Deck 7: Inputoutput and Exception Handling

Question 1

The PrintWriter class is an enhancement of the ____ class.

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

Answer 1

C

Question 2

Consider the following code snippet.
File hoursFile = new File("hoursWorked.txt");
Your program must read the contents of this file using a Scanner object. Which of the following is the correct syntax for doing this?

A) Scanner in = new Scanner("hoursWorked.txt");
B) Scanner in = Scanner("hoursWorked.txt");
C) Scanner in = new Scanner(hoursFile);
D) Scanner in = Scanner.open(hoursFile);

Answer 2

C

Question 3

Under which condition will the Scanner constructor generate a FileNotFoundException?

A) If the input file cannot be opened due to a security error.
B) If the input file does not exist.
C) If the input file already exists, but has data in it.
D) If the input file already exists, but is empty.

Answer 3

B

Question 4

Consider the following code snippet:
PrintWriter out = new PrintWriter("output.txt");
Which of the following statements about the PrintWriter object is correct?

A) If a file named "output.txt" already exists, an exception will occur.
B) If a file named "output.txt" already exists, data will be added at the end of the file.
C) If a file named "output.txt" already exists, existing data will be deleted before data are added to the file.
D) If a file named "output.txt" already exists, a new file named "output_1.txt" will be created and used.

Question 5

Insert the missing code in the following code fragment. This fragment is intended to read an input file named dataIn.txt and write to an output file named dataOut.txt.
Public static void main(String[] args) throws FileNotFoundException
{
String inputFileName = "dataIn.txt";
String outputFileName = "dataOut.txt";
File inputFile = _________________;
Scanner in = new Scanner(inputFile)
) . .
}

A) new File(inputFileName)
B) new File(outputFileName)
C) new File(inputFile)
D) new File(System.in)

Question 6

Which of the following statements reflects the textbook's recommendations about closing files?

A) Both the input and the output file do not need to be explicitly closed in the program.
B) Only the input file must be explicitly closed in the program.
C) Only the output file must be explicitly closed in the program.
D) Both the input and the output file should be explicitly closed in the program.

Question 7

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

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

Question 8

Under which condition will the PrintWriter constructor generate a FileNotFoundException?

A) If the output file cannot be opened or created due to a security error.
B) If the output file does not exist.
C) If the output file already exists, but has data in it.
D) If the output file already exists, but is empty.

Question 9

Which of the following statements about using the PrintWriter object is correct?

A) If the output file already exists, the new data will be appended to the end of the file.
B) If the output file does not exist, a FileNotFoundException will occur.
C) If the output file already exists, the existing data will be discarded before new data are written into the file.
D) If the output file does not exist, an IllegalArgumentException will occur.

Question 10

Which of the following objects should be used for reading from a text file?

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

Question 11

Your program will read in an existing text file. You want the program to terminate if the file does not exist. Which of the following indicates the correct code for the main method header?

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

Question 12

Consider the following code snippet:
Public static void main(String[] args) throws IOException
Which of the following statements about this code is correct?

A) The main method is designed to catch and handle all types of exceptions.
B) The main method is designed to catch and handle the IOException.
C) The main method should simply terminate if the IOException occurs.
D) The main method will not terminate if any exception occurs.

Question 13

Consider the following code snippet:
File inputFile = new File("input.txt");
You wish to read the contents of this file using a Scanner object. Which of the following is the correct syntax for doing this?

A) Scanner in = Scanner ("input.txt")
B) Scanner in = new Scanner ("input.txt")
C) Scanner in = Scanner.open(inputFile)
D) Scanner in = new Scanner(inputFile)

Question 14

Insert the missing code in the following code fragment. This fragment is intended to read an input file.
Public static void main(String[] args) throws FileNotFoundException
{
String inputFileName = "dataIn.txt";
String outputFileName = "dataOut.txt";
File inputFile = new File(inputFileName);
Scanner in = _______________;
) . .
}

A) new Scanner(inputFileName)
B) new Scanner(outputFileName)
C) new Scanner(inputFile)
D) new Scanner(System.in)

Question 15

Which of the following statements about reading and writing text files is correct?

