Question 1

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

Accepted Answer

A) True 
 B)False

Question 2

If a program does not handle an unchecked exception, what is the result?

Accepted Answer

A)  The program must handle the exception. 
B)  The program is halted and the default exception handler handles the exception. 
C)  The exception is ignored. 
D)  A compiler error will occur. 
A)  The program must handle the exception. 
B)  The program is halted and the default exception handler handles the exception. 
C)  The exception is ignored. 
D)  A compiler error will occur.

Question 3

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

Accepted Answer

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

Question 4

The catch clause

Accepted Answer

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

Question 5

To serialize an object and write it to the file, use this method of the ObjectOutputStream class.

Accepted Answer

A)  WriteObject 
B)  SerializeObject 
C)  Serialize 
D)  SerializeAndWrite 
A)  WriteObject 
B)  SerializeObject 
C)  Serialize 
D)  SerializeAndWrite

Question 6

An exception object's default error message can be retrieved using this method.

Accepted Answer

A)  getMessage 
B)  getDefaultMessage 
C)  getDefaultErrorMessage 
D)  getErrorMessage 
A)  getMessage 
B)  getDefaultMessage 
C)  getDefaultErrorMessage 
D)  getErrorMessage

Question 7

What will be the result of the following statements?
FileInputStream fstream = new FileInputStream("Input.dat"); DataInputStream inFile = new DataInputStream(fstream);

Accepted Answer

A)  The inFile variable will reference an object that is able to read random access data from the Input.dat file. 
B)  The inFile variable will reference an object that is able to read text data from the Input.dat file. 
C)  The inFile variable will reference an object that is able to read binary data from the Input.dat file. 
D)  The inFile variable will reference an object that is able to write binary data to the Input.dat file. 
A)  The inFile variable will reference an object that is able to read random access data from the Input.dat file. 
B)  The inFile variable will reference an object that is able to read text data from the Input.dat file. 
C)  The inFile variable will reference an object that is able to read binary data from the Input.dat file. 
D)  The inFile variable will reference an object that is able to write binary data to the Input.dat file.

Question 8

A(n) ________ is one or more statements that are executed and can potentially throw an exception.

Accepted Answer

A)  exception block 
B)  catch block 
C)  try block 
D)  error block 
A)  exception block 
B)  catch block 
C)  try block 
D)  error block

Question 9

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

Accepted Answer

A) True 
 B)False

Question 10

When you write a method that throws a checked exception, you must

Accepted Answer

A)  override the default error method. 
B)  ensure that the error will occur at least once each time the program is executed. 
C)  have a throws clause in the method header. 
D)  use each class only once in a method. 
A)  override the default error method. 
B)  ensure that the error will occur at least once each time the program is executed. 
C)  have a throws clause in the method header. 
D)  use each class only once in a method.

Question 11

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

Accepted Answer

A) True 
 B)False

Question 12

Look at the following code:
FileInputStream fstream = new FileInputStream("info.dat"); DataInputStream inputFile = new DataInputStream(fstream);
This code could also be written as

Accepted Answer

A)  DataInputStream inputFile = new DataInputStream(new FileInputStream("info.dat")); 
B)  DataInputStream inputFile = new DataInputStream("info.txt"); 
C)  FileInputStream inputFile = new FileInputStream(new DataInputStream("info.dat")); 
D)  FileInputStream fstream = new DataInputStream("info.txt"); 
A)  DataInputStream inputFile = new DataInputStream(new FileInputStream("info.dat")); 
B)  DataInputStream inputFile = new DataInputStream("info.txt"); 
C)  FileInputStream inputFile = new FileInputStream(new DataInputStream("info.dat")); 
D)  FileInputStream fstream = new DataInputStream("info.txt");

Question 13

If a random access file contains a stream of characters, which of the following statements would move the file pointer to the starting byte of the fifth character in the file?

Accepted Answer

A)  file.seek(4); 
B)  file.seek(8); 
C)  file.seek(10); 
D)  file.seek(5); 
A)  file.seek(4); 
B)  file.seek(8); 
C)  file.seek(10); 
D)  file.seek(5);

Question 14

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

Accepted Answer

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

Question 15

The RandomAccessFile class treats a file as a stream of

Accepted Answer

A)  bytes. 
B)  characters. 
C)  integers. 
D)  data. 
A)  bytes. 
B)  characters. 
C)  integers. 
D)  data.

