminated.
22 How are local variables declared when using
try and catch blocks, if you want to print their
values when an exception occurs?
25 What does the programmer have to do to
handle a user-defined exception?
The local variables should be declared in the try
block.
The local variables should be declared in the
catch block.
The local variables should be declared locally
outside the try and catch blocks.
Write the exception as a start method.
Handle the exception as an error.
Write the exception as a part of the Component
class.
Handle it no differently than any other checked
exception.