Question 1

If statements always make use of a Boolean expression.

Accepted Answer

A) True 
 B)False  True

Question 2

Rewrite the following program code with proper indentation.
if num > 100:
print('invalid value')
else:
if num > 50:
print('high value')
else:
print('low value')

Accepted Answer

if num > 100:
 print('invalid value')
else:
 if num > 50:
 print('high value')
 else:
 print('low value')

Question 3

A Boolean expression is an expression that evaluates to True or False.

Accepted Answer

A) True 
 B)False  True

Question 4

Match the descriptions with their terms:
-based on a condition that may be checked many times

Accepted Answer

A)  sequential control 
B)  selection control 
C)  iterative control 
A)  sequential control 
B)  selection control 
C)  iterative control

Question 5

not (flag1 or flag2) is logically equivalent to (not flag1) and (not flag2), where flag1 and flag2 are Boolean values.

Accepted Answer

A) True 
 B)False

Question 6

num1  num2), where num1 and num2 each contain an integer value.

Accepted Answer

A) True 
 B)False

Question 7

What is the term for a program that does not have any control flow, other than sequential control?

Accepted Answer

Straight-l

Question 8

Match the expressions that they are logically equivalent to the Boolean expressions :
-not (x == y)

Accepted Answer

A)  x < y 
B)  x <= y 
C)  x == y 
D)  x != y 
E)  not (x and y)
F) not (x or y) 
A)  x < y 
B)  x <= y 
C)  x == y 
D)  x != y 
E)  not (x and y)
F) not (x or y)

Question 9

The three forms of control provided by programming languages are ________________,__________, and __________________ control.

Accepted Answer

sequential

Question 10

Examine the following lines of code:
Current = 1
Sum = 0
N = 5
While current <= n:
Sum = sum + current
Current = current + 1
This is an example of:

Accepted Answer

A)  A definite loop 
B)  An indefinite loop 
C)  An infinite loop 
D)  Input error checking 
A)  A definite loop 
B)  An indefinite loop 
C)  An infinite loop 
D)  Input error checking

Question 11

The if statement in Python provides selection control.

Accepted Answer

A) True 
 B)False

Question 12

In Python, indentation is not significant. It is simply a strict convention used for readability and considered good programming etiquette.

Accepted Answer

A) True 
 B)False

Question 13

Give Python code that prompts the user to enter positive integer values, and continues to prompt the user until a value of -1 is entered, adding up all the value entered and displaying the result.

Accepted Answer

total = 0
value = int(input('Enter a pos

Question 14

Which of the following can the condition of an if statement be based on?

Accepted Answer

A)  Boolean variable 
B)  relational expression 
C)  Boolean expression 
D)  All of the above 
A)  Boolean variable 
B)  relational expression 
C)  Boolean expression 
D)  All of the above

Question 15

For a variable named num with an integer value, give an if statement that displays "valid value" only if the value of num is between 1 and 100, inclusive.

Accepted Answer

if num >=

Question 16

Match the expressions that they are logically equivalent to the Boolean expressions :
-not (x > y)

Accepted Answer

A)  x < y 
B)  x <= y 
C)  x == y 
D)  x != y 
E)  not (x and y)
F) not (x or y) 
A)  x < y 
B)  x <= y 
C)  x == y 
D)  x != y 
E)  not (x and y)
F) not (x or y)

Question 17

In order to construct an if statement that performs multiway selection between three or more sets of instructions (suites), the _______ header must be used.

Accepted Answer

The answer of In order to construct an if statement...

Question 18

A boolean flag is a variable with either a True or False value indicating whether a given event has occurred or not.

Accepted Answer

A) True 
 B)False

Question 19

Examine the following expression:
10  50
What does this expression evaluate to?

Accepted Answer

A)  True 
B)  False 
C)  True and False 
D)  That line of code is not valid in Python and will result in an error 
A)  True 
B)  False 
C)  True and False 
D)  That line of code is not valid in Python and will result in an error

Question 20

While loops are well suited for input error checking.

