Deck 5: Problem Solving and Control Statements

Question 1

Which of the following headers will cause the body not to execute at least once?

A)For i As Integer = 1 To 10
B)For i As Integer = 1 To 10 Step 2
C)For i As Integer = 10 To 20 Step -1
D)None of the Above

Answer 1

C

Question 2

Counter-controlled repetition requires only a control variable,an initial value for the control variable and an increment or decrement.

Answer 2

False

Question 3

The control variable of the For…Next statement must have its type declared before or at the beginning of the loop.

Answer 3

False

Question 4

Which of the following statements is false?

A)Case statements use the keyword Is to determine whether the controlling expression satisfies a condition.
B)Multiple values can be tested in a Case statement where the values are separated by commas.
C)Multiple values in a range can be tested using the To keyword.
D)None of the above

Question 5

Which of the following will count down from 10 to 1 correctly,with no added or omitted numbers?

A)For i = 10 to 0 Step -1
B)For i = 10 To 1 Step 1
C)For i As Integer = 10 To 1 Step -1
D)For i As Integer = 1 To 10 Step -1

Question 6

A control variable that is declared in a For…Next statement header may not be used outside of the body of the For…Next statement.

Question 7

Counting loops should be controlled with values.

A)Double
B)Integer
C)Char
D)None of the above.

Question 8

Visual Basic's currency formatting code,C,separates a number every three digits with commas and sets the number of decimal places to two.

Question 9

A case can be labeled as to execute in the event that none of the provided cases are equivalent to the controlling expression.

A)General
B)Default
C)Case *
D)Case Else

Question 10

A Case Else must be provided for every Switch statement.

Question 11

A While statement automatically increments a variable that a programmer specifies.

Question 12

For monetary calculations use the data type:

A)Single
B)Double
C)Decimal
D)Integer

Question 13

Which of the following is not a control statement?

A)Do…Loop While
B)While…Do Loop
C)Select…Case
D)For…Next

Question 14

Counting loops should be controlled with whatever data type most closely reflects the operations taking place,whether that is an Integer,Single or Double.

Question 15

Which of the following is not required for counter-controlled repetition?

A)the special value -1 to mark the end of data input
B)initial value of the control variable
C)increment or decrement by which the control variable is modified each time through the loop
D)condition that tests for the final value of the control variable.

Question 16

It is a logic error to have a positive increment in a For…Next loop that is supposed to loop 10 times when the initial value of the control variable is the final value.

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

Question 17

The first line of a For…Next statement sometimes is called the For…Next _________.

A)title
B)header
C)footer
D)description

Question 18

The Visual Basic operator ^ can be used for exponentiation.

Question 19

The optional _________ keyword specifies the increment of the For…Next loop.

A)Increase
B)Increment
C)Step
D)Raise

Question 20

The expression following the keywords Select Case is called the:

A)selection expression
B)variable expression
C)controlling expression
D)case expression

Question 21

The placement of a larger value on the left side of keyword To in a Case statement is a logic error and causes the case to be ignored during program execution.

Question 22

The Do…Loop While repetition statement tests the condition the body of the loop executes.

A)before
B)while
C)after
D)None of the above.

Question 23

The Exit and Continue statements cannot be used in nested repetition statements.

Question 24

The Do…Loop While statement is an example of a:

A)Selection statement
B)Repetition statement
C)Loop statement
D)Sequence statement

Question 25

The Continue statement is used to undo the effects of the Exit statement.

Question 26

Select Case statements do not require the End Select keywords.

Question 27

Infinite loops occur when the loop-continuation condition in a _________ statement never becomes true.

A)While…End While
B)Do…Loop While
C)Do…Loop Until
D)Do While…Loop

Question 28

The Exit statement terminates a program.

Question 29

In a Do…Loop While statement,the loop-continuation condition is tested at the end of the loop.

Question 30

Which of the following statements about the Continue statement is true?

A)The Continue statement is used to exit a repetition statement early and continue execution after the loop.
B)The Continue statement is used to continue after a Select…Case statement.
C)The Continue statement does not alter the flow of control.
D)A Continue statement proceeds with the next iteration of the immediately enclosing repetition statement.

Question 31

Which of the following statements cannot be terminated early?

A)For…Next
B)Do…Loop Until
C)If…Then
D)Select…Case

Question 32

In a Do…Loop Until statement,the loop body is not always executed.

Question 33

The statement,when executed in a loop,terminates the loop.

A)Continue
B)Break
C)Skip
D)Exit

Question 34

Which of the following operators is typically used to ensure at least one out of multiple conditions is true?

A)Or
B)And
C)Xor
D)Not

Question 35

Including an incorrect xe "relational operator"relational operator or an incorrect xe "final value of control variable"final value for a loop counter in the condition of any repetition statement often cause ____________ errors.

A)off-by-one
B)compilation
C)syntax
D)None of the above

Question 36

The loop body of a Do…Loop While statement always executes __________.

A)zero times
B)at least once
C)more than once
D)undeterminable

Question 37

The Exit For statement causes immediate exit from the For…Next statement.

Question 38

In a Do…Loop While statement,the loop body is always executed at least once.

Question 39

Identify the incorrect logical operator:

A)AndAlso
B)ElseOr
C)Xor
D)Not

Question 40

The statement,when executed in a loop,skips the remaining statements in the body of the statement and begins the next iteration of the loop.

A)Continue
B)Break
C)Next
D)Back

Question 41

MessageBox method Show displays a message dialog,which is typically used to display an important message to the user.The arguments of MessageBox method Show are the message String,the String that's displayed in the dialog's title bar and predefined constants that specify the Button(s)and the icon to show on the dialog,respectively.

Question 42

The Xor operator is true if and only if one of its operands results in a true value and the other a false value.

Question 43

Only one CheckBox in a group can be selected at a time.

Question 44

A program waits for a message dialog to be closed before executing the next line of code-this type of dialog is known as a nodal dialog.

Question 45

If we wish to ensure that either or both of two conditions are true we should use the logical operator:

A)And
B)AndAlso
C)OrElse
D)Xor

Question 46

A CheckBox is known as a __________ button because it can be "on" or "off."

A)switch
B)alternating
C)state
D)on/off

Question 47

The performance feature for the evaluation of AndAlso and OrElse expressions is called:

A)short-circuit evaluation
B)quick evaluation
C)shortcut evaluation
D)fast evaluation

Question 48

The logical operator Not is also called logical negation.

Question 49

If a CheckBox is "on" (checked),its __________ property is True;otherwise,it's False ("off").

A)Selected
B)On
C)Chosen
D)Checked