interview challenges - systems design engineer (backend)

# QUESTION 1 ------------------------------------------------
#   What is the value of `b`?

a = [1, 2, 3, 4, 5]
b = [x ** 2 for x in a]


# QUESTION 2 ------------------------------------------------
#   What is the value of `c`?

a = "Hello, World!"
b = a.split()
c = len(b)


# QUESTION 3 ------------------------------------------------
#   What are the values of `a` and `b`?
#   What is the purpose of this method?

def f(x):
    if x % 2 == 0:
        return True
    else:
        return False

a = f(3)
b = f(6)


# QUESTION 4 ------------------------------------------------
#   What is the value of `a`?

def f(x):
    if x == 0:
        return 0
    return f(x-1)

a = f(3)

# QUESTION 5 ------------------------------------------------
#    What is the value of `d`?

a = """
  Hello
  from
  Red
  Hat
""".split()

b = [x for x in a if len(x) != 5]

c = ["Thank you"] + b

d = " ".join(c)