In Python, the finally keyword is used to create a block of code that always runs, even if an exception is raised. It is commonly used for cleanup tasks.

If you raise an exception using the 'raise' keyword without specifying an exception type, it raises a generic 'Exception' with no message.

The primary distinguishing feature of elements in a Python set is that they are unique, meaning there are no duplicate elements in a set. Sets are also unordered, which means they don't have a specific order.

By default, when you execute a Python script, the 'name' attribute holds the value "main," indicating that the script is the main program.

Polymorphism allows a single interface or method name to represent different implementations in derived classes. It enables flexibility and dynamic method dispatch in object-oriented programming.

In Python, dictionaries can use immutable data types, such as strings and tuples, as keys because they are hashable and can be used to create unique hash values. However, lists are mutable, and their contents can change, so they cannot be used as dictionary keys.

In Python, when defining a property named 'value,' the corresponding setter decorator should be '@value.setter.'

Python is known for its dynamic typing, meaning you don't have to declare variable types. Static typing, on the other hand, requires explicit type declarations. Python's other features include easy-to-read syntax and being an interpreted language, making it different from statically typed languages.

The operator '//' performs truncated division. It returns the integer part of the result of division, discarding the decimal part.

The correct option is 4. It lacks proper indentation, which is essential in Python to define code blocks. An indentation error would occur in this case.