#Python interview questions code#

Sampledict = Ī7: Negative indexes allow you to count from the right instead of from the left. To create a dictionary in Python, curly brackets are used to define a dictionary as follows:

Known as an associative array in other languages, a dictionary associates a value to a key. Q6: What is a dictionary in Python and how do you create one?Ī6: A Python dictionary is a data structure that is implemented with key-value pairs. Unlike Java, Python supports multiple inheritance. The parent class or the class to which classes inherit from, will define base variables and methods for child classes to use.

Q5: Explain inheritance in Python? And does Python support multiple inheritance?Ī5: Inheritance is when a (child) class takes on certain traits of another class. A good example is the (x, y, z) tuple used as an axis in a mathematical sense. A tuple cannot be added upon or dimensions changed whereas a list can. Q4: What is the difference between a list and a tuple?Ī4: The main difference between a list and a tuple is that a list is mutable and a tuple is immutable. PYTHONHOME is an alternate module search path.

PYTHONCASEOK is used to enable finding module files on filesystems which are case insensitive. It is used to initialize settings such as the color, preloading common-use modules, etc. Q3: What are the PYTHONSTARTUP, PYTHONCASEOK and PYTHONHOME environment variables?Ī3: PYTHONSTARTUP is a path you set for a Python file that will be run before starting the Python interpreter mode (ie. Note that the PYTHONPATH variable is usually setup when Python is installed. The PYTHONPATH is used to contain the path or directory to where Python’s modules and packages are to be found. Q2: What is the purpose of the PYTHONPATH environment variable?Ī2: Python uses environment variables to set up the environment to which Python will operate in. Python provides an extensive list of libraries to extend the language with powerful functions and methods. Python functions and classes can be assigned to variables and passed as arguments to other functions. Python is a general purpose language meaning that it can be used for anything including data science, machine learning, automation, learning, scientific, mathematical, etc.įunctions and Classes are First-Class Objects Once written, Python can be transported to another platform with little to no modifications. Python follows the object-oriented paradigm meaning that you have the power of encapsulation, inheritance, polymorphism, etc. Python automatically identifies the data type by the value you store in it. You don’t need to declare the data type of a variable.

#Python interview questions code#

Python is an interpreted language that means the code does not have to be compiled before use. Python Interview Tip: Choose at least 5 of them and speak confidently about why Python is great. Q1: Tell me what are the key features of Python?Ī1: Here are some of the key features of Python. If possible, use your smartphone and video the practice interview and check your answers and the way you answered the questions. Practice with a friend by having your friend ask you these questions. To help you prepare for the technical interview ahead, we have compiled the most common Python interview questions in 2020. The best thing you can do for yourself and your career is to study up and be prepared to answer some tough Python interview questions.īeing prepared will help ease the tension and lessen the intimidation of a technical interview.