Accepted Answer

A) True 
 B)False

If statements always make use of a Boolean expression.

Rewrite the following program code with proper indentation. if num > 100: print('invalid value') else: if num > 50: print('high value') else: print('low value')

A Boolean expression is an expression that evaluates to True or False.

Match the descriptions with their terms: -based on a condition that may be checked many times

not (flag1 or flag2) is logically equivalent to (not flag1) and (not flag2), where flag1 and flag2 are Boolean values.

num1 <= num2 is logically equivalent to not (num1 > num2), where num1 and num2 each contain an integer value.

What is the term for a program that does not have any control flow, other than sequential control?

Match the expressions that they are logically equivalent to the Boolean expressions : -not (x == y)

The three forms of control provided by programming languages are ,, and ____ control.

Examine the following lines of code: Current = 1 Sum = 0 N = 5 While current <= n: Sum = sum + current Current = current + 1 This is an example of:

The if statement in Python provides selection control.

In Python, indentation is not significant. It is simply a strict convention used for readability and considered good programming etiquette.

Give Python code that prompts the user to enter positive integer values, and continues to prompt the user until a value of -1 is entered, adding up all the value entered and displaying the result.

Which of the following can the condition of an if statement be based on?

For a variable named num with an integer value, give an if statement that displays "valid value" only if the value of num is between 1 and 100, inclusive.

Match the expressions that they are logically equivalent to the Boolean expressions : -not (x > y)

In order to construct an if statement that performs multiway selection between three or more sets of instructions (suites), the _______ header must be used.

A boolean flag is a variable with either a True or False value indicating whether a given event has occurred or not.

Examine the following expression: 10 < 20 and 30 > 50 What does this expression evaluate to?

While loops are well suited for input error checking.

Introduction

Data and Expressions

Lists

Functions

Objects and Their Use

Modular Design

Text Files

Dictionaries and Sets

Object-Oriented Programming

Recursion

Filters

Exam 3: Control Structures

If statements always make use of a Boolean expression.

Rewrite the following program code with proper indentation. if num > 100: print('invalid value') else: if num > 50: print('high value') else: print('low value')

A Boolean expression is an expression that evaluates to True or False.

Match the descriptions with their terms: -based on a condition that may be checked many times

not (flag1 or flag2) is logically equivalent to (not flag1) and (not flag2), where flag1 and flag2 are Boolean values.

num1 <= num2 is logically equivalent to not (num1 > num2), where num1 and num2 each contain an integer value.

What is the term for a program that does not have any control flow, other than sequential control?

Match the expressions that they are logically equivalent to the Boolean expressions : -not (x == y)

The three forms of control provided by programming languages are ________________,__________, and __________________ control.

Examine the following lines of code: Current = 1 Sum = 0 N = 5 While current <= n: Sum = sum + current Current = current + 1 This is an example of:

The if statement in Python provides selection control.

In Python, indentation is not significant. It is simply a strict convention used for readability and considered good programming etiquette.

Give Python code that prompts the user to enter positive integer values, and continues to prompt the user until a value of -1 is entered, adding up all the value entered and displaying the result.

Which of the following can the condition of an if statement be based on?

For a variable named num with an integer value, give an if statement that displays "valid value" only if the value of num is between 1 and 100, inclusive.

Match the expressions that they are logically equivalent to the Boolean expressions : -not (x > y)

In order to construct an if statement that performs multiway selection between three or more sets of instructions (suites), the _______ header must be used.

A boolean flag is a variable with either a True or False value indicating whether a given event has occurred or not.

Examine the following expression: 10 < 20 and 30 > 50 What does this expression evaluate to?

While loops are well suited for input error checking.

Introduction

Data and Expressions

Lists

Functions

Objects and Their Use

Modular Design

Text Files

Dictionaries and Sets

Object-Oriented Programming

Recursion

Filters

The three forms of control provided by programming languages are ,, and ____ control.