Which function helps to find the length of string

What arithmetic operators cannot be used with strings? 

 What will be the output of the following Python expression if a=15 and b=12? 

a & b 

What will be the output of the following Python code?

x = [12, 34]
print(len(''.join(list(map(str, x)))))

What is the output of the given code?

def fun():

    global s

    print(s)

    

s="Abekus"

fun()

print(s)

What will be the output of the following Python code?

a = {1, 2, 3}
a.intersection_update({2, 3, 4, 5})
print(a)

 What is a recursive function? 

What will be the output of the following Python code?

class test:
def __init__(self, a="Hello World"):
self.a=a

def display(self):
print(self.a)

What Is The Output Of The Following Code Snippet?

def test_var_kwargs(farg, **kwargs):
   print ("formal arg:", farg)
   for key in kwargs:
       print ("another keyword arg: %s: %s" % (key, kwargs[key]))
test_var_kwargs(farg=1, myarg2="two", myarg3=3)