A) You use the Scanner class to read and write text files.
B) You use the PrintWriter class to read and write text files.
C) You use the Scanner class to read text files and the PrintWriter class to write text files.
D) You use the Scanner class to write text files and the PrintWriter class to read text files.

Question 16

Insert the missing code in the following code fragment. This fragment is intended to read a file and write to a file.
Public static void main(String[] args) throws FileNotFoundException
{
String inputFileName = "dataIn.txt";
String outputFileName = "dataOut.txt";
File inputFile = new File(inputFileName);
Scanner in = new Scanner(inputFile);
PrintWriter out = _____________;
) . .
}

A) new PrintWriter(outputFileName)
B) new Scanner(outputFileName)
C) new PrintWriter(outputFile)
D) new Scanner(outputFile)

Question 17

Insert the missing code in the following code fragment. This fragment is intended to read an input file named dataIn.txt and write to an output file named dataOut.txt.
Public static void main(String[] args) throws FileNotFoundException
{
String inputFileName = "dataIn.txt";
String outputFileName = "dataOut.txt";
File inputFile = new File(inputFileName);
Scanner in = _________;
) . .
}

A) new File(inputFileName)
B) new File("dataIn.txt")
C) new Scanner(inputFile)
D) new Scanner("dataIn.txt")

Question 18

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

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

Question 19

Consider the following code snippet:
Public static void main(String[] args) throws FileNotFoundException
Which of the following statements about this code is correct?

A) The main method is designed to catch and handle all types of exceptions.
B) The main method is designed to catch and handle the FileNotFoundException.
C) The main method should simply terminate if the FileNotFoundException occurs.
D) The main method will not terminate if any exception occurs.

Question 20

Insert the missing code in the following code fragment. This fragment is intended to read an input file.
Public static void main(String[] args) __________________
{
String inputFileName = "dataIn.txt";
File inputFile = new File(inputFileName);
Scanner in = new Scanner(inputFile);
) . .
}

A) extends FileNotFoundException
B) throws FileNotFoundException
C) inherits FileNotFoundException
D) catches FileNotFoundException

Question 21

Which of the following statements about using a PrintWriter object is NOT true?

A) A PrintWriter will be automatically closed when the program exits.
B) Data loss may occur if a program fails to close a PrintWriter object before exiting.
C) PrintWriter is an enhancement of the PrintStream class.
D) A program can write to a PrintWriter using println.

Question 22

Insert the missing code in the following code fragment. This fragment is intended to read an input file named dataIn.txt that resides in a folder named payroll on the C: drive of a Windows system.
Public static void main(String[] args) throws FileNotFoundException
{
File inputFile = ________;
Scanner in = new Scanner(inputFile);
) . .
}

A) new File(c:/payroll/"dataIn.txt")
B) new File(c://payroll//"dataIn.txt")
C) new File("c:\payroll\dataIn.txt")
D) new File("c:\\payroll\\dataIn.txt")

Question 23

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

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

Question 24

Consider the following code snippet.
PrintWriter outFile = new PrintWriter("dataOut.txt");
Which of the following statements about the PrintWriter object is correct?

A) If a file named "dataOut.txt" already exists, an exception will occur.
B) If a file named "dataOut.txt" already exists, existing data will be deleted before new data is added to the file.
C) If a file named "dataOut.txt" already exists, new data will be added to the end of the file.
D) If a file named "dataOut.txt" already exists, a new file named "dataOut_1.txt" will be created and used.

Question 25

Your program wishes to open a file named C:\java\myProg\input.txt on a Windows system. Which of the following is the correct code to do this?

