Question 1

If a random access file contains a stream of characters,which of the following would you use to set the pointer on the fifth character?

Accepted Answer

A)  file.seek(4); 
B)  file.seek(5); 
C)  file.seek(9); 
D)  file.seek(8); 
A)  file.seek(4); 
B)  file.seek(5); 
C)  file.seek(9); 
D)  file.seek(8); D

Question 2

If,within one try statement you want to have catch clauses that catch exceptions of the following types,in which order should they appear in your program? (1)Throwable
(2)Exception
(3)RuntimeException
(4)NumberFormatException

Accepted Answer

A)  4,3,2,1 
B)  2,3,1,4 
C)  4,1,3,2 
D)  3,1,2,4 
A)  4,3,2,1 
B)  2,3,1,4 
C)  4,1,3,2 
D)  3,1,2,4 A

Question 3

In the following code,assume that inputFile references a Scanner object that has been successfully used to open a file: double totalIncome = 0.0;
While (inputFile.hasNext())
{
Try
{
TotalIncome += inputFile.nextDouble();
}
Catch(InputMismatchException e)
{
System.out.println("Non-numeric data encountered " +
"in the file.");
InputFile.nextLine();
}
Finally
{
TotalIncome = 35.5;
}
}
What will be the value of totalIncome after the following values are read from the file?
2)5
8)5
3)0
5)5
Abc
1)0

Accepted Answer

A)  19.5 
B)  0.0 
C)  35.5 
D)  75.0 
A)  19.5 
B)  0.0 
C)  35.5 
D)  75.0 C

Question 4

The following catch statement can catch (Exception e){…}

Accepted Answer

A)  can handle all exceptions that are instances of the Exception class,but not a subclass of Exception. 
B)  handle all throwable objects by using polymorphic reference as a parameter in the catch clause. 
C)  handle all exceptions that are instances of the Exception class or a subclass of Exception. 
D)  is an error since no objects are instantiated in the Exception class. 
A)  can handle all exceptions that are instances of the Exception class,but not a subclass of Exception. 
B)  handle all throwable objects by using polymorphic reference as a parameter in the catch clause. 
C)  handle all exceptions that are instances of the Exception class or a subclass of Exception. 
D)  is an error since no objects are instantiated in the Exception class.

Question 5

In a catch statement,what does the following code do? System.out.println(e.getMessage());

Accepted Answer

A)  It prints the stack trace. 
B)  It prints the error message for an exception. 
C)  It prints the code that caused the exception. 
D)  It overrides the toString method 
A)  It prints the stack trace. 
B)  It prints the error message for an exception. 
C)  It prints the code that caused the exception. 
D)  It overrides the toString method

Question 6

If a method does not handle a possible checked exception,what must the method have?

Accepted Answer

A)  A catch clause in its header 
B)  A try/catch clause in its header 
C)  A try clause in its header 
D)  A throws clause in its header 
A)  A catch clause in its header 
B)  A try/catch clause in its header 
C)  A try clause in its header 
D)  A throws clause in its header

Question 7

This is a section of code that gracefully responds to exceptions when they are thrown.

Accepted Answer

A)  Thrown class 
B)  Default exception handler 
C)  Exception 
D)  Exception handler 
A)  Thrown class 
B)  Default exception handler 
C)  Exception 
D)  Exception handler

Question 8

The catch clause

Accepted Answer

A)  follows the try clause. 
B)  starts with the word catch followed by a parameter list in parentheses containing an ExceptionType parameter variable. 
C)  contains code to gracefully handle the exception type listed in the parameter list. 
D)  All of the above. 
A)  follows the try clause. 
B)  starts with the word catch followed by a parameter list in parentheses containing an ExceptionType parameter variable. 
C)  contains code to gracefully handle the exception type listed in the parameter list. 
D)  All of the above.

Question 9

The IllegalArgumentException class extends the RuntimeException class,and is therefore

Accepted Answer

A)  a checked exception class. 
B)  an unchecked exception class 
C)  never used directly 
D)  None of the above 
A)  a checked exception class. 
B)  an unchecked exception class 
C)  never used directly 
D)  None of the above

Question 10

Why does the following code cause a compiler error? try
{
Number = Integer.parseInt(str);
}
Catch (IllegalArgumentException e)
{
System.out.println("Bad number format.");
}
Catch (NumberFormatException e)
{
System.out.println(str + " is not a number.");
}

Accepted Answer

A)  Because you can have only one catch clause in a try statement. 
B)  Because NumberFormatException inherits from IllegalArgumentException.The code should handle NumberFormatException before IllegalArgumentException. 
C)  Because the Integer.parseInt method does not throw a NumberFormatException. 
D)  Because the Integer.parseInt method does not throw an IllegalArgumentException. 
A)  Because you can have only one catch clause in a try statement. 
B)  Because NumberFormatException inherits from IllegalArgumentException.The code should handle NumberFormatException before IllegalArgumentException. 
C)  Because the Integer.parseInt method does not throw a NumberFormatException. 
D)  Because the Integer.parseInt method does not throw an IllegalArgumentException.

