Question 1

Which of the following statements about the try/finally statement is NOT true?

Accepted Answer

A) The finally clause is executed if the body of the try completes without exception. 
B) The finally clause is executed if the body of the try throws exception. 
C) The finally clause is executed after the exception is propagated to its handler. 
D) The finally clause typically represents cleanup code that is to be executed whether or not an exception occurs.

Question 2

When reading words with a Scanner object, a word is defined as ____.

Accepted Answer

A) any sequence of characters consisting of letters only. 
B) any sequence of characters consisting of letters, numbers, and punctuation symbols only. 
C) any sequence of characters consisting of letters and numbers only. 
D) any sequence of characters that is not white space.

Question 3

Assuming that the string input contains the digits of an integer, without any additional characters, which expression obtains the corresponding numeric value?

Accepted Answer

A) Integer.parseInteger(input) 
B) Integer.parseInt(input) 
C) Int.parseInt(input) 
D) input.parseInt()

Question 4

Select the missing expression in the code fragment below.The method should continue to prompt the user for a valid integer value until one is entered.The method returns the final value entered.

Accepted Answer

A) catch (IllegalArgumentException exception) 
B) finally 
C) catch (NumberFormatException exception) 
D) catch (NoSuchElementException exception)

Question 5

Consider the following code snippet.
Scanner inputFile = new Scanner("dataIn.txt");
Which of the following statements is correct?

Accepted Answer

A) This code will not open a file named "dataIn.txt", but will treat the string "dataIn.txt" as an input value. 
B) This code will open a file named "dataIn.txt" for writing. 
C) This code will create a new file named "dataIn.txt". 
D) This code will open an existing file named "dataIn.txt" for reading.

Question 6

What is recommended if the standard library does not have an exception class that describes your particular error situation?

Accepted Answer

A) Design your own exception class as a subclass of an existing exception class. 
B) Choose RunTimeException from the standard library because it is unchecked and represents a generic exception. 
C) Design your own exception class by implementing the Throwable interface. 
D) Design your own exception class as a superclass of an existing exception class.

Question 7

Which of the following statements about a PrintWriter object is true?

Accepted Answer

A) A PrintWriter will be automatically closed when the program exits. 
B) No data loss will occur if the program fails to close a PrintWriter before exiting. 
C) An exception will occur if the program fails to close a PrintWriter before exiting. 
D) Data loss may occur if a program fails to close a PrintWriter object before exiting.

Question 8

Consider the following code snippet.
Scanner inputFile = new Scanner("hoursWorked.txt");
Which of the following statements is correct?

Accepted Answer

A) This code will open an existing file named "hoursWorked.txt" for reading. 
B) This code will create a new file named "hoursWorked.txt". 
C) This code will treat the string "hoursWorked.txt" as an input value. 
D) This code will open a file named "hoursWorked.txt" for writing.

Question 9

Which of the following is the correct syntax for creating a File object?

Accepted Answer

A) File inFile = new File("input.txt"); 
B) File inFile = File.open("input.txt"); 
C) File inFile = File("input.txt"); 
D) File inFile = new File.open("input.txt");

Question 10

The PrintWriter class is an enhancement of the ____ class.

Accepted Answer

A) File 
B) ReadStream 
C) Scanner 
D) PrintStream

Question 11

Assume inputFile is a Scanner object used to read data from a text file that contains a series of double values.Select an expression to complete the following code segment, which reads the values and prints them in standard output, one per line, in a field 15 characters wide, with two digits after the decimal point.

Accepted Answer

A) System.out.printf("%15f",value); 
B) System.out.printf("%.2f",value); 
C) System.out.printf("%15.2f
",value); 
D) System.out.printf("%15.2f",value);

Question 12

Which exception class should you use from the standard library if you want to thrown an exception when there are insufficient funds in a bank account to cover a withdrawal?

Accepted Answer

A) OutOfBoundsException 
B) RunTimeException 
C) IOException 
D) IllegalArgumentException

Question 13

Your program must read in an existing text file.You want the program to terminate if any exception related to the file occurs.Which of the following indicates the correct code for the header of the main method?

