Question 1

Discuss the components of the JavaBean model.

Accepted Answer

The software components (classes)are required to provide at least the following interface service or abilities: a.Rules to ensure consistency in writing interfaces. b.An event handling model c.Persistence d.Introspection e.Builder support

Question 2

The sleep method of the Thread class requires one formal parameter that represents the number of:&#10;(a)nanoseconds&#10;(b)microseconds&#10;(c)picoseconds&#10;(d)milliseconds

Accepted Answer

The sleep method of the Thread class requires the number of milliseconds as its formal parameter. The method suspends the execution of the current thread for the specified amount of time in milliseconds. Therefore, the best choice is D - milliseconds.

Question 3

____________ is an enhancement of simple accessor and mutator methods.&#10;(a)Event handling&#10;(b)Introspection&#10;(c)Persistence&#10;(d)None of the above

Accepted Answer

Introspection is a way to obtain information about an object's attributes and methods at runtime. It goes beyond simple accessor and mutator methods, allowing for more advanced analysis and manipulation of an object's properties. Event handling and persistence are also important concepts in programming but are not directly related to enhancing accessor and mutator methods.

Question 4

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

Accepted Answer

The answer of What other programming technique can be combined...

Question 5

The Java library that supports database connectivity is called:&#10;(a)ODBC&#10;(b)CDBC&#10;(c)MDBC&#10;(d)JDBC

Accepted Answer

JDBC (Java Database Connectivity) is a Java library that provides a standard API for connectivity between Java programming language and different databases. It allows Java programs to execute SQL statements and interact with any SQL-compliant database.

Question 6

____________ refers to a framework that facilitates software building by connecting software components from diverse sources.&#10;(a)JavaBeans&#10;(b)Threads&#10;(c)SQL&#10;(d)all of the above

Accepted Answer

JavaBeans is a framework that facilitates software building by connecting software components from diverse sources. Threads and SQL are not related to this framework.

Question 7

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

Accepted Answer

When start() method is called on a thread object, it creates a new thread and invokes the run() method on the newly created thread.

Question 8

____________ means that an object has an identity that extends beyond one session.&#10;(a)Event handling&#10;(b)Introspection&#10;(c)Persistence&#10;(d)None of the above

Accepted Answer

Persistence refers to the ability of an object to maintain its state between different sessions or invocations of the program. This means that the object's identity extends beyond a single session, making it persistent. Event handling refers to the way a program responds to user actions or other events, while introspection is the ability of a program to examine its own structure at runtime. Neither of these options specifically addresses the idea of persistence.

Question 9

An InterruptedException is a checked exception.

Accepted Answer

InterruptedException is a checked exception in Java, which means that it must be either handled using a try-catch block or declared in the method signature using the "throws" keyword.

Question 10

The programming statements used to accomplish a threads task should be included in the method:&#10;(a)start()&#10;(b)init()&#10;(c)run()&#10;(d)none of the above

Accepted Answer

The run() method is the method where the programming statements for the thread's task should be included. This method is automatically called when the thread is started using the start() method. The init() method is part of the applet framework and is used to initialize the applet's variables. Therefore, the correct choice is C.

Question 11

The Java language does not support multithreading.

Accepted Answer

The answer of The Java language does not support multithreading....

Question 12

What are Enterprise JavaBeans?

Accepted Answer

The answer of What are Enterprise JavaBeans?...

Question 13

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

Accepted Answer

The answer of An alternative to deriving a thread from...

Question 14

What method in the Thread class is responsible for pausing a thread for a specific amount of milliseconds?&#10;(a)pause()&#10;(b)sleep()&#10;(c)hang()&#10;(d)kill()

Accepted Answer

The answer of What method in the Thread class is...

Question 15

SQL stands for Structured Query Language.

Accepted Answer

The answer of SQL stands for Structured Query Language....

Question 16

Java's Thread class is in the ____________ package.&#10;(a)java.util&#10;(b)java.thread&#10;(c)java.lang&#10;(d)javax.swing

Accepted Answer

The answer of Java's Thread class is in the ____________...

Question 17

Threads execute in a ___________ fashion.&#10;(a)parallel&#10;(b)serial&#10;(c)complex&#10;(d)none of the above

Accepted Answer

The answer of Threads execute in a ___________ fashion.&#10;(a)parallel&#10;(b)serial&#10;(c)complex&#10;(d)none of...

Question 18

What is a JavaBean?

Accepted Answer

The answer of What is a JavaBean?...

Deck 19: Java Never Ends