Quiz 2

Question 1

What is a Boolean Expression?

Answer 1

A bool is a data type. An expression that is tested to see whether it is true or false by an if statement in Python.

Question 2

What is a control structure?

Answer 2

A control structure allows us to control the order in which a set of statements executes

Question 3

What is a sequence structure?

Answer 3

a set of statements that execute in the order that they appear.

Question 4

What is a dual alternative decision structure? How does it work? What statment do you use in Python to write a dual alternative decision structure?

Answer 4

if else clause. One taken if the condition is true and the other if the condition is false.

Question 5

Write a snippet of code that will compare two strings. The program will print “They are the same” if the strings are identical. The program will print “They are not the same.” if the strings are different.

Answer 5

P = "something"
Q = "something"
if (P == Q):
       print ("They are the same.")
else:
       print("They are the same.")

Question 6

What is a compound Boolean expression?

Answer 6

( P==Q and R==S)

Question 7

What will the program display?
s1 = "Dillon"
s2= "Butte"
if s1 > s2:
     print (s2)
     print (s1)
else:
    print (s1)
    print (s2)

Answer 7

Butte

Dillon

Question 8

Simplify:

Not (num >0 and temp <=0)

Answer 8

num <= 0 or temp >0

Question 9

Simplify:

not (sum<5 or not (num>0)

Answer 9

sum >=5 and num>0

Question 10

simplify:

not(num>0 and sum >0)

Answer 10

num<= 0 and sum <=0

Question 11

simplify:

not( X and not Y) or (X and Y)

Answer 11

(not X or Y) and (X or Y)

Question 12

What is a decision structure:

Answer 12

specific action(s) performed only if a condition exists

Question 13

write an if statement that assigns 20 to the variable y and assigns 40 to the variable z if the variable x is greater than 100

Answer 13

if x > 100:
y = 20
Z = 40

Question 14

What is a single alternative decision structure:

Answer 14

provides only one alternative path of execution

Question 15

What is a relational operator?

Answer 15

determines whether a specific relationship exists between two values Example: greater than (>)

Question 16

What are logical operators?

Answer 16

operators that can be used to create complex Boolean expressions

Question 17

Write an if-else statement that determines whether the points variable is outside the range 9 to 51. if the variable’s value is outside this range it should display “invalid points.” Otherwise, it should display “Valid points.”

Answer 17

points = 100
if points <  9 or points > 51:
        print("Invalid points:)
else:
        print("Valid points")

points = 100
if 9 <= points <= 51:
       print("valid points")
else:
       print("invalid points")

Question 18

Convert the nested if-else statements into an if-elif-else statement:
if num == 1:
     print("one")
else:
     if num == 2:
           print("two")
     else:
            if num == 3:
                 print("three")
           else:
                  print("unknown")

Answer 18

if num == 1:
     print ("one")
elif num == 2:
     print ("two")
elif num == 3:
     print ("three")
else:
     print("unknown")

Question 19

The area of a rectangle is the rectangle’s length times its width. Write a program that asks for the length and width of two rectangles. The Program should tell the user which rectangle has the greater are, or the areas are the same.

Answer 19

length1 = float(input("Enter the length of the first rectangle: "))
width1 = float(input("Enter the width of the first rectangle: "))

length2 = float(input("Enter the length of the second rectangle: "))
width2 = float(input("Enter the width of the second rectangle: "))

if ((length1width1) == (length2width2)):
print(“They have the same area”)
elif ((length1width1) > (length2width2)):
print(“The area of rectangle 1 is greater than rectangle 2”)
else:
print(“The area of rectangle2 is greater than rectangle 1.”)