DCA3102 VISUAL PROGRAMMING

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Description

SESSION APRIL 2025
PROGRAM BACHELOR OF COMPUTER APPLICATIONS (BCA)
SEMESTER V
COURSE CODE & NAME DCA3102 VISUAL PROGRAMMING
   
   

 

 

SET-I

 

 

Q1. Explain the comparison and logical operators available in VB .NET.          10       

Ans 1.

Comparison and Logical Operators in VB .NET

Operators in VB .NET

Operators in Visual Basic .NET (VB .NET) are essential tools used for manipulating variables and expressions. Among them, comparison operators and logical operators play a significant role in implementing conditional statements and decision-making logic. These operators return Boolean values (True or False) based on the comparison or logic applied to operands.

Comparison

 

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Q2. Discuss the concept of constructor and destructor with appropriate example.        10      

Ans 2.

Object Lifecycle

In Visual Basic .NET (VB .NET), classes are used to define the structure and behavior of objects. When an object is created, it needs to be initialized with default or specific values. Similarly, when an object is no longer needed, its resources should be cleaned up. This process is managed using constructors and destructors (also referred to as finalizers). These are special methods that automate initialization and cleanup tasks, contributing to efficient memory and resource management.

Constructor

 

 

Q3. Explain the .NET architecture and Visual Studio .NET environment.        10       

Ans 3.

.NET Architecture and Visual Studio .NET Environment

.NET Framework

The .NET Framework is a robust software development platform developed by Microsoft that supports building and running applications across desktop, web, and mobile environments. It provides a managed environment for executing code with support for multiple programming languages, including Visual Basic .NET, C#, and F#. The architecture of .NET enables developers to write secure, scalable, and high-performance applications.

Components of .NET

 

SET-II

 

Q4. Discuss the following

(a)  Data  Adapter  (b  )  Dataset    (c)  Overloading    (d) Encapsulation (e) exception handling

Ans 4.

Explanation of Key VB.NET Concepts

(a) Data Adapter

A Data Adapter in VB.NET acts as a bridge between a database and a DataSet. It is part of the ADO.NET architecture and is responsible for retrieving data from a data source and populating the DataSet, as well as updating the data source with changes made in the DataSet. The most common data adapter is SqlDataAdapter, used with SQL Server. The adapter uses SQL commands like SELECT, INSERT,

 

Q5. Explain the role of XML in VB.NET development and its significance in data representation, exchange, and storage.  

Ans 5.

XML

XML (eXtensible Markup Language) is a widely used standard for representing structured data. It is both human-readable and machine-readable, making it suitable for data exchange between different systems and platforms. In VB.NET development, XML plays a crucial role in data storage, configuration, and communication.

XML in Data Representation

XML provides a

 

Q6. Discuss the architecture of Tersus platform.  

Ans 6.

Tersus Platform

The Tersus Platform is a visual programming environment that enables the creation of web and mobile applications without writing traditional code. It allows developers to model applications graphically by dragging and dropping elements, making it suitable for rapid application development (RAD) and accessible to non-programmers.

Overview of Tersus Architecture

Tersus follows a model-driven development (MDD) approach. The platform is built on a layered architecture, with clear separation between the front-end (client), middle-tier (application logic), and back-