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Visual Basic (VB) .net Quiz

Description: Visual Basic (VB) .net Quiz
Number of Questions: 10
Created by:
Tags: .net vb
Attempted 0/10 Correct 0 Score 0
  1. Checked

  2. CheckedChanged

  3. Selected

  4. SelectedChanged

  5. SelectionChanged


Correct Option: B
Explanation:

To determine which event is activated when a RadioButton is selected, you need to understand the event model of the programming framework or language you are working with. In this case, assuming you are referring to a common event model, such as the one used in Microsoft's .NET framework, the answer would be B. CheckedChanged.

In most event-driven programming frameworks, a RadioButton control has a "Checked" property that represents its checked state. When the user selects or deselects a RadioButton, the Checked property changes, triggering the CheckedChanged event. This event is specifically designed to handle the change in the checked state of a RadioButton.

Therefore, the answer is:

B. CheckedChanged

  1. Event

  2. Function

  3. Sub

  4. Both a and b.

  5. All of the above.


Correct Option: E
Explanation:

To answer this question, the user needs to have some basic knowledge of VB.Net programming language and its concepts.

The answer is E. All of the above.

Explanation:

In VB.Net, there are two types of procedures: Functions and Subs. Both Functions and Subs are used to group a set of statements that perform a specific task.

Functions are procedures that return a value after performing a specific task. Functions are defined using the "Function" keyword.

Subs are procedures that do not return a value after performing a specific task. Subs are defined using the "Sub" keyword.

Events are not procedures, but rather they are actions that occur in response to user actions or system events. Events are used to trigger a specific action or set of actions in an application.

Therefore, option D is incorrect because Events are not a type of procedure in VB.Net. Option E is correct because both Functions and Subs are types of procedures found in VB.Net.

The answer is: E. All of the above.

  1. event-driven programming.

  2. functional programming.

  3. granular programming.

  4. modular programming.

  5. procedural programming.


Correct Option: D
Explanation:

To solve this question, the user should be familiar with different programming methodologies and their characteristics. The user should be able to identify the methodology where code is broken into small, logical procedures.

Option A: Event-driven programming is a programming paradigm where the flow of the program is determined by events such as user actions (clicking a button), sensor outputs, or messages from other programs/threads. This option is incorrect because it is not the methodology where code is broken into small, logical procedures.

Option B: Functional programming is a programming paradigm where programs are constructed by applying and composing functions. This option is incorrect because it is not the methodology where code is broken into small, logical procedures.

Option C: Granular programming is not a widely recognized methodology in programming. This option is incorrect.

Option D: Modular programming is a methodology where code is broken down into independent, interchangeable modules that can be used in different parts of the program. This option is the correct answer.

Option E: Procedural programming is a programming paradigm where the program is structured around procedures, or subroutines, that perform specific tasks. This option is similar to option D but does not emphasize the independence and interchangeability of the modules.

Therefore, the answer is: D. modular programming.

  1. actual argument to the formal parameter of the procedure.

  2. formal argument to the actual parameter of the procedure.

  3. actual parameter to the formal argument of the procedure.

  4. formal parameter to the actual argument of the procedure.

  5. All of the above.


Correct Option: A
Explanation:

To understand the question, the user needs to know about procedures and the concepts of formal and actual parameters.

When a procedure is called, data is passed from the calling code to the procedure. This data is referred to as the argument of the procedure, and can be either a value or a variable. The calling code specifies the argument by providing a value or a variable name.

Formal parameters are the parameter names declared in the procedure header, while actual parameters are the arguments passed to the procedure during the call.

Now, let's go through each option and explain why it is right or wrong:

A. actual argument to the formal parameter of the procedure.

This option is correct. The actual argument is the value or variable passed to the procedure during the call. It is assigned to the formal parameter, which is the parameter name declared in the procedure header.

B. formal argument to the actual parameter of the procedure.

This option is incorrect. The formal argument is not a commonly used term in programming. The parameter name declared in the procedure header is called the formal parameter, not the formal argument.

C. actual parameter to the formal argument of the procedure.

This option is incorrect. The actual parameter is the argument passed to the procedure during the call, while the formal argument is not a commonly used term in programming.

D. formal parameter to the actual argument of the procedure.

This option is incorrect. The formal parameter is the parameter name declared in the procedure header, while the actual argument is the value or variable passed to the procedure during the call.

