Exam

Define a function max_of_two, that takes two numbers, a and b, and returns the larger of the two numbers.

Restriction: You cannot use max or min functions.

Define a function, max_of_four, that takes four numbers, w, x, y and z, and returns the largest of the four numbers.

Restriction: You cannot use max, min or any relational operator (<, >=, ...).

ⓘ

Complete execution flow of the following program

Misses: 0

def is_vowel(char):
    for vowel in 'aeiou':
        if char == vowel:
            return 1
    return 0

def count_vowels(s):
    count = 0
    for char in s:
        count = count + is_vowel(char)
        if char == 'y':
            print('reset')
            count = 0

    return count

res = count_vowels('bye')

reset
>>>

Write a function, add that takes two numbers and returns their sum.

Write a function that takes three numbers and returns their sum.

Restriction: You cannot use + inside this function's body
Hint: You can use add, the function you defined above

ⓘ

Define a function, is_even, which takes one number, n, and returns True if it is even, False otherwise.

Define a function, add_evens, which takes one positive integer, n, and returns sum of all even numbers between 0 and n (inclusive). Example:

>>> add_evens(4)
6
>>> add_evens(7)
12
>>>

Restrictions:
- You cannot use %

ⓘ

Write a function, pow, which takes two numbers as arguments, x and y and returns x to the power of y

Write a function, multiply, which takes two numbers as arguments, a and b and returns their product.

Write a function, that takes two numbers, num1 and num2, and returns (num1 ** num2) * num2.

Restrictions:
- You cannot use ** or * inside this function's body
- You should use pow to calculate num1 ** num2 and multiply to calculate result of power * num2.

ⓘ

Write a function, mean that takes two numbers and returns their mean.

Example:
>>> mean(3, 5)
4.0

Write a function, square that takes a number and returns its square.

Example:
>>> square(3)
9

Write a function, square_of_mean, that takes two numbers and returns square of their mean.

Example:
>>> square_of_mean(4, 6)
25.0

Restriction: You cannot use *. + or / inside this function's body

ⓘ

def is_po(s):
    if s == 'po':
        return True
    return False

def is_zero(n):
    return n == 0

def aaa(a, b):
    if not is_po(a) and is_zero(b):
        return is_po(a)
    elif not is_zero(b):
        return 'pse'
    else:
        return is_po(a) and is_zero(b)

Given the above script, what are the results of the following calls:

aaa('po', 0):
aaa('jo', 0):
aaa('po', 2):

def a(x):
    return x % 3 == 0

def b(w, y):
    if w == y:
        return True
    return False

def ani(x, y):
    if not b(x, y):
        return a(x)
    elif b(x, y) and not a(x):
        return 'jo more'
    return b(x, y)

ani(3, 3)
ani(5, 5)

Given the above script, what are the results of the following calls:

ani(3, 3):
ani(5, 5):

Complete execution flow of the following program

Misses: 0

def calculate(x, y):
    res = x * y
    res = x + res
    revert(res, x, y)

def revert(a, b, c):
    res = a - b
    res = res / c
    print(res)

calculate(2, 3)

2.0
>>>

Complete execution flow of the following program

Misses: 0

def a(x):
    return x % 3 == 0

def b(w, y):
    if w == y:
        return True
    return False

def ani(x, y):
    if not b(x, y):
        return a(x)
    elif b(x, y) and not a(x):
        return 'jo more'
    return b(x, y)

ani(4, 4)