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Top 25 Python Questions:

1) What is Python? What are the benefits of using Python?
Python is a programming language with objects, modules, threads, exceptions and
memory management. The benefits of pythons are that it is simple and easy, portable,
extensible, build-in data structure and it is an open source.

2) What is PEP 8?
PEP 8 is a coding convention, a set of recommendation, about how to write your Python code
more readable.

3) What is pickling and unpickling?
Pickle module accepts any Python object and converts it into a string representation and
it into a file by using dump function, this process is called pickling. While the process of
retrieving original Python objects from the stored string representation is called unpickling.

4) How Python is interpreted?
Python language is an interpreted language. Python program runs directly from the source
code. It converts the source code that is written by the programmer into an intermediate
language, which is again translated into machine language that has to be executed.

5) How memory is managed in Python?
Python memory is managed by Python private heap space. All Python objects and data
structures are located in a private heap. The programmer does not have an access to
this private heap and interpreter takes care of this Python private heap.
The allocation of Python heap space for Python objects is done by Python memory
manager. The core API gives access to some tools for the programmer to code.
Python also have an inbuilt garbage collector, which recycle all the unused memory and
frees the memory and makes it available to the heap space.

6) What are the tools that help to find bugs or perform static analysis?
PyChecker is a static analysis tool that detects the bugs in Python source code and warns
about the style and complexity of the bug. Pylint is another tool that verifies whether the
meets the coding standard.

7) What are Python decorators?
A Python decorator is a specific change that we make in Python syntax to alter functions

8) What is the difference between list and tuple?
The difference between list and tuple is that list is mutable while tuple is not. Tuple can be
hashed for e.g as a key for dictionaries.

9) How are arguments passed by value or by reference?
Everything in Python is an object and all variables hold references to the objects. The
references values are according to the functions; as a result you cannot change the value of
references. However, you can change the objects if it is mutable.

10) What is Dict and List comprehensions are?
They are syntax constructions to ease the creation of a Dictionary or List based on existing

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