E. All of the above.

This option is incorrect. Only option A is correct.

Therefore, the answer is: A. actual argument to the formal parameter of the procedure.

  1. 1

  2. 2

  3. 3

  4. As many times as needed.


Correct Option: D
Explanation:

To answer this question, the user needs to understand what a procedure is and how it is called in a program. In general, a procedure is a block of code that performs a specific task and can be called from other parts of the program where that task needs to be performed.

Now, let's go through each option and explain why it is right or wrong:

A. 1: This option is incorrect. A procedure can be called from multiple places in the code. If a procedure is designed to perform a specific task, it can be called from different parts of the code where that task is needed.

B. 2: This option is incorrect. A procedure can be called from more than two places in the code. It all depends on how the procedure is designed and how many times that specific task needs to be performed in the program.

C. 3: This option is incorrect. A procedure can be called from more than three places in the code. There is no set limit on how many times a procedure can be called. It all depends on the needs of the program and how many times that specific task needs to be performed.

D. As many times as needed: This option is correct. A procedure can be called as many times as it is needed in the program. There is no set limit on the number of times a procedure can be called. It all depends on the needs of the program and how many times a specific task needs to be performed.

Therefore, the correct answer is:

The Answer is: D

  1. e

  2. Sender

  3. Receiver

  4. Both a and b.

  5. All of the above.


Correct Option: E
Explanation:

An event procedure is a block of code that is executed in response to an event, such as a button click or a form load. When an event is triggered, the event procedure is called and passed certain parameters that provide information about the event.

The parameters that are found in an event procedure may vary depending on the programming language or platform being used, but they generally include the following:

A. e - This parameter represents the event arguments, which provide information about the event that was raised. It may include properties such as the name of the control that raised the event, the type of event, and any additional data associated with the event.

B. Sender - This parameter represents the object that raised the event. It is typically used to identify the control or component that triggered the event.

C. Receiver - This parameter is not commonly found in event procedures, but it may refer to the object or component that is listening for the event.

Therefore, the correct answer is E, all of the above. Both parameter e and Sender are commonly found in event procedures, and in some cases, Receiver may also be present.

Which is an optional element of an event procedure?

  1. End Sub

  2. Handles

  3. Object_Event

  4. Statements

  5. Sub


Correct Option: D
Explanation:

An event procedure is a subroutine that is called in response to an event. The event procedure is defined using the Sub keyword, followed by the name of the event procedure, the Handles keyword, and the name of the event. The event procedure can contain any number of statements.

The End Sub keyword is not optional, as it marks the end of the event procedure. The Handles keyword is also not optional, as it specifies the event that will trigger the event procedure. The Object_Event identifier is optional, and it can be used to specify the object and event that will trigger the event procedure. The Statements are optional, as the event procedure can be empty.

Correct Option: D. Statements

The Statements element is optional in an event procedure. The event procedure can be empty, or it can contain any number of statements. The statements in the event procedure will be executed when the event is triggered.

Here is an example of an event procedure:

Sub btnClick(sender As Object, e As EventArgs)
'This is an event procedure that is triggered when the button is clicked.
'The event procedure contains two statements.

MsgBox("The button was clicked!")
End Sub

As you can see, the event procedure contains two statements. The first statement displays a message box, and the second statement ends the event procedure.

  1. Only arguments of numeric data types are allowed.

  2. A reference to the argument is sent to the procedure.

  3. A copy of the argument is sent to the procedure.

  4. Both a and b.

  5. All of the above.


Correct Option: C
Explanation:

To understand what happens when a parameter in a procedure is declared ByVal, the user needs to have knowledge of programming concepts and specifically the concept of passing arguments to procedures.

When a parameter is declared ByVal, it means that a copy of the argument is sent to the procedure. This means that any changes made to the parameter inside the procedure will not affect the original argument in the calling code.

Now, let's go through each option and explain why it is right or wrong:

A. Only arguments of numeric data types are allowed: This option is incorrect. When a parameter is declared ByVal, it is not restricted to only numeric data types. It can be used with arguments of any data type.

B. A reference to the argument is sent to the procedure: This option is incorrect. When a parameter is declared ByVal, a reference to the argument is not sent. Instead, a copy of the argument is sent to the procedure.

