Quiz3-DecisionStructures&BooleanLogic

Question 1

In many languages == operator determines whether one variable has the same value as another variable. (T/F)

Answer 1

True

Question 2

The OR operator will evaluate to True only if both subexpressions are also True (T/F)

Answer 2

False

Question 3

In an expression with an OR operator, it does not matter which subexpression is true for the compound expression to be true. (T/F)

Answer 3

True

Question 4

A nested decision structure can be used to test more than one condition. (T/F)

Answer 4

True

Question 5

A nested decision structure can achieve the same logic as a case structure. (T/F)

Answer 5

True

Question 6

The first line of a case structure starts with the word CASE, followed by the test expression. (T/F)

Answer 6

False

Question 7

A decision structure will produce unpredictable results if the programmer does not use proper indentation in the pseudocode.(T/F)

Answer 7

False

Question 8

An If-Then-Else statement must be used to write a single alternative decision structure.(T/F)

Answer 8

False

Question 9

The short-circuit evaluation is always performed with all expressions that contain any logical operators.(T/F)

Answer 9

False

Question 10

Decision structures and selection structures are completely different.(T/F)

Answer 10

False

Question 11

The following statement will evaluate to True: (T/F)

(5 > 6) OR (12 < 14)

Answer 11

True

Question 12

The following statement will evaluate to True: (T/F)

(5 > 6) AND (12 < 14)

Answer 12

False

Question 13

In a flowchart, the _________ symbol indicates that some condition must be tested.

Answer 13

diamond

Question 14

What type of operator determines whether a specific relationship exists between two values?

A) relational

B) Boolean

C) Mathmatical

Answer 14

A) relational

Question 15

Which operator is used in most languages to test if two operands DO NOT have the exact same value?

Answer 15

!=

Question 16

A case structure is a _________ alternative decision structure.

Answer 16

Multiple alternative decision structure

Question 17

Which of the following is NOT a logical operator?

A) AND

B) OR

C) NOT

D) All are logical operators

Answer 17

D) All are logical operators

Question 18

Which of the following is NOT a logical operator?

A) <>

B) OR

C) AND

Answer 18

A) <>

Question 19

The ________ operator is a unary operator, which means it works with only one operand.

Answer 19

NOT

Question 20

If an expression is FALSE, the __________ operator will return TRUE.

Answer 20

NOT

Question 21

Which two logical operators perform short-circuit evaluation?

Answer 21

AND and OR

Question 22

In many languages, the case structure is called a ___________ statement.

Answer 22

Switch

Question 23

What would be displayed if the following pseudocode was coded and executed, with salary = 400?

If salary > 400 Then
Set bonus = 10
Set salary = salary + bonus
End If
Display Salary

Answer 23

400

Question 24

What would be displayed if the following pseudocode was coded and executed, with salary = 400?

If salary > 400 Then
Set bonus = 10
Set salary = salary + bonus
Else
Set salary = salary + salary*.20
End If
Display Salary

Answer 24

480
Set salary = 400 + (400.20)
400.20 =80
400+80=480

Question 25

What would be displayed if the following pseudocode was coded and executed?

Declare String pet1 = “puppy”
Declare String pet2 = “kitten”
If pet1 == pet2 Then
Display “These animals are the same.”
Else
Display “These animals are different.”
End if

Answer 25

These animals are different.

Question 26

What would be displayed if the following pseudocode was coded and executed?

Declare String pet1 = “puppy”
Declare String pet2 = “kitten”
If pet1 > pet2 Then
Display “These animals are the same.”
Else
Display “These animals are different.”
End if

Answer 26

These animals are the same

p has a higher digit value than k based on how the programming HL stores characters. letters closest to A are less then letters closer to Z.

Question 27

What does the following expression evaluate to, given that
a = 3 and b = 6

(a == b) OR (b > a)

Answer 27

True

Question 28

What does the following expression evaluate to, given that
a = 3 and b = 6?

(a != b) AND (b > a)

Answer 28

True

Question 29

Which of the following expressions would check if a number, x, is between 90 and 100 inclusive?

A) x >= 90 OR x <= 100
B) x >= 90 AND x <= 100
C) x > 90 OR x < 100

Answer 29

B) x >= 90 AND x <= 100

Question 30

Which of the following expressions would check if a number, x, is outside range 90 - 100, inclusive (i.e, either less than 90 or greater than 100)?

A) x < 90 OR x > 100
B) x < 90 AND x > 100

Answer 30

A) x < 90 OR x > 100

Question 31

In the following pseudocode was coded and run, what would display, given that rate = 8?

Select rate
Case 10:
Display “A”
Case 9:
Case 8:
Display “B”
Case 7:
Case 6:
Display “C”
Default:
Display “Rating not possible.”
End Select

Answer 31

B

Question 32

If the following pseudocode was coded and run, what would display, given that rate = 9?

Select rate
Case 10:
Display “A”
Case 9:
Case 8:
Display “B”
Case 7:
Case 6:
Display “C”
Default:
Display “Rating not possible.”
End Select

Answer 32

B

Question 33

Given the following pseudocode, what would display if this pseudocode was coded and executed, given that
examGrade = 93
homeworkGrade = 87

If examGrade >= 90 AND homeWorkGrade >= 90 Then
Display “You are doing very well!”
Else If examGrade < 90 AND homeworkGrade >= 90 Tjem
Display “Study harder for the next exam.”
Else If the examGrade >= 90 AND homeworkGrade >= 90 Then
Display “See me for help with homework.”
Else
Display “Let’s talk about your grades.”
End If

Answer 33

See me for help with homework.

Question 34

Given the following pseudocode, what would display if this pseudocode was coded and executed, given that
examGrade = 73
homeworkGrade = 67

If examGrade >= 90 AND homeWorkGrade >= 90 Then
Display “You are doing very well!”
Else If examGrade < 90 AND homeworkGrade >= 90 Tjem
Display “Study harder for the next exam.”
Else If the examGrade >= 90 AND homeworkGrade >= 90 Then
Display “See me for help with homework.”
Else
Display “Let’s talk about your grades.”
End If

Answer 34

Let’s talk about your grades.