A) inputFile = new File("c:\java\myProg\input.txt");
B) inputFile = new File.open("c:\java\myProg\input.txt");
C) inputFile = new File("c:\\java\\myProg\\input.txt");
D) inputFile = new File.open("c:\\java\\myProg\\input.txt");

Question 26

Insert the missing code in the following code fragment. This fragment is intended to write an output file named dataOut.txt that resides in a folder named reports on the C: drive of a Windows system.
Public static void main(String[] args) throws IOException
{
PrintWriter outputFile = _______;
) . .
}

A) new PrintWriter("c:/reports/dataOut.txt")
B) new PrintWriter("c://reports//dataOut.txt")
C) new PrintWriter("c:\reports\dataOut.txt")
D) new PrintWriter("c:\\reports\\dataOut.txt")

Question 27

Insert the missing code in the following code fragment. This fragment is intended to read an input file named hoursWorked.txt. You want the program to terminate if the file does not exist.
Public static void main(String[] args) ______________
{
File inputFile = new File("hoursWorked.txt");
Scanner in = new Scanner(inputFile);
) . .
}

A) catch FileMissingException
B) catch FileNotFoundException
C) throws FileMissingException
D) throws FileNotFoundException

Question 28

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 main method?

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

Question 29

Which method of the JFileChooser object will return the file object that describes the file chosen by the user at runtime?

A) getFile()
B) getSelectedFilePath()
C) getSelectedFile()
D) getFilePath()

Question 30

Insert the missing code in the following code fragment. This fragment is intended to read binary data.
Public static void main(String[] args) throws IOException
{
String address = "http://horstmann.com/bigjava.gif";
URL imageLocation = _________;
InputStream in = imageLocation.openStream());
) . .
}

A) new Scanner("http://horstmann.com/bigjava.gif")
B) new Scanner(address)
C) new imageLocation.openStream
D) new URL(address)

Question 31

Which return value of the JFileChooser object's showOpenDialog method indicates that a file was chosen by the user at run time?

A) APPROVE_OPTION
B) CANCEL_OPTION
C) OK_OPTION
D) SELECTED_OPTION

Question 32

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

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 create a new file named "dataIn.txt".
C) This code will open an existing file named "dataIn.txt" for reading.
D) This code will open a file named "dataIn.txt" for writing.

Question 33

Insert the missing code in the following code fragment. This fragment is intended to read a web page.
Public static void main(String[] args) throws IOException
{
String address = "http://horstmann.com/index.html";
URL pageLocation = new URL(address);
Scanner in = _________;
) . .
}

A) new Scanner("http://horstmann.com/index.html")
B) new Scanner(pageLocation)
C) new Scanner(new File(pageLocation))
D) new Scanner(pageLocation.openStream())

Question 34

Which Java class implements a file dialog box for selecting a file by a program with a graphical user interface?

A) JOptionPane
B) JFileOption
C) JFilePane
D) JFileChooser

Question 35

Which of the following statements about reading web pages is true?

A) A Scanner object cannot be used to read a web page.
B) You must create a File object to use with a Scanner object to read a web page.
C) You must create a URL object to use with a Scanner object to read a web page.
D) You must use the openStream() method of a Scanner object to read a web page.

Question 36

Your program must read in an existing text file. You want the program to terminate if the file does not exist. Which of the following indicates the correct code for the main method header?

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

Question 37

Which of the following statements about reading and writing binary data is correct?

A) You use the Scanner class to read and write binary data.
B) You use the PrintWriter class to read and write binary data.
C) You use the InputStream class to read binary data and the FileOutputStream class to write binary data.
D) You use the InputStream class to write binary data and the FileOutputStream class to read binary data.

Question 38

Insert the missing code in the following code fragment. This fragment is intended to read binary data.
Public static void main(String[] args) throws IOException
{
String address = "http://horstmann.com/bigjava.gif";
URL imageLocation = new URL(address);
InputStream in = _________;
) . .
}

A) new Scanner("http://horstmann.com/bigjava.gif")
B) new Scanner(imageLocation)
C) new imageLocation.openStream
D) imageLocation.openStream()

Question 39

Consider the following code snippet.
PrintWriter outputFile = new PrintWriter("payrollReport.txt");
Which of the following statements about the PrintWriter object is correct?

