Question 1

To handle window events, if the class containing the application program does not extend the definition of another class, you can make that class extend the definition of the class ____.

Accepted Answer

A)  MouseAdapter 
B)  Adapter 
C)  WindowAdapter 
D)  WindowListener

Question 2

If a negative value is used for an array index, ____.

Accepted Answer

A)  a NumberFormatException is thrown 
B)  the program terminates automatically without throwing an exception 
C)  the last index of the array is automatically accessed instead 
D)  an ArrayIndexOutOfBoundsException is thrown

Question 3

If you have created an exception class, you can define other exception classes extending the definition of the exception class you created.

Accepted Answer

A) True 
 B)False

Question 4

int number;
Boolean done = false;do
{
Try
{
System.out.print("Enter an integer: ");
Number = console.nextInt();
System.out.println();
Done = true;
System.out.println("number = " + number);
}
Catch (InputMismatchException imeRef)
{
Str = console.next();
System.out.println("Exception "
+ imeRef.toString()
+ " " + str);
}
}
While (!done);What is the most likely type of exception in the code in the accompanying figure?

Accepted Answer

A)  IllegalArgumentException 
B)  InputMismatchException 
C)  FileNotFoundException 
D)  NumberFormatException

Question 5

NoSuchElementException is a method of the class Exception.

Accepted Answer

A) True 
 B)False

Question 6

The class Exception contains two constructors.

Accepted Answer

A) True 
 B)False

Question 7

When an exception occurs, an object of a particular exception class is created.

Accepted Answer

A) True 
 B)False

Question 8

How many finally blocks can there be in a try/catch structure?

Accepted Answer

A)  There must be one finally block. 
B)  There can be one finally block following each catch block. 
C)  There can be zero or one finally blocks following the last catch block. 
D)  There is no limit to the number of finally blocks following the last catch block.

Question 9

int number;
Boolean done = false;do
{
Try
{
System.out.print("Enter an integer: ");
Number = console.nextInt();
System.out.println();
Done = true;
System.out.println("number = " + number);
}
Catch (InputMismatchException imeRef)
{
Str = console.next();
System.out.println("Exception "
+ imeRef.toString()
+ " " + str);
}
}
While (!done);How many times will the code in the try block in the accompanying figure execute?

Accepted Answer

A)  Until the user specifies that he/she wants to quit the program 
B)  Until the user inputs a valid integer 
C)  If there is an exception thrown, it will execute just once because the program will terminate at that point. 
D)  Zero times; the program will terminate before it reaches the try block.

Question 10

An unchecked exception is any exception that causes a program to terminate.

Accepted Answer

A) True 
 B)False

Question 11

Statements that might generate an exception are placed in a catch block.

Accepted Answer

A) True 
 B)False

Question 12

The class RuntimeException is the superclass of which of the following classes?

Accepted Answer

A)  NullPointerException 
B)  NoSuchMethodException 
C)  IllegalAccessException 
D)  NoSuchFileException

Question 13

A checked exception is any exception checked for by the programmer.

Accepted Answer

A) True 
 B)False

Question 14

import java.util.*;
Public class ExceptionExample1
{
Static Scanner console = new Scanner(System.in); public static void main(String[] args)
{
Int dividend, divisor, quotient; try
{
System.out.print("Enter dividend: ");
Dividend = console.nextInt();
System.out.println();
System.out.print("Enter divisor: ");
Divisor = console.nextInt();
System.out.println();
Quotient = dividend / divisor;
System.out.println("quotient = " + quotient);
}
Catch (ArithmeticException aeRef)
{
System.out.println("Exception" + aeRef.toString());
}
Catch (InputMismatchException imeRef)
{
System.out.println("Exception "
+ imeRef.toString());
}
Catch( IOException ioeRef)
{
System.out.println("Exception "
+ ioeRef.toString());
}
}
}Which of the following will cause the first exception to occur in the code in the accompanying figure?

Accepted Answer

A)  If the divisor is zero 
B)  If the dividend is zero 
C)  If the quotient is zero 
D)  This code will not compile, so an exception cannot be triggered.

Question 15

The methods getMessage and printStackTrace are private methods of the class Throwable.

Accepted Answer

A) True 
 B)False

Question 16

Which of the following statements is true?

Accepted Answer

A)  The class Exception, which is derived from the class Object, is the superclass of the class Throwable. 
B)  The class Throwable, which is derived from the class Exception, is the superclass of the class Object. 
C)  The class Throwable, which is derived from the class Object, is the superclass of the class Exception. 
D)  None of these

Question 17

If an exception occurs in a try block and that exception is caught by a catch block, then the remaining catch blocks associated with that try block are ignored.

Accepted Answer

A) True 
 B)False

Question 18

import java.util.*;
Public class ExceptionExample1
{
Static Scanner console = new Scanner(System.in); public static void main(String[] args)
{
Int dividend, divisor, quotient; try
{
System.out.print("Enter dividend: ");
Dividend = console.nextInt();
System.out.println();
System.out.print("Enter divisor: ");
Divisor = console.nextInt();
System.out.println();
Quotient = dividend / divisor;
System.out.println("quotient = " + quotient);
}
Catch (ArithmeticException aeRef)
{
System.out.println("Exception" + aeRef.toString());
}
Catch (InputMismatchException imeRef)
{
System.out.println("Exception "
+ imeRef.toString());
}
Catch( IOException ioeRef)
{
System.out.println("Exception "
+ ioeRef.toString());
}
}
}Which method throws the second exception in the code in the accompanying figure?

Accepted Answer

A)  nextInt 
B)  toString 
C)  println 
D)  nextLine

Question 19

The JList GUI component generates events that call the actionStateChanged method.

Accepted Answer

A) True 
 B)False

Question 20

A message is returned by which method of an Exception object?

Accepted Answer

A)  printMessage() 
B)  getMessage() 
C)  printStackTrace() 
D)  traceMessage()

Exam 11: Handling Exceptions and Events

To handle window events, if the class containing the application program does not extend the definition of another class, you can make that class extend the definition of the class ____.

If a negative value is used for an array index, ____.

If you have created an exception class, you can define other exception classes extending the definition of the exception class you created.

NoSuchElementException is a method of the class Exception.

The class Exception contains two constructors.

When an exception occurs, an object of a particular exception class is created.

How many finally blocks can there be in a try/catch structure?

An unchecked exception is any exception that causes a program to terminate.

Statements that might generate an exception are placed in a catch block.

The class RuntimeException is the superclass of which of the following classes?

A checked exception is any exception checked for by the programmer.

The methods getMessage and printStackTrace are private methods of the class Throwable.

Which of the following statements is true?

If an exception occurs in a try block and that exception is caught by a catch block, then the remaining catch blocks associated with that try block are ignored.

The JList GUI component generates events that call the actionStateChanged method.

A message is returned by which method of an Exception object?