True/False
Indicate whether the
statement is true or false.
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1.
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A repetition structure can be either a pretest loop or a posttest loop.
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2.
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The difference between pretest and posttest loops pertains to how the
accumulator is evaluated.
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3.
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The instructions in a pretest loop will be processed at least once.
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4.
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Most programmers use posttest loops.
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5.
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A pretest loop is easier to write and understand than a posttest loop with a
selection structure.
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6.
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The Do…Loop statement can be used to code a pretest loop as well as a
posttest loop.
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7.
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In the pretest syntax, the condition is evaluated after the loop instructions
are processed.
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8.
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In the posttest syntax, the condition is evaluated before the loop instructions
are processed.
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9.
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In the posttest syntax, the only purpose of the Do clause is to mark the
beginning of the loop.
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10.
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The repetition diamond appears at the top of the loop in the flowchart of a
posttest loop.
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11.
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When concatenating strings, you must be sure to include a space before and after
the ampersand; otherwise, the Code Editor will not recognize the ampersand as the concatenation
operator.
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12.
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The ControlChars.NewLine constant is used to create a new line.
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13.
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A counter loop can be either a pretest loop or a posttest loop.
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14.
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A pretest counter loop can only be coded using the Do…Loop
statement.
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15.
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The For...Next statement provides the most convenient way to code a posttest
counter loop.
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16.
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You do not need to specify the counter variable’s name in the Next clause,
but doing so is highly recommended because it makes your code more self-documenting.
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17.
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When you declare a variable in the For clause, the variable stays in the
computer’s internal memory when the loop ends.
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18.
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You can declare the counter variable in a Dim statement, as long as the Dim
statement appears somewhere after the For…Next statement.
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19.
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The My.Computer object provides access to other objects, such as your
computer’s Audio object.
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20.
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To have the Audio object play an audio file, you use its Sound method.
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21.
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If the audio file is not in the project’s bin\Debug folder, you will need
to include the path to the file in the fileName argument.
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22.
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With the negation operator, a positive number preceded by the negation operator
remains a positive number.
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23.
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The mathematical formula for calculating a periodic payment on a loan is rather
complex, so Visual Basic provides a method that performs the calculation for you.
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24.
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In the Financial.Pmt method, if Rate is a monthly interest rate, then NPer must
specify the number of monthly payments.
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Multiple Choice
Identify the
choice that best completes the statement or answers the question.
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25.
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The ____ loop condition is evaluated before the instructions within the loop are
processed.
a. | posttest | c. | before | b. | pretest | d. | after |
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26.
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The ____ loop condition is evaluated after the instructions within the loop are
processed.
a. | posttest | c. | before | b. | pretest | d. | after |
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27.
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The instructions in a posttest loop ____.
a. | may never be processed | c. | always will be processed at least twice | b. | should only be
processed once | d. | always will
be processed at least once |
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28.
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In the ____ loop, the condition appears in the first line.
a. | sequential | c. | posttest | b. | pretest | d. | iterative |
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29.
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In the ____ loop, the condition appears in the last line.
a. | sequential | c. | posttest | b. | pretest | d. | iterative |
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30.
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____ loops should be used only when their instructions must be processed at
least once.
a. | Posttest | c. | DoAfter | b. | Pretest | d. | ProcessAfter |
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31.
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In the pretest syntax for a Do…Loop statement, the {While | Until} condition section is part of the ____ clause.
a. | Execute | c. | Do | b. | Process | d. | Loop |
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32.
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In the posttest syntax for a Do…Loop, the {While |
Until} condition section is part of the ____ clause.
a. | Execute | c. | Do | b. | Process | d. | Loop |
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33.
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You are given the following statement and conditions:
Do
Until intCounter > intNumTimes, where intCounter=1, there is an
increment of one inside the loop body, and intNumTimes = 5.
The loop
condition would be tested exactly _____ times.
a. | five | c. | seven | b. | six | d. | eight |
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34.
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One problem with posttest loops is that they always execute at least once. You
can fix the problem in the Posttest Loop button’s code by placing the posttest loop in a(n)
____ structure.
a. | selection | c. | iterative | b. | execute | d. | another posttest
loop |
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35.
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You use the ____ operator to connect or link strings together.
a. | addition | c. | join | b. | concatenation | d. | multiplication |
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36.
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The concatenation operator is the ____.
a. | forward slash (/) | c. | asterisk (*) | b. | plus sign (+) | d. | ampersand
(&) |
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37.
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The ____ constant represents the Enter key on your keyboard.
a. | EnterKey | c. | ControlChars.NewLine | b. | NewLine.ControlChars | d. | Control.NewLine |
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38.
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A loop whose instructions you want processed a precise number of times is often
referred to as a ____ loop.
a. | conditional | c. | counter | b. | precision | d. | sequential |
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39.
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A counter loop uses a counter ____ to keep track of the number of times the loop
instructions are processed.
a. | variable | c. | condition | b. | constant | d. | control |
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40.
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You code a posttest counter loop using the ____ statement.
a. | Execute…Until | c. | For…Next | b. | Do...Loop | d. | Do…Counter |
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41.
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The counter variable must be a(n) ____ variable.
a. | iterative | c. | alphanumeric | b. | alpha | d. | numeric |
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42.
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You can use the ____ portion of the For clause to declare the counter
variable.
a. | As dataType | c. | Dim As dataType | b. | dataType | d. | Dim dataType |
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43.
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When you declare a variable in the For clause, the variable has ____ scope and
can be used only within the For...Next loop.
a. | program | c. | solution | b. | block | d. | method |
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44.
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When a variable is declared in a(n) ____ statement at the beginning of a
procedure, it has procedure scope and can be used by the entire procedure.
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45.
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Fewer unintentional errors occur in applications when the variables are declared
using the ____ scope needed.
a. | broadest | c. | minimum | b. | most open | d. | maximum |
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46.
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The ____ object refers to your computer.
a. | This.Computer | c. | Computer | b. | My.ComputerObject | d. | My.Computer |
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47.
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To have an application play an audio file while it is running, you use the
syntax ____.
a. | My.Computer.Play(fileName) | c. | My.Computer.Audio.Play(fileName) | b. | Play(filename) | d. | fileName.Play |
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48.
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Visual Basic’s ____ feature is a feature that exposes a set of commonly
used objects to the programmer.
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49.
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The ____ operator reverses the sign of a number.
a. | sign change | c. | sign | b. | change | d. | negation |
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50.
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The ____ method contains a complex mathematical formula for calculating a
periodic payment.
a. | Fincl.Pmt | c. | Fin.Pmt | b. | Financial.Pmt | d. | Fin.Payment |
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