How can you declare a one-dimensional array in Visual Basic?
a) Dim arr() As Array
b) Dim arr As Array(1)
c) Dim arr(1) As Integer
d) Dim arr() As Integer
Explanation: To declare a one-dimensional array in Visual Basic, you can use the "Dim" keyword followed by the array name and specify the data type of the array elements within parentheses.
What is the purpose of the "Timer" control in Visual Basic?
a) To display a clock on the form
b) To set the refresh rate of a form
c) To create animations in the form
d) To trigger events at regular intervals
Explanation: The "Timer" control in Visual Basic is used to raise events at specific time intervals, allowing developers to perform actions or execute code periodically.
How do you check if a file exists before attempting to open it in Visual Basic?
a) File.Exists("file.txt")
b) File.Check("file.txt")
c) File.Open("file.txt")
d) File.CheckExists("file.txt")
Explanation: In Visual Basic, you can use the "File.Exists" method to check if a file exists before attempting to open it, which returns a Boolean value indicating whether the file exists or not.
What is the default scope of a variable declared within a procedure in Visual Basic?
a) Public
b) Private
c) Protected
d) Local
Explanation: In Visual Basic, when a variable is declared within a procedure without specifying an access modifier, its default scope is "Local," meaning it is accessible only within that specific procedure.
Which control is used to allow users to select a date from a calendar in Visual Basic?
a) DateControl
b) CalendarPicker
c) DatePicker
d) DateTimePicker
Explanation: The "DateTimePicker" control is used in Visual Basic to allow users to select both date and time or just the date from a calendar, providing a user-friendly interface for date selection.
How can you create a copy of an object in Visual Basic?
a) Using the Clone () method
b) Using the Copy () method
c) Using the Duplicate () method
d) By reassigning the object to a new variable
Explanation: In Visual Basic, you can create a copy of an object using the "Clone ()" method, which creates a new instance of the object with the same values of the original object's properties and fields.
