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Question 1

An empty value, described by Python as None, is reflected by the JSON element named...

Options :

A : NULL

B : 0

C : null

D :

None

Answer: C

Question 2

The json.loads() method... (select 2)

Options :

A : takes Python data as its argument.

B : takes a JSON string as its argument.

C : returns a string.

D : returns a JSON object.

Answer: B,D

Question 3

The reason for implementing abstract classes is that...

Options :

A : abstract classes set requirements regarding methods that must be implemented by their subclasses.

B : abstract classes increase the security of your code.

C : abstract classes help you keep you code clean, short and self-documenting.

D : abstract classes decrease the code execution time.

Answer: A

Question 4

Decorators can be used... (select 2)

Options :

A : to speed up the execution of a function.

B : to validate arguments.

C : to change the Python version.

D : to record log messages.

Answer: B,D

Question 5

Select all true statements about Python docstrings with regard to PEP 257. (select 3)

Options :

A : Multi-line docstrings consist of a summary line just like a one-line docstring, followed by a blank line, followed by a more elaborate description.

B : A docstring should occur as the first statement in a module, function, class, or method definition.

C : For consistency, you should always use triple quotes - '''This is a docstring.''' around docstrings.

D : The one-line docstring prescribes the function or method’s effect as a command (“Do this”, “Return that”), not as a description; e.g. don’t write “Returns the pathname …”.

Answer: A,B,D