Question 16

Classes that inherit from the Error class are

Accepted Answer

A)  for exceptions that are thrown when an IOException occurs, and the application program should not try to handle them. 
B)  for exceptions that are thrown when a critical error occurs, and the application program should not try to handle them. 
C)  for exceptions that are thrown when an IOException error occurs, and the application program should try to handle them. 
D)  for exceptions that are thrown when a critical error occurs, and the application program should try to handle them. 
A)  for exceptions that are thrown when an IOException occurs, and the application program should not try to handle them. 
B)  for exceptions that are thrown when a critical error occurs, and the application program should not try to handle them. 
C)  for exceptions that are thrown when an IOException error occurs, and the application program should try to handle them. 
D)  for exceptions that are thrown when a critical error occurs, and the application program should try to handle them.

Question 17

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

Question 18

A file that contains raw binary data is known as a(n)

Accepted Answer

A)  binary file. 
B)  machine file. 
C)  serial file. 
D)  raw data file. 
A)  binary file. 
B)  machine file. 
C)  serial file. 
D)  raw data file.

Question 19

If the data.dat file does not exist, what will happen when the following statement is executed?
RandomAccessFile randomFile = new RandomAccessFile("data.dat", "rw");

Accepted Answer

A)  An IOExcepton will be thrown. 
B)  The file data.dat will be created. 
C)  A FileNotFoundException will be thrown. 
D)  A compiler error will occur. 
A)  An IOExcepton will be thrown. 
B)  The file data.dat will be created. 
C)  A FileNotFoundException will be thrown. 
D)  A compiler error will occur.

Question 20

The ability to catch multiple types of exceptions with a single catch clause is known as multi-catch, and was introduced in Java 7.

Accepted Answer

A) True 
 B)False

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

If a program does not handle an unchecked exception, what is the result?

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

The catch clause

To serialize an object and write it to the file, use this method of the ObjectOutputStream class.

An exception object's default error message can be retrieved using this method.

What will be the result of the following statements? FileInputStream fstream = new FileInputStream("Input.dat"); DataInputStream inFile = new DataInputStream(fstream);

A(n) ________ is one or more statements that are executed and can potentially throw an exception.

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

When you write a method that throws a checked exception, you must

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

Look at the following code: FileInputStream fstream = new FileInputStream("info.dat"); DataInputStream inputFile = new DataInputStream(fstream); This code could also be written as

If a random access file contains a stream of characters, which of the following statements would move the file pointer to the starting byte of the fifth character in the file?

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

The RandomAccessFile class treats a file as a stream of

Classes that inherit from the Error class are

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

A file that contains raw binary data is known as a(n)

If the data.dat file does not exist, what will happen when the following statement is executed? RandomAccessFile randomFile = new RandomAccessFile("data.dat", "rw");

The ability to catch multiple types of exceptions with a single catch clause is known as multi-catch, and was introduced in Java 7.

Introduction to Computers and Java

Java Fundamentals

A First Look at Classes and Objects

Decision Structures

Loops and Files

A Second Look at Classes and Objects

Arrays and the ArrayList Class

Text Processing and Wrapper Classes

Inheritance

GUI Applications–Part 1

GUI Applications–Part 2

Applets and More

Creating GUI Applications with JavaFX

Recursion

Databases

Filters

Exam 10: Exceptions and Advanced File I/O

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

If a program does not handle an unchecked exception, what is the result?

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

The catch clause

To serialize an object and write it to the file, use this method of the ObjectOutputStream class.

An exception object's default error message can be retrieved using this method.

What will be the result of the following statements? FileInputStream fstream = new FileInputStream("Input.dat"); DataInputStream inFile = new DataInputStream(fstream);

A(n) ________ is one or more statements that are executed and can potentially throw an exception.

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

When you write a method that throws a checked exception, you must

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

Look at the following code: FileInputStream fstream = new FileInputStream("info.dat"); DataInputStream inputFile = new DataInputStream(fstream); This code could also be written as

If a random access file contains a stream of characters, which of the following statements would move the file pointer to the starting byte of the fifth character in the file?

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

The RandomAccessFile class treats a file as a stream of

Classes that inherit from the Error class are

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

A file that contains raw binary data is known as a(n)

If the data.dat file does not exist, what will happen when the following statement is executed? RandomAccessFile randomFile = new RandomAccessFile("data.dat", "rw");

The ability to catch multiple types of exceptions with a single catch clause is known as multi-catch, and was introduced in Java 7.

Introduction to Computers and Java

Java Fundamentals

A First Look at Classes and Objects

Decision Structures

Loops and Files

A Second Look at Classes and Objects

Arrays and the ArrayList Class

Text Processing and Wrapper Classes

Inheritance

GUI Applications–Part 1

GUI Applications–Part 2

Applets and More

Creating GUI Applications with JavaFX

Recursion

Databases

Filters