Question 1

Which code snippet follows PEP 8 recommendations for making comparisons to the None object?

Options :

A :

if not user_input is None:

print('You have entered some value.')

B :

if user_input == None:

print('You have not entered any value.')

C :

if user_input = None:

print('You have not entered any value.')

D :

if user_input is None:

print('You have not entered any value.')

Answer: D

Question 2

Python knows what to do when the interpreter spots the ** operator between two objects - it looks for the magic method responsible for the called function or operator in order to apply it to the operands (objects). In fact, the following snippet of code:

var1 = 2

var2 = 4

result = var1 ** var2

is translated to:

Options :

A :

var1 = 2

var2 = 4

result = var1.__power__(var2)

B :

var1 = 2

var2 = 4

result = var1._pow_(var2)

C :

var1 = 2

var2 = 4

result = var1.pow(var2)

D :

var1 = 2

var2 = 4

result = var1.__pow__(var2)

Answer: D

Question 3

In Python, which of the following methods is necessary to override when inheriting from a built-in immutable class (like tuple or str) if you want to add additional attributes to it?

Options :

A : __new__()

B : __str__()

C : __init__()

D : __call__()

Answer: A

Question 4

Why is the requests library important? (select 2)

Options :

A : Provides a clear and concise framework to work with HTTP requests.

B : Abstracts the complicated parts of HTTP protocol.

C : It is the only available option for making HTTP connections in Python.

D : De facto standard for making HTTP requests in Python.

Answer: A,B,D

Question 5

Given the following Python code snippet:

1. import math, sys, os

2. from my_module import my_function

3.

4. def calculate_radius(area):

5. return math.sqrt(area / math.pi)

6.

7. print(calculate_radius(50))

According to PEP 8 guidelines, which of the following modifications would improve the code's readability and maintainability?

Options :

A : Replace the parentheses in the print function with square brackets.

B : Move the import statement of my_module to the top of the file.

C : Import each module on a separate line.

D : Remove the whitespace around the / operator in the calculate_radius function.

Answer: C

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