MCA 4030 - PROGRAMMING IN JAVA

DRIVE FALL	2013
PROGRAM	MCA
SUBJECT CODE AND NAME	MCA 4030 -  PROGRAMMING IN JAVA
SEMESTER	4
BOOK ID	B1477
CREDITS	4
MARKS	60

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Q.1. What is Java Development Kit (JDK)? Give list of all tools available for JDK with their description.

Ans :  A Java Development Kit (JDK) is a program development environment for writing Java applets and applications. It consists of a runtime environment that "sits on top" of the operating layer as well as the tools and programming that developers need to compile, debug, and run applets and applications written in the Java language.

People new to Java may be confused about whether to use the JRE or the JDK. To run Java applications and applets, simply download the JRE. However, to develop Java applications and applets as well as run them, the

Q.2 What Are Operators? Explain three kinds of Operators.

Ans : Java provides a rich set of operators to manipulate variables. We can divide all the Java operators into the following groups:

·         Arithmetic Operators

·         Relational Operators

·         Bitwise Operators

·         Logical Operators

·         Assignment Operators

·         Misc Operators

Q.3 What is an Exception? What are the common exceptions in JAVA? Explain the keywords used for exception-handlings with the help of an example.

Ans :  An exception is a problem that arises during the execution of a program. An exception can occur for many different reasons, including the following:

·         A user has entered invalid data.

·         A file that needs to be opened cannot be found.

·         A network connection has been lost in the middle of communications or the JVM has run out of memory.

Some of these exceptions are caused by user error, others by programmer error, and others by physical resources that have failed in some manner.

Q.4 Explain any 10 Packages in Swing Libraries.

Ans :  Swing is the primary Java GUI widget toolkit. It is part of Oracle's Java Foundation Classes (JFC) — an API for providing a graphical user interface (GUI) for Java programs. Swing was developed to provide a more sophisticated set of GUI components than the earlier Abstract Window Toolkit (AWT). Swing provides a native look and feel that emulates the look and feel of several platforms, and also supports a pluggable look and feel that allows applications to have a look and feel unrelated to the underlying platform. It has more powerful and flexible components than

Q.5 Explain the process of Servlet Life Cycle with diagram.

Ans : A servlet is managed through a well defined life cycle that defines how it is loaded and instantiated, is initialized, handles requests from clients, and is taken out of service. This life cycle is expressed in the API by the init, service, and destroy methods of the javax.servlet.Servlet interface that all servlets must implement directly or indirectly through the GenericServlet or HttpServlet abstract classes.

Q. 6 What is Java Data Base Connectivity (JDBC).Explain JDBC Application Architecture with diagram?

Ans : The Java Database Connectivity (JDBC):-

The Java Database Connectivity (JDBC) API is the industry standard for database-independent connectivity between the Java programming language and a wide range of databases – SQL databases and other tabular data sources, such as spreadsheets or flat files. The JDBC API provides a call-level API for SQL-based database access.

The programming involved to establish a JDBC connection is fairly simple. Here are these simple four steps:

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