A) If a file named "payrollReport.txt" already exists, an exception will occur.
B) If a file named "payrollReport.txt" already exists, existing data will be deleted before new data is added to the file.
C) If a file named "payrollReport.txt" already exists, new data will be added to the end of the file.
D) If a file named "payrollReport.txt" already exists, a new file named "payrollReport_1.txt" will be created and used.

Question 40

Insert the missing code in the following code fragment. This fragment is intended to allow the user to select a file to be opened.
JFileChooser chooser = new JFileChooser();
Scanner in = null;
If (chooser.showOpenDialog(null) == JFileChooser.APPROVE_OPTION)
{
File selectedFile = __________;
In = new Scanner(selectedFile);
) . .
}

A) chooser.getFileName()
B) chooser.getSelectedFileName()
C) chooser.getFilePath()
D) chooser.getSelectedFile()

Question 41

Insert the missing code in the following code fragment. This fragment is intended to read all words from a text file.
File inputFile = new File("dataIn.txt");
Scanner in = new Scanner(dataIn.txt);
While (____________)
{
String input = in.next();
System.out.println(input);
}

A) in.getNext()
B) in.peek()
C) in.hasNext()
D) in.nextWord()

Question 42

Which of the following patterns should be used for the delimiter to read one character at a time using a Scanner object's next method?

A) Scanner in = new Scanner(. . .);
In)useDelimiter("[^A-Za-z]+");
B) Scanner in = new Scanner(. . .);
In)useDelimiter("[A-Za-z]+");
C) Scanner in = new Scanner(. . .);
In)useDelimiter("[^0-9]+");
D) Scanner in = new Scanner(. . .);
In)useDelimiter("");

Question 43

Which of the following statements about white space in Java is correct?

A) In Java, white space includes spaces only.
B) In Java, white space includes spaces and tab characters only.
C) In Java, white space includes spaces, tab characters, and newline characters.
D) In Java, white space includes spaces, tab characters, newline characters, and punctuation.

Question 44

Consider the following code snippet:
Scanner in = new Scanner(. . .);
While (in.hasNextInt())
{
) . .
}
Under which condition will the body of the while loop be processed?

A) When an integer value is encountered in the input.
B) When a non-integer value is encountered in the input.
C) When an alphabetic value is encountered in the input.
D) When any numeric value is encountered in the input.

Question 45

When reading words using a Scanner object's next method, ____.

A) any characters at the beginning of the input that are considered to be white space are consumed and become part of the word being read.
B) any characters at the beginning of the input that are considered to be white space are consumed and do not become part of the word being read.
C) the program must discard white space characters at the beginning of the input before calling the next method.
D) any characters that are considered to be white space within the word become part of the word.

Question 46

Consider the following code snippet.
File inputFile = new File("dataIn.txt");
Scanner in = new Scanner(inputFile);
While (in.hasNext())
{
String input = in.next();
}
Which of the following statements about this code is correct?

A) This code will read in a word at a time from the input file.
B) This code will read in the entire input file in one operation.
C) This code will read in a line at a time from the input file.
D) This code will read in a character at a time from the input file.

Question 47

The ____ method of the Character class will indicate if a character contains white space.

A) isValid()
B) getChar()
C) hasNext()
D) isWhiteSpace()

Question 48

Insert the missing code in the following code fragment. This fragment is intended to read floating-point numbers from a text file.
Scanner in = new Scanner(. . .);
While (____________)
{
Double hoursWorked = in.nextDouble();
System.out.println(hoursWorked);
}

A) in.getNextDouble()
B) in.peek()
C) in.hasNextDouble()
D) in.readNextWord()

Question 49

Insert the missing code in the following code fragment. This fragment is intended to read characters from a text file.
Scanner in = new Scanner(. . .);
In)useDelimiter("");
While (in.hasNext())
{
Char ch = ____________;
System.out.println(ch);
}

A) in.getNext()
B) in.next()
C) in.next.charAt(0)
D) in.nextChar()

Question 50

Consider the following code snippet:
Scanner in = new Scanner(. . .);
In)useDelimiter("[^0-9]+");
What characters will be ignored and not read in using this code?

