A(n) ________ is a collection of multiple objects on a presentation slide treated as one unit

Queue nodes are removed only from the __________ of the queue, and are inserted only at the __________ of the queue.

a. tail, tail. b. tail, head. c. head, tail. d. head, head.

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.