CompSci 101 Sec02, Fall 2025 Exam 1

Problem 1


a <class 'str'> truck   <- starts with truck
b <class 'str'> ti
c <class 'str'> ropeboatropeboat
d <class 'int'> 5
e <class 'str'> windya
f <class 'bool'> False
g <class 'str'> beaul
h <class 'list'> ['boat', 'sail', 'windy']
i <class 'list'> ['run', 'five', 'miles']
j <class 'str'> iful
k <class 'str'> cool8hot8windy
m <class 'float'> 6.2
n <class 'float'> 19.5
o <class 'int'> 8


Problem 2


PARTS A-C

[9, 5, 2, 8]
[7, 2, [9, 1]]     # -2 if have [7, 2, 9, 1]
[3, 5, 3, 5]       # -2 if have [3,5] [3,5]  OR [[3,5],[3,5]]

PART D

[6, 7, 2, 3]
[6, 7, 2, 3]

PART E

[6, 5, [4], 3, 9]
[6, 5, [4], 3]


Problem 3

PART A

result = lst[0][3] + lst[-1][-1]
OR
result = lst[-3][-3] + lst[2][2]

OR ANY COMBINATION OF THESE SUCH AS:
result = lst[0][-3] + lst[-1][2]


PART B

result = word[4:7] + word[1:3]
OR
result = word[-6:-3] + word[-9:-7]

OR ANY COMBINATION OF THESE SUCH AS:
result = word[4:-3] + word[-9:3]


PART C

result = lst[2][0][3:]
OR
result = lst[-1][-1][-4:]

OR ANY COMBINATION OF THESE SUCH AS:
result = lst[2][-1][3:]


PART D

word = "plingstrainstraystrop"
temp = word.split("str")
result = "pl".join(temp)

OR
result = "pl".join(word.split("str"))


Problem 4


def purchaseBooks(cost, taxPercent, discount):
    result = cost - (cost * discount/100.0)
    result = result + (result * taxPercent/100.00)
    return result

OR

def purchaseBooks(cost, taxPercent, discount):
    result = cost - (cost * (discount * 0.01))
    result = result + (result * (taxPercent * 0.01))
    return result

OR

def purchaseBooks(cost, taxPercent, discount):
    result = cost * (1 - discount/100.0)
    result = result *(1 +  taxPercent/100.00)
    return result

OR

def purchaseBooks2(cost, taxPercent, discount):
    num1 = discount/100    # works whether 100 is int of float
    num2 = taxPercent/100    # works whether 100 is int of float
    result = cost - num1*cost
    answer = result + result*num2
    return answer


Problem 5


def giveAwayFruit(amount1, amount2, limit):
    answer = ""
    if amount1 > limit:
        apple = amount1 - limit + 2
        answer = str(apple) + " A; "
    else:
        answer = "0 A; "
    if amount2 > limit:
        banana = amount2 - limit + 4
        answer += str(banana) + " B"
    else:
        answer += "0 B"
    return answer

OR


def giveAwayFruit(amount1, amount2, limit):
    if amount1 > limit:
        apple = amount1 - limit + 2
    else:
        apple = 0
    if amount2 > limit:
        banana = amount2 - limit + 4
    else:
        banana = 0
    answer = str(apple) + " A; " + str(banana) + " B"
    return answer


Problem 6

def compose(wordA, wordB, wordC, numA, numB):
    num = random.randint(1,3)
    ans = ""
    if num == 1:
        ans = wordA
    elif num == 2:
        ans = wordB
    else:
        ans = wordC
    num = random.randint(numA, numB)
    return ans + str(num)

OR

def compose(wordA, wordB, wordC, numA, numB):
    word = random.choice([wordA, wordB, wordC])
    num = random.randint(numA, numB)
    return word + str(num)


Problem 7


PART A: 

4 5 8

PART B:

4 5 9

PART C: 

7 5 9

PART D: 

4 8 7

PART E: 

The code does not check all the cases. For example, if num1 is the largest,
it doesn't check how num2 and num3 compare.

OR

Three values could be presented six different ways:
a b c,  a c b, b a c, b c a, c a b, c b a. This function only checks
and prints them four ways.


PART F: 

Semantic

PART G: 

In line 4 we need another if statement to compare num2 vs num3.
In line 10 we need another if statement to compare num2 vs num3.

OR

In both if statements, we need to add another if statement to compare num2 vs num 3.  


YOU WERE NOT SUPPOSED TO WRITE THE CODE BUT HERE IS WHAT IT WOULD LOOK
LIKE:

def sortNumsCorrect(num1, num2, num3):
    if num1 > num2:
        if num1 > num3:
            if num2 > num3:
                print(num3, num2, num1)
            else:
                print(num2, num3, num1)
        else:
            print(num2, num1, num3)
    else:
        if num1 > num3:
            print(num3, num1, num2)
        else:
            if num2 > num3:
                print(num1, num3, num2)
            else:
                print(num1, num2, num3)