A) Only alphabetic characters will be ignored.
B) Only numeric characters will be ignored.
C) Only non-alphabetic characters will be ignored.
D) Only non-numeric characters will be ignored.

Question 51

Consider the following code snippet:
Scanner in = new Scanner(. . .);
While (in.hasNextLine())
{
String input = in.nextLine();
System.out.println(input);
}
Which of the following statements about this code is correct?

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

Question 52

Which String class method will remove spaces from the beginning and the end of a string?

A) truncate()
B) trim()
C) clean()
D) strip()

Question 53

Consider the following code snippet:
Scanner in = new Scanner(. . .);
In)useDelimiter("[^0-9A-Za-z]+");
What characters will be ignored and not read in using this code?

A) Only alphabetic characters will be ignored.
B) Only numeric characters will be ignored.
C) Characters that are neither alphabetic nor numeric will be ignored.
D) Both alphabetic and numeric characters will be ignored.

Question 54

Consider the following code snippet.
Scanner in = new Scanner(. . .);
While (in.hasNextDouble())
{
Double input = in.nextDouble();
}
Which of the following statements about this code is correct?

A) This code will read in one word at a time from the input file.
B) This code will read in the entire input file in one operation.
C) This code will read in one floating point value at a time from the input file.
D) This code will read in one character at a time from the input file.

Question 55

The Scanner class's ____ method is used to specify a pattern for word boundaries when reading text.

A) useDelimiter()
B) usePattern()
C) setDelimiter()
D) setPattern()

Question 56

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

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 57

Consider the following code snippet.
Scanner in = new Scanner(. . .);
While (in.hasNextLine())
{
String input = in.nextLine();
}
Which of the following statements about this code is correct?

A) This code will read in a word at a time from the input file.
B) This code will read in the entire input file in one operation.
C) This code will read in a line at a time from the input file.
D) This code will read in a character at a time from the input file.

Question 58

Consider the following code snippet:
Scanner in = new Scanner(. . .);
Int ageValue = in.nextInt();
If there is no integer number appearing next in the input, what will occur?

A) ageValue will contain a null value.
B) ageValue will contain a zero.
C) ageValue will contain whatever characters are encountered.
D) An exception will occur.

Question 59

Consider the following code snippet:
Scanner in = new Scanner(. . .);
While (in.hasNextInt())
{
) . .
}
Under which condition will the body of the while loop be processed?

A) When an integer value is encountered in the input.
B) When a non-integer value is encountered in the input.
C) When any numeric value is encountered in the input.
D) When any type of value is encountered in the input.

Question 60

Consider the following code snippet:
Scanner in = new Scanner(. . .);
In)useDelimiter("[^A-Za-z]+");
What characters will be ignored and not read in when using this code?

A) Only alphabetic characters will be ignored.
B) Only numeric characters will be ignored.
C) Only non-alphabetic characters will be ignored.
D) Only non-numeric characters will be ignored.

Question 61

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

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 62

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

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

Question 63

Which statement about handling exceptions is true?

A) If an exception has no handler, the error will be ignored.
B) Statements that may cause exceptions should be placed inside a catch clause.
C) Statements to handle exceptions should be placed inside a try clause
D) If an exception has no handler, the program will be terminated.

Question 64

Which method of an exception object will provide information about the chain of method calls that led to the exception?

A) printCallStack()
B) getCallStack()
C) printStackTrace()
D) getStackTrace()

Question 65

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.
Try
{
String filename = . . .;
Scanner in = new Scanner(new File(filename));
) . .
}
___________________
{
Exception.printStackTrace();
}

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

Question 66

When you start a Java program from a command line and supply argument values, the values ____.

A) are stored as int values
B) are stored as float values
C) are stored as String values
D) are stored as the type of value indicated by the argument

Question 67

Consider the following code snippet:
Scanner in = new Scanner(. . .);
String result = "";
Int number = 0;
If (in.hasNextInt())
{
Number = in.nextInt();
}
Result = in.next();
If the input begins with the characters 626.14 average, what values will number and result have after this code is executed?

