Question 14 pts

(TCOs 16) The column names that are displayed in a JTable can be specified by using the _____ method of the DefaultTableModel.

.formatColumns

.setColumns

.setColumnNames

.setColumnIdentifiers

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Question 24 pts

(TCOs 16) What is the output of the code below? double num = 56.4321; System.out.printf("%.2f", 56.4321);

%.2f

%.2f56.4321

56.43

56.4321

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Question 34 pts

(TCOs 16) The signature of a method consists of

method name and parameter list.

return type

method name.

parameter list.

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Question 44 pts

(TCOs 16) Assume int[ ] t = {1, 2, 3, 4}. What is t.length?

5

4

0

3

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Question 54 pts

(TCOs 1 ,2, and 6) If a class contains a main method, that method is executed

automatically when the class is run.

when another method within the class calls it.

when an object is created from the class.

None of the above

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Question 64 pts

(TCOs 16) Invoking _____ returns the first element in an ArrayList x.

x.get(1)

x.get()

x.get(0)

x.first()

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Question 74 pts

(TCO 1, 4, and 6) The maximum number of radio buttons that can be selected within a ButtonGroup is

1.

2.

5.

all.

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Question 84 pts

(TCOs 16) Which statements are most accurate regarding the following classes? class A { private int i; protected int j; } class B extends A { private int k; protected int m; }

An object of B contains data fields j, m.

An object of B contains data fields j, k, m.

An object of B contains data fields k, m.

An object of B contains data fields i, j, k, m.

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Question 94 pts

(TCOs 16) Suppose ArrayList x contains two strings [Beijing, Singapore]. Which of the following methods will cause the list to become [Beijing, Chicago, Singapore]?

x.add("Chicago")

x.add(2, "Chicago")

x.add(0, "Chicago")

x.add(1, "Chicago")

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Question 104 pts

(TCOs 1, 5, and 6) The StringTokenizer method used to return the next field based on the delimiter character specified is

nextField.

nextToken.

Token.

Field.

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Question 114 pts

(TCOs 16) Which of the following statements causes the program to terminate when closing the frame?

frame.setDefaultCloseOperation(null)

frame.setDefaultCloseOperation(JFrame.STOP_ON_CLOSE)

frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE)

frame.setDefaultCloseOperation(JFrame.TERMINATE_ON_CLOSE)

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Question 124 pts

(TCOs 1, 5, and 6) Which type of exception occurs if the write method of BufferedWriter cannot write data to the file?

WriteException

IOException

FileIOException

FileException

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Question 134 pts

(TCOs 16) What layout manager should you use so that every component occupies the same size in the container?

any layout

a FlowLayout

a BorderLayout

a GridLayout

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Question 144 pts

(TCOs 16) The event handler (e.g., actionPerformed) is a method in

both source and listener object.

the EventObject class.

a listener object.

a source object.

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Question 154 pts

(TCOs 16) The _____ method of JOptionPane is used to display a message dialog box.

showMessage

displayMessageDialog

showMessageDialog

displayMessage

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Question 164 pts

(TCOs 1, 4, and 6) Menus are attached to windows by calling the _____ method.

addMenuBar

setJMenuBar

setMenu

addJMenuBar

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Question 174 pts

(TCOs 16) Suppose you wish to provide an accessor method for a double instance variable named percent, what should the signature method be?

public static void getPercent()

public double getPercent()

public int getPercent()

public void getPercent()

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Question 184 pts

(TCOs 1, 4, and 6) The method used to add panels to a JTabbedPane is

newTab.

newPanel.

addPanel.

addTab.

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Question 194 pts

(TCOs 16) A constructor cannot

be overloaded.

initialize variables to their defaults.

specify return types or return values.

have the same name as the class.

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Question 204 pts

(TCOs 16) Given the declaration Circle x = new Circle(), which of the following statements is most accurate?

x contains an int value.

You can assign an int value to x.

x contains an object of the Circle type.

x contains a reference to a Circle object.

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Question 214 pts

(TCOs 1, 5, and 6) To add a database driver to a NetBeans project, you can add the JAR file for the driver to what folder?

The Source Packages folder

The Libraries folder

The Files folder

The Services folder

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Question 224 pts

(TCOs 16) _____ represents an entity in the real world that can be distinctly identified.

A class

An object

A data field

A method

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Question 234 pts

(TCOs 16) To execute the query "select * from Address" using the Statement object named stmt that has been properly configured with a database connection, use

stmt.executeUpdate("select * from Address");.

stmt.execute("select * from Address");.

stmt.executeQuery("select * from Address");.

stmt.query("select * from Address");.

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Question 244 pts

(TCOs 16) Suppose that your program accesses a MySQL database. Which of the following statements is false?

If the database is not available, the program will have a runtime error when attempting to create a connection object.

If the driver for MySQL database is not in the classpath, the program will have a runtime error, indicating that the driver class cannot be loaded.

If the driver for MySQL database is not in the classpath, the program will have a syntax error.

If the database connection cannot be made, a SQLException occurs.

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Question 254 pts

(TCOs 16) Which of the following statements is false?

PreparedStatement is for SQL SELECT statements only. You cannot create a PreparedStatement for SQL UPDATE statements.

The parameters in a prepared statement are denoted using the ? sign.

PreparedStatement is efficient for repeated executions.

The first parameter in a perpared statement is number 1.

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Question 264 pts

(TCOs 16) Which method can be used to write data to a text file opened with the BufferedWriter object outfile?

outfile.newLine();

outfile.existLine();

Write(outfile);

outfile.write();

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Question 274 pts

(TCOs 16) Which type of exception occurs when creating a BufferedReader object for a nonexistent file?

FileNotExist

FileNotFound

FileNotExistException

FileNotFoundException

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Question 284 pts

(TCOs 16) Which class can be used to write data into a text file?

File

BufferedWriter

FileWrite

WriteFile

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Question 294 pts

(TCOs 16) Result set meta data are retrieved through

a Statement object.

a Connection object.

a ResultSet object.

a PreparedStatement object.

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Question 304 pts

(TCOs 16) Clicking a JCheckBox object generates _____ events.

ComponentEvent

ContainerEvent

ActionEvent

JCheckBoxEvent

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Question 314 pts

(TCOs 16) The method _____ gets the contents of the text field txtName.

txtName.findString()

txtName.getText(s)

txtName.getString()

txtName.getText()

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Question 324 pts

(TCOs 16) The method _____ appends a string s into the text area jta.

jta.appendText(s)

jta.append(s)

jta.setText(s)

jta.insertText(s)

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Question 334 pts

(TCOs 16) The method _____ gets the text (or caption) of the button btnAdd.

btnAdd.text()

btnAdd.findText()

btnAdd.retrieveText().

btnAdd.getText()

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Question 344 pts

(TCOs 16) A JList object can be populated with data stored in a(n) _____ object.

ModelList

DefaultListModel

ListArray

DefaultModelList

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Question 354 pts

(TCOs 16) The _____ method of a check box returns true if that button is checked.

isSelected()

getSelected()

Selected()

isChecked()