Question 11

When writing a string to a binary file or reading a string from a binary file,it is recommended that you use

Accepted Answer

A)  Methods that use UTF-8 encoding 
B)  The Scanner class methods 
C)  The FileReader and Writer class methods 
D)  The System.In and System.Out methods 
A)  Methods that use UTF-8 encoding 
B)  The Scanner class methods 
C)  The FileReader and Writer class methods 
D)  The System.In and System.Out methods

Question 12

When an exception is thrown by code in the try block,the JVM begins searching the try statement for a catch clause that can handle it and passes control of the program to

Accepted Answer

A)  each catch clause that can handle the exception. 
B)  the last catch clause that can handle the exception. 
C)  the first catch clause that can handle the exception. 
D)  If there are two or more catch clauses that can handle the exception,the program halts. 
A)  each catch clause that can handle the exception. 
B)  the last catch clause that can handle the exception. 
C)  the first catch clause that can handle the exception. 
D)  If there are two or more catch clauses that can handle the exception,the program halts.

Question 13

When an object is serialized,it is converted into a series of bytes that contain the object's
data.

Accepted Answer

A) True 
 B)False

Question 14

The throw statement informs the compiler that a method throws one or more exception.

Accepted Answer

A) True 
 B)False

Question 15

A(n)________ is an object that is generated in memory as the result of an error or an unexpected event.

Accepted Answer

A)  exception handler 
B)  exception 
C)  default exception handler 
D)  error message 
A)  exception handler 
B)  exception 
C)  default exception handler 
D)  error message

Question 16

When deserializing an object using the readObject method,you must cast the return value to the desired class type.

Accepted Answer

A) True 
 B)False

Question 17

What will be the result of the following code? FileOutputStream fstream new FileOutputStream("Output.dat");
DataOutputStream outputFile = new DataOutputStream(fstream);

Accepted Answer

A)  The outputFile variable will reference an object that is able to write text data only to the Output.dat file. 
B)  The outputFile variable will reference an object that is able to write binary data to the Output.dat file. 
C)  The outputFile variable will reference an object that is able to read binary data from the Output.dat file. 
D)  The outputFile variable will reference an object that is able to write to Output.dat as a random access file. 
A)  The outputFile variable will reference an object that is able to write text data only to the Output.dat file. 
B)  The outputFile variable will reference an object that is able to write binary data to the Output.dat file. 
C)  The outputFile variable will reference an object that is able to read binary data from the Output.dat file. 
D)  The outputFile variable will reference an object that is able to write to Output.dat as a random access file.

Question 18

The call stack is an internal list of all the methods that are currently executing.

Accepted Answer

A) True 
 B)False

Question 19

Given the following constructor code,which of the statements are true? public Book(String ISBNOfBook,double priceOfBook,
Int numberOrderedOfBook)
{
If (ISBNOfBook == "")
Throw new BlankISBN();
If (priceOfBook < 0)
Throw new NegativePrice(priceOfBook);
If (numberedOrderedOfBook < 0)
Throw new NegativeNumberOrdered(numberOrderedv);
ISBN = ISBNOfBook;
Price = priceOfBook;
NumberedOrdered = numberOrderedOfBook;
}

Accepted Answer

A)  There is an error: a throws clause should be added to the constructor header. 
B)  Classes extending the Exception class should be created for each of the custom exceptions that are thrown in the constructor. 
C)  The calling method must handle the exceptions thrown in the constructor,or have its own throws clause specifying them. 
D)  All of the above. 
A)  There is an error: a throws clause should be added to the constructor header. 
B)  Classes extending the Exception class should be created for each of the custom exceptions that are thrown in the constructor. 
C)  The calling method must handle the exceptions thrown in the constructor,or have its own throws clause specifying them. 
D)  All of the above.

Question 20

What will the following code display? String input = "99#7";
Int number;
Try
{
Number = Integer.parseInt(input);
}
Catch(NumberFormatException ex)
{
Number = 0;
}
Catch(RuntimeException ex)
{
Number = 1;
}
Catch(Exception ex)
{
Number = -1;
}
System.out.println(number);

Accepted Answer

A)  99 
B)  997 
C)  0 
D)  1 
A)  99 
B)  997 
C)  0 
D)  1

If a random access file contains a stream of characters,which of the following would you use to set the pointer on the fifth character?