A) number will contain the value 626 and result will contain the value 14.
B) number will contain the value 626.14 and result will contain the value average.
C) number will contain the value 0 and result will contain the value 626.14.
D) number will contain the value 0 and result will contain the value average.

Question 68

Consider the following code snippet:
Scanner in = new Scanner(. . .);
In)useDelimiter("[A-Za-z]+");
What characters will be read in using this code?

A) Only alphabetic characters will be read in.
B) Only numeric characters will be read in.
C) Only non-alphabetic characters will be read in.
D) Only non-numeric characters will be read in.

Question 69

Consider the following code snippet:
System.out.printf("%-12s%8.2f",description,totalPrice);
Which of the following statements is correct?

A) This code will produce 2 columns, with the description field left justified and the totalPrice field right justified.
B) This code will produce 2 columns, with the description field right justified and the totalPrice field right justified.
C) This code will produce 2 columns, with the description field right justified and the totalPrice field left justified.
D) This code will produce 2 columns, with the description field left justified and the totalPrice field left justified.

Question 70

Consider the following code snippet:
If (in.hasNextDouble())
{
Number = in.nextDouble();
}
Result = in.next();
If the input contains the characters 626.14 average, what values will number and result have after this code is executed?

A) number will contain the value 626 and result will contain the value 14.
B) number will contain the value 626.14 and result will contain the value average.
C) number will contain the value 0 and result will contain the value 626.14.
D) number will contain the value 0 and result will contain the value average.

Question 71

Which of the following statements about exception handling is correct?

A) Statements that may cause an exception should be placed within a catch block.
B) The main method of a Java program will handle any error encountered in the program.
C) Statements that may cause an exception should be placed within a throws block.
D) Statements that may cause an exception should be placed within a try block.

Question 72

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

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 73

Which method of an exception object will retrieve a description of the exception that occurred?

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

Question 74

Which of the following statements about command line arguments is correct?

A) Command line arguments must be read with a Scanner object.
B) You must declare additional parameters in the main method to receive command line argument values.
C) You cannot pass arguments to a program when starting the program from a command line prompt.
D) Command line arguments can be read using the main method's args parameter.

Question 75

Which of the following is the correct syntax for starting a Java program named myProg from a command line if the program requires two arguments named arg1 and arg2 to be supplied?

A) java myProg arg1 arg2
B) java myProg(arg1, arg2)
C) java myProg "arg1" "arg2"
D) java myProg arg1, arg2

Question 76

You have opened a command prompt window and you have entered the following:
Java myProg Bob Smith
Which of the following statements is correct?

A) You have supplied one argument value, and this value can be accessed in the main method using the arg1 parameter.
B) You have supplied two argument values, and these values can be accessed in the main method using the arg1 and arg2 parameters.
C) You have supplied one argument value, and this value can be accessed in the main method using the args parameter.
D) You have supplied two argument values, and these values can be accessed in the main method using the args parameter.

Question 77

Which of the following statements about exception reporting is true?

A) Use the reportError statement to report that an exception has occurred.
B) Use the reportException statement to report that an exception has occurred.
C) Use the throwException statement to report that an exception has occurred.
D) Use the throw statement to report that an exception has occurred.

Question 78

What is the purpose of the throw statement?

A) It is used to pass arguments to another method.
B) It is used to detect an error situation.
C) It is used to pass control to an error handler when an error situation is detected.
D) It is used to discard erroneous input.

Question 79

You wish to use the Scanner class's nextInt() method to read in whole numbers. To avoid exceptions that would occur if the input is not a whole number, you should use the ____ method before calling nextInt.

A) hasNext()
B) hasNextInteger()
C) hasIntegerValue()
D) hasNextInt()

Question 80

Which of the following statements about checked and unchecked exceptions is true?

A) Checked exceptions are handled by the Java runtime.
B) The compiler ensures that the program is handling unchecked exceptions.
C) The compiler ensures that the program is handling checked exceptions.
D) All exceptions that are descendants of RunTimeException are checked exceptions.