Deck 7: Complex Conditions

Question 1

Numeric variables can be used to hold values such as "true" and "false" or "yes" and "no."

Answer 1

False

Question 2

The Boolean variable was developed by Tim Berners-Lee, who also developed logical concepts.

Answer 2

False

Question 3

An advantage of the Boolean data type is that when testing a variable's value, a true value is assumed without having to state it.

Answer 3

True

Question 4

When testing to see whether a Boolean variable's value is false, you must include the == True or use the keyword Not in front of the variable.

Question 5

When testing whether the value of a Boolean variable is true, you do not need to include the relational operator and the value (as in == True) in the condition.

Question 6

If you are assigning a value to a Boolean variable, you need to include the assignment operator and the value = True or = False.

Question 7

Conditions are joined with the keyword And or Or.

Question 8

In JavaScript, a single condition can be negated with the keyword Nor.

Question 9

In a decision table, you put a dash in cells containing irrelevant conditions and then merge the columns.

Question 10

Each path on a binary tree leads to another condition that also splits into two paths.

Question 11

If a condition is irrelevant at some point on a binary tree, it does not need to be split into true and false paths.

Question 12

A decision table is usually converted into a binary tree.

Question 13

In JavaScript, the And operator is &.

Question 14

In JavaScript, the Or operator is //.

Question 15

In JavaScript, the Not operator is ||.

Question 16

Conditions in JavaScript are enclosed in parentheses.

Question 17

The following JavaScript code is a repetition statement.
if (age >= 18 && age <= 65) {
document.write("The age is between 18 and 65." + BR);
}

Question 18

When two conditions joined by the logical And operator are evaluated, if the first one is false, there is no need for the computer to evaluate the second one.

Question 19

If you have statistics on the expected frequency of condition evaluations, you should use them to make your program faster and more efficient.

Question 20

In the following pseudocode, if any of three conditions evaluates as true, the combined condition is also true.
If code == "SF" Or code == "SP" Or code == "SB" Then
Display "Your order has been shipped."
End If

Question 21

Logical operations have a specified order of precedence, just as arithmetic operations do.

Question 22

In JavaScript, the Or operator takes precedence over And.

Question 23

In JavaScript, you should use parentheses to make your intentions clear to both the computer and the reader.

Question 24

When one of the conditions in a complex condition is treated differently than the combined condition, nested conditions result in the clearest logic and the fewest comparisons.

Question 25

The Math class in JavaScript has the random() method.

Question 26

A ____ occurs when two or more conditions have to be evaluated for an action to take place.

A) validation loop
B) complex condition
C) short-circuit evaluation
D) dual-outcome selection

Question 27

Which of the following sets of conditions is equivalent?

A) paymentIsOverdue = True
SeniorCitizen = False

B) Declare Boolean paymentIsOverdue Declare Boolean seniorCitizen

C) If paymentIsOverdue
If paymentIsOverdue == True

D) Declare Boolean personHasMoney
Declare Boolean showedID

Question 28

The keywords And, Or, and Not, are known as ____.

A) decision tables
B) relational operators
C) logical operators
D) static variables

Question 29

Which of the following is considered a dual-outcome selection?

A) If Not balance < 200 Then
Display "Your account will continue to earn interest."
End If

B) If personHasMoney And showedID Then
TicketPrice = discountPrice
Else
TicketPrice = regularPrice
End If

C) If personHasMoney And showedID Then
TicketPrice = discountPrice
End If

D) If password != "sugarBear" Then
Display "Sorry, incorrect password."
End If

Question 30

Which of the following pseudocode statements express the condition below?
A movie theater admits a customer free if he or she is under 2 years old or if he or she is 65 or older.

A) If age < 65 Or age >=2 Then
AdmissionPrice = 0
Else
AdmissionPrice = regularPrice

B) If age < 2 Or age <= 65 Then
AdmissionPrice = 0
Else
AdmissionPrice = regularPrice

C) If age > 2 Or age < 65 Then
AdmissionPrice = 0
Else
AdmissionPrice = regularPrice

D) If age < 2 Or age >=65 Then
AdmissionPrice = 0
Else
AdmissionPrice = regularPrice

Question 31

Which of the following pseudocode statements expresses the condition below?
A hotel customer gets a 10% discount for showing a hotel club card or a travel club card.

A) If showsHotelClubCard And showsTravelClubCard Then
Discount = 0.10
Else
Discount = 0.00
End If

B) If showsHotelClubCard Or showsTravelClubCard Then
Discount = 0.00
Else
Discount = 0.10
End If

C) If showsHotelClubCard Or showsTravelClubCard Then
Discount = 0.10
Else
Discount = 0.00
End If

D) If showsHotelClubCard And showsTravelClubCard Then
Discount = 0.00
Else
Discount = 0.10
End If

Question 32

Which of the following uses the unary logical operator?

