Correct answer is : C

x, y = y, x
The y value will be assigned to x and x value to y in the left hand side

Correct answer is : A

Python is case sensitive

Test = 10
test = 15
print (Test) # prints 10
print (test) # prints 15

In this case Test and test are not the same

Correct answer is : D

The identifier can be declared using _ ( underscore ).
Note - __name__ is a build in identifier provided by the python interpreter, assigning value to it might cause issue

Correct answer is : B

max is not a keyword, but a built-in function

Correct answer is : C

Spaces are not allowed in identifiers

Correct answer is : D

Identifiers are unlimited in length.
But as per PEP 8 , you should imit all lines to a maximum of 79 characters for a better readability

Correct answer is : B

def is a keyword in python. Keywords can not be used as variable names

Correct answer is : C

Most of the python keywords are lowercase. Except few keywords like True, None

Correct answer is : B

Variable names can not start with integers

Correct answer is : B

open is a built in function used to handle the file operations like read, write