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VB.NET Multiple Choice Questions (MCQs) and Answers

Master VB.NET with Practice MCQs. Explore our curated collection of Multiple Choice Questions. Ideal for placement and interview preparation, our questions range from basic to advanced, ensuring comprehensive coverage of Visual Basic.NET concepts. Begin your placement preparation journey now!

Q1

Q1 What is VB.NET primarily used for?

A

To manage databases

B

To automate web development

C

To build Windows-based applications using the .NET framework

D

To design network architectures

Q2

Q2 Which company developed VB.NET?

A

Google

B

Apple

C

Microsoft

D

IBM

Q3

Q3 Which framework does VB.NET use?

A

Spring Framework

B

Django Framework

C

.NET Framework

D

Flask Framework

Q4

Q4 VB.NET is an example of which type of programming language?

A

Procedural

B

Object-oriented

C

Functional

D

Assembly

Q5

Q5 Which of the following best describes VB.NET?

A

A standalone development tool

B

An extension of Visual Basic with .NET integration

C

A web browser

D

An operating system

Q6

Q6 What type of applications can you build using VB.NET?

A

Windows Forms, Web Applications, and Console Applications

B

Machine Learning Models

C

Operating Systems

D

Networking Protocols

Q7

Q7 What is the file extension for a VB.NET source file?

A

.vb

B

.net

C

.vbn

D

.cs

Q8

Q8 Which of the following is the correct syntax for printing 'Hello, World!' in VB.NET?

A

print('Hello, World!')

B

Console.WriteLine('Hello, World!')

C

echo 'Hello, World!'

D

System.out.println('Hello, World!')

Q9

Q9 A VB.NET program throws a syntax error. What is the most likely cause?

A

Misspelled keyword

B

Uninitialized variable

C

Unreachable code

D

Division by zero

Q10

Q10 What is the primary purpose of the VB.NET IDE?

A

Debugging applications

B

Managing databases

C

Developing and maintaining VB.NET applications

D

Designing network protocols

Q11

Q11 What is the default IDE for VB.NET development?

A

NetBeans

B

Visual Studio

C

Eclipse

D

IntelliJ IDEA

Q12

Q12 What does the Solution Explorer in Visual Studio display?

A

Errors in code

B

Project structure and files

C

Installed plugins

D

Application runtime logs

Q13

Q13 What is the function of the Toolbox in Visual Studio?

A

Compile code

B

Provide debugging tools

C

Offer reusable controls and components

D

View error logs

Q14

Q14 What is the primary role of the Common Language Runtime (CLR) in VB.NET?

A

To manage runtime exceptions

B

To compile VB.NET code into native code

C

To handle syntax errors

D

To design UI elements

Q15

Q15 Which feature of VB.NET architecture enables code to run on multiple platforms?

A

Just-In-Time (JIT) Compilation

B

Common Intermediate Language (CIL)

C

Garbage Collection

D

Assemblies

Q16

Q16 What is the role of assemblies in VB.NET?

A

They store data about system architecture

B

They are compiled units of .NET code

C

They provide database schemas

D

They are runtime exceptions

Q17

Q17 What is the correct code to add a reference to a library in VB.NET?

A

Import LibraryName

B

#include "LibraryName"

C

using LibraryName

D

Add-Library "LibraryName"

Q18

Q18 While debugging a VB.NET program, how can you set a breakpoint in Visual Studio?

A

Double-click in the Output Window

B

Right-click in the Solution Explorer

C

Click in the margin next to the line of code

D

Type 'breakpoint' in the code

Q19

Q19 Which Visual Studio window allows you to monitor variable values during debugging?

A

Error List

B

Call Stack

C

Immediate Window

D

Watch Window

Q20

Q20 What is the keyword used to declare a variable in VB.NET?

A

Dim

B

Declare

C

Var

D

Let

Q21

Q21 What is the default value of an uninitialized integer variable in VB.NET?

A

0

B

1

C

Null

D

Undefined

Q22

Q22 Which keyword is used to define a constant in VB.NET?

A

Const

B

Static

C

Readonly

D

Final

Q23

Q23 What data type is used to store true/false values in VB.NET?

A

Boolean

B

Integer

C

String

D

Char

Q24

Q24 What is the difference between "Dim" and "Static" in VB.NET?

A

Dim variables retain values across calls

B

Static variables retain values across calls

C

Both retain values across calls

D

Neither retain values across calls

Q25

Q25 What is the significance of Option Explicit in VB.NET?

A

Allows variable declarations

B

Enforces variable type declaration

C

Prevents runtime errors

D

Improves performance

Q26

Q26 Which of the following is a valid way to declare and initialize a variable in VB.NET?

A

Dim x As Integer = 10

B

int x = 10

C

Dim x : x = 10

D

Dim x : x <- 10

Q27

Q27 What is the output of the following code?
Dim x As String = "5" + "5" Console.WriteLine(x)

A

55

B

10

C

Error

D

Undefined

Q28

Q28 What is the error when you try to use a variable before declaring it in VB.NET with Option Explicit On?

A

Syntax Error

B

Runtime Error

C

Logical Error

D

No Error

Q29

Q29 A variable in VB.NET has an incorrect data type assigned at runtime. What type of error is this?

A

Compile-time error

B

Runtime error

C

Syntax error

D

Logical error

Q30

Q30 When debugging, how can you identify the data type of a variable in Visual Studio?

A

Use the Debug console

B

Check the Properties window

C

Hover over the variable

D

All of the above

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