Deck 19: Java Never Ends

Question 1

An alternative to deriving a thread from the Thread class is to inherit the Runnable interface.

Answer 1

False

Question 2

The programming statements used to accomplish a threads task should be included in the method:

A)start)
B)init)
C)run)
D)none of the above

Answer 2

C

Question 3

What method in the Thread class is responsible for pausing a thread for a specific amount of milliseconds?

A)pause)
B)sleep)
C)hang)
D)kill)

Answer 3

B

Question 4

The FXML file in a JavaFX application contains the code that controls what happens when GUI components are selected.

Question 5

SQL stands for Structured Query Language.

Question 6

The Java language does not support multithreading.

Question 7

A server creates at least two sockets,one to listen for input,and another that is created when a client connects to the server.

Question 8

____________ is an enhancement of simple accessor and mutator methods.

A)Event handling
B)Introspection
C)Persistence
D)None of the above

Question 9

The JavaFX scene graph:

A)Is used to plot XY graphs
B)Describes the layout of GUI components in a JavaFX application
C)Is an application that is used to lay out components in a JavaFX application
D)Is used with lambda expressions to define nameless functions

Question 10

____________ means that an object has an identity that extends beyond one session.

A)Event handling
B)Introspection
C)Persistence
D)None of the above

Question 11

If your class implements Runnable then what method is invoked to start the thread?

A)run)
B)execute)
C)start)
D)main)

Question 12

An InterruptedException is a checked exception.

Question 13

The Java library that supports database connectivity is called:

A)ODBC
B)CDBC
C)MDBC
D)JDBC

Question 14

The sleep method of the Thread class requires one formal parameter that represents the number of:

A)nanoseconds
B)microseconds
C)picoseconds
D)milliseconds

Question 15

____________ refers to a framework that facilitates software building by connecting software components from diverse sources.

A)JavaBeans
B)Threads
C)SQL
D)all of the above

Question 16

What is an advantage of applying Java 8 lambda expressions to a Collection class?

A)The potential for syntax errors is reduced
B)The JVM can parallelize operations applied to elements of the collection
C)The collection can be displayed graphically
D)Lambda expressions help map the collection to a database

Question 17

A thread's start method invokes the thread's run method.

Question 18

Threads execute in a ___________ fashion.

A)parallel
B)serial
C)complex
D)none of the above

Question 19

When a server executes the accept)method it:

A)Blocks and waits for a connection
B)Checks for a connection and if there is none it exits
C)Blocks but in a new thread
D)Any of the above,depending on the input parameters to accept)

Question 20

Java's Thread class is in the ____________ package.

A)java.util
B)java.thread
C)java.lang
D)javax.swing

Question 21

What is a JavaBean?

Question 22

What other programming technique can be combined with sockets so a server can handle requests from multiple clients?

Question 23

Discuss the components of the JavaBean model.

Question 24

What are Enterprise JavaBeans?

Question 25

What is a socket?

Question 26

Rewrite the following code to use a Lambda expression for the button action listener.
import java.util.ArrayList;
import javax.swing.JButton;
import javax.swing.JFrame;
import java.awt.Color;
import java.awt.Container;
import java.awt.FlowLayout;
public class ButtonDemo3 extends JFrame
{
public ButtonDemo3 )
{
setSize250,100);
setDefaultCloseOperationJFrame.EXIT_ON_CLOSE);
setTitle"Button Demo");
Container contentPane = getContentPane );
contentPane.setBackgroundColor.BLUE);
contentPane.setLayoutnew FlowLayout ));
JButton goButton = new JButton"Green");
goButton.addActionListener
{ e } - > contentPane.setBackgroundColor.GREEN));
contentPane.addgoButton);
}
public static void mainString[] args)
{
ButtonDemo3 buttonGui = new ButtonDemo3 );
buttonGui.setVisibletrue);
}
}