CLASS 8: LESSON 07 VISUAL BASIC COMMUNITY

CLASS 8: LESSON 07 VISUAL BASIC COMMUNITY

Section A

A.      Fill in the Blanks

1.       BASIC

2.       EVENTS

3.       VARIABLE

4.       CODE

5.       OPERATORS

6.       F5

B.      State true/false

1.       T

2.       F

3.       F

4.       T

5.       F

6.       T

C.      Application based

a.       She can use the msgbox control or a Label to display the message on the screen.

b.      Dim Variable Name as Data Type

Section B

A.      Multiple Choice Questions:

1.       A. Visible

2.       A. Design Mode

3.       C. Solution Explorer

4.       B. Max Length

5.       A. Integer

6.       C. .VB

B.      Answer the following:

1.       A Text Box is used to receive input from the user whereas a Label is used to display some text on the screen.

2.       Operators are special symbols used to perform calculations, make comparisons and check logical conditions in a program.

Operators can be divided into three categories:

a. Arithmetic Operators: It includes basic arithmetic operations like addition, subtraction, multiplication, division, modulus operations, increment, and decrement.

b.Relational Operators: It is used to compare two numbers by checking whether they are equal or not, less than, less than or equal to, greater than, greater than or equal to.

c. Logical Operator: It refers to the Boolean values which can be expressed as: Binary logical operations, which involves two variables: AND and OR. & Unary logical operation: NOT

3.       Dim statement is used to declare a variable in Visual basic.

Syntax: Dim Variable name As Data Type

For Example: The Dim Radius As Integer will create a variable named as Radius to store the integer value.

4.       Properties window is used to set the properties of forms and other controls placed in them. The properties window consists of an object drop down list and a list of properties. The bottom section of the properties window shows a description of the selected property.

5.       Event-driven programming is currently the default paradigm in software engineering. As the name suggests, it uses events as the basis for developing the software. These events can be something the users are doing — clicking on a specific button, picking an option from drop-down, typing text into a field, giving voice commands, or uploading a video — or system-generated events such as a program loading. The central idea of event-driven programming is that the application is designed to react.

6.       Declaring a variable means reserving the memory space for it. it is not required to declare a variable before using it. Whenever Visual Basic encounters a new variable it assigns the default variable type and value to it. This is called implicit declaration. Although this type of declaration is easier for the  user as it gives control over the variables yet it is advisable to declare them explicitly, which is called explicit declaration.

C.      Identify the controls:

a.  Text Box

b.Label

c. Picture Box

d.Pointer