Skill Tests

Skill Test #4 Practice Questions

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• skill_test_#4_practice_questions.py

### Skill #1: filter

def evens(nums):
    """
    Takes in a list of integers and returns a list with only
    the even integers retained.

>>> nums = [0, 1, 2, 3, 4, 5, 6, 7, 8]
    >>> evens(nums)
    [0, 2, 4, 6, 8]
    """
    return
    
def vowels(strs):
    """
    Takes in a list of strings and returns a list with only
    the strings that have an 'a' retained.

>>> strs = ["abc", "bcd", "cde"]
    >>> vowels(strs)
    ['abc']
    """
    return

### Skill #2: map with two iterables

def add(lst1, lst2):
    """
    Takes in two lists of integers and adds elements
    at corresponding indices together.

>>> lst1 = [1, 2, 3, 4, 5]
    >>> lst2 = [5, 4, 3, 2, 1]
    >>> add(lst1, lst2)
    [6, 6, 6, 6, 6]
    """
    return

def combine_strs(strs1, strs2):
    """
    Takes in two lists of strings and concatenates the strings
    at corresponding indices together. If the string's length is even,
    make it all uppercase, otherwise make it all lowercase.

>>> strs1 = ["anish", "carter", "ty"]
    >>> strs2 = ["KASAM", "TRAN", "ALBAO"]
    >>> combine_strs(strs1, strs2)
    ['ANISHKASAM', 'CARTERTRAN', 'tyalbao']
    """
    return

### Skill #3: map & filter together

def filter_square(nums):
    """
    Takes in a list of integers and returns a list of
    the even integers squared.

>>> nums = [1, 2, 3, 4, 5]
    >>> filter_square(nums)
    [4, 16]
    """
    return

def long_names(first, last):
    """
    Takes in two lists of strings, first and last names. 
    Returns a list of full names that are atleast 10 characters.
    Don't add a space between first and last names.

>>> first = ["anish", "carter", "ty"]
    >>> last = ["kasam", "tran", "albao"]
    >>> long_names(first, last)
    ['anishkasam', 'cartertran']
    """
    return

### Skill #4: calling a lambda function

def square(x):
    '''
    Call the lambda function assigned to variable g.
    Assign the function output to the variable called result.
    >>> square(3)
    9
    >>> square(5)
    25
    >>> square(0)
    0
    '''
    g = lambda x: lambda y: x**2
    result = None # YOUR CODE GOES HERE (DELETE NONE)
    return result

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