Accepted Answer

A) public static void main(String[] args) throws FileNotFoundException 
B) public static void main(String[] args) 
C) public static void main(String[] args) throws IOException 
D) public static void main(String[] args) throws UnknownFileException

Question 14

Select an expression to complete the following statement, which is designed to construct a PrintWriter object to write the program output to a file named dataout.txt.
PrintWriter theFile = _______________________;

Accepted Answer

A) new Scanner("dataout.txt") 
B) new File("dataout.txt") 
C) new PrintWriter("dataout.txt") 
D) new PrintStream("dataout.txt")

Question 15

Select an expression to complete the program segment below, which displays an error message and terminates normally if the String variable accountNumber does not contain an integer value.

Accepted Answer

A) NumberFormatException exception 
B) InputMismatchException exception 
C) ArithmeticException exception 
D) IOException exception

Question 16

Insert the missing code in the following code fragment.This code is intended to open a file and handle the situation where the file cannot be found.

Accepted Answer

A) catch (IllegalArgumentException exception) 
B) catch (new exception (IOException)) 
C) catch (IOException) 
D) catch (IOException exception)

Question 17

In the hierarchy of Exception classes, the NumberFormatException class is a subclass of the ____ class.

Accepted Answer

A) ClassCastException 
B) IllegalStateException 
C) IllegalArgumentException 
D) ArithmeticException

Question 18

Consider the following code snippet, assuming that filename represents the name of the output file and writeData outputs the data to that file:  Which of the following statements about this code is correct?

Accepted Answer

A) The file will be closed regardless of when an exception occurs. 
B) The file will be closed only if the writeData() statement throws an exception. 
C) The file will be closed only if the PrintWriter constructor throws an exception. 
D) It is not possible to determine whether the file will be closed if an exception occurs.

Question 19

Consider the following code snippet:
throw IllegalArgumentException("This operation is not allowed!");
Which of the following statements about this code is correct?

Accepted Answer

A) This code constructs an object of type IllegalArgumentException and throws the object. 
B) This code throws an existing IllegalArgumentException object. 
C) This code constructs an object of type IllegalArgumentException and reserves it for future use. 
D) This code will not compile.

Question 20

Consider the following code snippet:  Which of the following statements about this code is correct?

Accepted Answer

A) This code will read in a single character from the file in each iteration of the loop. 
B) This code will read in the entire contents of the file in a single iteration of the loop. 
C) This code will read in a single word from the file in each iteration of the loop. 
D) This code will read in an entire line from the file in each iteration of the loop.

Exam 11: Input/Output and Exception Handling

Which of the following statements about the try/finally statement is NOT true?

When reading words with a Scanner object, a word is defined as ____.

Assuming that the string input contains the digits of an integer, without any additional characters, which expression obtains the corresponding numeric value?

Select the missing expression in the code fragment below.The method should continue to prompt the user for a valid integer value until one is entered.The method returns the final value entered.

Consider the following code snippet. Scanner inputFile = new Scanner("dataIn.txt") ; Which of the following statements is correct?

What is recommended if the standard library does not have an exception class that describes your particular error situation?

Which of the following statements about a PrintWriter object is true?

Consider the following code snippet. Scanner inputFile = new Scanner("hoursWorked.txt") ; Which of the following statements is correct?

Which of the following is the correct syntax for creating a File object?

The PrintWriter class is an enhancement of the ____ class.

Which exception class should you use from the standard library if you want to thrown an exception when there are insufficient funds in a bank account to cover a withdrawal?

Your program must read in an existing text file.You want the program to terminate if any exception related to the file occurs.Which of the following indicates the correct code for the header of the main method?

Select an expression to complete the following statement, which is designed to construct a PrintWriter object to write the program output to a file named dataout.txt. PrintWriter theFile = _______________________;

Select an expression to complete the program segment below, which displays an error message and terminates normally if the String variable accountNumber does not contain an integer value.

Insert the missing code in the following code fragment.This code is intended to open a file and handle the situation where the file cannot be found.

In the hierarchy of Exception classes, the NumberFormatException class is a subclass of the ____ class.

Consider the following code snippet, assuming that filename represents the name of the output file and writeData outputs the data to that file: Which of the following statements about this code is correct?

Consider the following code snippet: throw IllegalArgumentException("This operation is not allowed!") ; Which of the following statements about this code is correct?

Consider the following code snippet: Which of the following statements about this code is correct?