MCA 4030 - PROGRAMMING IN JAVA

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ASSIGNMENT

PROGRAM	BCA(REVISED FALL 2012)
SEMESTER	4
SUBJECT CODE & NAME	MCA 4030 - PROGRAMMING IN JAVA
CREDIT	4
BK ID	B1477
MAX.MARKS	60

Note: Answer all questions. Kindly note that answers for 10 marks questions should be approximately of 400 words. Each question is followed by evaluation scheme.

1 Describe about JDK. List and explain any five tools available in JDK.

Answer : The Java Development Kit (JDK) is an implementation of either one of the Java SE, Java EE or Java ME platforms[1] released by Oracle Corporation in the form of a binary product aimed at Java developers on Solaris, Linux, Mac OS X or Windows. The JDK includes a private JVM and a few other resources to finish the recipe to a Java Application.[2] Since the introduction of the Java platform, it has been by far the most widely used Software Development Kit (SDK).[citation needed] On 17 November 2006, Sun announced that it would be released under the GNU General Public License (GPL), thus making it free software.

2 Differentiate Break and Continue statements in Java with example program.

Answer : A break statement when applied to a loop ends the statement. A continue statement ends the iteration of the current loop and returns the control to the loop statement. If the break keyword is followed by an identifier that is the label of a random enclosing statement, execution transfers out of that enclosing statement. If the continue keyword is followed by an identifier that is the label of an enclosing loop, execution skips to the end of that loop instead.

break: breaks the current loop and moves the cursor

3 Differentiate between packages and Interfaces.

Answer : Packages

Definition:  A package is a grouping of related types providing access protection and name space management. Note that types refers to classes, interfaces, enumerations, and annotation types. Enumerations and annotation types are special kinds of classes and interfaces, respectively, so types are often referred to in this lesson simply as classes and interfaces.

Creating a Package:

To create a package, you choose a name for the package and put a package statement with that name at the top of every source file that

4 What are Applets? What are the restrictions of Applets? Describe about applet class.

Answer : What is an Applet in Java ?

An Applet is a small java program that runs in a Java enabled web browser. Java Applet is a small piece of java code that is embedded into HTML page, which gets executed when the HTML page loads into the browser.Applets provide powerful client-side functionality. As applets are loaded from remote machines and executed on client-side, there are various security restrictions on applets. –

Applets Restrictions

Applets have many restrictions over the areas of

5 Compare JDBC and ODBC

Answer : Typically, software applications are written in a specific programming language (such as Java, C#, etc.), while databases accept queries in some other database specific language (such as SQL). Therefore, when a software application needs to access data in a database, an interface that can translate languages to each other (application and database) is required. Otherwise, application programmers need to learn and incorporate database specific languages within their applications. ODBC (Open Database Connectivity) and JDBC (Java DatabBase Connectivity) are two interfaces that solve this specific problem. ODBC is a platform, language and operating system independent interface that can be used for this purpose. S

6 Describe about Java Beans and BeanBox.

Answer : A Java Bean is a reusable software component that can be manipulated visually in an application builder tool.  The idea is that one can start with a collection of such components, and quickly wire them together to form complex programs without actually writing any new code.

Software components must, in general, adopt standard techniques for interacting with the rest of the world.  For example, all GUI components inherit the java.awt.Component class, which means that one can rely on them to have certain standard methods like paint(), setSize(), etc.  Java Beans are not actually required to inherit a particular

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