DCA2106 JAVA PROGRAMMNING JAN FEB 2026

Description

SESSION	JANUARY/FEBRUARY 2026
PROGRAM	BACHELOR OF COMPUTER APPLICATIONS (BCA)
SEMESTER	3
COURSE CODE & NAME	DCA2106 JAVA PROGRAMMNING

 

 

Set – I

 

Q1. List any four major features of Java and briefly explain each

Ans 1.

Java is one of the most widely used programming languages worldwide. It was developed with the help of Sun Microsystems and released in 1995. The popularity of the product is due to a combination of characteristics that make it powerful, portable, and suitable for the creation of a wide range of applications. Four of its most important aspects are highlighted in the following

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JAN-FEB 2026

 

Q2. What is the concept of encapsulation in Java with an example

Ans 2.

Encapsulation

Encapsulation is among the principles that underlie object-oriented programming. It’s the method of grouping the data (variables) and methods that operate on that data in a single entity called classes. In addition, it involves restricting direct access to certain objects and exposing only the information that is required using a defined interface. This safeguards the internal state of an

 

Q3. Discuss the different types of inheritance in Java with suitable example.

Ans 3.

Inheritance

The concept of inheritance is fundamental in Object-Oriented Programming that permits one class to gain the methods and properties of a different class. In Java classes, the one that inherits is known as the parent class or superclass while the class it inherits from it is called the child class or subclass. The concept of inheritance promotes reuse and establishes a natural hierarchical relation between classes. Java offers a range of inheritance, though some are limited

 

Set – II

 

 

Q4. What is a package in Java, and how does it help in organising code.

Ans 4.

Introduction to Packages

A package in Java refers to a namespace in Java that group associated classes, interfaces and sub-packages. It’s basically a folder or directory inside the file system which contains the compiled Java class files. Programmers can use packages to organize their large codebases in a rational and manageable fashion. They’re a crucial aspect of Java’s modular programming. Java

 

 

Q5. What is event handling in Java and why is it important in GUI applications.

Ans 5.

Event Handling

Events handling within Java is the way in which a program detects and responds to actions of users as well as system-generated events. A “event” is any event that the program must react to, like using a mouse, pressing a key at a keyboard, moving the mouse, selecting one of the items from a menu or shutting down a window. In graphical user interface (GUI) applications processing events is the main mechanism used to make applications interactive. Without it in

 

Q6. What is a software framework and how does it differ from a library in Java

Ans 6.

In Java development, libraries and frameworks are instruments that help programmers build applications better by supplying pre-written code. However, they differ fundamentally in how they are used and the direction in which it is controlled in the app. It is essential to know the difference to make the best choice when creating an Java project.

What is a Software Framework?

A framework software is a already-built, semi-complete app structure which provides the