Booleans Practice Quiz¶

To confirm that you understand the major concepts you’ve seen in Python, try to answer the following questions without opening Python.

Question 1¶

boolean-quiz1: What would the following print?:

a = 6
b = 10
print(a == 6)

boolean-quiz2: What would the following print?:

a = 6
b = 10
print( not (b == 6) )

boolean-quiz3: What would the following print?:

a = 6
b = 10
print( a == 10 or b == 10 )

True
Great!
False
The expression a == 10 evaluates to False, but b == 10 evaluates to True, so the overall expression evaluates to True.

boolean-quiz4: What would the following print?:

a = 6
b = 10
if a == 6 and 10:
    print("True")
else:
    print("False")

True
Great!
False
The expression a == 6 and 10 evaluates to True because the if statement does not have a full condition on both sides of the and operator. In other words, the a == 6 evaluates to True and the 10 evaluates to True. This is a common error when writing a boolean question. What is likely intended is a == 6 and a === 10.

boolean-quiz5: What would the following print?:

a = 6
b = 10
print( not a == 10 and b == 10 )

True
Great!
False
The expression a == 10 evaluates to False, so not a == 10 evaluates to True, and b == 10 is True, so the overall expression is True.

boolean-quiz6: What would the following print?:

a = 6
b = 10
print( a == 10 or not b == 10 )

True
The expression a == 10 evaluates to False, and not b == 10 evaluates to False, so the overall expression is False.
False
Great!

boolean-quiz7: What would the following print?:

a = 6
b = 10
print( a == 6 and (not a == 10) )

True
Great!
False
The expression a == 6 evaluates to True and not a == 10 evaluates to True, so the overall expression is True.

boolean-quiz8: What would the following print?:

a = 6
b = 10
print( not ( not a == 10 or not b == 10) )

True
The expression not a == 10 evaluates to True and not b == 10 evaluates to False, so the overall expression inside the parentheses is True, and the outer not makes it False.
False
Great!

boolean-quiz9: What would the following print?:

a = 6
b = 10
print( a != 6 and b == 10 )

boolean-quiz10: What would the following print?:

a = 6
b = 10
print( not ( a != 10 or b != 10) or not b == 5)

True
Great!
False
The expression a != 10 evaluates to True and b != 10 evaluates to False, so the overall expression inside the parentheses is False, and the outer not makes it True. The second part of the expression not b == 5 evaluates to True, so the overall expression is True.