Python Interview Questions

Basic Python Interview Questions and Answers

Following is the list of Python basic interview questions that are asked during job interviews:

Q. Explain the difference between tuples and lists in Python.

A. Lists can be edited; that is, they are mutable, while tuples aren't. Also, the lists are slower when compared to tuples.

Q. Can you name a few key features of Python?

A. Python is simply an interpreted programming language. Unlike C and other variants, it is not necessary to compile Python before running. It is dynamically typed, which means that stating the variables isn't required while declaring them. The only downside is that writing Python code is faster but running it is slower when compared to a compiled programming language.

Q What is exactly Python?

A. In general, Python is a general-purpose programming language but is also capable of scripting.

Q. How will you explain Python as an interpreted language?

A. An interpreted language is the one programming language that isn't in the machine level code before the runtime. Hence Python is considered as an interpreted language.

Q. How will you explain PEP 8?

A. The abbreviation of PEP is Python Enhancement Proposal. PEP 8 is nothing but a set of rules that provide specifications on formatting Python code for enhanced readability.

Q. What do you understand about Pythonpath?

A. Pythonpath happens to be an environmental variable used during the importing of modules. It is looked up to find the presence of the imported module across directories.

Basic Python Interview questions asked to freshers

Here are some of the most basic questions that are asked from freshers during an interview for a job profile that involves using Python.

Q. Name the key features of the Python programming language.

A. A few key features of the Python language are that it's object-oriented, concise and simple, and free. Python is dynamically typed and is interpreted. It also has a large community of developers working on Python.

Q. How do you differentiate between tuples and lists?

A. A key difference between the both is that the tuples are immutable while lists are mutable.

Q. Can you brief me on ternary operators in Python?

A. In Python we don't have ?: Unlike C language. We have instead [on true] if [expression] else [on false]

If the expression happens to be true, then the statement happens to be executable under [on true]; otherwise, it is executed under [on false].

Q. What do you understand about Python case sensitivity?

A. Python language is considered case sensitive when it helps distinguish between identifiers such as ‘Myname’ and ‘myname’. In simpler words, it distinguishes the case difference.

Q. For how long an identifier will be in Python?

A. The official documentation on Python suggests that the identifier can be of any varying length. But the PEP 8 suggestions show that they are to be limited up to 79 characters maximum. While PEP 20 suggests that readability counts. A long identifier will violate PEP 20 and PEP 8 as well.

Python Interview questions for experienced developers

Mentioned below are some of the most important questions on Python which can be posed to experienced developers during an interview.

Q. Can you tell us about the types of classifiers you use for your projects?

A. A Multilayer Perceptron classifier is an MLPClassifier. The use of LBFGS helps in the optimization of the log loss function. It is quite different to the Naive Bayes or SVM algorithms. In these, they have a presence of neural links that are internal and are used for classification. For speech recognition, I also use MLPClassifier. To detect the presence of Invasive Ductal Carcinoma, I make use of the softmax classifier.

Q. For gender and age detection, why make use of OpenCV?

A. OpenCv happens to have gained popularity for computer vision purposes, and it also is a very powerful tool. I use these for my project on gender and age detection because they sufficed all my needs to carry out the project. It had all the tools I needed for the same. Some of the key benefits are:

Common FAQs on Python

Q. Is it easy to learn the Python programming language?

A. Python happens to be one of the easiest programming languages to learn. Many beginners start with Python and then proceed to other programming languages.

Q. What else do I need to know before learning Python?

A. Know the difference between front end and back end in web development. The front end is what you see when you visit a website, while the back end is the code that commands the website to show what you see at the front end.

Q. What can I do with Python?

A. It is a great tool to build the backend of websites. It also helps in data analysis and accessing the API data. Python is also vital for machine learning and automating repetitive tasks.

Q. How can I learn Python on my own?

A. If you do not want to go for an offline course in Python, then you can opt for the online learning method. Install Python 3 on your laptop/desktop and start attending the online classes. Afterwards, practice various operations in Python 3 regularly to hone your skills.

Q. What is the difference between Python 3 and Python 2?

A. In simple words, Python 3 is for the future, and Python 2 is the legacy. Python 3 is much more advanced in terms of carrying out the work. A lot of advanced work can be done with Python 3. But many companies stick to Python 2 because they prefer using the language that is working for them well for the task at hand.