Python Fundamental Quiz 9

What will be the output of this generator expression?

gen = (x**2 for x in range(5))
print(sum(gen))

Which statement is incorrect about Python's global and nonlocal keywords?

What is the output of the following code?

x = [1, 2, 3]
y = x[:]
x[0] = 100
print(y)

What does collections.defaultdict do?

What is the output of the following code?

class A:
def __init__(self):
self.x = 1

class B(A):
def __init__(self):
super().__init__()
self.y = 2

a = A()
b = B()
print(a.x, b.x, b.y)

What does the following list comprehension do?

list_1 = [x for x in range(10) if x % 2 == 0]Creates a list of numbers from 0 to 10.Creates a list of numbers from 0 to 10.

Which of the following is true about Python's memory management?

What will be the output of the following code?

a = [1, 2, 3]
b = a
a.append(4)
print(b)

What will be the output of the following code?

def func(val, lst=[]):
lst.append(val)
return lst

print(func(1))
print(func(2))
print(func(3, []))
print(func(4))[1] [1, 2] [3] [1, 2, 4]

What will the following code output?

def func(a, b=[]):
b.append(a)
return b

print(func(1))
print(func(2))