Deck 6: The Repetition Structure

Question 1

The For...Next loop is represented in a flowchart by a hexagon.

Answer 1

True

Question 2

A posttest loop structure is always executed at least once.

Answer 2

True

Question 3

The Do...Loop statement cannot be used to code a pretest loop.

Answer 3

False

Question 4

The startvalue in a For...Next loop structure may be omitted.

Question 5

Updating is also called incrementing.

Question 6

An accumulator is a numeric variable used for counting something.

Question 7

A counter is always incremented by a constant value.

Question 8

The stepvalue in a For...Next loop structure must be an integer.

Question 9

The Exit Do statement will cause a premature exit from a Do...Loop structure.

Question 10

The For...Next loop structure is used when the instructions within the loop are to be executed a precise number of times.

Question 11

Every program contains the sequence programming structure.

Question 12

The repetition programming structure is used to make decisions in a program.

Question 13

The Exit For statement is used to exit the For...Next routine when the code is finished executing.

Question 14

In a pretest loop, the evaluation of a condition occurs after the instructions within the loop are processed.

Question 15

In either pretest or posttest loops, the controlling condition is evaluated with each repetition.

Question 16

Of the two loop types, pretest and posttest, the posttest is the more commonly used structure.

Question 17

The process of updating an accumulator or counter is called incrementing.

Question 18

An accumulator is incremented by a value that varies.

Question 19

The Do...Loop statement executes exactly the same whether using the While or the Until clause.

Question 20

The stepvalue in a For...Next loop structure must be positive.

Question 21

Consider the following Visual Basic .NET code: Dim unitsReceived as Integer, totalCost as Single, cost as String totalCost=0 unitsReceived=0 cost = InputBox("Enter item cost (without $ or comma), click Cancel when finished", "Data Entry") Do While cost "" unitsReceived = unitsReceived + 1 totalCost = totalCost + val(cost) cost = InputBox("Enter item cost (without $ or comma), click Cancel when finished", "Data Entry") Loop The above code represents a ____ loop example.

A) posttest
B) firsttest
C) pretest
D) secondarytest

Question 22

The condition used in the Do...Loop statement must evaluate to an Integer value.

Question 23

In the Do...Loop statement, the keyword While indicates that the loop instructions should be processed while the condition is false.

Question 24

Typically, you enter the SelectAll method in a text box control's ____ event.

A) Closing
B) Enter
C) Click
D) Load

Question 25

In a For...Next loop structure, which of the following may be omitted when coding?

A) startvalue
B) endvalue
C) stepvalue
D) counter

Question 26

The first action performed by the For...Next loop structure is to ____.

A) test to determine if the loop is to be performed
B) initialize the counter variable
C) change the counter variable by the stepvalue
D) add the startvalue to the stepvalue

Question 27

A(n) ____ is a numeric variable used for adding together something.

A) counter
B) updater
C) incrementer
D) accumulator

Question 28

A form's ____ event is triggered when a form is about to be closed.

A) Closing
B) Exit
C) ShutDown
D) End

Question 29

When focus is directed to a TextBox that currently has text, the text can be selected with which of the following code?

A) textbox .SelectAll( )
B) textbox .HighlightText()
C) textbox .Select()
D) textbox .Text()

Question 30

If stepvalue is positive, then startvalue must be ____ endvalue for the loop instructions to be processed.

A) less than
B) more than
C) less than or equal to
D) more than or equal to

Question 31

The condition in the Do...Loop statement can contain variables, constants, properties, methods, and operators.

Question 32

You can close a form using the Close button on its title bar.

Question 33

Which statement cancels the closing event triggered by clicking the close button?

A) e.Cancel = True
B) e.Ignore = True
C) e.Cancel = False
D) e.Exit = False

Question 34

A text box control's ____ event occurs when the user tabs to the control, and when the Focus method is used to send the focus to the control.

A) Enter
B) Tab
C) Focus
D) Text

Question 35

In a nested repetition structure, one loop, referred to as the ____ loop, is placed entirely within another loop, called the ____ loop.

A) inner, outer
B) secondary, primary
C) minor, major
D) dependent, independent

Question 36

If the user clicks the Cancel button in a dialog box or the Close button on the dialog box's title bar, the value returned is ____.

A) an empty string
B) a blank character
C) the numeric value zero
D) the numeric value one

Question 37

You can think of the second hand of a clock as being the outer loop and the minute hand as being the inner loop.

Question 38

Consider the following Visual Basic .NET code: Dim unitsReceived as Integer, totalCost as Single, cost as String totalCost=0 unitsReceived=0 cost = InputBox("Enter item cost (without $ or comma), click Cancel when finished", "Data Entry") Do While cost "" unitsReceived = unitsReceived + 1 totalCost = totalCost + val(cost) cost = InputBox("Enter item cost (without $ or comma), click Cancel when finished", "Data Entry") Loop Which instruction represents initialization?

A) totalCost = totalCost + val(cost)
B) unitsReceived=0
C) unitsReceived = unitsReceived + 1
D) cost = InputBox("Enter item cost (without $ or comma), click Cancel when finished", "Data Entry")

Question 39

The symbol used to identify a For...Next loop on a flowchart is the ____ symbol.

A) diamond
B) rectangle
C) hexagon
D) parallelogram

Question 40

The symbol used to represent a loop condition on a flowchart is the ____ symbol.

A) diamond
B) rectangle
C) hexagon
D) parallelogram

Question 41

A ____ structure is referred to as a loop.

A) selection
B) sequence
C) repetition
D) recursion

Question 42

You can close a form using the ____ statement in code.

A) Me.Exit()
B) Me.End()
C) Me.Remove()
D) Me.Close()

Question 43

The Closing procedure can prevent the form from being closed by setting the Cancel property of the procedure's e parameter to ____.

A) True
B) False
C) "Continue"
D) " " (the empty string)

Question 44

Which of the following values or variables can be omitted when coding a For...Next loop?

A) counter
B) endvalue
C) stepvalue
D) beginvalue

Question 45

To leave a Do...Loop structure earlier than its full completion you must execute a(n) ____ statement.

A) End Do
B) Bypass
C) Leave
D) Exit Do

Question 46

According to the following code how many times will the loop be executed? Dim startNum, stopNum, stepNum, num As Integer startNum = 1 stopNum = 8 stepNum = 2 For num = startNum To stopNum Step stepNum . . Next num

A) 1
B) 2
C) 3
D) 4

Question 47

Which of the following loop structures always executes at least once?

A) pretest
B) posttest
C) top-driven
D) selection

Question 48

If the stepvalue is omitted when coding a For...Next statement, at execution time the stepvalue is ____.

A) -1
B) 0
C) 0.1
D) 1

Question 49

According to the following code when the loop terminates what value is in num? Dim startNum, stopNum, stepNum, num As Integer startNum = 1 stopNum = 8 stepNum = 2 For num = startNum To stopNum Step stepNum . . Next num

A) 5
B) 7
C) 8
D) 9

Question 50

The loop created by the For...Next statement is a ____ loop.

A) posttest
B) pretest
C) selection
D) sequential