If,within one try statement you want to have catch clauses that catch exceptions of the following types,in which order should they appear in your program? (1)Throwable (2)Exception (3)RuntimeException (4)NumberFormatException

The following catch statement can catch (Exception e){…}

In a catch statement,what does the following code do? System.out.println(e.getMessage());

If a method does not handle a possible checked exception,what must the method have?

This is a section of code that gracefully responds to exceptions when they are thrown.

The catch clause

The IllegalArgumentException class extends the RuntimeException class,and is therefore

Why does the following code cause a compiler error? try { Number = Integer.parseInt(str); } Catch (IllegalArgumentException e) { System.out.println("Bad number format."); } Catch (NumberFormatException e) { System.out.println(str + " is not a number."); }

When writing a string to a binary file or reading a string from a binary file,it is recommended that you use

When an exception is thrown by code in the try block,the JVM begins searching the try statement for a catch clause that can handle it and passes control of the program to

When an object is serialized,it is converted into a series of bytes that contain the object's data.

The throw statement informs the compiler that a method throws one or more exception.

A(n)________ is an object that is generated in memory as the result of an error or an unexpected event.

When deserializing an object using the readObject method,you must cast the return value to the desired class type.

What will be the result of the following code? FileOutputStream fstream new FileOutputStream("Output.dat"); DataOutputStream outputFile = new DataOutputStream(fstream);

The call stack is an internal list of all the methods that are currently executing.

What will the following code display? String input = "99#7"; Int number; Try { Number = Integer.parseInt(input); } Catch(NumberFormatException ex) { Number = 0; } Catch(RuntimeException ex) { Number = 1; } Catch(Exception ex) { Number = -1; } System.out.println(number);

Introduction to Computers and Java

Java Fundamentals

Decision Structures

Loops and Files

Methods

A First Look at Classes

A First Look at Gui Applications

Arrays and the Arraylist Class

A Second Look at Classes and Objects

Text Processing and More About Wrapper Classes

Inheritance

Advanced Gui Applications

Applets and More

Recursion

Sorting, Searching, and Algorithm Analysis

Generics

Collections

Array-Based Lists

Linked Lists

Stacks and Queues

Binary Trees, Avl Trees, and Priority Queues

Filters

Exam 12: Exceptions and Advanced File Io

If a random access file contains a stream of characters,which of the following would you use to set the pointer on the fifth character?

If,within one try statement you want to have catch clauses that catch exceptions of the following types,in which order should they appear in your program? (1)Throwable (2)Exception (3)RuntimeException (4)NumberFormatException

The following catch statement can catch (Exception e){…}

In a catch statement,what does the following code do? System.out.println(e.getMessage());

If a method does not handle a possible checked exception,what must the method have?

This is a section of code that gracefully responds to exceptions when they are thrown.

The catch clause

The IllegalArgumentException class extends the RuntimeException class,and is therefore

Why does the following code cause a compiler error? try { Number = Integer.parseInt(str); } Catch (IllegalArgumentException e) { System.out.println("Bad number format."); } Catch (NumberFormatException e) { System.out.println(str + " is not a number."); }

When writing a string to a binary file or reading a string from a binary file,it is recommended that you use

When an exception is thrown by code in the try block,the JVM begins searching the try statement for a catch clause that can handle it and passes control of the program to

When an object is serialized,it is converted into a series of bytes that contain the object's data.

The throw statement informs the compiler that a method throws one or more exception.

A(n)________ is an object that is generated in memory as the result of an error or an unexpected event.

When deserializing an object using the readObject method,you must cast the return value to the desired class type.

What will be the result of the following code? FileOutputStream fstream new FileOutputStream("Output.dat"); DataOutputStream outputFile = new DataOutputStream(fstream);

The call stack is an internal list of all the methods that are currently executing.

What will the following code display? String input = "99#7"; Int number; Try { Number = Integer.parseInt(input); } Catch(NumberFormatException ex) { Number = 0; } Catch(RuntimeException ex) { Number = 1; } Catch(Exception ex) { Number = -1; } System.out.println(number);

Introduction to Computers and Java

Java Fundamentals

Decision Structures

Loops and Files

Methods

A First Look at Classes

A First Look at Gui Applications

Arrays and the Arraylist Class

A Second Look at Classes and Objects

Text Processing and More About Wrapper Classes

Inheritance

Advanced Gui Applications

Applets and More

Recursion

Sorting, Searching, and Algorithm Analysis

Generics

Collections

Array-Based Lists

Linked Lists

Stacks and Queues

Binary Trees, Avl Trees, and Priority Queues

Filters