A) If password != "sugarBear" Then
Display "Sorry, incorrect password."
End If

B) If showsHotelClubCard Or showsTravelClubCard Then
Discount = 0.10
Else
Discount = 0.00
End If

C) If personHasMoney And showedID Then
TicketPrice = discountPrice
End If

D) If balance >= 200 Then
Display "Your account will continue to earn interest."
End If

Question 33

And and Or are called ____ because they operate on two conditions, joining them into a combined condition.

A) unary logical operators
B) relational operators
C) static operators
D) binary logical operators

Question 34

The Not operator, which is placed before a condition to negate it, is a(n) ____ because it operates on a single condition or a single combined condition.

A) unary logical operator
B) relational operator
C) binary logical operator
D) static operator

Question 35

A(n) ____ is a tool for expressing the results of combinations of conditions.

A) flowchart
B) UML diagram
C) truth table
D) logical operator

Question 36

When two conditions are joined by the logical ____ operator, both must be true for the combined condition to be true.

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

Question 37

A ____ enables you to state all conditions relevant to a decision, the true and false combinations of these conditions, and the outcomes associated with each combination.

A) decision table
B) selection structure
C) repetition structure
D) sequence structure

Question 38

With a ____, each condition must be stated as a Boolean condition, with only true and false possibilities as answers.

A) UML diagram
B) flowchart
C) selection structure
D) decision table

Question 39

A ____ traces all combinations by starting with one condition and splitting into true and false paths.

A) binary tree
B) relational operator
C) logical operator
D) truth table

Question 40

A method for indicating the outcome of combining conditions that appeals to right-brained people is a ____.

A) binary tree
B) selection structure
C) sequence structure
D) repetition structure

Question 41

On a binary tree, ____ are used to represent conditions.

A) flowlines
B) ovals
C) diamond boxes
D) process rectangles

Question 42

On a binary tree, ____ are used to represent branches.

A) flowlines
B) ovals
C) diamond boxes
D) process rectangles

Question 43

On a binary tree, ____ are used to represent outcomes.

A) flowlines
B) ovals
C) diamond boxes
D) process rectangles

Question 44

Which of the following represents a negated condition?

A) if (daysOverdue > 10 || fineOwed > 0.00) {
Document.write("Please call the library immediately!"
+ BR);
}

B) if (!(daysOverdue > 10 || fineOwed > 0.00)) {
Document.write("Your account is in good standing." + BR);
}

C) if (age >= 18 && age <= 65) {
Document.write("The age is between 18 and 65." + BR);
}

D) function inquiry(balance) {
Document.write("Your current balance is: $" +
Balance.toFixed(2) + BR);
}

Question 45

Which of the following represents an example of data validation?

A) if (daysOverdue > 10 || fineOwed > 0.00) {
Document.write("Please call the library immediately!"
+ BR);
}

B) if (!(daysOverdue > 10 || fineOwed > 0.00)) {
Document.write("Your account is in good standing." + BR);
}

C) if (age >= 18 && age <= 65) {
Document.write("The age is between 18 and 65." + BR);
}

D) while (!(month >= 1 && month <= 12)) {
Month = prompt
("ERROR...Enter a number between 1 and 12",ES);
}

Question 46

A(n) ____ is a process that does not evaluate the second condition of a combined condition if evaluation of the first condition determines the outcome.

A) logical evaluation
B) unary evaluation
C) short-circuit evaluation
D) binary evaluation

Question 47

A(n) ____ is used when you need one action performed when the combined condition is true and another action performed when the combined condition is false.

A) truth table
B) complex condition
C) nested condition
D) short-circuit evaluation

Question 48

Which of the following generates a random number between 0 and 1?

A) var randomNum = Math.random();
Document.write(randomNum);

B) var randomNum = Calculate.random();
Document.write(randomNum);

C) var randomNum = Number.random();
Document.write(randomNum);

D) var randomNum = Math.randomNumber();
Document.write(randomNum);

Question 49

Which of the following generates a random number between 0 and 10?

A) var randomNum = Math.random() * 10;
RandomNum = Math.floor(randomNum)+ 1;
Document.write(randomNum);

B) var randomNum = Calculate.random() * 10;
Document.write(randomNum);

C) var randomNum = Number.random() * 10;
Document.write(randomNum);

D) var randomNum = Math.randomNumber() * 10;
Document.write(randomNum);