Chapter 3 checkpoint questions

Question 1

What is a control structure?

Answer 1

A logical design that controls the order in which a set of statements execute.

Question 2

What is a decision structure?

Answer 2

It is a program structure that can execute a set of statements only under certain circumstances.

Question 3

What is a single alternative decision structure?

Answer 3

A decision structure that provides a single alternative path of execution. If the condition that is being tested is true, the program takes the alternative path.

Question 4

What is a Boolean expression?

Answer 4

An expression that can be evaluated as either true or false.

Question 5

Write an if statement that assigns 0 to x if y is equal to 20.

Answer 5

if y == 20:

x = 0

Question 6

Write an if statement that assigns 0.2 to commissionRate if sales is greater than or equal to 10000.

Answer 6

if sales >= 10000:

commissionRate = 0.2

Question 7

What would the following code display?

if ‘z’ < ‘a’:
print(‘z is less than a.’)
else:
print(‘z is not less than a.’)

Answer 7

z is not less than a.

Question 8

What would the following code display?

s1 = 'New York'
s2 = 'Boston'

if s1 > s2:
   print(s2)
   print(s1)
else: 
   print(s1)
   print(s2)

Answer 8

Boston

New York