C. A copy of the argument is sent to the procedure: This option is correct. When a parameter is declared ByVal, a copy of the argument is sent to the procedure. This means that any changes made to the parameter inside the procedure will not affect the original argument in the calling code.

D. Both a and b: This option is incorrect. Option a is incorrect because arguments of any data type are allowed, not just numeric data types. Option b is incorrect because a reference to the argument is not sent when the parameter is declared ByVal.

E. All of the above: This option is incorrect. Option a is incorrect, and option b is incorrect. Only option c is correct.

Therefore, the correct answer is:

The Answer is: C

Which is a valid way to write the procedure stub for an object’s default event?

  1. Use the Class and Method combo boxes in the Code Editor window.

  2. Double click on the object in the Form Designer window.

  3. Type the procedure declaration in the Code Editor window.

  4. Both a and b.

  5. All of the above.


Correct Option: D
Explanation:

To answer this question, you need to understand what is a procedure stub and what is an object's default event in VB.Net. A procedure stub is a skeleton code that defines the name, parameters, and return type of a procedure, but does not contain any executable statements. An object's default event is the event that is triggered when the user interacts with the object in a common way, such as clicking a button or selecting an item from a list. For example, the default event for a button is the Click event, and the default event for a list box is the SelectedIndexChanged event.

Let's go through each option to understand why it is correct or incorrect:

Option A) Use the Class and Method combo boxes in the Code Editor window. - This option is correct because you can use the Class and Method combo boxes in the Code Editor window to select an object and its default event, and then Visual Studio will automatically generate a procedure stub for you. For example, if you select Button1 and Click from the combo boxes, Visual Studio will create a procedure stub like this:

Private Sub Button1_Click(sender As Object, e As EventArgs) Handles Button1.Click

End Sub

Option B) Double click on the object in the Form Designer window. - This option is correct because you can also double click on an object in the Form Designer window to create a procedure stub for its default event. Visual Studio will open the Code Editor window and generate a procedure stub similar to option A.

Option C) Type the procedure declaration in the Code Editor window. - This option is incorrect because typing the procedure declaration in the Code Editor window is not enough to create a procedure stub for an object's default event. You also need to specify which object and event the procedure handles using the Handles keyword. For example, if you type this:

Private Sub Button1_Click(sender As Object, e As EventArgs)

End Sub

You still need to add Handles Button1.Click at the end of the declaration to make it a valid procedure stub.

Option D) Both a and b. - This option is correct because both options A and B are valid ways to write a procedure stub for an object's default event.

Option E) All of the above. - This option is incorrect because it includes option C, which is not a valid way to write a procedure stub for an object's default event.

The correct answer is D. This option is correct because both options A and B are valid ways to write a procedure stub for an object's default event.

  1. makes code easier to maintain.

  2. splits the logic to solve a problem into small, manageable units.

  3. limits the number of times the code can be accessed.

  4. Both a and b.

  5. All of the above.


Correct Option: D
Explanation:

To solve this question, the user needs to have knowledge of programming concepts and the purpose of sub procedures.

A sub procedure, also known as a subroutine or function, is a block of code that performs a specific task or set of tasks within a larger program. It is called by the main program and helps in organizing and modularizing the code.

Now, let's go through each option and explain why it is right or wrong:

A. makes code easier to maintain: This option is correct. By using sub procedures, the code is divided into smaller units, making it easier to understand, debug, and maintain. Changes or updates can be made to a specific sub procedure without affecting the entire code.

B. splits the logic to solve a problem into small, manageable units: This option is correct. Sub procedures help in breaking down complex problems into smaller, more manageable tasks. Each sub procedure focuses on solving a specific part of the problem, making the overall logic easier to understand and implement.

C. limits the number of times the code can be accessed: This option is incorrect. Sub procedures do not limit the number of times the code can be accessed. They can be called multiple times from different parts of the program as needed.

D. Both a and b: This option is correct. Both options A and B are correct, as explained above. Sub procedures make code easier to maintain and split the logic into small, manageable units.

E. All of the above: This option is incorrect. Option C is incorrect because it does not accurately describe the purpose or benefit of sub procedures. Sub procedures do not limit the number of times the code can be accessed.

Therefore, the correct answer is:

D. Both a and b.

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