Python Programming Interview Questions and Answers

Python Programming Interview Questions and Answers

Introduction of Python:

Python is a widely used high-level programming language for general-purpose programming, created by Guido van Rossum and first released in 1991. An interpreted language, Python has a design philosophy that emphasizes code readability (notably using whitespace indentation to delimit code blocks rather than curly brackets or keywords), and a syntax that allows programmers to express concepts in fewer lines of code than might be used in languages such as C++ or Java. It provides constructs that enable clear programming on both small and large scales.

Python is a general-purpose language. It has wide range of applications from Web development (like: Django and Bottle), scientific and mathematical computing (Orange, SymPy, NumPy) to desktop graphical user Interfaces (Pygame, Panda3D).

Python features a dynamic type system and automatic memory management. It supports multiple programming paradigms, including object-oriented, imperative, functional and procedural, and has a large and comprehensive standard library.

Python interpreters are available for many operating systems. CPython, the reference implementation of Python, is open source software and has a community-based development model, as do nearly all of its variant implementations. CPython is managed by the non-profit Python Software Foundation.

Python is easy to learn. The number of features in the language itself is modest, requiring relatively little investment of time or effort to produce one’s first programs. Python syntax is designed to be readable and straightforward. This simplicity makes Python an ideal teaching language and allows newcomers to pick it up quickly. Developers spend more time thinking about the problem they’re trying to solve, and less time thinking about language complexities or deciphering code left by others.

Python is broadly used and supported. Python is both popular and widely used, as the high rankings in surveys like the Tiobe Index and the large number of GitHub projects using Python attest. Python runs on every major operating system and platform, and most minor ones too. Many major libraries and API-powered services have Python bindings or wrappers, allowing Python to interface freely with those services or make direct use of those libraries. Python may not be the fastest language, but what it lacks in speed, it makes up for in versatility.

Python 3.6.3 is now the latest maintenance release of Python 3.6 and supersedes 3.6.2. Get 3.6.3

Python 3.6.4rc1 and 3.7.0a3 now available for testing:

  1. Python 3.6.4rc1 is the first release candidate for Python 3.6.4, the next maintenance release of Python 3.6. While 3.6.4rc1 is a preview release and, thus, not intended for production environments, we encourage you to explore it and provide feedback via the Python bug tracker (https://bugs.python.org). 3.6.4 is planned for final release on 2017-12-18 with the next maintenance release expected to follow in about 3 months.
  2. Python 3.7.0a3 is the third of four planned alpha releases of Python 3.7, the next feature release of Python. During the alpha phase, Python 3.7 remains under heavy development: additional features will be added and existing features may be modified or deleted. Please keep in mind that this is a preview release and its use is not recommended for production environments. Current version is python v3.7.0 / 27 June 2018.

What is Python?

What are the features of Python?

What are the applications of Python programming language?

What are the differences Python 2.x and Python 3.0?

What is PEP8?

What are the Built-in types Available in Python?

What makes Python differ from other programming languages?

What is the use of Python?

What is the difference between python and java?

What is the Python Decorator?

Explain python memory management?

What does a python do?

What is PYTHONPATH?

What are the Principal differences between The Lambda and Def?

How is Python executed?

What is NumPy?

What is the Pass Statement in Python?

What is the main purpose of “is” operator?

What is the main purpose of // operator?

What is Pickle in python?

What is pickling and unpickling?

How to use dictionaries in Python?

How will you create a dictionary in python?

What is the difference between list and tuple in Python?

What is the output of print (tuple(2)) if tuple = ('abcd', 786 , 2.23, 'john', 70.2 )?

What is the output of print( str(o))if str = 'Hello World!'?

What is the output of print str * 2 if str = ‘Hello World!’?

What is the output of print tuple`{`2:`}` if tuple = ( ‘abcd’, 786 , 2.23, ‘sam’, 70.2 )?

What is the difference between del and remove() method on list?

How will you reverse a list?

How will you remove last object from a list?

How do you create a Python function?

What is Iterator

What is monkey patching?

When would you use triple quotes as a delimiter?

How can you pick a random item from a range?

Can you explain string join()?

How will you check in a string that all characters are alphanumeric?

What do you know about unit test?

How many except statements can a try-except block have?

What is returned by math.ceil() function?

How can you get a random number in python?

What is a CPython?

What is the purpose continue statement in python?

What is a GIL?

What is Python itertools?

What is generators?

What is getattr()?

What is slicing?

How can you copy objects in Python?

What is the output of L(1:) if L = (1,2,3)?

Name a module that is not included in python by default?

What is __init__.py used for?

Why and when do you use generators in Python?

Explain the use of try: except: raise, and finally?

What happens if an error occurs that is not handled in the except block?

What happens when a function doesn’t have a return statement? Is this valid?

What is the different between range () and xrange () functions in Python?

How do you invoke the Python interpreter for interactive use?

How are Python blocks defined?

List down some of the PDB Commands for Debugging Python Programs?

What does the <yield> keyword do in python?

What does the <Self> do?

Is there a switch or case statement in Python? If Not Then what is the reason for the same?

How to find bugs or perform static analysis in a Python application?

Name few Python Web Frameworks for developing web applications?

How do you check the file existence and their types in Python?

How do you remove duplicates from a list?

Does Python supports interfaces like in Java?

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