Question 1

You are developing a Python project and want to follow the PEP 8 guidelines for using comments effectively. Which of the following scenarios demonstrates the correct usage of block comments and inline comments according to PEP 8?

Options :

A : def calculate_sum(a, b):

# This function calculates the sum of two numbers

return a + b

B : # This function calculates the sum of two numbers

def calculate_sum(a, b):

"""

Adding the numbers together.

"""

return a + b

C : # This function calculates the sum of two numbers

def calculate_sum(a, b):

return a + b # Adding the numbers together

D : # calculate_sum function

# This function adds two numbers together and returns the result

def calculate_sum(a, b):

return a + b

E : def calculate_sum(a, b):

"""

This function calculates the sum of two numbers.

Args:

a: The first number.

b: The second number.

Returns:

The sum of the two numbers.

"""

return a + b

Answer: E

Question 2

In Python, there is a handy module, called shelve, that is built on top of pickle, and implements a serialization dictionary where objects are pickled and associated with a key. Therefore, you can open your shelved data file and access your pickled objects via the keys the way you do when you access Python dictionaries. For example:

import shelve

my_shelve = shelve.open('my_shelve.shlv', flag='c')

The flag parameter in the shelve.open() function specifies the mode in which the shelve database should be opened. The default values of the optional flag parameter is set to 'c'. This parameter can accept values like 'r', 'w', 'c' or 'n'. Select the answer that correctly describes these values.

Options :

A : 'r' - open existing database for reading and writing

'w' - open existing database for reading only

'c' - open database for reading and writing, creating it if it doesnâ€™t exist

'n' - always create a new, empty database, open for reading and writing

B : 'r' - open existing database for reading only

'w' - open existing database for reading and writing

'c' - open database only for writing, creating it if it doesnâ€™t exist

'n' - always create a new, empty database, open only for reading

C : 'r' - open existing database for reading only

'w' - open existing database for reading and writing

'c' - open database for reading and writing, creating it if it doesnâ€™t exist

'n' - always create a new, empty database, open for reading and writing

D : 'r' - open existing database for reading only

'w' - open existing database for reading and writing

'c' - always create a new, empty database, open for reading and writing

'n' - open database for reading and writing, creating it if it doesnâ€™t exist

Answer: C

Question 3

What is PEP's preferred way of breaking lines with binary operators?

Options :

A :

income = (gross_wages +

taxable_interest +

(dividens - qualified_dividends) -

student_loan_interest)

B :

income = (gross_wages +

+ taxable_interest +

+ (dividens - qualified_dividends) -

- student_loan_interest)

C :

income = (gross_wages +

+ taxable_interest +

+ (dividens - qualified_dividends) +

- student_loan_interest)

D :

income = (gross_wages

+ taxable_interest

+ (dividens - qualified_dividends)

- student_loan_interest)

Answer: D

Question 4

The following code snippet attempts to call a method with multiple arguments in Python. Identify the correct syntax for calling the method and provide the correct code snippet.

class Calculator:

def add_numbers(self, num1, num2):

return num1 + num2

# Attempt to call the add_numbers method

calculator = Calculator()

Options :

A : result = Calculator.add_numbers(3, 4, 5)

B : result = add_numbers(3, 4, 5)

C : result = calculator.add_numbers([3, 4, 5])

D : result = calculator.add_numbers(3, 4, 5)

Answer: D

Question 5

You are developing a Python application that requires secure communication over a network. Which of the following protocols would be most suitable to ensure secure transmission of data?

Options :

A : SMTP

B : HTTP

C : FTP

D : SSH

E : UDP

Answer: D

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