When answering this interview question, a junior Python developer candidate may answer None, strings, or numbers. A mid-level developer may mention booleans, tuples, or any immutable object. However, a senior Python developer is expected to answer that any hashable object can be the key of a dictionary. Conducting interviews that really help you figure out if a candidate is up to the job can be just as tricky. Our experience and data show that finding the right interview questions to spot a top-notch Senior Python developer is no walk in the park.

Behavioral questions also give the interviewers an idea of how you might behave if a similar situation were to occur in the future. You will need to show that you have the right technical skills to back up your knowledge of Python. Decorators are the functions to add functionality to an existing process without making any changes to the structure of that function. PYTHONPATH is an environment variable when a module gets imported. It is used to look up the presence of imported modules in various directories. It would help if you tried to tell the interviewers how you stay up to date with the latest developments.

Unlock Vue.js Expertise: 10 Essential Interview Questions for Seniors (+Expected Answers)

Polymorphism is a concept that refers to the ability of objects to take on multiple forms. In Python, it allows objects of different classes to be treated as if they belong to a common superclass. You can use the ‘append()’ method to add an element to the end of a list. Generators in Python define iterator implementation by yielding expressions in a function. They don’t implement ‘iter’ and ‘next()’ methods, thereby reducing various overheads.

In a distributed system there are different machines that communicate with each other to do a job. Using libraries like Apache Spark or Ray can be a good approach for scalability. While the Python interpreter is using GIL to lock T1, all other threads have to wait. After T1 finishes, it releases GIL and passes it to another thread T2 that needs it. The reason for the GIL presence is to make CPython thread-safe and not allow some threads to interfere with one another. Start today by requesting a demo or posting a job for free to discover how Workable can help you find and hire great people.

How do you write scalable code in Python?

Behavioral Python interview questions focus on how you have handled past work situations. For a senior position, companies will want a solid background in computer science. Your understanding of basic algorithmic concepts such as how to sort, search, and find through various data structures is tested. Most Python developers work on the back-end, so they should understand databases more comprehensively. Iterators are objects that allow iteration over elements, usually in collections like lists. They implement the ‘__iter__()’ and ‘next()’ methods for iteration.

  • Python provides a useful method issubclass(a,b) to check if class a is a subclass of b.
  • It is used for converting one data type into the other, for example, characters into an integer – ord(0), any data type to list type – list(), integer into a string – str(), etc.
  • By contrast, immutable data types cannot (e.g., strings, tuples).
  • The prospects of Python developers are promising as big data and machine learning become essential.
  • Bytecode is made out of bytes that represent the machine’s instructions.
  • But before, reaching to Python developer Interview round, you must curate ideal Python developer resumes for accurate hire, check out their Python skills, and so on.

Pickling is a process by which a Python object hierarchy can be converted in a byte stream. This module has the implementation of a powerful algorithm for serialization and deserialization of Python object structures. Some people also call pickling as serialization or marshalling. With serialization we can transfer Python objects over the network. It is also used in persisting the state of a Python object.

Common Situational Python Interview Questions

Slicing is also a string operation for extracting a part of the string, or some part of a list. Flask is a micro-framework based on Python to develop web applications. It is a very simple application framework that has many extensions to build an enterprise-level application. Flask does not provide a data abstraction layer or form validation by default. External libraries can be used on top of Flask to perform such tasks.

senior python developer interview questions

To help you prepare for the interview, we have put together a list of the top Python interview questions and answers. BrainStation’s Python Developer career guide can help you take the first steps toward a lucrative career in web development and data science. Read on for an overview of common Python Developer job interview questions and how to answer them. RealLifeTestingTM is the methodology behind all DevSkiller Python coding challenges. This methodology is based on the simple idea that it is better to test developers by simulating scenarios that are similar to those they are likely to encounter in their everyday work.

How does Python handle memory management?

The answer to this Python developer interview question can be modified depending on your project requirement. In simple words, Python interview questions make every interaction count, which maintains the efficiency and efficacy of your efforts in the recruitment cycle. Before we hop right into the Python interview questions, allow us a moment to explain the why behind them. This is because most developers miss that this code changes the value of Parent.x and Child2.x, but not Child1.x.

In Python, class variables are internally handled as dictionaries. If a variable name is not in the dictionary of the current class, then the interpreter searches the class hierarchy until the referenced variable name is there. From senior Python developers, just as with other developers, companies expect them to have some skills in addition to the technical qualifications.

How do you manage dependencies in a Python project, and what is the significance of a `requirements.txt` file?

By this point in the interview, you should have already had opportunities to showcase your skill and knowledge as a Python programmer. This question is more about showing your ability as a critical thinker and someone who is capable of both acknowledging and learning from your errors. We believe the best indicator of demand for a language is the number of job postings. We analyzed current job postings for senior Python developers on Indeed, Glassdoor, and Naukri.com. Over 70,000 job openings for the role on Naukri.com, followed by 5000+ requirements for seniors Python developers on Indeed, and over 3400 job openings on Glassdoor for the same position.

senior python developer interview questions

Scalability means creating services and microservices that can handle millions of users (large loads) without going down. This is a challenge that must be handled properly and writing scalable code is one way to make our service scalable. While technical competence is crucial, https://wizardsdev.com/en/vacancy/senior-python-developer/ it’s equally vital to gauge a candidate’s ability to collaborate effectively, communicate within your team, and align with your organization’s culture. These interview questions lay a strong foundation, but remember to adapt them to your company’s unique requirements.

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