A DBMS is a(n) ____.

Which type of loop uses a Boolean expression to control the number of times a loop repeats?

a. count-controlled b. condition-controlled c. accumulator d. For

Answer the following statements true (T) or false (F)

1. When the button is clicked, the output of the following program will be ``` Private Sub btnDisplay_Click(...) Handles btnDisplay.Click Dim num As Integer = 20 DoubleIt(num) txtBox.Text = CStr(num) End Sub Sub DoubleIt(ByRef var As Integer) var = var * 2 End Sub ``` 2. The value of an argument in a calling statement can be changed by a Sub procedure only if the same name is used in the Sub procedure's parameter list. 3. Sub procedures can be individually tested before being placed into a program. 4. A value assigned to a variable in one part of a program always affects the value of the like- named variable in the other parts of the program.