What is the purpose of the "Split" function in Visual Basic?
a) To divide a string into substrings based on a delimiter
b) To split a form into multiple sections
c) To separate numbers from strings in an expression
d) To divide an array into multiple smaller arrays
Explanation: The "Split" function in Visual Basic is used to split a string into an array of substrings based on a specified delimiter, making it easier to extract and manipulate individual elements of the original string.
Which property is used to determine the current index of a selected item in a ComboBox control in Visual Basic?
a) Index
b) SelectedIndex
c) CurrentIndex
d) SelectedItem
Explanation: The "SelectedIndex" property in Visual Basic is used to determine the current index of the selected item in a ComboBox control, allowing developers to access and work with the selected item's position in the list.
How can you execute a block of code repeatedly while a certain condition is true in Visual Basic?
a) Using the Repeat-Until loop
b) Using the For loop
c) Using the While loop
d) Using the Do-While loop
Explanation: In Visual Basic, you can execute a block of code repeatedly while a certain condition is true using the "While" loop, which checks the condition before each iteration. If the condition is true, the loop continues; otherwise, it exits.
What is the purpose of the "IsNumeric" function in Visual Basic?
a) To check if a variable is of numeric data type
b) To convert a string into a numeric data type
c) To determine if a string can be converted to a number
d) To perform arithmetic operations on numeric variables
Explanation: The "IsNumeric" function in Visual Basic is used to check if a given string contains a valid numeric value that can be converted into a number, helping to avoid errors during string-to-number conversions.
Which control is used to allow users to select multiple items from
a list in Visual Basic?
a) CheckBoxList
b) ListBox
c) CheckedListBox
d) MultiSelectListBox
Explanation: The "CheckedListBox" control in Visual Basic is used to allow users to select multiple items from a list by placing checkmarks next to the items, making it suitable for handling multiple selections in a user-friendly manner.
In Visual Basic, which property is used to set the background color of a control or form?
a) BackColor
b) BackgroundColor
c) Color
d) Background
Explanation: The "BackColor" property is used in Visual Basic to set the background color of a control or form, allowing developers to customize the appearance of the user interface.
